S-8353/8354 Series
www.sii-ic.com
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE
BUILT-IN TRANSISTOR SWITCHING REGULATOR
© Seiko Instruments Inc., 2002-2010 Rev.3.0_00
Seiko Instruments Inc. 1
The S-8353/8354 Series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an
oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8353 Series)
and a PWM / PFM switching control circuit (S-8354 Series).
The S-8353/8354 Series can configure the step-up switching regulator with an external coil, capacitor, and diode. In
addition to the above features, the small package and low current consumption make the S-8353/8354 Series ideal for
portable equipment applications requiring high efficiency.
The S-8353 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM control circuit
whose duty ratio can be varied linearly from 0% to 83% (from 0% to 78% for 250 kHz models), an excellently designed error
amplifier, and phase compensation circuits.
The S-8354 Series features a PWM / PFM switching controller that can switch the operation to a PF M controller with a duty
ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current.
Features
• Low voltage operation: Startup at 0.9 V min. (IOUT = 1 mA) guaranteed
• Low current consumption : During operation 18.7 μA (3.3 V, 50 kHz, typ.)
During shutdown: 0.5 μA (max.)
• Duty ratio : Built-in PWM / PFM switching control circuit (S-8354 Series)
15 % to 83 % (30 kHz and 50 kHz models)
15 % to 78 % (250 kHz models)
• External parts : Coil, capacitor, and diode
• Output voltage : Selectable in 0.1 V steps between 1.5 V and 6.5 V (for VDD / VOUT separate types)
Selectable in 0.1 V steps between 2.0 V and 6.5 V (for other than VDD / VOUT separate types)
• Output voltage accuracy : ±2.4%
• Oscillation frequency : 30 kHz, 50 kHz, and 250 kHz selectable
• Soft start function : 6 ms (50 kHz, typ.)
• Lead-free, Sn 100%, halogen-free*1
*1. Refer to “ Product Name Structure” for details.
Applications
• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs
• Power supplies for audio equipment such as portable CD / MD players
• Constant voltage power supplies for cameras, VCRs, and communication devices
• Power supplies for microcomputers
Packages
• SOT-23-3
• SOT-23-5
• SOT-89-3
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
2
Block Diagrams
(1) A, C and H Types (Without Shutdown Function)
CONT VOUT
Oscillation circuit
PWMcontro l ci rcuit
or PWM / PFM
swiching control
circuit
VSS
Phase
compensation
circuit
Soft start bu ilt-in
reference power
supply
IC internal
power supply
+
−
Figure 1
(2) A and H Types (With Shutdow n Function)
CONT VOUT
Oscillation circuit
PWMcont rol ci rcuit
or PWM / PFM
swiching control
circuit
VSS
OFF/ON
Soft start bu ilt-in
reference power
supply
Phase
compensation
circuit
IC internal
power supply
+
−
Figure 2
(3) D and J Types (VDD / VOUT Separate Type)
CONT VOUTVDD
Oscillation circuit
PWMcont rol ci rcuit
or PWM / PFM
swiching control
circuit
VSS
IC internal
power supply
Soft start bu ilt-in
reference power
supply
Phase
compensation
circuit
+
−
Figure 3
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 3
Product Name Structure
The control system, product types, output voltage, and packages for the S-8353/8354 Series can be selected at the
user’s request. Please refer to the “3. Product Name” for the definition of the product name, “4. Package” regarding
the package drawings and “5. Product Name List” for the full product names.
1. Function List
(1) PWM Control Products
Table 1
Product Name Switching
Frequency
[kHz]
Shutdown
Function
VDD / VOUT
Separate
Typ e Package Application
S-8353AxxMC 50 Yes − SOT-23-5 Applications requiring shutdown function
S-8353AxxMA 50 − − SOT-23-3 Applications not requiring shutdow n function
S-8353AxxUA 50 − − SOT-89-3 Applications not requiring shutdow n function
S-8353CxxMA 30 − − SOT-23-3 For pager
S-8353CxxUA 30 − − SOT-89-3 For pager
S-8353DxxMC 50 − Yes SOT-23-5
Applications requiring variable output voltage
with an external resistor
S-8353HxxMC 250 Yes − SOT-23-5
Applications requiring a shutdown function
and a thin coil
S-8353HxxMA 250 − − SOT-23-3
Applications not requiring a shutdown function
and requiring a thin coil
S-8353HxxUA 250 − − SOT-89-3
Applications not requiring a shutdown function
and requiring a thin coil
S-8353JxxMC 250 − Yes SOT-23-5
Applications requiring variable output voltage
with an external resistor and a thin coil
(2) PWM / PFM Switching Control Products
Table 2
Product Name Switching
Frequency
[kHz]
Shutdown
Function
VDD / VOUT
Separate
Typ e Package Application
S-8354AxxMC 50 Yes − SOT-23-5 Applications requiring shutdown function
S-8354AxxMA 50 − − SOT-23-3 Applications not requiring shutdow n function
S-8354AxxUA 50 − − SOT-89-3 Applications not requiring shutdow n function
S-8354CxxMA 30 − − SOT-23-3 For pager
S-8354DxxMC 50 − Yes SOT-23-5
Applications requiring variable output voltage
with an external resistor
S-8354HxxMC 250 Yes − SOT-23-5
Applications requiring a shutdown function
and a thin coil
S-8354HxxMA 250 − − SOT-23-3
Applications not requiring a shutdown function
and requiring a thin coil
S-8354HxxUA 250 − − SOT-89-3
Applications not requiring a shutdown function
and requiring a thin coil
S-8354JxxMC 250 − Yes SOT-23-5
Applications requiring variable output voltage
with an external resistor and a thin coil
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
4
2. Package and Function List by Product Type
Table 3
Series Name Type Package Name
(Abbreviation) Shutdown Function
Yes / No VDD / VOUT Separate Type
Yes / No
MC Yes A (Normal product or with shutdow n function)
A = 50 kHz MA / UA No No
C (Normal product)
C = 30 kHz MA No No
D (VDD / VOUT separate type)
D = 50 kHz MC No Yes
MC Yes
H (Normal product or with shutdow n
function)
H = 250 kHz MA / UA No No
S-8353 Series,
S-8354 Series
J (VDD / VOUT separate type)
J = 250 kHz MC No Yes
3. Product Name
(1) SOT-23-3
S-835 x x xx MA - xxx xx x Environmental code
U : Lead-f re e ( S n 10 0%), halogen- fr ee
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications *1
T1 : Product of environmental code = U
T2 : Product of environmental code = G
Product code *2
Package code
MA : SOT-23-3
Output vo ltage
15 to 65
(e.g. When the output voltage is 1.5 V, it is expressed as 15. )
Product type
A : Normal products (SOT-23-3, SO T-89-3)
or With shutdo wn function pr odu cts (SOT -23-5), fOSC = 50 kHz
C : Normal products, fOSC = 30 kHz
D : VDD / VOUT separate type, fOSC = 50 kHz
H : Normal products (SOT-23-3, SOT-89-3)
or With shutdo wn function pr odu cts (SOT -23-5), fOSC = 250 kHz
J : VDD / VOUT separate type, fOSC = 250 kHz
Control system
3 : PWM cont rol
4 : PWM / PFM switching control
*1. Refer to the tape specifications.
*2. Refer to the Table 4 to Table 8 in the “5. Product Name List”.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 5
(2) SOT-23-5, SOT-89-3
S-835 x x xx xx - xxx T2 x Environm ental code
U : Lead-free (Sn 100%), halogen-fr ee
G : Lead-free (for details, please contac t ou r sales office)
IC direction in tape specifications *1
Product code *2
Package co de
MC : SOT-23-5
UA : SOT-89-3
Output voltage
15 to 65
(e.g. When the ou tp ut volt age is 1.5 V , it is expr es sed as 15 .)
Product type
A : Normal products (SOT-23-3, SOT-89-3)
or With shut down funct ion products (SOT-23- 5), fOSC = 50 kHz
C : Normal products, fOSC = 30 kHz
D : VDD / VOUT separate type, fOSC = 50 k H z
H : Normal products (SOT-23-3, SOT-89-3)
or With shut down funct ion products (SOT-23- 5), fOSC = 250 kHz
J : VDD / VOUT separate type, fOSC = 250 kHz
Control system
3 : PWM control
4 : PWM / PFM switching control
*1. Refer to the tape specifications.
*2. Refer to the Table 4 to Table 8 in the “5. Product Name List”.
4. Package
Drawing Code
Package Name Package Tape Reel
Environmental code = G MP003-A-P-SD MP003-A-C-SD MP003-A-R-SD
SOT-23-3 Environmental code = U MP003-C-P-SD MP003-C-C-SD MP003-Z-R-SD
SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD
SOT-89-3 UP003-A-P-SD UP003-A-C-SD UP003-A-R-SD
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
6
5. Product Name List
(1) S-8353 Series
Table 4
Output
voltage S-8353AxxMC
Series S-8353AxxMA
Series S-8353AxxUA
Series S-8353CxxMA
Series
2.0 V S-8353A20MC-IQFT2x − − −
2.5 V S-8353A25MC-IQKT2x − − −
2.7 V S-8353A27MC-IQMT2x − − −
2.8 V S-8353A28MC-IQNT2x − − −
3.0 V S-8353A30MC-IQPT2x S-8353A30MA-IQPT S-8353A30UA-IQPT2x S-8353C30MA-ISPT
3.3 V S-8353A33MC-IQST2x S-8353A33MA-IQST S-8353A33UA-IQST2x −
3.5 V S-8353A35MC-IQUT2x − − −
3.6 V − − S-8353A36UA-IQVT2x −
3.8 V S-8353A38MC-IQXT2x − S-8353A38UA-IQXT2x −
4.0 V − − S-8353A40UA-IQZT2x −
4.5 V S-8353A45MC-IRET2x − − −
4.6 V − − − S-8353C46MA-ITFT
5.0 V S-8353A50MC-IRJT2x S-8353A50MA-IRJT S-8353A50UA-IRJT2x −
5.5 V S-8353A55MC-IROT2x − S-8353A55UA-IROT2x −
Table 5
Output
voltage S-8353CxxUA
Series S-8353DxxMC
Series S-8353HxxMC
Series S-8353HxxMA
Series
2.0 V − S-8353D20MC-IUFT2x S-8353H20MC-IWFT2x −
2.6 V − − S-8353H26MC-IWLT2x −
2.8 V − − S-8353H28MC-IWNT2x −
3.0 V S-8353C30UA-ISPT2x S-8353D30MC-IUPT2x S-8353H30MC-IWPT2x S-8353H30MA-IWPT
3.1 V − − S-8353H31MC-IWQT2x −
3.2 V − − S-8353H32MC-IWRT2x −
3.3 V − − S-8353H33MC-IWST2x S-8353H33MA-IWST
3.5 V − − S-8353H35MC-IWUT2x −
3.7 V − − S-8353H37MC-IWWT2x −
3.8 V − − S-8353H38MC-IWXT2x −
4.0 V − − S-8353H40MC-IWZT2x −
4.5 V − − S-8353H45MC-IXET2x −
5.0 V − S-8353D50MC-IVJT2x S-8353H50MC-IXJT2x −
6.0 V − − S-8353H60MC-IXTT2x −
6.5 V − − S-8353H65MC-IXYT2x −
Remark 1. Please contact the SII marketing department for products with an output voltage other than those specified above.
2. x: G or U
3. : 2G or 1U
4. Please select products of environmental code = U for Sn 100%, halogen-free products.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 7
Table 6
Output
voltage S-8353HxxUA
Series S-8353JxxMC
Series
1.8 V − S-8353J18MC-IYDT2x
2.0 V − S-8353J20MC-IYFT2x
2.1 V − S-8353J21MC-IYGT2x
2.5 V − S-8353J25MC-IYKT2x
3.0 V − S-8353J30MC-IYPT2x
3.3 V S-8353H33UA-IWST2x S-8353J33MC-IYST2x
3.6 V S-8353H36UA-IWVT2x −
5.0 V S-8353H50UA-IXJT2x S-8353J50MC-IZJT2x
(2) S-8354 Series
Table 7
Output
voltage S-8354AxxMC
Series S-8354AxxMA
Series S-8354AxxUA
Series S-8354CxxMA
Series
2.0 V − S-8354A20MA-JQFT − −
2.7 V S-8354A27MC-JQMT2x S-8354A27MA-JQMT − −
2.8 V − S-8354A28MA-JQNT S-8354A28UA-JQNT2x −
3.0 V S-8354A30MC-JQPT2x S-8354A30MA-JQPT S-8354A30UA-JQPT2x S-8354C30MA-JSPT
3.3 V S-8354A33MC-JQST2x S-8354A33MA-JQST S-8354A33UA-JQST2x −
3.5 V − − S-8354A35UA-JQUT2x −
3.8 V S-8354A38MC-JQXT2x − − −
4.0 V S-8354A40MC-JQZT2x − S-8354A40UA-JQZT2x −
5.0 V S-8354A50MC-JRJT2x S-8354A50MA-JRJT S-8354A50UA-JRJT2x −
Table 8
Output
voltage S-8354DxxMC
Series S-8354HxxMC
Series S-8354HxxUA
Series S-8354JxxMC
Series
1.5 V − − − S-8354J15MC-JYAT2x
2.0 V S-8354D20MC-JUFT2x − − S-8354J20MC-JYFT2x
2.5 V − S-8354H25MC-JWKT2x − −
2.7V − S-8354H27MC-JWMT2x S-8354H27UA-JWMT2x −
3.0 V S-8354D30MC-JUPT2x S-8354H30MC-JWPT2x − S-8354J30MC-JYPT2x
3.1 V − S-8354H31MC-JWQT2x − −
3.3 V S-8354D33MC-JUST2x S-8354H33MC-JWST2x − S-8354J33MC-JYST2x
3.5 V − S-8354H35MC-JWUT2x − −
4.0 V − S-8354H40MC-JWZT2x − −
4.2 V − S-8354H42MC-JXBT2x − −
4.5 V − S-8354H45MC-JXET2x − −
4.7 V − S-8354H47MC-JXGT2x − −
5.0 V − S-8354H50MC-JXJT2x − S-8354J50MC-JZJT2x
Remark 1. Please contact the SII marketing department for products with an output voltage other than those specified above.
2. x: G or U
3. : 2G or 1U
4. Please select products of environmental code = U for Sn 100%, halogen-free products.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
8
Pin Configurations
Table 9
A, C and H Types
(Without shutdown function, VDD / VOUT non-separate type)
Pin No. Symbol Description
1 VOUT Output voltage pin and IC power supply pin
2 VSS GND pin
3 CONT External inductor connection pin
1
2 3
SOT-23-3
Top view
Figure 4
Table 10
A and H Types
(With shutdown function, VDD / VOUT non-separate type)
Pin No. Symbol Description
1 OFF/ON Shutdown pin
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
2 VOUT Output voltage pin and IC power supply pin
3
NC*1 No connection
4 VSS GND pin
SOT-23-5
Top view
5 4
3 2 1
5 CONT External inductor connection pin
Figure 5 *1. The NC pin indicates electrically open.
Table 11
D and J Types
(Without shutdown function, VDD / VOUT separate type)
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VDD IC power supply pin
3
NC*1 No connection
4 VSS GND pin
5 CONT External inductor connection pin
*1. The NC pin indicates electrically open.
Table 12
A and H Types
(Without shutdown function, VDD / VOUT non-separate type)
Pin No. Symbol Description
1 VSS GND pin
2 VOUT Output voltage pin and IC power supply pin
3 CONT External inductor connection pin
SOT-89-3
Top view
3
2 1
Figure 6
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 9
Absolute Maximum Ratings
Table 13 (Ta = 25°C unless otherwise specified)
Item Symbol Absolute maximum rating Unit
VOUT pin voltage VOUT V
SS − 0.3 to VSS + 12 V
OFF/ON pin voltage*1 OFF/ON
V VSS − 0.3 to VSS + 12 V
VDD pin voltage*2 VDD V
SS − 0.3 to VSS + 12 V
CONT pin voltage VCONT V
SS − 0.3 to VSS + 12 V
CONT pin current ICONT 300 mA
150 (When not mounted on board) mW
SOT-23-3 430*3 mW
250 (When not mounted on board) mW
SOT-23-5 600*3 mW
500 (When not mounted on board) mW
Power dissipation
SOT-89-3
PD
1000*3 mW
Operating ambient temperature Topr −40 to + 85 °C
Storage temperature Tstg −40 to + 125 °C
*1. With shutdown function
*2. For VDD / VOUT separate type
*3. 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
0 50 100
150
800
400
0
Power dissipation (P
D
) [mW]
Ambient temperature (Ta) [°C]
1000
600
200
1200
SOT-23-3
SOT-23-5
SOT-89-3
0 50 100
150
400
200
0
Power dissipation (P
D
) [mW]
Ambient temperature (Ta) [°C]
500
300
100
600
SOT-23-3
SOT-23-5
SOT-89-3
Figure 7 Power Dissipation of Packages
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
10
Electrical Characteristics
(1) 50 kHz Product (A and D Types)
Table 14 (Ta = 25°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Measurement
circuit
Output voltage V
OUT
−
V
OUT(S)
×
0.976 V
OUT(S)
V
OUT(S)
×
1.024 V 2
Input voltage V
IN
−
−
−
10 V 2
Operation start voltage V
ST1
I
OUT
= 1 mA
−
−
0.9 V 2
Oscillation start voltage V
ST2
No external parts, Voltage applied to V
OUT
−
−
0.8 V 1
Operation holding voltage V
HLD
I
OUT
= 1 mA, Judged by decreasing V
IN
voltage gradually 0.7
−
−
V 2
S-835xx15 to 19
−
10.8 18.0
μ
A 1
S-835xx20 to 29
−
13.3 22.2
μ
A 1
S-835xx30 to 39
−
18.7 31.1
μ
A 1
S-835xx40 to 49
−
24.7 41.1
μ
A 1
S-835xx50 to 59
−
31.0 51.6
μ
A 1
Current consumption 1 I
SS1
V
OUT
= V
OUT(S)
×
0.95
S-835xx60 to 65
−
37.8 63.0
μ
A 1
S-835xx15 to 19
−
4.8 9.5
μ
A 1
S-835xx20 to 29
−
5.0 9.9
μ
A 1
S-835xx30 to 39
−
5.1 10.2
μ
A 1
S-835xx40 to 49
−
5.3 10.6
μ
A 1
S-835xx50 to 59
−
5.5 10.9
μ
A 1
Current consumption 2 I
SS2
V
OUT
= V
OUT(S)
+
0.5 V
S-835xx60 to 65
−
5.7 11.3
μ
A 1
Current consumption during
shutdown
(With shutdown function) I
SSS
OFF/ON
V
= 0 V
−
−
0.5
μ
A 1
S-835xx15 to 19 80 128
−
mA 1
S-835xx20 to 24 103 165
−
mA 1
S-835xx25 to 29 125 200
−
mA 1
S-835xx30 to 39 144 231
−
mA 1
S-835xx40 to 49 176 282
−
mA 1
S-835xx50 to 59 200 320
−
mA 1
Switching current I
SW
V
CONT
= 0.4 V
S-835xx60 to 65 215 344
−
mA 1
Switching transistor leakage
current I
SWQ
V
CONT
= V
OUT
= 10 V
−
−
0.5
μ
A 1
Line regulation
Δ
V
OUT1
V
IN
= V
OUT(S)
×
0.4 to
×
0.6
−
30 60 mV 2
Load regulation
Δ
V
OUT2
I
OUT
= 10
μ
A to V
OUT(S)
/ 250
×
1.25
−
30 60 mV 2
Output voltage temperature
coefficient
OUT
OUT
VTaΔ
VΔ
•
Ta =
−
40
°
C to
+
85
°
C
−
±
50
−
ppm /
°
C 2
Oscillation frequency f
OSC
V
OUT
= V
OUT(S)
×
0.95 42.5 50 57.5 kHz 1
Maximum duty ratio MaxDuty V
OUT
= V
OUT(S)
×
0.95 75 83 90 % 1
PWM / PFM switching duty
ratio (For S-8354 Series) PFMDuty V
IN
= V
OUT(S)
−
0.1 V, No-load 10 15 24 % 1
V
SH
Measured oscillation at CONT pin 0.75
−
−
V 1
V
SL1
At V
OUT
≥
1.5 V
−
−
0.3 V 1
OFF/ON
pin input voltage
(With shutdown function) V
SL2
Judged oscillation stop at
CONT pin At V
OUT
<
1.5 V
−
−
0.2 V 1
I
SH
OFF/ON
V
= V
OUT(S)
×
0.95
−
0.1
−
0.1
μ
A 1
OFF/ON
pin input current
(With shutdown function) I
SL
OFF/ON
V
= 0 V
−
0.1
−
0.1
μ
A 1
Soft start time t
SS
−
3.0 6.0 12.0 ms 2
Efficiency EFFI
−
−
85
−
% 2
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 11
External parts
Coil: CDRH6D28-101 of Sumida Corporation
Diode: MA2Z748 (Shottky type) of Matsushita Elect ric Industrial Co., Lt d.
Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation
VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω
With shutdown function : OFF/ON pin is connected to VOUT
For VDD / VOUT separate type : VDD pin is connected to VOUT pin
Remark 1. V
OUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output
voltage.
2. VDD / VOUT separate type
A step-up operation is performed from VDD = 0.8 V. However, 1.8 V≤VDD≤10 V is recommended stabilizing
the output voltage and oscillat ion frequency. (VDD≥1.8 V must be applied for products with a set value of less
than 1.9 V.)
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
12
(2) 30 kHz Product (C Type)
Table 15 (Ta = 25°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Measurement
circuit
Output voltage V
OUT
−
V
OUT(S)
×
0.976 V
OUT(S)
V
OUT(S)
×
1.024 V 2
Input voltage V
IN
−
−
−
10 V 2
Operation start voltage V
ST1
I
OUT
= 1 mA
−
−
0.9 V 2
Oscillation start voltage V
ST2
No external parts, Voltage applied to V
OUT
−
−
0.8 V 1
Operation holding voltage V
HLD
I
OUT
= 1 mA, Judged by decreasing V
IN
voltage gradually 0.7
−
−
V 2
S-835xx20 to 29
−
9.8 16.4
μ
A 1
S-835xx30 to 39
−
13.1 21.9
μ
A 1
S-835xx40 to 49
−
16.8 28.0
μ
A 1
S-835xx50 to 59
−
20.7 34.5
μ
A 1
Current consumption 1 I
SS1
V
OUT
= V
OUT(S)
×
0.95
S-835xx60 to 65
−
24.8 41.4
μ
A 1
S-835xx20 to 29
−
435 9.0
μ
A 1
S-835xx30 to 39
−
4.7 9.4
μ
A 1
S-835xx40 to 49
−
4.9 9.7
μ
A 1
S-835xx50 to 59
−
5.1 10.1
μ
A 1
Current consumption 2 I
SS2
V
OUT
= V
OUT(S)
+
0.5 V
S-835xx60 to 65
−
5.2 10.4
μ
A 1
S-835xx20 to 24 52 83
−
mA 1
S-835xx25 to 29 62 100
−
mA 1
S-835xx30 to 39 72 115
−
mA 1
S-835xx40 to 49 88 141
−
mA 1
S-835xx50 to 59 100 160
−
mA 1
Switching current I
SW
V
CONT
= 0.4 V
S-835xx60 to 65 108 172
−
mA 1
Switching transistor leakage
current I
SWQ
V
CONT
= V
OUT
= 10 V
−
−
0.5
μ
A 1
Line regulation
Δ
V
OUT1
V
IN
= V
OUT(S)
×
0.4 to
×
0.6
−
30 60 mV 2
Load regulation
Δ
V
OUT2
I
OUT
= 10
μ
A to V
OUT(S)
/ 250
×
1.25
−
30 60 mV 2
Output voltage temperature
coefficient
OUT
OUT
VTaΔ
VΔ
•
Ta =
−
40
°
C to
+
85
°
C
−
±
50
−
ppm /
°
C 2
Oscillation frequency f
OSC
V
OUT
= V
OUT(S)
×
0.95 25 30 35 kHz 1
Maximum duty ratio MaxDuty V
OUT
= V
OUT(S)
×
0.95 75 83 90 % 1
PWM / PFM switching duty
ratio (For S-8354 Series) PFMDuty V
IN
= V
OUT(S)
−
0.1 V, No-load 10 15 24 % 1
Soft start time t
SS
−
3.0 6.0 12.0 ms 2
Efficiency EFFI
−
−
84
−
% 2
External parts
Coil: CDRH6D28-101 of Sumida Corporation
Diode: MA2Z748 (Shottky type) of Matsushita Elect ric Industrial Co., Lt d.
Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation
VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω
Remark VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output volt age.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 13
(3) 250 kHz Product (H and J Types)
Table 16 (Ta = 25°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Measurement
circuit
Output voltage V
OUT
−
V
OUT(S)
×
0.976 V
OUT(S)
V
OUT(S)
×
1.024 V 2
Input voltage V
IN
−
−
−
10 V 2
Operation start voltage V
ST1
I
OUT
= 1 mA
−
−
0.9 V 2
Oscillation start voltage V
ST2
No external parts, Voltage applied to V
OUT
−
−
0.8 V 1
Operation holding voltage V
HLD
I
OUT
= 1 mA, Judged by decreasing V
IN
voltage gradually 0.7
−
−
V 2
S-835xx15 to 19
−
36.5 60.8
μ
A 1
S-835xx20 to 29
−
48.3 80.5
μ
A 1
S-835xx30 to 39
−
74.3 123.8
μ
A 1
S-835xx40 to 49
−
103.1 171.9
μ
A 1
S-835xx50 to 59
−
134.1 223.5
μ
A 1
Current consumption 1 I
SS1
V
OUT
= V
OUT(S)
×
0.95
S-835xx60 to 65
−
167.0 278.4
μ
A 1
S-835xx15 to 19
−
9.1 18.2
μ
A 1
S-835xx20 to 29
−
9.3 18.6
μ
A 1
S-835xx30 to 39
−
9.5 18.9
μ
A 1
S-835xx40 to 49
−
9.7 19.3
μ
A 1
S-835xx50 to 59
−
9.8 19.6
μ
A 1
Current consumption 2 I
SS2
V
OUT
= V
OUT(S)
+
0.5 V
S-835xx60 to 65
−
10.0 19.9
μ
A 1
Current consumption during
shutdown
(With shutdown function) I
SSS
OFF/ON
V
= 0 V
−
−
0.5
μ
A 1
S-835xx15 to 19 80 128
−
mA 1
S-835xx20 to 24 103 165
−
mA 1
S-835xx25 to 29 125 200
−
mA 1
S-835xx30 to 39 144 231
−
mA 1
S-835xx40 to 49 176 282
−
mA 1
S-835xx50 to 59 200 320
−
mA 1
Switching current I
SW
V
CONT
= 0.4 V
S-835xx60 to 65 215 344
−
mA 1
Switching transistor leakage
current I
SWQ
V
CONT
= V
OUT
= 10 V
−
−
0.5
μ
A 1
Line regulation
Δ
V
OUT1
V
IN
= V
OUT(S)
×
0.4 to
×
0.6
−
30 60 mV 2
Load regulation
Δ
V
OUT2
I
OUT
= 10
μ
A to V
OUT(S)
/ 250
×
1.25
−
30 60 mV 2
Output voltage temperature
coefficient
OUT
OUT
VTaV
•Δ
Δ
Ta =
−
40
°
C to
+
85
°
C
−
±
50
−
ppm /
°
C 2
Oscillation frequency f
OSC
V
OUT
= V
OUT(S)
×
0.95 212.5 250 287.5 kHz 1
Maximum duty ratio MaxDuty V
OUT
= V
OUT(S)
×
0.95 70 78 85 % 1
PWM / PFM switching duty
ratio (For S-8354 Series) PFMDuty V
IN
= V
OUT(S)
−
0.1 V, No-load 10 15 24 % 1
V
SH
Measured oscillation at CONT pin 0.75
−
−
V 1
V
SL1
At V
OUT
≥
1.5 V
−
−
0.3 V 1
OFF/ON
pin input voltage
(With shutdown function) V
SL2
Judged oscillation stop at
CONT pin At V
OUT
<
1.5 V
−
−
0.2 V 1
I
SH
OFF/ON
V
= V
OUT(S)
×
0.95
−
0.1
−
0.1
μ
A 1
OFF/ON
pin input current
(With shutdown function) I
SL
OFF/ON
V
= 0 V
−
0.1
−
0.1
μ
A 1
Soft start time t
SS
−
1.8 3.6 7.2 ms 2
Efficiency EFFI
−
−
85
−
% 2
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
14
External parts
Coil: CDRH6D28-220 of Sumida Corporation
Diode: MA2Z748 (Shottky type) of Matsushita Elect ric Industrial Co., Lt d.
Capacitor: F93 (16 V, 22 μF tantalum type) of Nichicon Corporation
VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω
With shutdown function : OFF/ON pin is connected to VOUT
For VDD / VOUT separate type : VDD pin is connected to VOUT pin
Remark 1. V
OUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output
voltage.
2. VDD / VOUT separate type
A step-up operation is performed from VDD = 0.8 V. However, 1.8 V≤VDD≤10 V is recommended stabilizing
the output voltage and oscillation frequency. (VDD≥1.8 V must be applied for products with a set value of less
than 1.9 V.)
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 15
Measurement Circuits
1.
300 Ω
A
VSS
VOUT
CONT
VDD
*2
0.1 μF
+
−
OFF/ON
*1
Oscilloscope
Figure 8
2.
V
VSS
CONT VOUT
VDD
*2
0.1 μF
+
−
+
−
OFF/ON
*1
Figure 9
*1. With shutdown function
*2. For VDD / VOUT separate type
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
16
Operation
1. Switching Control Types
1. 1 PWM Control (S-8353 Series)
The S-8353 Series is a DC-DC converter using a pulse width modulation method (PWM) and features low current
consumption. 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.
In the S-8353 Series, the switching frequency does not change, although the pulse width changes from 0% to
83% (78% for H and J type) corresponding to each load current. The ripple voltage generated f rom switching can
thus be removed easily using a filter because the switching frequency is constant.
1. 2 PWM / PFM Switching Control (S-8354 Series)
The S-8354 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, and features low current
consumption.
The S-8354 Series operates under PWM control with the pulse width duty changing from 15% to 83% (78% for H
and J type) in a high output load current area. On the other hand, the S-8354 Series operat es under PFM control
with the pulse width duty fixed at 15% in a low output 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 can prevent 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.), input voltage, and out put voltage. This
series are an especially efficient DC-DC converter at an output current around 100 μA.
2. Soft Start Function
For this IC, a built-in soft start circuit controls the ru sh current and overshoot of the out put volt age when the power
is turned on or the OFF/ON pin is set to “H” level.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 17
3. OFF/ON Pin (Shutdown Pin) (SOT-23-5 Package Products of A and H Types)
OFF/ON pin stops or starts st ep-up operation.
Setting the OFF/ON pin to the “L” level stops operation of all the internal circuits and reduces the current
consumption significantly.
DO NOT use the OFF/ON pin in a floating state because it has t he structure shown in Figure 10 and is not pulled
up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0.75 V to the OFF/ON pin because
applying such a voltage increases the current consumption. If the OFF/ON pin is not used, connect it to the VOUT
pin.
The OFF/ON pin does not have hysteresis.
Table 17
OFF/ON pin CR oscillation circuit Output voltage
“H” Operation Fixed
“L” Stop
≅VIN*1
*1. Voltage obtained by subtracting the voltage drop due to the DC resistance of the induct or and the diode forward
voltage from VIN.
VSS
VOUT
OFF/ON
Figure 10 OFFON/ Pin Structure
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
18
4. Operation
The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 11.)
C
L
M1
D
VOUT
CONT
VIN L
+
EXT
VSS −
Figure 11 Step-Up Switching Regulator Circuit for Basic Equation
Voltage at CONT pin at the moment M1 is turned ON (VA) *1 :
VA = VS *2 (1)
*1. Current flowing through L (IL) is zero.
*2. Non-saturated voltage of M1.
The change in IL over time :
LVV
L
V
dt
dI SINLL −
== (2)
Integration of equation (2) (IL) :
t
LVV
ISIN
L•
⎟
⎠
⎞
⎜
⎝
⎛−
= (3)
IL flows while M1 is ON (tON). The time of tON is determined by the oscillation frequency of OSC.
The peak current (IPK) after tON :
ON
SIN
PK t
LVV
I•
⎟
⎠
⎞
⎜
⎝
⎛−
= (4)
The energy stored in L is represented by 1/2 • L (IPK)2.
When M1 is turned OFF (tOFF), the energy stored in L is emitted through a diode to the output capacitor.
Then, the reverse voltage (V L) is generated :
VL = (VOUT + VD*1) − VIN (5)
*1. Diode forward voltage
The voltage at CONT pin rises only by VOUT+VD.
The change in the current (I L) flowing through the diode into VOUT during tOFF :
LVVV
L
V
dt
dI INDOUTLL −+
== (6)
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 19
Integration of the equat ion (6) is as follows :
t
LVVV
II INDOUT
PKL •
⎟
⎠
⎞
⎜
⎝
⎛−+
−= (7)
During tON, the energy is stored in L and is not transmitted to VOUT. When receiving the output current (IOUT) from
VOUT, the energy of the capacitor (CL) is consumed. As a result, the pin voltage of CL is reduced, and goes to the
lowest level after M1 is turned ON (tON). When M1 is turned OFF, the energy stored in L is transmitted through the
diode to CL, and the voltage of CL rises rapidly. VOUT is a time function, and theref ore indicates the maximum value
(ripple voltage (VP−P) ) when the current flowing through into VOUT and load current (IOUT) match.
Next, the ripple voltage is determined as follows.
IOUT vs. t1 (time) from when M1 is turned OFF (after tON) to when VOUT reaches the maximum level :
1
INDOUT
PKOUT t
LVVV
II •
⎟
⎠
⎞
⎜
⎝
⎛−+
−= (8)
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
−+
•−=∴ INDOUT
OUTPK1 VVV L
)II(t (9)
When M1 is turned OFF (tOFF), IL = 0 (when the energy of the inductor is completely transmitted). Based on equation (7) :
PK
OFF
INDOUT I
t
VVV L=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
−+ (10)
When substituting equation (10) for equation (9) :
OFF
PK
OUT
OFF1 t
I
I
tt •
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
−= (11)
Electric charge ΔQ1 which is charged in CL during t1 :
2
1
INDOUT
1PK
1t
0
INDOUT
1t
0
PKL
1t
0
1t
2
1
LVVV
tItdt
LVVV
dtIdtIQ •
−+
−•=•
−+
−•==Δ ∫∫∫ (12)
When substituting equation (12) for equation (9) :
()
1
OUTPK
1OUTPKPK t
2II
tII
2
1
I1Q •
+
=•−−=Δ (13)
A rise in voltage (VP−P) due to ΔQ 1 :
1
OUTPK
LL
1
PP t
2II
C
1
C
QΔ
V•
⎟
⎠
⎞
⎜
⎝
⎛+
•==
− (14)
When taking into consideration IOUT to be consumed during t1 and the Equivalent Series Resistance (RESR) of CL :
L
1OUT
ESR
OUTPKOUTPK
LL
1
PP CtI
R
2II
1t
2II
C
1
C
Q
V•
−•
⎟
⎠
⎞
⎜
⎝
⎛+
+•
⎟
⎠
⎞
⎜
⎝
⎛+
•=
Δ
=
− (15)
When substituting equation (11) for equation (15) :
ESR
OUTPK
L
OFF
PK
2
OUTPK
PP R
2II
C
t
I2 )II(
V•
⎟
⎠
⎞
⎜
⎝
⎛+
+•
−
=
− (16)
Therefore to reduce the ripple voltage, it is important that the capacitor connected to the output pin has a large
capacity and a small RESR.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
20
External Parts Selection
The relationship between the major characteristics of the st ep-up circuit and the characteristic paramet ers of the external
parts is shown in Figure 12.
For higher efficiency ?
For larger output current ? At PFM control At PWM control For smaller ripple voltage ?
Smaller inductance
Larger inductance
Smaller direct current resistance of inductor
Larger output capacitance
Larger output capacitance
Figure 12 Relationship betw een Major Characteristics of Step-up Circuit and External Parts
1. Inductor
The inductance value (L value) has a strong influence on the maximum output current (IOUT) and efficiency (η).
The peak current (IPK) increases by decreasing L value and the stability of the circuit improves and IOUT increases. If L
value is decreased, the efficiency falls causing a decline in the current drive capacity for the switching transistor, and
IOUT decreases.
The loss of IPK by the switching transistor decreases by increasing L and the efficiency becomes maximum at a
certain L value. Further increasing L value decreases the ef ficiency due to the loss of the direct current resistance of
the coil. IOUT also decreases.
A higher oscillation frequency allows selection of a lower L value, making the coil smaller.
The recommended inductances are a 47 μH to 220 μH for A, C, and D types, a 10 μH to 47 μH for H and J types.
Be careful of the allowable inductor current when choosing an inductor. Exceeding the allowable current of the
inductor causes magnetic saturation, much lower efficiency and destruction of the I C chip due to a large current.
Choose an inductor so that IPK does not exceed t he allowable current. IPK in discont inuous mode is calculated by the
following equation:
Lf )VVV(I 2
IOSC
INDOUT
OUT
PK •
−+
= (A) (17)
fosc = oscillation frequency, VD ≅ 0.4 V.
2. Diode
Use an external diode that meets the f ollowing requirements :
• Low forward voltage : VF < 0.3 V
• High switching speed : 50 ns max.
• Reverse voltage : VOUT + VF or more
• Current rate : IPK or more
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 21
3. Capacitor (CIN, CL)
A capacitor 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.
A capacitor on the output side (CL) is used for smoothing the output voltage. For step-up types, the output voltage
flows intermittently to the load current, so step-up types need a larger capacitance than step-down types. Therefore,
select an appropriate capacitor in accordance with the ripple voltage, which increases in case of a higher output
voltage or a higher load current. The capacitor value should be 10 μF or more.
Select an appropriate capacitor the equivalent series resist ance (RESR) for stable output voltage. The stable voltage
range in this IC depends on the RESR. Alt hough the inductance value (L value) is also a factor, an RESR of 30 t o 500
mΩ maximizes the characteristics. However, the best RESR value may depend on the L value, the capacitance, the
wiring, and the applications (output load). Therefore, fully evaluate the RESR under the actual operating condit ions to
determine the best value.
Refer to the “1. Example of Ceramic Capacitor Application” (Figure 16) in the “ Application Circuit” for the
circuit example using a ceramic capacitor and the external resistance of the capacitor (RESR).
4. VDD / VOUT Separate Type (D and J Types)
The D and J types provides separate internal circuit power supply (VDD pin) and output voltage setting pin (VOUT
pin) in the IC, making it ideal for the following applications.
(1) When changing the output voltage with external resistance.
(2) When outputting a high voltage within the operating voltage (10 V).
Choose the products in the Table 18 according to the applications (1) or (2) above.
Table 18
Output voltage (VCC) 1.8 V ≤ VCC < 5 V 5 V ≤ VCC ≤ 10 V
S-835xx18 Yes −
S-835xx50 − Yes
Connection to VDD pin VIN or VCC V
IN
Cautions 1. This IC starts a step-up operation at VDD = 0.8 V, but set 1.8 ≤ VDD ≤ 10 V to stabilize the output
voltage and frequency of the oscillator. (Input a voltage of 1.8 V or more at the VDD pin for all
products w ith a setting less than 1.9 V.) An input voltage of 1.8 V or more at the VDD pin allows
connection of the VDD pin to either the input voltage VIN pin or output VOUT pin.
2. Choose external resistors RA and RB so as to not affect the output voltage, considering that th ere
is impedance between the VOUT pin and VSS pin in the IC chip. The internal resistance
betw een the VOUT pin and VSS pin is as follows :
(1) S-835xx18 : 2.1 MΩ to 14.8 MΩ
(2) S-835xx20 : 1.4 MΩ to 14.8 MΩ
(3) S-835xx30 : 1.4 MΩ to 14.2 MΩ
(4) S-835xx50 : 1.4 MΩ to 12.1 MΩ
3. Attach a capacitor (CC) in parallel to the RA resistance when an unstable event such as
oscillation of the output voltage occurs. Calculate CC using the following equation :
[]
kHz 20R2 1
CA
C•••
=π
F
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
22
Standard Circuits
(1) S-8353AxxMA / UA, S-8353CxxMA, S-8353HxxMA/UA, S-8354AxxMA/UA, S-8354CxxMA, S-8354HxxMA / UA
C
L
SD
V
IN
L VOUT
VSS
PWM control circuit
or PWM / PFM
switching control
circuit
Phase
compensating
circuit
C
IN
CONT
Oscillation circuit
Soft start built-in
reference power
supply
+
− +
−
IC internal
power
supply
+
−
Remark The power supply for the IC chip is from the VOUT pin.
Figure 13
(2) S-8353AxxMC, S-8353HxxMC, S-8354AxxMC, S-8354HxxMC
PWM control circuit
or PWM / PFM
switching control
circuit
Phase
compensating
circuit
Oscillation circuit
SD
V
IN
L VOUT
VSS
C
IN
C
L
CONT
OFF/ON
Soft start built-in
reference power
supply
+
−
IC internal
power
supply
+
−
+
−
Remark The power supply for the IC chip is from the VOUT pin.
Figure 14
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 23
(3) S-8353DxxMC, S-8353JxxMC, S-8354DxxMC, S-8354JxxMC
L
SD
VIN CIN
VDD
Soft start built-in
reference power
supply
Phase
compensating
circuit
Oscillation
circuit
PWM control circu it
or PWM / PFM
switching control
circuit
CONT
VSS
RB
R
A
C
C
VOUT
CL
+
−
IC internal
power
supply
+
−
+
−
Remark The power supply for the IC chip is from the VOUT pin.
Figure 15
Caution The Above connection diagram will not guarantee successful operation. Perform through
evaluation using the actual application to set the constant.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
24
Precautions
• Mount external capacitors, diodes, and coils as close as possible to t he IC. Especially, mounting the output capacitor
(capacitor between VDD pin and VSS pin for VDD / VOUT separate type) in the power supply line of the IC close to t he IC
can enable stable output characteristics. I f it is impossible, it is recommended to mount and wire a ceramic capacitor
of around 0.1 μF close to the IC.
• Characteristics 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 the dissipation of the switching transistor (especially at a high temperature) does not exceed the
allowable power dissipation of the package.
• The performance of this IC varies depending on the design of the PCB patterns, peripheral circuits and external parts.
Thoroughly test all settings with your device. The recommended external part should be used wherever possible, but if
this is not possible for some reason, contact an SII sales person.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
• SII claims no responsibility for any and all disputes arising out of or in connection with any infringement of the products
including this IC upon patents owned a third party.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 25
Application Circuits
1. Using Ceramic Capacitor Example
When using small RESR parts such as ceramic capacitors for the output capacitance, mount a resistor (R1)
corresponding to the RESR in series with the ceramic capacitor (CL) as shown in Figure 16.
R1 differs depending on L value, the capacitance, the wiring, and the application (output load).
The following example shows a circuit using R1 = 100 mΩ, output voltage = 3.3 V, output load = 100 mA and its
characteristics.
CONT VOUT
VSS
VOUT
SD
CL
L
R1
VIN CIN
Figure 16 Using Ceramic Capacitor Circuit Example
Table 19
IC L Type Name SD Type Name CL
(Ceramic capacitor) R1
S-8353A33 CDRH5D28-101 MA2Z748 10 μF × 2 100 mΩ
Caution The Above connection diagram and constant will not guarantee successful operation. Perform
through evaluation using the actual application to set the constant.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
26
2. Output Characteristics of The Using Ceramic Capacitor Circuit Example
The data of the step-up characteristics (a) Output current (IOUT) vs. Efficiency (η) characteristics, (b) Output current
(IOUT) vs. Output voltage (VOUT) characteristics, (c) Output Current (IOUT) vs. Ripple voltage (Vr) under conditions in
Table 19 is shown below.
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
V
IN
=1.8 V
V
IN
=2.7 V
V
IN
=0.9 V
0
20
40
60
80
100
0.01 0.1 1 10 100 1000
I
OUT
[mA]
η [%]
3.20
3.25
3.30
3.35
3.40
0.01 0.1 1 10 100 1000
I
OUT
[mA]
V
OUT
[V]
V
IN
=1.8 V
V
IN
=2.7 V
V
IN
=0.9 V
(c) Output current (IOUT) vs. Ripple voltage (Vr)
0
20
40
60
80
100
120
0.01 0.1 1 10 100 1000
V
r
[mV]
I
OUT
[mA]
140
V
IN
= 1.8 V
V
IN
= 2.7 V
V
IN
= 0.9 V
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 27
Characteristics (Typical Data)
1. Example of Major Temperature characteristics (Ta = −40°C to +85°C, VOUT = 3.3 V)
(1) Current Consumption 1 (ISS1) vs. Temperature (T a)
fOSC = 50 kHz fOSC = 250 kHz
0
10
20
30
40
50
−40 −20 0 20 40 60 80 100
Ta [°C]
I
SS1
[μA]
0
10
20
30
40
50
I
SS1
[μA]
−40 −20 0 20 40 60 80 100
Ta [°C]
(2) Current Consumption 2 (ISS2) vs. Temperature (T a)
fOSC = 50 kHz fOSC = 250 kHz
0
2
4
6
8
10
−40 −20 0 20 40 60 80
100
Ta [°C]
I
SS2
[μA]
0
2
4
6
8
10
−40 −20 0 20 40 60 80 100
Ta [°C]
I
SS2
[μA]
(3) Current Consumption at Shutdown (ISSS) vs. Temperature (Ta)
fOSC = 250 kHz
0
0.2
0.4
0.6
0.8
1.0
−40 −20 0 20 40 60 80 100
Ta [°C]
I
SSS
[μA]
(4) Switching Current (I
SW
) vs. Temperature (Ta) (5) Switching Transistor Leakage Current (I
SWQ
) vs. Temperature (Ta)
fOSC = 250 kHz fOSC = 250 kHz
−40 −20 0 20 40 60 80 100
Ta [°C]
ISW [mA]
100
200
300
400
500
0
0
0.2
0.4
0.6
0.8
1.0
−40 −20 0 20 40 60 80 100
Ta [°C]
I
SWQ
[
μ
A]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
28
(6) Oscillation Frequency (fOSC) vs. Temperature (T a)
fOSC = 50 kHz fOSC = 250 kHz
30
40
50
60
70
−40 −20 0 20 40 60 80 100
Ta [°C]
f
OSC
[kHz]
150
200
250
300
350
−40 −20 0 20 40 60 80 100
f
OSC
[kHz ]
Ta [°C]
(7) Maximum Duty Ratio (MaxDuty) vs. Temperature (Ta)
fOSC = 50 kHz fOSC = 250 kHz
−40 −20 0 20 40 60 80 100
Ta [°C]
MaxDuty [%]
50
60
70
80
90
100
−40 −20 0 20 40 60 80 100
Ta [°C]
MaxDuty [%]
50
60
70
80
90
100
(8) PWM / PFM Sw itching Duty Ratio (PFMDuty) vs.
Temperature (Ta) (S-8354 Series) (9) OFF/ON Pin Input Voltage “H” (VSH) vs.
Temperature (Ta)
fOSC = 250 kHz fOSC = 250 kHz
5
10
15
20
25
−40 −20 0 20 40 60 80 100
Ta [°C]
PFMDuty [%]
0
0.2
0.4
0.6
0.8
1.0
−40 −20 0 20 40 60 80 100
Ta [°C]
V
SH
[V]
(10) OFF/ON Pin Input Voltage “L” 1 (VSL1) vs.
Temperature (Ta) (S-8354 Series) (11) OFF/ON Pin Input Voltage “L” 2 (VSL2) vs.
Temperatuer (Ta)
fOSC = 250 kHz fOSC = 250 kHz
0
0.2
0.4
0.6
0.8
1.0
−40 −20 0 20 40 60 80 100
V
SL1
[V]
Ta [°C]
0
0.2
0.4
0.6
0.8
1.0
−40 −20 0 20 40 60 80 100
Ta [°C]
V
SL2
[V]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 29
(12) Soft Start Time (tSS) vs. Temperature (Ta)
fOSC = 50 kHz fOSC = 250 kHz
0
2
4
6
8
−40 −20 0 20 40 60 80 100
Ta [°C]
t
SS
[ms]
0
2
4
6
8
−40 −20 0 20 40 60 80 100
t
SS
[ms]
Ta
[
°C
]
(13) Operation Start Voltage (V
ST1
) vs. Temperature (Ta) (14) Oscillation Start Voltage (V
ST2
) vs. Temperature (Ta)
fOSC = 250 kHz fOSC = 250 kHz
0
0.2
0.4
0.6
0.8
1.0
1.2
−40 −20 0 20 40 60 80 100
Ta [°C]
V
ST1
[V]
0
0.2
0.4
0.6
0.8
1.0
1.2
−40 −20 0 20 40 60 80 100
Ta [°C]
V
ST2
[V]
(15) Output Voltage (VOUT) vs. Temperature (Ta)
fOSC = 50 kHz fOSC = 250 kHz
3.20
3.25
3.30
3.35
3.40
−40 −20 0 20 40 60 80 100
Ta
[
°C
]
V
OUT
[V]
3.20
3.25
3.30
3.35
3.40
−40 −20 0 20 40 60 80 100
Ta [°C]
V
OUT
[V]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
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30
2. Examples of Major Power Supply Dependence Characteristics (Ta = 25°C)
(1) Current Consumption 1 (I
SS1
) vs. Power Supply
Voltage (V
DD
), Current Consumption 2 (I
SS2
) vs.
Power Supply Voltage (V
DD
)
VOUT = 3.3 V, fOSC = 50 kHz VOUT = 3.3 V, fOSC = 250 kHz
0
10
20
30
40
50
0 2 4 6 8 10
V
DD
[V]
I
SS1
, I
SS2
[
μ
A]
0
20
40
60
80
100
0 2 4 6 8 10
VDD [V]
ISS1, ISS2 [
μ
A]
(2) Oscillation Frequency (fOSC) vs. Power Supply Voltage (VDD)
fOSC = 50 kHz fOSC = 250 kHz
30
40
50
60
70
0 2 4 6 8 10
VDD [V]
fOSC [kHz]
100
150
200
250
300
0246 8 10
VDD [V]
fOSC [kHz]
(3) Sw itching Current (ISW) vs. Power Supply Voltage (VDD)
0 2 4 6 8 10
V
DD
[V]
I
SW
[mA]
100
200
300
400
500
0
(4) Output Voltage (V
OUT
) vs. Power Supply Voltage (V
DD
) (V
OUT
= 3.3 V, V
IN
= 1.98 V, I
OUT
= 13.2 mA, V
DD
Separate Type)
fOSC = 50 kHz fOSC = 250 kHz
VDD [V]
VOUT [V]
3.0
3.1
3.2
3.3
3.4
0 2 4 6 8 10
0246 8 10
V
DD
[V]
V
OUT
[V]
3.0
3.1
3.2
3.3
3.4
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 31
3. Output Waveforms (VIN = 1.98 V)
(1) S-8353A33
IOUT = 10 mA IOUT = 50 mA
t [10
μ
s / div]
Output voltage
[0.01 V / div]
CONT voltage
[1 V / div]
t [10
μ
s / div]
Output voltage
[0.01 V / div]
CONT voltage
[1 V / div]
IOUT = 100 mA
t [10
μ
s / div]
Output voltage
[
0.02 V / div
]
CONT voltage
[1 V / div]
(2) S-8354H33
IOUT = 100 μA IOUT = 10 mA
t [2
μ
s / div]
Output voltage
[0.01 V / div]
CONT voltage
[1 V / div]
t [2
μ
s / div]
Output voltage
[0.01 V
/
div]
CONT voltage
[1 V
/
div]
IOUT = 50 mA IOUT = 100 mA
t [2
μ
s / div]
Output voltage
[0.02 V / div]
CONT voltage
[1 V / div]
Output voltage
[0.02 V
/
div]
CONT voltage
[1 V
/
div]
t [2
μ
s / div]
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
32
4. Examples of Transient Response Characteristics (Ta = 25°C, 250 kHz, S-8354H33)
(1) Pow er-On (VIN : 0 V → 2.0 V)
IOUT = 1 mA IOUT = 50 mA
0
2
t [1 ms
/
div]
V
IN
[V]
0
2
4
V
OUT
[V]
0
2
V
IN
[V]
0
2
4
V
OUT
[
V
]
t [1 ms / div]
(2) OFFON/ Pin Response ( OFF/ON
V : 0 V → 2.0 V, VIN = 2 V)
IOUT = 1 mA IOUT = 50 mA
0
2
t [1 m s
/
div]
V
ON/OFF
[V]
0
2
4
V
OUT
[V]
0
2
0
2
4
V
OUT
[V]
V
ON/OFF
[V]
t [1 ms / div]
(3) Load Fluctuations (VIN = 1.98 V)
100 μA → 50 mA 50 mA → 100 μA
V
OUT
[0.05 V / div]
100
μ
A
I
OUT
t [200
μ
s / div]
50 mA
V
OUT
[0.05 V
/
div]
100
μ
A
I
OUT
50 mA
t [5 ms / div]
(4) Input Voltage Fluctuations (IOUT = 50 mA)
VIN = 1.98 V → 2.64 V VIN = 2.64 V → 1.98 V
1.98
2.64
V
IN
[V]
t [100
μ
s / div]
V
OUT
[0.02 V / div]
V
IN
[V]
t [100
μ
s / div]
V
OUT
[0.04 V / div]
1.98
2.64
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 33
Reference Data
Reference data is provided to determine specific external components. Therefore, the following data shows the
characteristics of the recommended external components selected for various applications.
1. External Parts for Reference Data
Table 20 Efficiency vs. Output Current Characteristics and Output Voltage vs. Output Current Characteristics for
External Parts
Condition Product Name Oscillation
frequency Output voltage Control system Inductor Diode Output capacitor
1 S-8353H50MC 250 kHz 5.0 V PWM CDRH8D28-220 F93 (16 V, 47 μF)
2 S-8353H50MC 250 kHz 5.0 V PWM CDRH5D28-220 F93 (6.3 V, 22 μF)
3 S-8353H50MC 250 kHz 5.0 V PWM CXLP120-220 F92 (6.3 V, 47 μF)
4 S-8354A50MC 50 kHz 5.0 V PWM / PFM CDRH8D28-101 F93 (6.3 V, 22 μF)
5 S-8354A50MC 50 kHz 5.0 V PWM / PFM CXLP120-470 F92 (6.3 V, 47 μF)
6 S-8353A50MC 50 kHz 5.0 V PWM CDRH8D28-101 F93 (6.3 V, 22 μF)
7 S-8353A50MC 50 kHz 5.0 V PWM CXLP120-470 F92 (6.3 V, 47 μF)
8 S-8353A33MC 50 kHz 3.3 V PWM CDRH8D28-101
MA2Z748
F93 (6.3 V, 22 μF)
The properties of the external parts are shown below.
Table 21 Properties of External Parts
Component Product name Manufacturer Characteristics
CDRH8D28-220 22 μH, DCR*1 = 95 mΩ, IMAX.*2 = 1.6 A,
Component height = 3.0 mm
CDRH8D28-101 100 μH, DCR*1 = 410 mΩ, IMAX.*2 = 0.75 A,
Component height = 3.0 mm
CDRH5D28-220
Sumida Corporation
22 μH, DCR*1 = 122 mΩ, IMAX.*2 = 0.9 A,
Component height = 3.0 mm
CXLP120-220 22 μH, DCR*1 = 590 mΩ, IMAX.*2 = 0.55 A,
Component height = 1.2 mm
Inductor
CXLP120-470
Sumitomo Special Metals Co.,
Ltd. 47 μH, DCR*1 = 950 mΩ, IMAX.*2 = 0.45 A,
Component height = 1.2 mm
Diode MA2Z748 Mat s ushita Electric Industrial
Co., Ltd. VF*3 = 0.4 V, IF*4 = 0.3 A
F93 (16 V, 47 μF)
F93 (6.3 V, 22 μF)
Capacitor F92 (6.3 V, 47 μF) Nichicon Corporation −
*1. Direct current resistance
*2. Maximum allowable current
*3. Forward voltage
*4. Forward current
Caution The values shown in the characteristics column of Tab le 21 above are based on the materials p rovided by
each manufacture. How ever, consider the characteristics of the origin al materials w hen u sing the abo ve
products.
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
34
2. Output Current (IOUT) vs. Efficiency (η) Characteristics, Output Current (IOUT) vs. Output Voltage
(VOUT) Characteristics
The following shows the actual (a) Output current (I OUT) vs. Efficiency (η) characteristics and (b) Output current (IOUT)
vs. Output voltage (VOUT) characterist ics under the conditions of No. 1 to 8 in Table 20.
Condition 1 S-8353H50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η [%]
I
OUT
[
mA
]
1 10 100 10000.1 0.01
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
4.7
4.8
4.9
5.0
5.1
5.2
I
OUT
[mA]
V
OUT
[V]
1 10 100 10000.10.01
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
Condition 2 S-8353H50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η [%]
I
OUT
[mA]
1 10 100 10000.1 0.01
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
4.7
4.8
4.9
5.0
5.1
5.2
IOUT
[
mA
]
V
OUT
[V]
1 10 100 10000.10.01
VIN =3 V
VIN =4 V
VIN =2 V
Condition 3 S-8353H50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η [%]
I
OUT
[
mA
]
1 10 100 10000.1 0.01
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
4.7
4.8
4.9
5.0
5.1
5.2
IOUT
[
mA
]
VOUT [V]
1 10 100 10000.10.01
VIN =3 V
VIN =4 V
VIN =2 V
Condition 4 S-8354A50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η
[%]
IOUT [mA]
1 10 100 10000.1 0.01
VIN = 3 V
VIN = 4 V
VIN = 2 V
4.7
4.8
4.9
5.0
5.1
5.2
I
OUT
[
mA
]
V
OUT
[V]
1 10 100 10000.10.01
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
Rev.3.0_00 S-8353/8354 Series
Seiko Instruments Inc. 35
Condition 5 S-8354A50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η
[%]
I
OUT
[
mA
]
1 10 100 10000.1 0.01
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
4.7
4.8
4.9
5.0
5.1
5.2
IOUT
[
mA
]
VOUT [V]
1 10 100 10000.10.01
VIN =3 V
VIN =4 V
VIN =2 V
Condition 6 S-8353A50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η [%]
I
OUT
[mA]
1 10 100 10000.1 0.01
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
4.7
4.8
4.9
5.0
5.1
5.2
I
OUT
[
mA
]
V
OUT
[V]
1 10 100 10000.10.01
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
Condition 7 S-8353A50MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η [%]
I
OUT
[mA]
1 10 100 10000.1 0.01
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
4.7
4.8
4.9
5.0
5.1
5.2
I
OUT
[
mA
]
V
OUT
[V]
1 10 100 10000.10.01
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
Condition 8 S-8353A33MC
(a) Output current (IOUT) vs. Efficiency (η) (b) Output current (IOUT) vs. Output voltage (VOUT)
20
40
60
80
100
η
[%]
I
OUT
[
mA
]
1 10 100 10000.1 0.01
V
IN
= 1.8 V
V
IN
= 2.7 V
V
IN
= 0.9 V
3.0
3.1
3.2
3.3
3.4
3.5
I
OUT
[mA]
V
OUT
[V]
1 10 100 10000.10.01
V
IN
=1.8 V
V
IN
=2.7 V
V
IN
=0.9 V
STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series Rev.3.0_00
Seiko Instruments Inc.
36
3. Output Current (IOUT) vs. Ripple Voltage (Vr) Characteristics
The following shows the actual Output current (IOUT) vs. Ripple voltage (Vr) characteristics and (b) Output current
(IOUT) vs. Output voltage (VOUT) characteristics under the conditions of No. 1 to 8 in Table 20.
Condition 1 S-8353H50MC Condition 2 S-8353H50MC
V
r
[mV]
I
OUT
[mA]
1 10 100 10000.1 0.01
20
40
60
80
100
0
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
I
OUT
[mA]
Vr [mV]
1 10 100 10000.10.01
20
40
60
80
100
0
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
Condition 3 S-8353H50MC Condition 4 S-8354A50MC
V
r
[mV]
I
OUT
[mA]
1 10 100 10000.1 0.01
40
80
120
160
200
0
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
I
OUT
[
mA
]
V
r
[mV]
1 10 100 10000.10.01
40
80
120
160
200
0
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
Condition 5 S-8354A50MC Condition 6 S-8353A50MC
40
80
120
160
200
0
240
280
I
OUT
[
mA
]
1 10 100 10000.1 0.01
V
r
[mV]
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
I
OUT
[mA]
V
r
[mV]
1 10 100 10000.10.01
40
80
120
160
200
0
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
Condition 7 S-8353A50MC Condition 8 S-8353A33MC
40
80
120
160
200
0
240
280
I
OUT
[
mA
]
1 10 100 10000.1 0.01
V
r
[mV]
V
IN
= 3 V
V
IN
= 4 V
V
IN
= 2 V
I
OUT
[mA]
V
r
[mV]
1 10 100 10000.10.01
40
80
120
160
200
0
V
IN
=3 V
V
IN
=4 V
V
IN
=2 V
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
2.9±0.2
0.95±0.1
1.9±0.2
+0.1
-0.05
0.16
0.4±0.1
1
23
No. MP003-A-P-SD-1.1
MP003-A-P-SD-1.1
SOT233-A-PKG Dimensions
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
1.6±0.1
0.25±0.05
4.0±0.1
2.0±0.1
4.0±0.1
1.5 +0.1
-0.05
1.1±0.1
2.85±0.2
No. MP003-A-C-SD-1.1
MP003-A-C-SD-1.1
SOT233-A-Carrier Tape
Feed direction
1
23
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
(60°)
(60°)
ø13±0.2
12.5max.
9.0±0.3
QTY. 3,000
No. MP003-A-R-SD-1.1
MP003-A-R-SD-1.1
SOT233-A-Reel
Enlarged drawing in the central part
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
No. MP003-C-P-SD-1.0
MP003-C-P-SD-1.0
SOT233-C-PKG Dimensions
2.9±0.2
0.95±0.1
1.9±0.2
+0.1
-0.06
0.16
0.4±0.1
1
23
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
No. MP003-C-C-SD-2.0
MP003-C-C-SD-2.0
SOT233-C-Carrier Tape
1.4±0.2
0.23±0.1
4.0±0.1
2.0±0.1
4.0±0.1
ø1.5 +0.1
-0
ø1.0
3.2±0.2
Feed direction
1
23
+0.25
-0
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
QTY. 3,000
No. MP003-Z-R-SD-1.0
MP003-Z-R-SD-1.0
SOT233-C-Reel
ø13±0.2
12.5max.
9.2±0.5
Enlarged drawing in the central part
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
2.9±0.2
1.9±0.2
0.95±0.1
0.4±0.1
0.16 +0.1
-0.06
123
4
5
No. MP005-A-P-SD-1.2
MP005-A-P-SD-1.2
SOT235-A-PKG Dimensions
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
ø1.5 +0.1
-0 2.0±0.05
ø1.0 +0.2
-0 4.0±0.1
1.4±0.2
0.25±0.1
3.2±0.2
123
45
No. MP005-A-C-SD-2.1
MP005-A-C-SD-2.1
SOT235-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches:40.0±0.2)
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
QTY. 3,000
No. MP005-A-R-SD-1.1
MP005-A-R-SD-1.1
SOT235-A-Reel
Enlarged drawing in the central part
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
0.4±0.05
1.5±0.1
4.5±0.1
1.6±0.2
1.5±0.1 1.5±0.1
0.45±0.1
0.4±0.1
0.4±0.1
45°
312
No. UP003-A-P-SD-1.1
UP003-A-P-SD-1.1
SOT893-A-PKG Dimensions
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
2.0±0.1
0.3±0.05
8.0±0.1
ø1.5+0.1
-0
2.0±0.05
ø1.5+0.1
-0
4.75±0.1
5° max.
No. UP003-A-C-SD-1.1
UP003-A-C-SD-1.1
SOT893-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches : 40.0±0.2)
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
13.0±0.3
16.5max.
(60°)
(60°)
QTY. 1,000
No. UP003-A-R-SD-1.1
UP003-A-R-SD-1.1
SOT893-A-Reel
Enlarged drawing in the central part
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• The information described herein is subject to change without notice.
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