S-8340/8341 Series
www.ablicinc.com
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM
SWITCHABLE SWITCHING REGULATOR CONTROLLER
© ABLIC Inc., 1999-2010 Rev.4.0_02
1
The S-8340/8341 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, oscillation circuit, error amplifier, phase compensation circuit, PWM control circuit (S-8340 Series), and PWM/PFM
switching control circuit (S-8341 Series).
Since the oscillation frequency is a high 300 kHz or 600 kHz, with the addition of a small external part, the S-8340/8341
Series functions as a highly efficient step-up switching regulator with a high output current. The speed of the output stage is
enhanced so that the N-channel power MOS with a low on-resistance can be switched quickly.
The S-8340 Series realizes low ripple, high efficiency, and excellent transient characteristics thanks to a PMW control circuit
capable of varying the duty ratio linearly from 0 to 82%, optimized error amplifier, and phase compensation circuit.
The S-8341 Series contains a PWM/PFM switching control circuit so that it operates using PWM control with a duty ratio of
27% or higher and using PFM control with a duty ratio of lower than 27% to ensure high efficiency in all load ranges.
These S-8340/8341 Series serve as ideal main power supply units for portable devices when coupled with the 8-Pin TSSOP
package and high oscillation frequencies.
Features
Oscillation frequency : 600 kHz (A and B types), 300 kHz (C and D types).
Output voltage : Selectable in 0.1 V steps between 2.5 to 6.0 V (output voltage fixed output type)
Output voltage accuracy : 2.0%
Output voltage external setting (FB) type available. FB terminal voltage (VFB) 1.0 V
External parts : Coil, diode, capacitors (3), transistor, and resistor only
Duty ratio : 0 to 82% (typ.) PWM control (S-8340 Series)
27 to 82% (typ.) PWM/PFM switching control (S-8341 Series A and B types)
21 to 82% (typ.) PWM/PFM switching control (S-8341 Series C and D types)
Low-voltage operation: Oscillation guaranteed to start when VDD 0.9 V
Built-in current limit circuit: Can be set with an external resistor (RSENSE)
Soft-start function set by an external capacitor (CSS)
Shutdown function
Lead-free, Sn 100%, halogen-free*1
*1. Refer to “ Product Name Structure” for details.
Applications
Power supplies for portable equipments such as PDAs, electronic notebooks, and cellular phones
Power supplies for audio equipments such as portable CD players, portable MD players, and headphone stereos
Main or local power supplies for notebook PCs and peripherals
Constant voltage power supplies for cameras, VCRs, and communication devices
Package
8-Pin TSSOP
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
2
Block Diagrams
(1) S-8340/8341 Series A and C Types (Output Voltage Fixed Output Type)
CS
RS
R2
R1
CC
VSS
VOUT
VOUT
SD
CL
ON/OFF
VDD
L
EXT
Shutdown
circuit
VIN
CVREF
CVREF
CSS
CSS
Nch Power
MOS FET
120 mV
RSENSE
SENSE
PW M comparator
Error amplifier
V
REF
=1.0 V
PWM, PWM/PFM
switching control
circuit
Triangular wave
oscillation circuit
Phase
IC internal power
compensation
Soft-start
circuit
Voltage/current
reference
circuit
supply
Figure 1
(2) S-8340/8341 Series B and D Types (Output Voltage External Setting Type)
CS
RS
RFB2
RFB1
CFB
VSS
VOUT
FB
SD
CL
ON/OFF
VDD
L
EXT
VIN
CVREF
CVREF
CSS
CSS
Nch Power
MOS FET
120 mV
RSENSE
SENSE
PW M comparator
V
REF
=1.0 V
Triangular wave
oscillation circuit
Phase
com
p
ensation
circuit
IC internal power
supply
Error amplifier
PWM, PW M/PFM
switching control
circuit
Shutdown
circuit
Soft-start
circuit
Voltage/current
reference
Figure 2
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
3
Product Name Structure
The control method, product type, and output voltage values for the S-8340/8341 Series can be selected depending on
usage. Refer to “1. Product Name” for the definition of the product name, “2. Package” regarding the package
drawings and “3. Product Name List” for the full product names.
1. Product Name
S
-834 x x xx A FT – T2 – x
Environmental code
U : Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications*1
Package name (abbreviation)
FT : 8-Pin TSSOP
Output voltage
25 to 60
(E.g., when the output voltage is 2.5 V, it is expressed as 25.)
Product type
A : Output voltage fixed output type, fOSC = 600 kHz
B : Output voltage external setting type, fOSC = 600 kHz
C : Output voltage fixed output type, fOSC = 300 kHz
D : Output voltage external setting type, fOSC = 300 kHz
Control method
0 : PWM control
1 : PWM/PFM switching control
*1. Refer to the tape drawing.
2. Package
Package Name Drawing Code
Package Tape Reel
8-Pin TSSOP Environmental code = G FT008-A-P-SD FT008-E-C-SD FT008-E-R-SD
Environmental code = U FT008-A-P-SD FT008-E-C-SD FT008-E-R-S1
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
4
3. Product Name List
(1) Output Voltage Fixed Output Type
Table 1
Output Voltage
(V)
S-8340 Series
A Type
fOSC = 600 kHz
PWM Control
S-8341 Series
A Type
fOSC = 600 kHz
PWM/PFM Switching
Control
S-8340 Series
C Type
fOSC = 300 kHz
PWM Control
S-8341 Series
C Type
fOSC = 300 kHz
PWM/PFM Switching
Control
2.5 V S-8340A25AFT-T2-x S-8341A25AFT-T2-x S-8340C25AFT-T2-x S-8341C25AFT-T2-x
3.0 V S-8340A30AFT-T2-x S-8341A30AFT-T2-x S-8340C30AFT-T2-x S-8341C30AFT-T2-x
3.3 V S-8340A33AFT-T2-x S-8341A33AFT-T2-x S-8340C33AFT-T2-x S-8341C33AFT-T2-x
3.4 V S-8340A34AFT-T2-x
3.5 V S-8340A35AFT-T2-x
5.0 V S-8340A50AFT-T2-x S-8341A50AFT-T2-x S-8340C50AFT-T2-x S-8341C50AFT-T2-x
5.1 V S-8340A51AFT-T2-x S-8341C51AFT-T2-x
5.6 V S-8340A56AFT-T2-x
6.0 V S-8340A60AFT-T2-x S-8340C60AFT-T2-x
Remark 1. Contact the ABLIC Inc. marketing department for products with an output voltage other than those
specified above.
2. x: G or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
(2) Output Voltage External Setting Type
Table 2
Output Voltage
(V)
S-8340 Series
B Type
fOSC = 600 kHz
PWM Control
S-8341 Series
B Type
fOSC = 600 kHz
PWM/PFM Switching
Control
S-8340 Series
D Type
fOSC = 300 kHz
PWM Control
S-8341 Series
D Type
fOSC = 300 kHz
PWM/PFM Switching
Control
External setting S-8340B00AFT-T2-x S-8341B00AFT-T2-x S-8340D00AFT-T2-x S-8341D00AFT-T2-x
Remark 1. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
5
Pin Configurations
Table 3
3
4
2
1
6
5
7
8-Pin TSSOP
To
p
view
8
Figure 3
Pin No. Symbol Pin Description
1 VSS GND pin
2 CVREF
Reference voltage source pass capacitor connection
pin
3 CSS Soft-start capacitor connection pin
4 ON/OFF
Shutdown pin
“H” : Normal operation (step-up operating)
“L” : Entire circuit stopped (step-up stopped)
5 VDD IC power supply pin
6 VOUT
(FB)
Output voltage fixed output type :
Output voltage monitoring pin
[Output voltage external setting type :
Feedback pin]
7 EXT External transistor connection pin
8 SENSE Current limit detection pin
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
6
Absolute Maximum Ratings
Table 4
(Ta = 25C unless otherwise specified)
Parameter Symbol Absolute Maximum Rating Unit
VDD pin voltage VDD V
SS 0.3 to VSS 12 V
VOUT pin voltage VOUT V
SS 0.3 to VSS 12 V
FB pin voltage VFB V
SS 0.3 to VSS 12 V
CVREF pin voltage VCVREF V
SS 0.3 to VDD 0.3 V
CSS pin voltage VCSS V
SS 0.3 to VDD 0.3 V
ON/OFF pin voltage VON/OFF V
SS 0.3 to VSS 12 V
SENSE pin voltage VSENSE V
SS 0.3 to VSS 12 V
EXT pin voltage VEXT V
SS 0.3 to VDD 0.3 V
EXT pin current IEXT 100 mA
Power dissipation PD 300 (When not mounted on board) mW
700*1 mW
Operating ambient temperature Tdpr 40 to 85 C
Storage temperature Tstg 40 to 125 C
*1. When mounted on board
[Mounted board]
(1) Board size : 114.3 mm × 76.2 mm × t1.6 mm
(2) Board name : JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
(1) When mounted on board (2) When not mounted on board
050 100 150
600
400
200
0
Power dissipation P
D
(mW)
Ambient temperature Ta (C)
500
300
100
700
800
050 100 150
300
200
100
0
Power dissipation P
D
(mW)
Ambient temperature Ta (C)
400
Figure 4 Power Dissipation of Packages
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
7
Electrical Characteristics
(1) 600 kHz, Output Voltage Fixed Type (A Type)
Table 5
(Ta = 25C unless otherwise specified)
Parameter Symbol Conditions Min. Typ. Max. Unit
Measurement
Circuit
Output voltage*1 V
OUT(E) VIN VOUT(S) 0.6,
IOUT VOUT
(
S
)
/50
VOUT(S)
0.98 VOUT(S) VOUT(S)
1.02 V 1
Input voltage VIN 6 V 1
Oscillation start voltage VST No external parts.
The voltage is applied to VOUT. 0.9 V 2
Current consumption 1 ISS1 V
OUT VOUT(S) 0.95,
EXT pin open
S-834xA25 34 350 640 A 2
S-834xA35 44 460 810 A 2
S-834xA45 54 630 1060 A 2
S-834xA55 60 810 1250 A 2
Current consumption 2 ISS2 V
OUT VOUT
(
S
)
0.5 V, EXT pin open 180 300 A 2
Current consumption
at shutdown ISSS VOUT VOUT(S) 0.95, VON/OFF 0 V 3.0 A 2
EXT pin output current IEXTH V
EXT VOUT(E) 0.2 V S-834xA25 34 13 24 mA
S-834xA35 44 17 30 mA
S-834xA45 54 21 34 mA
S-834xA55 60 23 37 mA
IEXTL V
EXT 0.2 V S-834xA25 34 32 56 mA
S-834xA35 44 42 69 mA
S-834xA45 54 50 78 mA
S-834xA55 60 56 85 mA
Line regulation VOUT1 VIN VOUT(S) 0.4 to VOUT(S) 0.6
IOUT VOUT
(
S
)
/50 VOUT(S)
0.5%
VOUT(S)
1% V 1
Load regulation VOUT2 V
IN VOUT(S) 0.6, 10 A IOUT VOUT(S)/40 VOUT(S)
0.5%
VOUT(S)
1% V 1
Output voltage
temperature coefficient*2
VOUT
TaVOUT
VIN VOUT(S) 0.6, IOUT VOUT(S)/50 ,
Ta 40 to 85C 100 ppm/C1
Oscillation frequency fOSC VOUT VOUT(S) 0.95
Measure waveform at the EXT pin 510 600 690 kHz 2
Maximum duty ratio MaxDuty VIN VOUT(S) 0.95
Measure waveform at the EXT pin 73 82 89 % 2
PWM/PFM switching
duty ratio
(S-8341 Series A type)
PFMDuty VIN VOUT(E) 0.1 V, under no load 19 27 35 % 1
Current limit detection
voltage VSENSE
VOUT VOUT(S) 0.95
Judge oscillation at the EXT pin or oscillation
stop at “L”
90 120 150 mV 2
ON/OFF pin input voltage VSH V
OUT VOUT(S) 0.95
Judge oscillation at the EXT pin. 0.8 V 2
VSL V
OUT VOUT(S) 0.95
Judge oscillation stop at the EXT pin. 0.3 V 2
ON/OFF pin input
leakage current
ISH V
OUT 6 V, VON/OFF 6 V 0.1 0.1 A 2
ISL V
OUT 6 V, VON/OFF 0 V 0.1 0.1 A 2
Soft-start time tSS V
IN VOUT(S) 0.6, CSS 4700
pF, IOUT VOUT(S)/50 S-8340Axx 3.0 6.0 14.0 ms 1
Measure time until oscillation
occurs at the EXT pin. S-8341Axx 3.0 8.0 14.0 ms 1
Efficiency EFFI VIN VOUT(S) 0.6,
IOUT VOUT(S)/50
S-834xA25 34 83 % 1
S-834xA35 44 85 % 1
S-834xA45 54 87 % 1
S-834xA55 60 87 % 1
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
8
External parts Coil : Sumida Corporation CD54 (10 H)
Diode : Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Capacitor : Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Transistor : Sanyo Electric Co., Ltd. 2SD1628G
Base resistor (Rb) : 1.0 k
Base capacitor (Cb) : 2200 pF (ceramic type)
C
VREF : 0.01 F
C
SS : 4700 pF
The VDD pin is connected to the VOUT pin.
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
*1. VOUT(S) : Set output voltage value
V
OUT(E) : Actual output voltage value : Output voltage value when IOUT VOUT(S)/50 and VIN VOUT(S) 0.6.
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula.
V
OUT
Ta V
OUT
[mV/C]
V
OUT
Ta V
OUT(S)
[V]
= [ppm/C] 1000
(Change of output voltage (Set output voltage (Output voltage temperature
with temperature) value) coefficient)
Caution The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is not taken from VOUT, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (3.0 ms).
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
9
(2) 600 kHz, Output Voltage External Setting Type (B Type)
Table 6
(Ta = 25C unless otherwise specified)
Parameter Symbol Conditions Min. Typ. Max. Unit
Measurement
Circuit
Output voltage*1 V
OUT
(
E
)
V
IN 2.4 V, IOUT 80 mA 3.920 4.000 4.080 V 3
FB pin voltage VFB V
IN 2.4 V, IOUT 80 mA 0.980 1.000 1.020 V 3
Input voltage VIN 6 V 3
Oscillation start voltage VST2 No external parts.
The voltage is applied to VDD. 0.9 V 4
Current consumption 1 ISS1 V
OUT 3.8 V 460 740 A 4
Current consumption 2 ISS2 V
OUT 4.5 V 180 300 A 4
Current consumption
at shutdown ISSS V
OUT 3.8 V, VON/OFF 0 V 3.0 A 4
EXT pin output current IEXTH V
EXT VOUT
(
E
)
0.2 V 19 30 mA
IEXTL V
EXT 0.2 V 46 69 mA
Line regulation VOUT1 1.6 V VIN 2.4 V, IOUT 80 mA 20 40 mV 3
Load regulation VOUT2 V
IN 2.4 V, 10 A IOUT 100 mA 20 40 mV 3
Output voltage
temperature coefficient*2
VOUT
TaVOUT VIN 2.4 V, IOUT 80 mA, Ta 40 to 85°C 100 ppm/°C 3
Oscillation frequency fOSC V
OUT 3.8 V, measure waveform at the EXT pin 510 600 690 kHz 4
Maximum duty ratio MaxDuty VIN 3.8 V, measure waveform at the EXT pin 73 82 89 % 4
PWM/PFM switching
duty ratio
(S-8341 Series B type)
PFMDuty VIN VOUT(E) 0.1 V, under no load 19 27 35 % 3
Current limit detection
voltage VSENSE
VOUT 3.8 V
Judge oscillation at the EXT pin or oscillation
stop at “L”
90 120 150 mV 4
FB pin input current IFB V
OUT 6 V, VFB 1.5 V 50 50 nA 4
ON/OFF pin input voltage VSH V
OUT 3.8 V
Judge oscillation at the EXT pin. 0.8 V 4
VSL V
OUT 3.8 V
Judge oscillation stop at the EXT pin. 0.3 V 4
ON/OFF pin input
leakage current
ISH V
OUT 6 V, VON/OFF 6 V 0.1 0.1 A 4
ISL V
OUT 6 V, VON/OFF 0 V 0.1 0.1 A 4
Soft-start time tSS VIN 2.4 V,
CSS 4700 pF,
IOUT 80 mA,
S-8340B00 3.0 6.0 14.0 ms 3
Measure time until oscillation
occurs at the EXT pin.
S-8341B00 3.0 8.0 14.0 ms 3
Efficiency EFFI VIN 2.4 V, IOUT 80 mA 85 % 3
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
10
External parts Coil : Sumida Corporation CD54 (10 H)
Diode : Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Capacitor : Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Transistor : Sanyo Electric Co., Ltd. 2SD1628G
Base resistor (Rb) : 1.0 k
Base capacitor (Cb) : 2200 pF (ceramic type)
C
VREF : 0.01 F
C
SS : 4700 pF
R
FB1 : 300 k
R
FB2 : 100 k
C
FB : 50 pF
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
*1. VOUT(E) : Actual output voltage value : Output voltage value when IOUT 80 mA and VIN = 2.4 V is applied.
The Typ. value (set output voltage value) is 1 + [V]
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula. However, the
temperature change rates for RFB1 and RFB2 are assumed to be the same.
1
V
OUT
Ta
V
OUT
V
OUT
Ta
R
FB1
R
FB2
[mV/C] [ppm/C] 1000
(Change of output voltage (Set output (Output voltage temperature
with temperature) voltage value) coefficient)
Caution The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is other than 4.0 V, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (3.0 ms).
300 k
100 k
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
11
(3) 300 kHz, Output Voltage Fixed Type (C Type)
Table 7
(Ta = 25C unless otherwise specified)
Parameter Symbol Conditions Min. Typ. Max. Unit
Measurement
Circuit
Output voltage*1 V
OUT(E) VIN VOUT(S) 0.6,
IOUT VOUT
(
S
)
/50
VOUT(S)
0.98 VOUT(S) VOUT(S)
1.02 V 1
Input voltage VIN 6 V 1
Oscillation start voltage VST No external parts.
The voltage is applied to VOUT. 0.9 V 2
Current consumption 1 ISS1 V
OUT VOUT(S) 0.95,
EXT pin open
S-834xC25 34 210 430 A 2
S-834xC35 44 270 520 A 2
S-834xC45 54 350 650 A 2
S-834xC55 60 440 740 A 2
Current consumption 2 ISS2 V
OUT VOUT
(
S
)
0.5 V, EXT pin open 110 185 A 2
Current consumption
at shutdown ISSS VOUT VOUT(S) 0.95, VON/OFF 0 V 3.0 A 2
EXT pin output current IEXTH V
EXT VOUT(E) 0.2 V S-834xC25 34 13 24 mA
S-834xC35 44 17 30 mA
S-834xC45 54 21 34 mA
S-834xC55 60 23 37 mA
IEXTL V
EXT 0.2 V S-834xC25 34 32 56 mA
S-834xC35 44 42 69 mA
S-834xC45 54 50 78 mA
S-834xC55 60 56 85 mA
Line regulation VOUT1 VIN VOUT(S) 0.4 to VOUT(S) 0.6
IOUT VOUT
(
S
)
/50 VOUT(S)
0.5%
VOUT(S)
1% V 1
Load regulation VOUT2 V
IN VOUT(S) 0.6, 10 A IOUT VOUT(S)/40 VOUT(S)
0.5%
VOUT(S)
1% V 1
Output voltage
temperature coefficient*2
VOUT
TaVOUT
VIN VOUT(S) 0.6, IOUT VOUT(S)/50
Ta 40 to 85C 100 ppm/C1
Oscillation frequency fOSC VOUT VOUT(S) 0.95
Measure waveform at the EXT pin 255 300 345 kHz 2
Maximum duty ratio MaxDuty VIN VOUT(S) 0.95
Measure waveform at the EXT pin 73 82 89 % 2
PWM/PFM switching
duty ratio
(S-8341 Series C type)
PFMDuty VIN VOUT(E) 0.1 V, under no load 15 21 31 % 1
Current limit detection
voltage VSENSE
VOUT VOUT(S) 0.95
Judge oscillation at the EXT pin or oscillation
stop at “L”
90 120 150 mV 2
ON/OFF pin input voltage VSH V
OUT VOUT(S) 0.95
Judge oscillation at the EXT pin. 0.8 V 2
VSL V
OUT VOUT(S) 0.95
Judge oscillation stop at the EXT pin. 0.3 V 2
ON/OFF pin input
leakage current
ISH V
OUT 6 V, VON/OFF 6 V 0.1 0.1 A 2
ISL V
OUT 6 V, VON/OFF 0 V 0.1 0.1 A 2
Soft-start time tSS V
IN VOUT(S) 0.6, CSS 4700
pF, IOUT VOUT(S)/50 , S-8340Cxx 6.0 14.3 28.0 ms 1
Measure time until oscillation
occurs at EXT pin. S-8341Cxx 6.0 17.2 28.0 ms 1
Efficiency EFFI VIN VOUT
(
S
)
0.6, S-834xC25 34 83 % 1
IOUT VOUT(S)/50 S-834xC35 44 85 % 1
S-834xC45 54 87 % 1
S-834xC55 60 87 % 1
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
12
External parts Coil : Sumida Corporation CD54 (10 H)
Diode : Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Capacitor : Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Transistor : Sanyo Electric Co., Ltd. 2SD1628G
Base resistor (Rb) : 1.0 k
Base capacitor (Cb) : 2200 pF (ceramic type)
C
VREF : 0.01 F
C
SS : 4700 pF
The VDD pin is connected to the VOUT pin.
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
*1. VOUT(S) : Set output voltage value
V
OUT(E) : Actual output voltage value : Output voltage value when IOUT VOUT(S)/50 and VIN VOUT(S) 0.6.
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula.
V
OUT
Ta V
OUT
[mV/C]
V
OUT
Ta V
OUT(S)
[V]
= [ppm/C] 1000
(Change of output voltage (Set output voltage (Output voltage temperature
with temperature) value) coefficient)
Caution The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is not taken from VOUT, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (6.0 ms).
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
13
(4) 300 kHz, Output Voltage External Setting Type (D Type)
Table 8
(Ta = 25C unless otherwise specified)
Parameter Symbol Conditions Min. Typ. Max. Unit
Measurement
Circuit
Output voltage*1 V
OUT
(
E
)
V
IN = 2.4 V, IOUT = 80 mA 3.920 4.000 4.080 V 3
FB pin voltage VFB V
IN = 2.4 V, IOUT = 80 mA 0.980 1.000 1.020 V 3
Input voltage VIN 6 V 3
Oscillation start voltage VST2 No external parts.
The voltage is applied to VDD. 0.9 V 4
Current consumption 1 ISS1 V
OUT = 3.8 V 255 460 A 4
Current consumption 2 ISS2 V
OUT = 4.5 V 110 185 A 4
Current consumption
at shutdown ISSS V
OUT = 3.8 V, VON/OFF = 0 V 3.0 A 4
EXT pin output current IEXTH V
EXT = VOUT
(
E
)
0.2 V 19 30 mA
IEXTL V
EXT = 0.2 V 46 69 mA
Line regulation VOUT1 1.6 V VIN 2.4 V, IOUT = 80 mA 20 40 mV 3
Load regulation VOUT2 V
IN = 2.4 V, 10 A IOUT 100 mA 20 40 mV 3
Output voltage
temperature coefficient*2
VOUT
TaVOUT VIN = 2.4 V, IOUT = 80 mA, Ta = 40to 85°C 100 ppm/°C 3
Oscillation frequency fOSC V
OUT = 3.8 V, Measure waveform at the EXT pin 255 300 345 kHz 4
Maximum duty ratio MaxDuty VIN = 3.8 V, Measure waveform at the EXT pin 73 82 89 % 4
PWM/PFM switching
duty ratio
(S-8341 Series D type)
PFMDuty VIN = VOUT(E) 0.1 V, Under no load 15 21 31 % 3
Current limit detection
voltage VSENSE
VOUT = 3.8 V
Judge oscillation at the EXT pin or oscillation
stop at “L”
90 120 150 mV 4
FB pin input current IFB V
OUT = 6 V, VFB = 1.5 V 50 50 nA 4
ON/OFF pin input voltage VSH V
OUT = 3.8 V
Judge oscillation at the EXT pin. 0.8 V 4
VSL V
OUT = 3.8 V
Judge oscillation stop at the EXT pin. 0.3 V 4
ON/OFF pin input
leakage current
ISH V
OUT = 6 V, VON/OFF = 6 V 0.1 0.1 A 4
ISL V
OUT = 6 V, VON/OFF = 0 V 0.1 0.1 A 4
Soft-start time tSS V
IN = 2.4 V,
CSS = 4700 pF, S-8340D00 6.0 14.3 28.0 ms 3
IOUT = 80 mA,
Measure time until oscillation
occurs at the EXT pin.
S-8341D00 6.0 17.2 28.0 ms 3
Efficiency EFFI VIN = 2.4 V, IOUT = 80 mA 85 % 3
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
14
External parts Coil : Sumida Corporation CD54 (10 H)
Diode : Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Capacitor : Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Transistor : Sanyo Electric Co., Ltd. 2SD1628G
Base resistor (Rb) : 1.0 k
Base capacitor (Cb) : 2200 pF (ceramic type)
C
VREF : 0.01 F
C
SS : 4700 pF
R
FB1 : 300 k
R
FB2 : 100 k
C
FB : 50 pF
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
*1. VOUT(E) : Actual output voltage value : Output voltage value when IOUT 80 mA and VIN = 2.4 V is applied.
The Typ. value (set output voltage value) is 1 + [V]
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula. However, the
temperature change rates for RFB1 and RFB2 are assumed to be the same.
1
V
OUT
Ta
V
OUT
V
OUT
Ta
R
FB1
R
FB2
[mV/C] [ppm/C] 1000
(Change of output voltage (Set output (Output voltage temperature
with temperature) voltage value) coefficient)
Caution The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is other than 4.0 V, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (6.0 ms).
300 k
100 k
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
15
Measurement Circuits
1.
+
+
L
RL
CL
CIN
Rb
Cb
SD
VIN
VDD
ON/OFFVSS
VOUT
EXT
CSS
CVREF
SENSE
V
Figure 5
2.
+
Oscilloscope
VDD
ON/OFF
VSS
VOUT
EXT
CSS CVREF
SENSE
A
A
Figure 6
3.
+
+
L
RFB2
RFB1
CFB
RL
CL
CIN
Rb
Cb
SD
VIN
VDD
ON/OFFVSS
FBEXT
CSS CVREF
SENSE
V
Figure 7
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
16
4.
VDD
ON/OFF
VOUT
VSS
RFB2
CFB RFB1
FBEXT
CSS CVREF
SENSE +
A
A
A
Oscilloscope
Figure 8
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
17
Operation
1. Switching Control Method
1. 1 PWM Control (S-8340 Series)
The S-8340 Series is a DC-DC converter using a pulse width modulation method (PWM).
In conventional PFM DC-DC converters, pulses are skipped when the output load current is low, causing a
fluctuation in the ripple frequency of the output voltage, resulting in an increase in the ripple voltage.
The switching frequency does not change, although the pulse width changes from 0 to 82% corresponding to each
load current in the S-8340 Series. The ripple voltage generated from switching can thus be eliminated easily
through a filter. When the pulse width is 0% (when no load is applied or the input voltage is high), pulses are
skipped and the current consumption is low.
1. 2 PWM/PFM Switching Control (S-8341 Series)
The S-8341 Series is a DC-DC converter that automatically switches between a pulse width modulation method
(PWM) and a pulse frequency modulation method (PFM) depending on the load current.
The S-8341 Series operates under PWM control with the pulse duty changing from 27 to 82% (A and B types) and
from 21 to 82% (C and D types) in a high output load current area.
The S-8341 Series operates under PFM control with the pulse duty fixed at 27% (A and B types) and at 21% (C and
D types) in a low load current area, and pulses are skipped according to the load current. The oscillation circuit
thus oscillates intermittently so that the resultant lower self current consumption prevents a reduction in the
efficiency at a low load current. The switching point from PWM control to PFM control depends on the external
devices (coil, diode, etc.), and input and output voltage values. The S-8341 Series is an especially highly efficient
DC-DC converter at an output load current around 1 mA.
2. Soft-Start Function
The S-8340/8341 Series has a built-in soft-start circuit.
This circuit enables the output voltage (VOUT) to rise gradually over the specified soft-start time (tSS) to suppress the
overshooting of the output voltage and the rush current from the power supply when the power is switched on or the
ON/OFF pin is changed to “H”.
Generally, a rush current flows to an output capacitor through an inductor and a diode in the step-up circuit
immediately after the power is turned on as shown in Figure 9. Note that the soft-start function of this IC, however,
does not limit this current.
t (2 m s/d iv)
Output voltage
(1 V/div)
Rush current
(0.5 A/div)
3 V
0 V
1.5 A
0 A
S-8340A33AFT
(
VIN
0 1.9 V, RL
300 k
)
Figure 9 Waveforms of Output Voltage and Rush Current at Soft-Start
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
18
The soft-start circuit of the S-8340/8341 Series increases the duty ratio gradually as shown in Figure 10.
The soft-start time (tSS) can be set with an external capacitor (CSS).
Figure 10 Image of EXT Pin Waveform
If fOSC 600 kHz and CSS 4700 pF, the time until the duty ratio of 50% is reached is 9.7 ms (typ.).
If VIN 2 V, the approximate time until a specific duty ratio is reached is calculated from the following formula :
If fOSC 600 kHz, tSS [ms] = CSS [pF]
If fOSC 300 kHz, tSS [ms] = CSS [pF]
Even if the IC reaches a certain duty at a duty ratio of 0 to 43%, there may be a delay of the output voltage (VOUT) in
reaching the specified voltage (VOUT(S)). This delay occurs due to the delay of the error amplifier reference voltage
in reaching the specified voltage (1.0 V). Note that the maximum delay time may be the value calculated when a
duty ratio is 43%.
3. ON/OFF Pin (Shutdown Pin)
The ON/OFF pin stops or starts the step-up operation.
When the ON/OFF pin is set to "L", all the internal circuits stop operating, reducing power consumption. The EXT
pin voltage becomes equal to the VSS voltage, thereby turning off the switching transistor.
The ON/OFF pin is configured as shown in Figure 11 and is not either pulled up or pulled down. So, do not use it
in a floating state. Applying 0.3 to 0.8 V to the ON/OFF pin increases current consumption. So do not apply such
voltage. When the ON/OFF pin is not used, connect it to the VDD pin. The ON/OFF pin does not have hysterisis.
ON/OFF
VDD
VSS
Figure 11 ON/OFF Pin Structure
ON/OFF Pin CR Oscillation Circuit Output Voltage
“H” Operating Set value
“L” Stopped VIN
*1
*1. Voltage obtained by extracting the voltage drop due to DC
resistance of the inductor and the diode forward voltage from VIN.
6.564 Duty [%] + 698
229000
8.336 Duty [%] + 682.45
535000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
19
4. Current Limit Circuit
The current limit circuit of the S-8340/8341 Series protects the external transistors from being damaged by heat due
to an overload or magnetic saturation of coils. Inserting a SENSE resistor (RSENSE) between the external FET
source or external NPN bipolar transistor emitter and Vss and entering a connection point with a sensor resistor into
the SENSE pin enables the current limit to function. Refer to “ Standard Circuit”.
A current limiting comparator in the IC monitors the SENSE pin for reaching the current limit detection voltage
(VSENSE 120 mV (typ.)). Upon detection of the voltage, the external transistor is held off for one clock of the
oscillator so that the current flowing in the external transistor is limited. At the ON signal of the next clock, the
external transistor is turned on and the current limit detection function is resumed.
However, this current limit circuit contains a CR filter with a time constant ( = 220 ns (typ.)) between the SENSE
pin and the current limiting comparator in the IC to prevent detection errors caused by the spike voltage generated
at the SENSE pin. If the time (pulse width tON : “H” level time at the EXT pin) after the external transistor turns on
until the current limit circuit operates is short, the current value that is actually limited becomes higher than the
current limit setting value determined by VSENSE/RSENSE as a side effect. The actual limit current value (ILIMIT) is
expressed by the following equation :
IV
R1e
LIMIT
SENSE
SENSE
ton 0.5
CR

Remark CR in the equation is determined by the internal CR filter and varies in the range 116 to 470 ns (220 ns
(typ.).)
Caution Therefore, this current limit function does not guarantee full protection of external parts by ILIMIT
VSENSE/RSENSE under all operating conditions. Perform a thorough evaluation using the actual
devices.
For example, usage when the current value that the current limit circuit actually functions to raise the current limit
set value decided by VSENSE/RSENSE that includes usage under the conditions that the input voltage become close to
the output voltage or situations when the output voltage falls due to the activation of the current limit circuit and
become close to the input voltage.
Figure 12 shows an example of the actually measured increase of the peak current flowing through the coil when
the current limit circuit functions while the input voltage is nearing the output voltage.
Figure 13 shows an example of the actually measured increase of the peak current flowing through the coil when
the output voltage drops and approaches the input voltage by increasing the output current after the current limit
circuit functions.
Input Voltage (VIN) vs. Coil Peak Current (ILPEA
K
)Output Current (IOUT) vs. Coil Peak Current (ILPEA
K
)
0
1
2
3
4
1 2 3 4 5
V
IN
(V)
IL
PEAK
(A)
V
SENSE
/ R
SENSE
S-8340A50 (R
SENSE
51 m)
0
1
2
3
4
1 2 3
I
OUT
(A)
IL
PEAK
(A)
S-8340A50 (V
IN
3V, R
SENSE
51 m)
Influence of CR filter
0
V
SENSE
/ R
SENSE
Current limit circuit
is activated
5
Figure 12 ILPEAK Measured at Activation of Current Limit
(VOUT Starts to Fall)
Figure 13 Measuring Coil Peak Current (ILPEAK)
If the current limit circuit is not used, remove RSENSE and connect the external transistor source or the emitter and
the SENSE pin to VSS.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
20
Series Products and External Parts Selection
1. Method for Selecting Series Products
The S-8340/8341 Series is classified into eight types, according to the control systems (PWM and PWM/PFM
switching), oscillation frequencies, and output voltage setting types.
The following describes the features of respective types. Select the type according to the applications.
1. 1 Control Systems
Two different control systems are available : PWM control system (S-8340 Series) and PWM/PFM switching control
system (S-8341 Series).
For applications for which the load current greatly differs between standby and operation, if the efficiency during
standby is important, applying the PWM/PFM switching system (S-8341 Series) realizes high efficiency during
standby.
For applications for which switching noise is critical, applying the PWM control system (S-8340 Series) whereby
switching frequency does not change due to load current allows the ripple voltage to be easily eliminated by using a
filter.
1. 2 Oscillation Frequencies
Either oscillation frequencies, 600 kHz (A and B types) or 300 kHz (C and D types), can be selected.
The A and B types whereby high operation frequency allows the L value to be reduced, so a small inductor can be
used. In addition, use of small output capacitors is effective for downsizing devices.
The C and D types, whereby lower oscillation frequency realizes smaller self-consumption current, are highly
efficient under light loads. In particular, the C type, when combined with a PWM/PFM switching control system,
drastically improves the operation efficiency when the output load current is approximately 1 mA.
1. 3 Output Voltage Setting
Either fixed output type (A and C types) or external setting type (B and D types) can be selected.
The A and C types, whereby output voltage can be internally set between 2.5 and 6.0 V in the 0.1 V steps, realizes
highly accurate output voltage of 2.0% with internal highly resistant and highly accurate resistors.
In the B and D types, the output voltage can be adjusted in the range 2.5 to 6.0 V by adding external resistors (RFB1
and RFB2) and a capacitor (CFB).
A temperature gradient can be provided by installing a thermistor in series to RFB1 and RFB2.
The resistance of RFB1 RFB2 must not exceed 2 M, and set the ratio of RFB1 to RFB2 so that the FB pin is at 1.0 V.
Add CFB in parallel with RFB1 to prevent unstable operation due to output oscillation.
Set CFB so that fOSC 1/(2 CFB RFB1) is 0.1 to 20 kHz (normally, 10 kHz).
Example : VOUT 3.0 V, RFB1 200 k, RFB2 100 k, CFB 100 pF
The accuracy of the output voltage VOUT set with resistors RFB1 and RFB2 is affected by the absolute precision of
external resistors RFB1 and RFB2, the FB pin input current (IFB) and IC power supply voltage (VDD) as well as the
precision of the voltage at FB pin (1 V 2.0%).
When it is assumed that IFB is 0 nA, the maximum absolute value variations of external resistors RFB1 and RFB2 are
RFB1max. and RFB2max., the minimum absolute value variations of external resistors RFB1 and RFB2 are RFB1min. and
RFB2min., and the shift of the output voltage due to the dependence of voltage on VDD is V, the minimum value
(VOUT min.) and maximum value (VOUT max.) of variations of VOUT are expressed by the following formulas :
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
21
V
OUT min. (1 ) 0.98 V V
V
OUT max. (1 ) 102 V V
RFB1 and RFB2 must be adjusted in order to set the voltage accuracy of VOUT to the IC output voltage accuracy (VOUT
2.0) or lower. The smaller RFB1 and RFB2 are, the less VOUT is affected by the absolute value accuracy of RFB1
and RFB2. The smaller RFB1 and RFB2 are, the less VOUT is affected by IFB.
To reduce the influence due to IFB that affects variations of VOUT, the RFB2 value must be set to a value sufficiently
lower than the input impedance at the FB pin (1 V/50 nA 20 M (max.)).
Reactive current flows through RFB1 and RFB2. Unless the reactive current value is limited as low as possible with
respect to the actual load current, efficiency decreases. Therefore, RFB1 and RFB2 should be sufficiently large.
Caution If the RFB1 and RFB2 values are too large (1 M or more), VOUT is subject to be affected by external
noise, therefore, thoroughly test the performance with the actual equipment.
Since the accuracy of VOUT and reactive current must be traded off, they must be considered according to
application requirements.
Caution Connect the VDD pin to the VOUT pin for both the fixed output types and external setting types
as shown in “ Standard Circuit”. In the cases when VDD requires to be applied from VIN or
other power source instead of VOUT, raise VDD to 2.5 V or higher within the soft-start time (3.0 ms:
A and B types, 6.0 ms: C and D types).
When the VDD pin is connected to the VOUT pin, VIN can be increased slowly without any
problems.
The table below provides a rough guide for selecting a product type according to the application requirements of the
application.
Choose the product that gives you the largest number of circles (O).
Table 9
S-8340 S-8341
A B C D A B C D
The set output voltage is 6 V or less
Set an output voltage freely
The efficiency under light loads (approx. 1mA) is an
important factor
To be operated with a medium load current (200 mA
class)
To be operated with a high load current (1 A class)
It is important to have a low-ripple voltage
Downsizing of external components is important
Remark The symbol " " denotes an indispensable condition, while the symbol "" indicates that the
corresponding series has superiority in that aspect. The symbol "" indicates particularly high
superiority.
RFB1 min.
RFB2 max.
RFB1 max.
RFB2 min.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
22
2. Inductor
The inductance value (L value) greatly affects the maximum output current (IOUT) and the efficiency ().
As the L value is reduced gradually, the peak current (IPK) increases and IOUT increases. As the L value is made
even smaller, IOUT decreases since the efficiency degrades and the current driveability is insufficient.
As the L value is increased, the dissipation in the switching transistor due to IPK decreases, and the efficiency
reaches the maximum at a certain L value. As the L value is made even larger, the efficiency degrades since the
dissipation due to the series resistance of the inductor increases. IOUT also decreases.
In the S-8340/8341 Series, as the L value is increased, the output voltage may be unstable depending on the
conditions of the input voltage, output voltage, and load current. Select the L value after performing a thorough
valuation under actual use conditions. The guidelines for the L range are from 2.2 to 22 H for the A and B types,
and 4.7 to 47 H for the C and D types.
The recommended L value is 5 to 10 H for the A and B types, and 10 to 22 H for the C and D types.
When choosing an inductor, attention to its allowable current should be paid since the current exceeding the
allowable value will cause magnetic saturation in the inductor, leading to a marked decline in efficiency and a
breakdown of the IC due to large current.
An inductor should therefore be selected so that IPK does not surpass its allowable current. IPK is represented by
the following equations in non-continuous operation mode.
IPK 2I V V V
fosc
OUT OUT F IN()
L

Where fOSC is the oscillation frequency, L is the inductance value of the inductor, and VF is the forward voltage of
the diode. VF should be appropriately 0.4 V.
For example, if a power supply with the input voltage (VIN) 3 V, output voltage (VOUT) 5 V, and load current (IOUT)
30 mA is used, fOSC 600 kHz when the S-8340A50AFT is used. When 10 H is selected for the L value, IPK
155 mA from the above formula. Therefore, in this case, an inductor with a permissible current of 155 mA or
higher for the L value of 10 H should be selected.
3. Diode
Use an external diode that meets the following requirements :
Low forward voltage (Schottky barrier diode is recommended.)
High switching speed (50 ns max.)
The reverse-direction withstand voltage is VOUT VF or higher.
The current rating is IPK or larger.
4. Capacitors (CIN, CL)
A capacitor inserted on the input side (CIN) improves the efficiency by reducing the power impedance and stabilizing
the input current. Select a CIN value according to the impedance of the power supply used. Approximately 47 to
100 F is recommended for a capacitance depending on the impedance of the power source and load current value.
For the output side capacitor (CL), select a large capacitance with low ESR (Equivalent Series Resistance) for
smoothing the ripple voltage. When the input voltage is extremely high or the load current is extremely large, the
output voltage may become unstable. In this case the unstable area will become narrow by selecting a large
capacitance for an output capacitor. A tantalum electrolyte capacitor is recommended since the unstable area
widens when a capacitor with a large ESR, such as an aluminum electrolyte capacitor, or a capacitor with a small
ESR, such as a ceramic capacitor, is chosen.
It is recommended that a capacitor of which the capacitance is 47 to 200 F and ESR is 40 to 270 m be selected.
Fully evaluate input and output capacitors under actual operating conditions, then select them.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
23
5. External Transistors
Enhancement (N-channel) MOS FET type or bipolar (NPN) type can be used for the external transistors.
5. 1 Enhancement (N-Channel) MOS FET Type
The EXT pin can directly drive an N-channel MOS FET. When an N-channel MOS FET is used, efficiency will be 2
to 3% higher than that achieved by an NPN bipolar transistor since the MOS FET switching speed is faster and
power dissipation due to the base current is avoided.
A large current may flow at power on with some MOS FETs selected. Perform thorough evaluation using the
actual devices to select. The recommended gate capacitance of the MOS FET to be used is 1200 pF or smaller.
The important parameters in selecting a MOS FET are threshold voltage, breakdown voltage between drain and
source, total gate capacitance, on-resistance, and the current rating.
The EXT pin voltage swings between VDD and VSS. If VDD is low, a MOS FET of which the threshold voltage is low
enough so that the MOS FET is completely turned on must be used. If VDD is high, the breakdown voltage
between the gate and source must be higher by at least several volts.
During the step-up operation, voltage VOUT + VF is applied between the drain and source of the MOS FET. So the
breakdown voltage between the drain and source should be higher than the VOUT + VF voltage by at least several
volts.
The total gate capacitance and the on-resistance affect the efficiency.
The larger the total gate capacitance becomes and the higher the input voltage becomes, the more the power
dissipation for charging and discharging the gate capacitance by switching operation increases, and affects the
efficiency at low load current region. If the efficiency at low load is important, select MOS FETs with a small total
gate capacitance.
In the regions where the load current is high, the efficiency is affected by power dissipation caused by the
resistance of the MOS FETs. If the efficiency under heavy load is particularly important in the application, choose
MOS FETs which have an on-resistance as low as possible. As for the current rating, select a MOS FET whose
maximum continuous drain current rating is higher than IPK.
5. 2 Bipolar (NPN) Type
Figures 16 and 17 in “ Standard Circuits (2) Using Bipolar Transistors” show sample circuit diagrams using
Sanyo Electric Co., Ltd. 2SD1628G for the bipolar transistor (NPN). The driveability for increasing the output
current by means of a bipolar transistor depend on the hFE and Rb values of that bipolar transistor.
The Rb value is given by the following equation :
Rb=
Find the necessary base current (Ib) using the hFEvalue of the bipolar transistor by the equation, Ib IPK/hFE, and
select a smaller Rb value.
A small Rb value can increase the output current, but the efficiency decreases. A current may flow as the pulses or
voltage drops take place due to the wiring resistance or some other reason. Determine an optimum value through
experimentation.
In addition, if a speed-up capacitor (Cb) is inserted in parallel with the resistance (Rb) as shown in Figures 16 and
17, the switching loss will be reduced, leading to a higher efficiency.
Select a Cb value by using the following equation as a guide :
Cb 1
2Rfosc0.1
b
However, the optimum Cb value differs depending upon the characteristics of the bipolar transistor. Select a Cb
value after performing a thorough evaluation.
VDD 0.7
Ib
0.4
IEXTH
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
24
Standard Circuit
(1) Using MOS FET
Single ground
CS
RS
R2
R1
CC
VSS
VOUT
VOUT
SD
CL
ON/OFF
VDD
L
EXT
VIN
CVREF
CVREF
CSS
CSS
Nch Power
MOS FET
120 mV
RSENSE
SENSE
PW M comparator
V
REF
=1.0 V
Triangular wave
oscillation circuit
Phase
compensation
circuit
IC internal power
supply
Error am plifier
PWM, PWM/PFM
switching control
circuit
Shutdown
circuit
Soft-start
circuit
Voltage/current
reference
Figure 14 Output Voltage Fixed Output Type
CS
RS
RFB2
RFB1
CFB
VSS
VOUT
FB
SD
CL
ON/OFF
VDD
L
EXT
VIN
CVREF
CVREF
CSS
CSS
Nch Power
MOS FET
120 mV
RSENSE
SENSE
PW M comparator
V
REF
=1.0 V
Triangular wave
oscillation circuit
Phase
compensation
circuit
IC internal power
supply
Error am plifier
PWM, PWM/PFM
switching control
circuit
Shutdown
circuit
Soft-start
circuit
Voltage/current
reference
Single ground
Figure 15 Output Voltage External Setting Type
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
25
(2) Using Bipolar Transistor
CS
RS
R2
R1
CC
VSS
VOUT
VOUT
SD
CL
ON/OFF
VDD
L
EXT
VIN
CVREF
CVREF
CSS
CSS
NPN
Bipolar
Transistor
120 mV
RSENSE
SENSE
PW M comparator
V
REF
=1.0 V
Cb
Triangular wave
oscillation circuit
Phase
compensation
circuit
IC internal power
supply
Error am plifier
PWM, PWM/PFM
switching control
circuit
Shutdown
circuit
Soft-start
circuit
Voltage/current
reference
Single ground
Rb
Figure 16 Output Voltage Fixed Output Type
Cb
CS
RS
RFB2
RFB1
CFB
VSS
VOUT
FB
SD
CL
ON/OFF
VDD
L
EXT
VIN
CVREF
CVREF
CSS
CSS
NPN
Bipolar
Transistor
120 mV
RSENSE
SENSE
PW M comparator
V
REF
=1.0 V
Triangular wave
oscillation circuit
Phase
compensation
circuit
IC internal power
supply
Error amplifier
PWM, PWM/PFM
switching control
circuit
Shutdown
circuit
Soft-start
circuit
Voltage/current
reference
Single ground
Rb
Figure 17 Output Voltage External Setting Type
Caution The above connection and constant will not guarantee successful operation. Perform thorough
evaluation using the actual application to set the constant.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
26
Precautions
Mount the external capacitors, diode, coil, and other peripheral parts as close to the IC as possible, and make a one-
point grounding.
Characteristic ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows
at the time of a power supply injection. Because these largely depend on the coil, the capacitor and impedance of
power supply used, fully check them using an actually mounted model.
Make sure that dissipation of the switching transistor especially at high temperature will not surpass the power
dissipation of the package.
To stabilize operation, use a capacitor with a low ESR as a bypass capacitor between the VDD and VSS pins of the IC,
and install and wire it with a short distance and a low impedance. Connect CVREF to the VSS pin.
The main circuit of the IC operates on the internal power supply connected to the CVREF pin. CVREF is a bypass
capacitor that stabilizes the internal power supply. Use a 0.01 to 1 F ceramic capacitor as CVREF and install and wire
it to assure a short distance and a low impedance.
Switching regulator performance varies depending on the design of PC patterns, peripheral circuits and parts.
Thoroughly evaluate the actual device when setting. When using parts other than those which are recommended,
contact the ABLIC Inc. marketing department.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
ABLIC Inc. claims no responsibility for any disputes arising out of or in connection with any infringement by products
including this IC of patents owned by a third party.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
27
Characteristics
1. Examples of Major Characteristics (Typical Data)
(1) Current Consumption 1 (ISS1) vs. Supply Voltage (VDD)
S-8340A33A (fOSC : 600 kHz)
0
200
400
600
800
1000
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
ISS1 (A)
25°C
85°C
Ta 40°C
S-8340C33A (fOSC : 300 kHz)
0
100
200
300
400
500
600
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD
(
V)
25°C
85°C
Ta 40°C
ISS1 (A)
(2) Current Consumption 2 (ISS2) vs. Supply Voltage (VDD)
S-8340A33A (fOSC : 600 kHz)
0
50
100
150
200
250
300
2
.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD
(
V)
ISS2
(
A
)
25°C
85°C
T
a 40°C
S-8340C33A (fOSC : 300 kHz)
0
50
100
150
200
250
300
2
.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
2
5°C 85°C
Ta
40°C
ISS2
(
A
)
(3) Current Consumption at Shutdown (ISSS) vs. Supply Voltage (VDD)
0.0
0.2
0.4
0.6
0.8
1.0
2.5 3.0 3.5 4.0 4.5 5.0
5
.5 6.0
V
DD (V)
ISSS (
A
)
25°C
85°C
Ta 40°C
S-8340A33A (f
OSC
: 600 kHz) / S-8340C33A (f
OS
C
: 300 kHz)
(4) Oscillation Frequency (fOSC) vs. Supply Voltage (VDD)
S-8340A33A (fOSC : 600 kHz)
400
500
600
700
800
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
fOSC (kHz)
25°C
85°C
Ta 40°C
S-8340C33A (fOSC : 300 kHz)
200
250
300
350
400
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
fOSC (kHz)
25°C
85°C
Ta
40°C
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
28
(5) EXT Pin Output Current “H” (IEXTH) vs.
Supply Voltage (VDD)
(6) EXT Pin Output Current “L” (IEXTL) vs.
Supply Voltage (VDD)
60
50
40
30
20
10
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
IEX TH (mA)
25°C
85°C
Ta 40°C
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340 C3 3 A
(
f
OSC
: 300 kHz
)
0
20
40
60
80
100
120
140
2.5 3.0 3.5 4.0
4
.5 5.0 5.5 6.0
V
DD (V)
IEX TL (mA)
25°C 85°C
Ta
40°C
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340 C3 3 A
(
f
OSC
: 300 kHz
)
(7) Soft-Start Time (tSS) vs. Supply Voltage (VDD)
S-8340A33A (fOSC : 600 kHz)
0
5
10
15
20
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
D
D(V)
tSS (ms)
25°C
Ta 40°C
85°C
S-8340C33A (fOS C : 300 kHz)
0
10
20
30
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
D
D(V)
tSS (ms)
25°C
Ta 40°C
85°C
(8) ON/OFF Pin Input Voltage “H” (VSH) vs. Supply
Voltage (VDD)
(9) ON/OFF Pin Input Voltage “L” (VSL) vs. Supply
Voltage (VDD)
0.0
0.2
0.4
0.6
0.8
1.0
2.5 3.0 3.5 4.0
4
.5 5.0 5.5 6.0
V
DD (V)
VSH (V)
25°C
85°C
Ta 40°C
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340C33A
(
f
OSC
: 300 kHz
)
0.0
0.2
0.4
0.6
0.8
1.0
2.5 3.0 3.5 4.0
4
.5 5.0 5.5 6.0
V
DD (V)
VSL (V)
25°C
85°C
Ta 40°C
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340C33A
(
f
OSC
: 300 kHz
)
(10) Output Voltage (VOUT) vs. Supply Voltage (VDD)
2.40
2.42
2.44
2.46
2.48
2.50
2.52
2.54
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
VOUT (V)
25°C 85°C
Ta 40°C
S-8340A25A (f
OSC
: 600 kHz) / S-8340C25A (f
OS
C
: 300 kHz)
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
VOUT (V)
25°C 85°C
Ta 40°C
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340 C3 3 A
(
f
OSC
: 300 kHz
)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
29
4.90
4.92
4.94
4.96
4.98
5.00
5.02
5.04
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
VOUT (V)
25°C 85°C
Ta 40°C
S-8340A50A
(
f
OSC
: 600 kHz
)
/ S-8340C50A
(
f
OS
C
: 300 kHz
)
(11) Oscillation Start Voltage (VST) vs. Temperature (Ta) (12) Maximum Duty Ratio (MaxDuty) vs. Supply Voltage
(VDD)
0.4
0.5
0.6
0.7
0.8
0.9
1.0
40 20 0
2
0 40 60 80
Ta (°C)
VST (V)
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340C33
A
(
f
OS
C
:300 kHz
)
79
80
81
82
83
84
85
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
MaxDuty (%)
85°C
25°C
Ta 40°C
S-8340A33A
(
f
OS
C
: 600 kHz
)
/ S-8340C33A
(
f
OSC
: 300 kHz
)
(13) PWM/PFM Switching Duty Ratio (PFMDuty) vs. Supply Voltage (VDD)
S-8341A33A (fOSC : 600 kHz)
24
25
26
27
28
29
30
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
PFMDuty (%)
85°C 25°C
Ta 40°C
S-8341C33A (fOS C : 300 kHz)
18
19
20
21
22
23
24
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
PFMDuty (%)
85°C
25°C
Ta 40°C
(14) Current Limit Detection Ratio (VSENSE) vs. Supply Voltage (VDD)
105
110
115
120
125
130
135
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
DD (V)
VSENSE (mV)
85°C 25°C
Ta
40°C
S-8340A33A
(
f
OSC
: 600 kHz
)
/ S-8340C33
A
(
f
OSC
: 300 kHz
)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
30
2. Examples of Transient Response Characteristics
(1) Power-on (Typical Data)
S-8340A33AFT, fOSC = 600 kHz, Ta = 25C
VIN = 0 1.98 V, IOUT = 1 m
A
t (2 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
IN
(1 V/div)
VIN = 0 1.98 V, IOUT = 200 m
A
t (2 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
IN
(1 V/div)
S-8340C33AFT, fOSC = 300 kHz, Ta = 25C
I
t (4 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
IN
(1 V/div)
VIN = 0 1.98 V, IOUT = 1 m
A
t (4 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
IN
(1 V/div)
VIN = 0 1.98 V, IOUT = 200 m
A
(2) ON/OFF Pin Response (Typical Data)
S-8340A33AFT, fOSC = 600 kHz, Ta = 25C
t (2 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V ON/OFF
(1 V/div)
VON/OFF 0
1.98 V, IOU T = 1 m
A
t (2 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
ON/OFF
(1 V/div)
VON /OF F
0 1.98 V, IOUT = 200 m
A
S-8340C33AFT, fOSC = 300 kHz, Ta = 25C
t (4 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
ON/OFF
(1 V/div)
VON/OFF 0
1.98 V, IOU T = 1 m
A
t (4 ms/div)
V
OUT
(1 V/div)
3 V
0 V
3 V
0 V
V
ON/OFF
(1 V/div)
VON/OFF
0
1.98 V, IOU T = 200 m
A
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
31
(3) Load Fluctuations
S-8340A33AFT, fOSC = 600 kHz S-8340C33AFT, fOSC = 300 kHz
VIN = 1. 98 V, IOUT = 100 mA 100
A
t (4 ms/div)
V
OUT
(0.02 V/div)
100 mA
100
A
I
OUT
t (4 ms/div)
100 mA
100
A
I
OUT
V OUT
(
0.02 V/div)
VIN = 1. 98 V, IOUT = 100 mA 100
A
S-8340A33AFT, fOSC = 600 kHz S-8340C33AFT, fOSC = 300 kHz
t (0.2 ms/div)
V
OUT
(0.02 V/div)
100 mA
100
A
I
OUT
VIN = 1. 98 V, IOUT = 100 A 100 m
A
t (0.2 ms/div)
100 mA
100
A
I
OUT
V OUT
(
0.02 V/div)
VIN = 1. 98 V, IOUT = 100 A 100 m
A
(4) Input Voltage Fluctuations
S-8340A33AFT, fOSC = 600 kHz S-8340C33AFT, fOSC = 300 kHz
t (0.2 ms/div)
V
OUT
(0.02 V/div)
2.64 V
1.98 V
V
IN
(0.3 V/div)
VIN = 1.98 2.64 V, IOUT = 100 m
A
66
t (0.2 ms/div)
2.64 V
1.98 V
V
IN
(0.4 V/div)
V
OUT
(0.02 V/div)
VIN = 1.98 2.64 V, IOUT = 100 m
A
S-8340A33AFT, fOSC = 600 kHz S-8340C33AFT, fOSC = 300 kHz
t (0.2 ms/div)
2.64 V
1.98 V
V
IN
(0.3 V/div)
V
OUT
(0.02 V/div)
VIN = 2.64 1.98 V, IOUT = 100 m
A
t (0.2 ms/div)
2.64 V
1.98 V
V
IN
(0.4 V/div)
V
OUT
(0.02 V/div)
VIN = 2.64 1.98 V, IOUT = 100 m
A
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
32
Reference Data
Reference data are intended for use in selecting external parts to the IC. The information therefore provides
characteristic data in which external parts are selected with a view of wide variety of IC applications. All data shows
typical value.
1. External Parts for Reference Data
Table 10 External Parts List for Output Current vs. Efficiency, Output Current vs. Output Voltage
Characteristics Data for A Type
No. Product
Name
Output
Voltage Inductor Transistor Diode Output Capacitor
Sense
Resistor Application
(1) S-8340A25AFT 2.5 V CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1 0 *1
(2) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *2
(3) S-8341A25AFT CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1 *1
(4) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *2
(5) S-8340A33AFT 3.3 V CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1 *1
(6) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *2
(7) S-8341A33AFT CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1 *1
(8) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *2
(9) S-8340A50AFT 5.0 V CDRH5D18/4.1 H NDS335N RB491D F951A476MF1 1 *1
(10) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *2
(11) S-8341A50AFT CDRH5D18/4.1 H NDS335N RB491D F951A476MF1 1 *1
(12) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *2
*1. CDRH5D18 + NDS335N + RB491D: For small and thin parts of which height is 2 mm or shorter (The maximum current of
an external part should be set to 1.7 A.)
*2. CDRH124 + FTS2001 + RBO81L-20: For heavy load current (The maximum current of an external part should be set to
4.5 A.)
Table 11 External Parts List for Output Current vs. Efficiency, Output Current vs. Output Voltage
Characteristics Data for C Type
No. Product
Name
Output
Voltage Inductor Transistor Diode Output Capacitor
Sense
Resistor Application
(13) S-8340C25AFT 2.5 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 0 *3
(14) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *4
(15) S-8341C25AFT CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(16) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *4
(17) S-8340C33AFT 3.3 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(18) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *4
(19) S-8341C33AFT CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(20) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *4
(21) S-8340C50AFT 5.0 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(22) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *4
(23) S-8341C50AFT CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(24) CDRH124/10 H FTS2001 RBO81L20 F951C476MG1 2 *4
*3. CDRH6D28 + FDN335N + RB491D: For part height of 3 mm and high efficiency
*4. CDRH124 + FTS2001 + RBO81L-20: For optimizing the load current driveability
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
33
Table 12 External Parts List for Output Current vs. PFM/PWM Switching Input Voltage Characteristics
Data for A Type
No. Product
Name
Output
Voltage Inductor Transistor Diode Output Capacitor
Sense
Resistor Application
(25) S-8341A25AFT 2.5 V CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1 0 *1
(26) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *2
(27) S-8341A33AFT 3.3 V CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1 *1
(28) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *2
(29) S-8341A50AFT 5.0 V CDRH5D18/4.1 H NDS335N RB491D F951A476MF1 1 *1
(30) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *2
*1. CDRH5D18 + NDS335N + RB491D: For small and thin parts of which height is 2 mm or shorter (The maximum current of
an external part should be set to 1.7 A.)
*2. CDRH124 + FTS2001 + RBO81L-20: For heavy load current (The maximum current of an external part should be set to
4.5 A.)
Table 13 External Parts List for Output Current vs. PFM/PWM Switching Input Voltage Characteristics
Data for C Type
No. Product
Name
Output
Voltage Inductor Transistor Diode Output Capacitor
Sense
Resistor Application
(31) S-8341C25AFT 2.5 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 0 *3
(32) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *4
(33) S-8341C33AFT 3.3 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(34) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *4
(35) S-8341C50AFT 5.0 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1 *3
(36) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2 *4
*3. CDRH6D28 + FDN335N + RB491D: For part heights of 3 mm and high efficiency
*4. CDRH124 + FTS2001 + RBO81L-20: For optimizing the load current driveability
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
34
External Parts List for Ripple Data
Table 14 External Parts for Output Current vs. Ripple Voltage Characteristics Data for A Type
No. Product
Name
Output
Voltage Inductor Transistor Diode Output Capacitor
Sense
Resistor Application
(37) S-8340A25AFT 2.5 V CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1
F920J476MB3 2
0 *1
(38)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *2
(39) S-8341A25AFT CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1
F920J476MB3 2 *1
(40) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *2
(41) S-8340A33AFT 3.3 V CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1
F920J476MB3 2 *1
(42)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *2
(43) S-8341A33AFT CDRH5D18/4.1 H NDS335N RB491D F920J476MB3 1
F920J476MB3 2 *1
(44) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *2
(45) S-8340A50AFT 5.0 V CDRH5D18/4.1 H NDS335N RB491D F951A476MF1 1
F951A476MF1 2 *1
(46)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *2
(47) S-8341A50AFT CDRH5D18/4.1 H NDS335N RB491D F951A476MF1 1
F951A476MF1 2 *1
(48) CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *2
*1. CDRH5D18 + NDS335N + RB491D: For small and thin parts of which the height is 2 mm or shorter (The maximum
current of an external part should be set to 1.7 A.)
*2. CDRH124 + FTS2001 + RBO81L-20: For heavy load current (The maximum current of an external part should be set to
4.5 A.)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
35
Table 15 External Parts for Output Current vs. Ripple Voltage Characteristics Data for C Type
No. Product
Name
Output
Voltage Inductor Transistor Diode Output Capacitor
Sense
Resistor Application
(49) S-8340C25AFT 2.5 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1
F951C476MG1 2
0 *3
(50)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *4
(51) S-8341C25AFT CDRH6D28/10 H FDN335N RB491D F951C476MG1 1
F951C476MG1 2 *3
(52)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *4
(53) S-8340C33AFT 3.3 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1
F951C476MG1 2 *3
(54)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *4
(55) S-8341C33AFT CDRH6D28/10 H FDN335N RB491D F951C476MG1 1
F951C476MG1 2 *3
(56)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *4
(57) S-8340C50AFT 5.0 V CDRH6D28/10 H FDN335N RB491D F951C476MG1 1
F951C476MG1 2 *3
(58)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *4
(59) S-8341C50AFT CDRH6D28/10 H FDN335N RB491D F951C476MG1 1
F951C476MG1 2 *3
(60)
CDRH124/10 H FTS2001 RBO81L-20 F951C476MG1 2
F951A107MG1 2 *4
*3. CDRH6D28 + FDN335N + RB491D: For part heights of 3 mm and high efficiency
*4. CDRH124 + FTS2001 + RBO81L-20: For optimizing the load current driveability
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
36
Performance Data for Parts
The following shows the performance of external parts.
Table 16 Performance of External Parts
Component Product Name Manufacturer Performance
L DC resistance Max. Current Diameter Height
Inductor CDRH5D18
Sumida
Corporation 4.1 H0.042 typ.
0.057 max. 1.95 A
5.7 mm
typ.
6.0 mm
max.
1.8 mm
typ.
2.0 mm
max.
CDRH124
10 H 0.028 max. 4.5 A
12. 0 mm
typ.
12.3 mm
max.
4.5 mm
max.
CDRH6D28
10 H0.048 typ.
0.065 max. 1.70 A
6.7 mm
typ.
7.0 mm
max.
3.0 mm
max.
Diode
RB491D Rohm
Corporation Forward current 1.0 A @VF = 0.45 V, Vrm 25 V
RB081L20 Forward current 5.0 A @VF = 0.45 V, Vrm 25 V
Capacitor
(output
capacitance)
(tantalum
electrolytic
capacitor)
F951C476MG1 Nichicon
Corporation
47 F, 16 V, 5.5 4.8 2.3 mm max.,
ESR = 0.08 (nominal value)
F951A476MF1 47 F, 10 V, 5.5 4.8 2.0 mm max.,
ESR = 0.1 (nominal value)
F920J476MB3 47 F, 6.3 V, 3.6 3 1.2 mm max.,
ESR = 0.27 (nominal value)
F951A107MG1 100 F, 10 V, 5.5 4.8 2.3 mm max.,
ESR = 0.08 (nominal value)
External
transistor
(N-channel
FET)
NDS335N*1
Fairchild
Semiconductor
Corporation
VDSS = 20 V max., VGSS = 8 V max., ID = 1.7 A max.,
Vth = 0.5 V to 1 V, Ciss = 240 pF typ.,
RDS(ON) = 0.14 max.(VGS = 2.7 V), SOT-23-3 package or
equivalent
FDN335N
VDSS = 20 V max., VGSS = 8 V max., ID = 1.7 A max.,
Vth = 0.4 V to 1.5 V, Ciss = 310 pF typ.,
RDS(ON) = 0.10 max.(VGS = 2.5 V), SOT-23-3 package or
equivalent
FTS2001 Sanyo Electric
Co., Ltd.
VDSS = 20 V max., VGSS = 8 V max., ID = 5 A max.,
Vth = 0.4 V to 1.3 V, Ciss = 750 pF typ.,
RDS
(
ON
)
= 0.046 max.(VGS = 2.5 V), 8-Pin TSSOP package
*1. The manufacturer recommends the FDN335N as an alternative for the NDS335N.
Caution The value of each characteristic in Table 16 depends on the materials prepared by each manufacturer,
however, confirm the specifications by referring to respective materials when using any of the above.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
37
2. Output Current (IOUT) vs. Efficiency () Characteristics
The following shows the actual output current (IOUT) vs. efficiency () characteristics when the S-8340/8341 Series is
used under conditions (1) to (24) in Tables 10 and 11.
(1) S-8340A25AFT (2) S-8340A25AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOU T (mA)
η(%)
VIN
=1.2V 1.5V
1.8V
(CDRH5D18/4.1H, NDS335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
2.4V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
(3) S-8341A25AFT (4) S-8341A25AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
η(%)
VIN
=1.2V 1.5V
1.8V
IOUT (mA)
(CDRH5D18/4.1H, NDS335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η（%)
VIN
=1.5V 1.8V
2.4V
IOU T (mA)
(CDRH124/10H, FTS2001)
(5) S-8340A33AFT (6) S-8340A33AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
η(%)
VIN
=1.2V
3.0V
1.8V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
3.0V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
(7) S-8341A33AFT (8) S-8341A33AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
η(%)
VIN
=1.2V
3.0V
1.8V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
3.0V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
VIN 1.2 V
(CDRH5D18/4.1 H, NDS335N)
(%)
(%)
(%)
(%)
(%)
(%)
(%)
(%)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
(CDRH5D18/4.1 H, NDS335N)
(
CDRH124/10
H, FTS2001
)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
VIN 1.2 V VIN 1.5 V
VIN 1.2 V VIN 1.5 V
VIN 1.2 V
V
IN 1.2 V
VIN 1.5 V
VIN 1.5 V
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
38
(9) S-8340A50AFT (10) S-8340A50AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
η(%)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH124/10H, FTS2001)
(11) S-8341A50AFT (12) S-8341A50AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
η(%)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)IOU T (mA)
(CDRH124/10H, FTS2001)
(13) S-8340C25AFT (14) S-8340C25AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOU T (mA)
η(%)
VIN
=1.2V 1.5V
1.8V
(CDRH6D28/10H, FDN335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
2.4V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
(15) S-8341C25AFT (16) S-8341C25AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOU T (mA)
η(%)
VIN
=1.2V 1.5V
1.8V
(CDRH6D28/10H, FDN335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
2.4V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V VIN 1.8 V
VIN 1.2 V VIN 1.5 V
VIN 1.2 V VIN 1.5 V
(CDRH5D18/4.1 H, NDS335N)
IOUT (mA)
(CDRH124/10 H, FTS2001)
IOUT (mA)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
(%)
(%)
(%)
(%)
(%)
(%)
(%)
(%)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
39
(17) S-8340C33AFT (18) S-8340C33AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOU T (mA)
η(%)
VIN
=1.2V
3.0V
1.8V
(CDRH6D28/10H, FDN335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
3.0V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
(19) S-8341C33AFT (20) S-8341C33AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOU T (mA)
η(%)
VIN
=1.2V
3.0V
1.8V
(CDRH6D28/10H, FDN335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.5V
3.0V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
(21) S-8340C50AFT (22) S-8340C50AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOU T (mA)
η(%)
VIN
=1.8V
3.0V
4.5V
(CDRH6D28/10H, FDN335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH124/10H, FTS2001)
(23) S-8341C50AFT (24) S-8341C50AFT
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
IOUT (mA)
η(%)
VIN
=1.8V
3.0V
4.5V
(CDRH6D28/10H, FDN335N)
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000 10000
η(%)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH124/10H, FTS2001)
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V VIN 1.5 V
VIN 1.8 V VIN 1.8 V
VIN 1.8 V VIN 1.8 V
(CDRH6D28/10 H, FDNS335N)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
(%)
(%)
(%)
(%)
(%)
(%)
(%)
(%)
(CDRH124/10 H, FTS2001)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
40
3. Output Current (IOUT) vs. Output Voltage (VOUT) Characteristics
The following shows the actual output current (IOUT) vs. output voltage (VOUT) characteristics when the S-8340/8341
Series is used under conditions (1) to (24) in Tables 10 and 11.
(1) S-8340A25AFT (2) S-8340A25AFT
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.2V
1.8V
1.5V
IOUT (mA)
(CDRH5D18/4.1H, NDS335N)
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.5V
2.4V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
(3) S-8341A25AFT (4) S-8341A25AFT
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.2V
1.8V
1.5V
IOUT (mA)
(CDRH5D18/4.1H, NDS335N)
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.5V
2.4V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
(5) S-8340A33AFT (6) S-8340A33AFT
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000
V(V)
VIN
=1.2V
3.0V
1.8V
IOUT (mA)
(CDRH5D18/4.1H, NDS335N)
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000 10000
V(V)
VIN
=1.5V
3.0V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
(7) S-8341A33AFT (8) S-8341A33AFT
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000
V(V)
VIN
=1.2V
3.0V
1.8V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000 10000
V(V)
VIN
=1.5V
3.0V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V) VOUT (V)
VOUT (V)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
(
CDRH5D18/4.1
H, NDS335N
)
(CDRH124/10 H, FTS2001)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V VIN 1.5 V
VIN 1.2 V VIN 1.5 V
IOUT (mA) IOUT (mA)
VIN 1.2 V VIN
1.5 V
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
41
(9) S-8340A50AFT (10) S-8340A50AFT
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000
V(V)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000 10000
V(V)
VIN
=1.8V
4.5V
3.0V
IOUT (mA)
(CDRH124/10H, FTS2001)
(11) S-8341A50AFT (12) S-8341A50AFT
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000
V(V)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000 10000
V(V)
VIN
=1.8V
4.5V
3.0V
IOUT (mA)
(CDRH124/10H, FTS2001)
(13) S-8340C25AFT (14) S-8340C25AFT
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.2V
1.8V
1.5V
IOU T (mA)
(CDRH6D28/10H, FDN335N)
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.5V
2.4V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
(15) S-8341C25AFT (16) S-8341C25AFT
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.2V
1.8V
1.5V
IOU T (mA)
(CDRH6D28/10H, FDN335N)
2.46
2.48
2.50
2.52
2.54
2.56
2.58
2.60
2.62
0.1 1 10 100 1000
V(V)
VIN
=1.5V
2.4V
1.8V
IOU T (mA)
(CDRH124/10H, FTS2001)
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V VIN 1.8 V
VIN 1.2 V VIN 1.5 V
VIN 1.2 V VIN 1.5 V
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
IOUT (mA)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDNS335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDNS335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
IOUT (mA)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
42
(17) S-8340C33AFT (18) S-8340C33AFT
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000
V(V)
VIN
=1.2V
3.0V
1.8V
IOU T (mA)
(CDRH6D28/10H, FDN335N)
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000 10000
V(V)
VIN
=1.5V
3.0V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
(19) S-8341C33AFT (20) S-8341C33AFT
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000
V(V)
VIN
=1.2V
3.0V
1.8V
IOU T (mA)
(CDRH6D28/10H, FDN335N)
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
0.1 1 10 100 1000 10000
V(V)
VIN
=1.5V
3.0V
1.8V
IOUT (mA)
(CDRH124/10H, FTS2001)
(21) S-8340C50AFT (22) S-8340C50AFT
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000
V(V)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH6D28/10H, FDN335N)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000 10000
V(V)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH124/10H, FTS2001)
(23) S-8341C50AFT (24) S-8341C50AFT
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000
V(V)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH6D28/10H, FDN335N)
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
0.1 1 10 100 1000 10000
V(V)
VIN
=1.8V
4.5V
3.0V
IOU T (mA)
(CDRH124/10H, FTS2001)
VIN 1.2 V VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.8 V VIN 1.8 V
VIN 1.8 V VIN 1.8 V
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
VOUT (V)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
IOUT (mA)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N) (CDRH124/10 H, FTS2001)
IOUT (mA)
IOUT (mA)
IOUT (mA)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
43
4. Output Current (IOUT) vs. PFM/PWM Switching Input Voltage (VIN) Characteristics
The following shows the actual output current (IOUT) vs. PFM/PWM switching input voltage (VIN) characteristics when
the S-8341 Series is used under conditions (25) to (36) in Tables 12 and 13.
(25) S-8341A25AFT (26) S-8341A25AFT
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1 10 100 1000
IOUT (mA)
(CDRH5D18/4.1H, NDS335N)
PFM
PWM
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
110100
IOUT (mA)
(CDRH124/10H, FTS2001)
PFM
PWM
(27) S-8341A33AFT (28) S-8341A33AFT
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
PFM
PWM
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1 10 100 1000
IOUT (mA)
(CDRH124/10H, FTS2001)
PFM
PWM
(29) S-8341A50AFT (30) S-8341A50AFT
V(V)
0.0
1.0
2.0
3.0
4.0
5.0
0.1 1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N)
PFM
PWM
V(V)
0.0
1.0
2.0
3.0
4.0
5.0
1 10 100 1000
IOUT (mA)
(CDRH124/10H, FTS2001)
PFM
PWM
(31) S-8341C25AFT (32) S-8341C25AFT
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
110100
IOU T (mA)
(CDRH6D28/10H, FDN335N)
PFM
PWM
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
110100
IOUT (mA)
(CDRH124/10H, FTS2001)
PFM
PWM
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
(CDRH5D18/4.1 H, NDS335N) (CDRH124/10 H, FTS2001)
(CDRH5D18/4.1 H, NDS335N)
(CDRH6D28/10 H, NDS335N) (CDRH124/10 H, FTS2001)
(CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
VIN (V)
VIN (V)
VIN (V)
VIN (V)
VIN (V)
VIN (V)
VIN (V)
VIN (V)
IOUT (mA) IOUT (mA)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
44
(33) S-8341C33AFT (34) S-8341C33AFT
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N)
PFM
PWM
V(V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
110100
IOUT (mA)
(CDRH124/10H, FTS2001)
PFM
PWM
(35) S-8341C50AFT (36) S-8341C50AFT
V(V)
0.0
1.0
2.0
3.0
4.0
5.0
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N)
PFM
PWM
V(V)
0.0
1.0
2.0
3.0
4.0
5.0
1 10 100 1000
IOUT (mA)
(CDRH124/10H, FTS2001)
PFM
PWM
VIN (V)
VIN (V)
VIN (V)
VIN (V)
(CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N)
(CDRH124/10 H, FTS2001)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
45
5. Output Current (IOUT) vs. Ripple Voltage (Ripple) Characteristics
The following shows the actual output current (IOUT) vs. ripple voltage (Ripple) characteristics when the S-8340/8341
Series is used under conditions (37) to (60) in Tables 14 and 15.
(37) S-8340A25AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOUT (mA)
(CDRH5D18/4.1
H, NDS335N,47
F)
VIN=1.2V
1.5V
1.8V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOUT (mA)
(CDRH5D18/4.1
H,NDS335N,47
F
2)
VIN=1.2V
1.5V
1.8V
(38) S-8340A25AFT
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOUT (mA)
(CDRH124/10H,FTS2001,47F2)
1.8V
VIN
=1.5V
2.4V
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H,FTS2001,100F2)
2.4V
VIN
=1.5
V
1.8V
(39) S-8341A25AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F)
1.8V
1.5V
VIN
=1.2
V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOUT (mA)
(CDRH5D18/4.1H, NDS335N,47F2)
1.8V
1.5V
VIN
=1.2V
(40) S-8341A25AFT
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOUT (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5
V
2.4V
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H,FTS2001,100F2)
1.8V
VIN
=1.5V
2.4V
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
(CDRH5D18/4.1 H, NDS335N, 47 F)
Ripple (mV)
(CDRH124/10 H, FTS2000, 47 F 2) (CDRH5D18/4.1 H, NDS335N, 47 F 2)
(CDRH5D18/4.1 H, NDS335N, 47 F 2)
(CDRH5D18/4.1 H, NDS335N, 47 F)
VIN 1.2 V
VIN 1.2 V
VIN 1.5 V
VIN 1.5 V
VIN 1.5 V
VIN 1.5 V
VIN 1.2 V
VIN 1.2 V
(CDRH5D18/4.1 H, NDS335N, 47 F 2)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA) IOUT (mA)
IOUT (mA)
IOUT (mA)
IOUT (mA)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
46
(41) S-8340A33AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F)
1.8V
VIN
=1.2
V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F2)
1.8V
VIN
=1.2V
3.0V
(42) S-8340A33AFT
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5V
3.0V
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
1.8V
VIN
=1.5V
3.0V
(43) S-8341A33AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F)
1.8V
VIN
=1.2V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H,NDS335N,47F2)
1.8V
VIN
=1.2V
3.0V
(44) S-8341A33AFT
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5
V
3.0V
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H,FTS2001,100F2)
1.8V
VIN
=1.5V
3.0V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
(CDRH5D18/4.1 H, NDS335N, 47 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
(CDRH5D18/4.1 H, NDS335N, 47 F 2)
IOUT (mA) IOUT (mA)
(CDRH5D18/4.1 H, NDS335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
(CDRH5D18/4.1 H, NDS335N, 47 F)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
47
(45) S-8340A50AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F)
VIN
=1.8V
4.5V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H,NDS335N,47F2)
VIN
=1.8V
4.5V
3.0V
(46) S-8340A50AFT
Ripple(mV)
0
50
100
150
200
250
300
350
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
VIN
=1.8V 4.5V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
350
10 100 1000 10000
IOU T (mA)
(CDRH124/10H,FTS2001,100F2)
VIN
=1.8
V
4.5V
3.0V
(47) S-8341A50AFT
Ripple(mV)
0
50
100
150
200
250
300
350
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F)
VIN
=1.8V
4.5V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
350
1 10 100 1000
IOU T (mA)
(CDRH5D18/4.1H, NDS335N,47F2)
VIN
=1.8V 4.5V
3.0
V
(48) S-8341A50AFT
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
VIN
=1.8V
4.5V
3.0V
Ripple(mV)
0
100
200
300
400
500
600
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
VIN
=1.8V
4.5V
3.0V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
(CDRH5D18/4.1 H, NDS335N, 47 F 2)
IOUT (mA) IOUT (mA)
(CDRH5D18/4.1 H, NDS335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
(CDRH5D18/4.1 H, NDS335N, 47 F 2)
IOUT (mA) IOUT (mA)
(CDRH5D18/4.1 H, NDS335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
48
(49) S-8340C25AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,47F)
VIN
=1.2V
1.5V
1.8V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,100F)
VIN
=1.2V
1.5V
1.8V
(50) S-8340C25AFT
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5V
2.4V
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
2.4V
VIN
=1.5V
1.8V
(51) S-8341C25AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,47F)
1.8V
1.5V
VIN
=1.2V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,100F)
1.8V
1.5V
VIN
=1.2V
(52) S-8341C25AFT
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5
V
2.4V
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
1.8V
VIN
=1.5V 2.4V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
(CDRH6D28/10 H, FDN335N, 100 F)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
CDRH6D28/10 H, FDN335N, 100 F)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02 S-8340/8341 Series
49
(53) S-8340C33AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,47F)
1.8V
VIN
=1.2V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,100F)
1.8V
VIN
=1.2V
3.0V
(54) S-8340C33AFT
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5V
3.0V
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
1.8V
VIN
=1.5V 3.0V
(55) S-8341C33AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,47F)
1.8V
VIN
=1.2V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,100F)
1.8
V
VIN
=1.2V
3.0V
(56) S-8341C33AFT
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
1.8V
VIN
=1.5V
3.0V
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
1.8V
VIN
=1.5V
3.0V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
VIN 1.2 V
VIN 1.5 V
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
(CDRH6D28/10 H, FDN335N, 100 F)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
(CDRH6D28/10 H, FDN335N, 100 F)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8340/8341 Series Rev.4.0_02
50
(57) S-8340C50AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,47F)
VIN
=1.8V
4.5V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,100F)
VIN
=1.8V
4.5V
3.0V
(58) S-8340C50AFT
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
VIN
=1.8
V
4.5V
3.0V
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
VIN
=1.8V 4.5V
3.0V
(59) S-8341C50AFT
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,47F)
VIN
=1.8V
4.5V
3.0V
Ripple(mV)
0
50
100
150
200
250
300
1 10 100 1000
IOU T (mA)
(CDRH6D28/10H, FDN335N,100F)
VIN
=1.8V
4.5V
3.0
V
(60) S-8341C50AFT
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,47F2)
VIN
=1.8V
4.5V
3.0V
Ripple(mV)
0
100
200
300
400
500
10 100 1000 10000
IOU T (mA)
(CDRH124/10H, FTS2001,100F2)
VIN
=1.8V
4.5V
3.0V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
VIN 1.8 V
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
Ripple (mV)
(CDRH6D28/10 H, FDN335N, 100 F)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
(CDRH6D28/10 H, FDN335N, 100 F)
IOUT (mA) IOUT (mA)
(CDRH6D28/10 H, FDN335N, 47 F)
(CDRH124/10 H, FTS2001, 100 F 2)
IOUT (mA) IOUT (mA)
(CDRH124/10 H, FTS2001, 47 F 2)
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
TSSOP8-E-PKG Dimensions
No. FT008-A-P-SD-1.2
FT008-A-P-SD-1.2
0.17±0.05
3.00 +0.3
-0.2
0.65
0.2±0.1
14
5
8
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
ø1.55±0.05
2.0±0.05
8.0±0.1 ø1.55 +0.1
-0.05
(4.4)
0.3±0.05
1
45
8
4.0±0.1
Feed direction
TSSOP8-E-Carrier Tape
No. FT008-E-C-SD-1.0
FT008-E-C-SD-1.0
+0.4
-0.2
6.6
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
Enlarged drawing in the central part
No. FT008-E-R-SD-1.0
2±0.5
ø13±0.5
ø21±0.8
13.4±1.0
17.5±1.0
3,000
QTY.
TSSOP8-E-Reel
FT008-E-R-SD-1.0
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
Enlarged drawing in the central part
2±0.5
ø13±0.5
ø21±0.8
13.4±1.0
17.5±1.0
4,000
QTY.
TSSOP8-E-Reel
FT008-E-R-S1-1.0
mm
No. FT008-E-R-S1-1.0
Disclaimers (Handling Precautions)
1. All the information described herein
(product data,
specifications,
figures,
tables,
programs,
algorithms and application
circuit examples,
etc.)
is current as of publishing date of this document and is subject to change without notice.
2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
ABLIC Inc. is not responsible for damages caused by the reasons other than the products described herein
(hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use
of the information described herein.
3. ABLIC Inc. is not responsible for damages caused by the incorrect information described herein.
4. Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings,
operation voltage range and electrical characteristics, etc.
ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the
products outside their specified ranges.
5. When using the products, confirm their applications, and the laws and regulations of the region or country where they
are used and verify suitability, safety and other factors for the intended use.
6. When exporting the products, comply with the Foreign Exchange and Foreign Trade Act and all other export-related
laws, and follow the required procedures.
7. The products must not be used or provided (exported) for the purposes of the development of weapons of mass
destruction or military use. ABLIC Inc. is not responsible for any provision (export) to those whose purpose is to
develop, manufacture, use or store nuclear, biological or chemical weapons, missiles, or other military use.
8. The products are not designed to be used as part of any device or equipment that may affect the human body, human
life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control
systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment,
aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses. Do
not apply the products to the above listed devices and equipments without prior written permission by ABLIC Inc.
Especially, the products cannot be used for life support devices, devices implanted in the human body and devices
that directly affect human life, etc.
Prior consultation with our sales office is required when considering the above uses.
ABLIC Inc. is not responsible for damages caused by unauthorized or unspecified use of our products.
9. Semiconductor products may fail or malfunction with some probability.
The user of the products should therefore take responsibility to give thorough consideration to safety design including
redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or
death, fires and social damage, etc. that may ensue from the products' failure or malfunction.
The entire system must be sufficiently evaluated and applied on customer's own responsibility.
10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the
product design by the customer depending on the intended use.
11. The products do not affect human health under normal use. However, they contain chemical substances and heavy
metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Be
careful when handling these with the bare hands to prevent injuries, etc.
12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used.
13. The information described herein contains copyright information and know-how of ABLIC Inc.
The information described herein does not convey any license under any intellectual property rights or any other
rights belonging to ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any
part of this document described herein for the purpose of disclosing it to a third-party without the express permission
of ABLIC Inc. is strictly prohibited.
14. For more details on the information described herein, contact our sales office.
2.0-2018.01
www.ablicinc.com
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
ABLIC:
S-8341A25AFT-T2-G S-8340A25AFT-T2-G S-8340A30AFT-T2-G S-8340A50AFT-T2-G S-8340C30AFT-T2-G S-
8341C30AFT-T2-G S-8341A50AFT-T2-G S-8340D00AFT-T2-G S-8341D00AFT-T2-G S-8341A30AFT-T2-G S-
8341A33AFT-T2-G S-8340C50AFT-T2-G S-8341C50AFT-T2-G S-8340B00AFT-T2-G S-8341B00AFT-T2-G S-
8341C25AFT-T2-G S-8340C25AFT-T2-G S-8340A33AFT-T2-G S-8340C33AFT-T2-G S-8341C33AFT-T2-G S-
8341A33AFT-T2-U S-8341C25AFT-T2-U S-8340C25AFT-T2-U S-8341C50AFT-T2-U S-8341A50AFT-T2-U S-
8340A30AFT-T2-U S-8340A33AFT-T2-U S-8340A35AFT-T2-U S-8341C51AFT-T2-U S-8341A30AFT-T2-U S-
8341A25AFT-T2-U S-8340A50AFT-T2-U S-8341C30AFT-T2-U S-8340D00AFT-T2-U S-8340A60AFT-T2-U S-
8340A51AFT-T2-U S-8340C50AFT-T2-U S-8341B00AFT-T2-U S-8341D00AFT-T2-U S-8340A25AFT-T2-U S-
8340A56AFT-T2-U S-8340C33AFT-T2-U S-8341C33AFT-T2-U S-8340C30AFT-T2-U S-8340B00AFT-T2-U S-
8340C60AFT-T2-U S-8340A34AFT-T2-U
Seiko Instruments:
S-8340A56AFT-T2-G S-8340A60AFT-T2-G S-8340C60AFT-T2-G S-8340A34AFT-T2-G S-8340A35AFT-T2-G S-
8340A51AFT-T2-G S-8341C51AFT-T2-G