S-1131 Series
www.ablicinc.com
HIGH RIPPLE-REJECTION AND LOW DROPOUT
MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
© ABLIC Inc., 2002-2014 Rev.4.1_02
1
The S-1131 Series is a positive voltage regulator with a low dropout voltage, high-accuracy output voltage, and
low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a built-in
overcurrent protection circuit prevents the load current from exceeding the current capacitance of the output
transistor. An ON/OFF circuit ensures a long battery life, and small SOT-89-3, SOT-89-5 and 6-Pin HSON(A)
packages realize high-density mounting.
Features
Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V step
Output voltage accuracy: 1.0%
Dropout voltage: 250 mV typ. (3.0 V output product, IOUT = 100 mA)
Current consumption: During operation: 35 A typ., 65 A max.
During power-off: 0.1 A typ., 1.0 A max.
Output current: Possible to output 300 mA (VIN VOUT
(
S
)
1.0 V)*1
Ripple rejection: 70 dB typ. (f = 1.0 kHz)
Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
Built-in ON/OFF circuit: Ensures long battery life.
Operation temperature range: Ta = 40°C to 85°C
Lead-free, Sn 100%, halogen-free*2
*1. Attention should be paid to the power dissipation of the package when the output current is large.
*2. Refer to “ Product Name Structure” for details.
Applications
Constant-voltage power supply for DVD and CD-ROM drive
Constant-voltage power supply for battery-powered device
Constant-voltage power supply for personal communication device
Constant-voltage power supply for note book PC
Packages
SOT-89-3
SOT-89-5
6-Pin HSON(A)
www.ablic.com
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
2
Block Diagrams
(1) Without ON/OFF circuit (Package: SOT-89-3)
Reference
voltage circuit
*1. Parasitic diode
*1
VIN
VSS
Overcurrent
protection circuit
VOUT
Figure 1
(2) With ON/OFF circuit (Package: SOT-89-5, 6-Pin HSON(A))
Reference
volta
g
e circuit
ON/OFF
*1. Parasitic diode
*1
ON/OFF
circuit
VIN
VSS
Overcurrent
p
rotection circuit
VOUT
Figure 2
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
3
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1131 Series. Refer to “1.
Product name” regarding the contents of product name, “2. Packages” regarding the package
drawings, “3. Product name list” regarding details of the product name.
1. Product name
(1) SOT-89-3, SOT-89-5
S-1131 x xx xx - xxx TF x
Output voltage
15 to 55
(e.g., when the output voltage is 1.5 V, it is expressed
as 15.
)
Package name (abbreviation)
UA: SOT-89-3
UC: SOT-89-5
Environmental code
U: Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
Product type*3
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
IC direction in tape specifications*1
Product name (abbreviation)*2
*1. Refer to the tape drawing.
*2. Refer to the product name list.
*3. Refer to “3. ON/OFF pin” in “ Operation” (Expect SOT-89-3).
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
4
(2) 6-Pin HSON(A)
S-1131 x xx PD - xxx TF x
Output voltage
15 to 55
(e.g., when the output voltage is 1.5 V, it is expressed
as 15.
)
Package name (abbreviation)
PD: 6-Pin HSON
(
A
)
Environmental code
S: Lead-free, halogen-free
G: Lead-free (for details, please contact our sales office)
Product type*3
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
IC direction in tape specifications*1
Product name (abbreviation)*2
*1. Refer to the tape drawing.
*2. Refer to the product name list.
*3. Refer to “3. ON/OFF pin” in “ Operation”
2. Packages
Package Name Drawing Code
Package Tape Reel
SOT-89-3 UP003-A-P-SD UP003-A-C-SD UP003-A-R-SD
SOT-89-5 UP005-A-P-SD UP005-A-C-SD UP005-A-R-SD
6-Pin HSON(A) PD006-A-P-SD PD006-A-C-SD PD006-A-R-SD
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
5
3. Product name list
Table 1
Output voltage SOT-89-3 SOT-89-5 6-Pin HSON(A)
1.5V±1.0% S-1131B15UA-N4ATFx S-1131B15UC-N4ATFx S-1131B15PD-N4ATFz
1.6V±1.0% S-1131B16UA-N4BTFx S-1131B16UC-N4BTFx S-1131B16PD-N4BTFz
1.7V±1.0% S-1131B17UA-N4CTFx S-1131B17UC-N4CTFx S-1131B17PD-N4CTFz
1.8V±1.0% S-1131B18UA-N4DTFx S-1131B18UC-N4DTFx S-1131B18PD-N4DTFz
1.9V±1.0% S-1131B19UA-N4ETFx S-1131B19UC-N4ETFx S-1131B19PD-N4ETFz
2.0V±1.0% S-1131B20UA-N4FTFx S-1131B20UC-N4FTFx S-1131B20PD-N4FTFz
2.1V±1.0% S-1131B21UA-N4GTFx S-1131B21UC-N4GTFx S-1131B21PD-N4GTFz
2.2V±1.0% S-1131B22UA-N4HTFx S-1131B22UC-N4HTFx S-1131B22PD-N4HTFz
2.3V±1.0% S-1131B23UA-N4ITFx S-1131B23UC-N4ITFx S-1131B23PD-N4ITFz
2.4V±1.0% S-1131B24UA-N4JTFx S-1131B24UC-N4JTFx S-1131B24PD-N4JTFz
2.5V±1.0% S-1131B25UA-N4KTFx S-1131B25UC-N4KTFx S-1131B25PD-N4KTFz
2.6V±1.0% S-1131B26UA-N4LTFx S-1131B26UC-N4LTFx S-1131B26PD-N4LTFz
2.7V±1.0% S-1131B27UA-N4MTFx S-1131B27UC-N4MTFx S-1131B27PD-N4MTFz
2.8V±1.0% S-1131B28UA-N4NTFx S-1131B28UC-N4NTFx S-1131B28PD-N4NTFz
2.9V±1.0% S-1131B29UA-N4OTFx S-1131B29UC-N4OTFx S-1131B29PD-N4OTFz
3.0V±1.0% S-1131B30UA-N4PTFx S-1131B30UC-N4PTFx S-1131B30PD-N4PTFz
3.1V±1.0% S-1131B31UA-N4QTFx S-1131B31UC-N4QTFx S-1131B31PD-N4QTFz
3.2V±1.0% S-1131B32UA-N4RTFx S-1131B32UC-N4RTFx S-1131B32PD-N4RTFz
3.3V±1.0% S-1131B33UA-N4STFx S-1131B33UC-N4STFx S-1131B33PD-N4STFz
3.4V±1.0% S-1131B34UA-N4TTFx S-1131B34UC-N4TTFx S-1131B34PD-N4TTFz
3.5V±1.0% S-1131B35UA-N4UTFx S-1131B35UC-N4UTFx S-1131B35PD-N4UTFz
3.6V±1.0% S-1131B36UA-N4VTFx S-1131B36UC-N4VTFx S-1131B36PD-N4VTFz
3.7V±1.0% S-1131B37UA-N4WTFx S-1131B37UC-N4WTFx S-1131B37PD-N4WTFz
3.8V±1.0% S-1131B38UA-N4XTFx S-1131B38UC-N4XTFx S-1131B38PD-N4XTFz
3.9V±1.0% S-1131B39UA-N4YTFx S-1131B39UC-N4YTFx S-1131B39PD-N4YTFz
4.0V±1.0% S-1131B40UA-N4ZTFx S-1131B40UC-N4ZTFx S-1131B40PD-N4ZTFz
4.1V±1.0% S-1131B41UA-N5ATFx S-1131B41UC-N5ATFx S-1131B41PD-N5ATFz
4.2V±1.0% S-1131B42UA-N5BTFx S-1131B42UC-N5BTFx S-1131B42PD-N5BTFz
4.3V±1.0% S-1131B43UA-N5CTFx S-1131B43UC-N5CTFx S-1131B43PD-N5CTFz
4.4V±1.0% S-1131B44UA-N5DTFx S-1131B44UC-N5DTFx S-1131B44PD-N5DTFz
4.5V±1.0% S-1131B45UA-N5ETFx S-1131B45UC-N5ETFx S-1131B45PD-N5ETFz
4.6V±1.0% S-1131B46UA-N5FTFx S-1131B46UC-N5FTFx S-1131B46PD-N5FTFz
4.7V±1.0% S-1131B47UA-N5GTFx S-1131B47UC-N5GTFx S-1131B47PD-N5GTFz
4.8V±1.0% S-1131B48UA-N5HTFx S-1131B48UC-N5HTFx S-1131B48PD-N5HTFz
4.9V±1.0% S-1131B49UA-N5ITFx S-1131B49UC-N5ITFx S-1131B49PD-N5ITFz
5.0V±1.0% S-1131B50UA-N5JTFx S-1131B50UC-N5JTFx S-1131B50PD-N5JTFz
5.1V±1.0% S-1131B51UA-N5KTFx S-1131B51UC-N5KTFx S-1131B51PD-N5KTFz
5.2V±1.0% S-1131B52UA-N5LTFx S-1131B52UC-N5LTFx S-1131B52PD-N5LTFz
5.3V±1.0% S-1131B53UA-N5MTFx S-1131B53UC-N5MTFx S-1131B53PD-N5MTFz
5.4V±1.0% S-1131B54UA-N5NTFx S-1131B54UC-N5NTFx S-1131B54PD-N5NTFz
5.5V±1.0% S-1131B55UA-N5OTFx S-1131B55UC-N5OTFx S-1131B55PD-N5OTFz
Remark 1. Please contact our sales office for type A products.
2. x: G or U
z: G or S
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
6
Pin Configurations
1 3 2
SOT-89-3
Top view
Table 2
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 VIN Input voltage pin
Figure 3
5 4
1 3 2
SOT-89-5
Top view
Table 3
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 NC*1 No connection
4 ON/OFF ON/OFF pin
5 VIN Input voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
Figure 4
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
7
*1. Connect the exposed thermal
die pad at shadowed area to
the board, and set electric
potential open or VSS.
However, do not use it as the
function of electrode.
*
2. Be careful of the contact with
other wires because the pinch
lead has the same electric
potential as VSS.
6-Pin HSON(A)
Top view
6
5
4
1
2
3
Bottom view
*1
1
2
3
6
5
4
*2
Table 4
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 NC*1 No connection
4 NC*1 No connection
5 ON/OFF ON/OFF pin
6 VIN Input voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
Figure 5
Absolute Maximum Ratings
Table 5
(Ta
=
25C unless otherwise specified)
Item Symbol Absolute Maximum Rating Unit
Input voltage VIN VSS 0.3 to VSS 7 V
VON/OFF VSS 0.3 to VIN 0.3 V
Output voltage VOUT VSS 0.3 to VIN 0.3 V
Power
dissipation
SOT-89-3
PD
500 mW
SOT-89-5 500 mW
6-Pin HSON(A) 500 mW
Operation ambient temperature To
pr
40 to 85 C
Storage temperature Tst
g
40 to 125 C
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.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
8
Electrical Characteristics
Table 6
(Ta
=
25C unless otherwise specified)
Item Symbol Conditions Min. Typ. Max. Unit Test
Circuit
Output voltage
*1
V
OUT(E)1
V
IN
= V
OUT(S)
1.0 V, I
OUT
= 30 mA V
OUT(S)
0.99 V
OUT(S)
V
OUT(S)
1.01 V 1
V
OUT(E)2
V
IN
= V
OUT(S)
1.0 V, I
OUT
= 80 mA V
OUT(S)
0.98 V
OUT(S)
V
OUT(S)
1.02 V 1
Output current
*
2
I
OUT
V
IN
V
OUT
(
S
)
1.0 V 300
*
5
mA 3
Dropout voltage
*3
V
drop
I
OUT
= 100 mA
V
OUT
(
S
)
= 1.5 V
1.00 1.05 V
1
V
OUT
(
S
)
= 1.6 V
0.90 0.95 V 1
V
OUT
(
S
)
= 1.7 V
0.80 0.85 V 1
V
OUT
(
S
)
= 1.8 V
0.70 0.75 V 1
V
OUT
(
S
)
= 1.9 V
0.60 0.65 V 1
V
OUT
(
S
)
= 2.0 V
0.50 0.60 V 1
V
OUT
(
S
)
= 2.1 V
0.40 0.55 V 1
2.2 V
V
OUT
(
S
)
2.5 V
0.30 0.49 V 1
2.6 V
V
OUT
(
S
)
3.3 V
0.25 0.34 V 1
3.4 V
V
OUT
(
S
)
5.5 V
0.20 0.28 V 1
Line regulation
OUTIN
OUT1
VV
V
V
OUT(S)
0.5 V
V
IN
6.5 V,
I
OUT
= 80 mA
0.05 0.2 %/V 1
Load regulation
V
OUT2
V
IN
= V
OUT(S)
1.0 V,
1.0 mA
I
OUT
80 mA
20 40 mV 1
Output voltage
temperature coefficient
*4
OUT
OUT
VTa
V
V
IN
= V
OUT(S)
1.0 V, I
OUT
= 10 mA,
40
C
Ta
85
C
100
ppm
/
C1
Current consumption
during operation I
SS1
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = ON,
no load
35 65
A2
Input voltage V
IN
2.0
6.5 V
Ripple rejection
RR
V
IN
= V
OUT(S)
1.0 V, f = 1.0 kHz,
V
ri
p
= 0.5 Vrms, I
OUT
= 80 mA
70
dB 5
Short-circuit current I
short
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = ON,
V
OUT
= 0 V
450
mA 3
Current consumption
during power-off I
SS2
V
IN
= V
OUT(S)
1.0 V, ON/OFF pin = OFF,
no load
0.1 1.0
A2
ON/OFF pin
input voltage “H” V
SH
V
IN
= V
OUT(S)
1.0 V, R
L
= 1.0 k
1.5
V 4
ON/OFF pin
input voltage “L” V
SL
V
IN
= V
OUT(S)
1.0 V, R
L
= 1.0 k
0.3 V 4
ON/OFF pin
input current “H” I
SH
V
IN
= 6.5 V, V
ON/OFF
= 6.5 V
0.1
0.1
A4
ON/OFF pin
input current “L” I
SL
V
IN
= 6.5 V, V
ON/OFF
= 0 V
0.1
0.1
A4
*1. VOUT(S): Set output voltage
VOUT(E)1: Actual output voltage
Output voltage when fixing IOUT(= 30 mA) and inputting VOUT(S) 1.0 V
V
OUT(E)2: Actual output voltage
Output voltage when fixing IOUT(= 80 mA) and inputting VOUT
(
S
)
1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT
(
E
)
1 after gradually increasing the output current.
*3. Vdrop = VIN1 (VOUT3 0.98)
V
OUT3 is the output voltage when VIN = VOUT(S) 1.0 V and IOUT = 100 mA.
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage.
*4. A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
VOUT
Ta []
mV/°C *1 = VOUT(S) []
V*2 VOUT
Ta VOUT
[]
ppm/°C *3 1000
*1. Change in temperature of the output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the power
dissipation of the package when the output current is large.
This specification is guaranteed by design.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
9
Test Circuits
1.
VSS
VOUT
ON/OFF
*1
VIN
V
A
Set to ON
Figure 6
2.
VSS
VOUT VIN
Set to
VIN or GND
A
ON/OFF
*1
Figure 7
3.
VSS
VOUT VIN
V
A
Set to ON
ON/OFF
*1
Figure 8
4.
VSS
VOUT VIN
V
A RL
ON/OFF
*1
Figure 9
5.
VSS
VOUT VIN
V
Set to ON
RL
ON/OFF
*1
Figure 10
*1. In case of product with ON/OFF circuit.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
10
Standard Circuit
ON/OFF
*2
VSS
VOUTVIN
CIN
*1
CL
*3
Input Output
GND
Single GND
*1. CIN is a capacitor for stabilizing the input.
*2. In case of product with ON/OFF circuit.
*3. A tantalum capacitor (2.2 F or more) can be used.
Figure 11
Caution The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
Condition of Application
Input capacitor (CIN): 1.0 F or more
Output capacitor (CL): 2.2 F or more (tantalum capacitor)
Caution Generally a series regulator may cause oscillation, depending on the selection of external
parts. Check that no oscillation occurs with the application using the above capacitor.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
11
Explanation of Terms
1. Low dropout voltage regulator
This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.
2. Output voltage (VOUT)
The accuracy of the output voltage is ensured at 1.0% under the specified conditions of fixed input
voltage*1, fixed output current, and fixed temperature.
*1. Differs depending the product.
Caution If the above conditions change, the output voltage value may vary and exceed the
accuracy range of the output voltage. Refer to " Electrical Characteristics" and "
Characteristics (Typical Data)" for details.
3. Line regulation
VOUT1
VINVOUT
Indicates the dependency of the output voltage on the input voltage. That is, the value shows how much
the output voltage changes due to a change in the input voltage with the output current remaining
unchanged.
4. Load regulation (VOUT2)
Indicates the dependency of the output voltage on the output current. That is, the value shows how
much the output voltage changes due to a change in the output current with the input voltage remaining
unchanged.
5. Dropout voltage (Vdrop)
Indicates the difference between input voltage (VIN1) and the output voltage when; decreasing input
voltage (VIN) gradually until the output voltage has dropped out to the value of 98% of output voltage
(VOUT3), which is at VIN = VOUT(S) 1.0 V.
Vdrop = VIN1 (VOUT3 0.98)
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
12
6. Output voltage temperature coefficient
VOUT
Ta VOUT
The shaded area in Figure 12 is the range where VOUT varies in the operation temperature range when
the output voltage temperature coefficient is 100 ppm/C.
V
OUT
(
E
)
1
*1
Example of S-1131B28 typ. product
40
25
0.28 mV/C
V
OUT
[V]
*1. V
OUT(E)1
is the value of the output voltage measured at Ta = 25C.
85 Ta [C]
0.28 mV/C
Figure 12
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
VOUT
Ta []
mV/°C *1 = VOUT(S) []
V*2 VOUT
Ta VOUT
[]
ppm/°C *3 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
13
Operation
1. Basic operation
Figure 13 shows the block diagram of the S-1131 Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output
voltage resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to
maintain the constant output voltage which is not influenced by the input voltage and temperature
change, to the output transistor.
*1
*1. Parasitic diode
VSS
Current
supply
Vfb
Vref
VIN
VOUT
Rf
Rs
Error
amplifier
Reference voltage
circuit
Figure 13
2. Output transistor
In the S-1131 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN 0.3 V to prevent the voltage regulator from being damaged due
to reverse current flowing from the VOUT pin through a parasitic diode to the VIN pin, when the potential
of VOUT became higher than VIN.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
14
3. ON/OFF pin
In case of product with ON/OFF circuit, this pin starts and stops the regulator.
When the ON/OFF pin is set to OFF level, the entire internal circuit stops operating, and the built-in
P-channel MOS FET output transistor between the VIN pin and the VOUT pin is turned off, reducing
current consumption significantly. The VOUT pin becomes the Vss level due to the internally divided
resistance of several hundreds k between the VOUT pin and the VSS pin.
The structure of the ON/OFF pin is as shown in Figure 14. Since the ON/OFF pin is neither pulled down
nor pulled up internally, do not use it in the floating states. In addition, note that the current consumption
increases if a voltage of 0.3 V to VIN – 0.3 V is applied to the ON/OFF pin. When not using the ON/OFF
pin, connect it to the VSS pin in the product A type, and connect it to the VIN pin in B type.
Table 7
Product Type ON/OFF Pin Internal Circuit VOUT Pin Voltage Current Consumption
A “L”: ON Operate Set value ISS1
A “H”: OFF Stop VSS level ISS2
B “L”: OFF Stop VSS level ISS2
B “H”: ON Operate Set value ISS1
VSS
ON/OFF
VIN
Figure 14
Selection of Output Capacitor (CL)
The S-1131 Series performs phase compensation using the internal phase compensator in the IC and the
ESR (Equivalent Series Resistance) of the output capacitor to enable stable operation independent of
changes in the output load. Therefore, always place a capacitor (CL) of 2.2 F or more between the VOUT
pin and the VSS pin.
For stable operation of the S-1131 Series, it is essential to employ a capacitor whose ESR is within an
optimum range. Using a capacitor whose ESR is outside the optimum range (approximately 0.5 to 5 ),
whether larger or smaller, may cause an unstable output, resulting in oscillation. For this reason, a tantalum
electrolytic capacitor is recommended.
When a ceramic capacitor or an OS capacitor with a low ESR is used, it is necessary to connect an
additional resistor that serves as the ESR in series with the output capacitor. The required resistance value
is approximately 0.5 to 5 , which varies depending on the usage conditions, so perform sufficient
evaluation for selection. Ordinarily, around 1.0 is recommended.
Note that an aluminum electrolytic capacitor may increase the ESR at a low temperature, causing
oscillation. When using this kind of capacitor, perform thorough evaluation, including evaluation of
temperature characteristics.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
15
Precautions
Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is
low. When mounting an output capacitor between the VOUT pin and the VSS pin (CL) and a capacitor
for stabilizing the input between the VIN pin and the VSS pin (CIN), the distance from the capacitors to
these pins should be as short as possible.
Note that generally the output voltage may increase when a series regulator is used at low load current
(1.0 mA or less).
The S-1131 Series performs phase compensation by using an internal phase compensator and the ESR
of an output capacitor. Therefore, always place a capacitor of 2.2 F or more between the VOUT pin
and the VSS pin. A tantalum type capacitor is recommended. Moreover, to secure stable operation of
the S-1131 Series, it is necessary to employ a capacitor with an ESR within an optimum range (0.5 to
5 ). Using a capacitor whose ESR is outside the optimum range (approximately 0.5 to 5 ), whether
larger or smaller, may cause an unstable output, resulting in oscillation. Perform sufficient evaluation
under the actual usage conditions for selection, including evaluation of temperature characteristics.
The voltage regulator may oscillate when the impedance of the power supply is high and the input
capacitance is small or an input capacitor is not connected.
Overshoot may occur in the output voltage momentarily if the voltage is rapidly raised at power-on or
when the power supply fluctuates. Sufficiently evaluate the output voltage at power-on with the actual
device.
The application conditions for the input voltage, the output voltage, and the load current should not
exceed the package power dissipation.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
In determining the output current, attention should be paid to the output current value specified in Table
6 in “ Electrical Characteristics” and footnote *5 of the table.
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.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
16
Characteristics (Typical Data)
(1) Output voltage vs. Output current (when load current increases)
S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C)
VOUT [V]
0
0.5
1
1.5
2
2.5
0 200 400 600 800
VIN = 1.8 V
2.0 V
2.5 V
6.5 V
VOUT [V]
0
0.5
1
1.5
2
2.5
3
3.5
4
0 200 400 600 800
VIN = 3.3 V
3.5 V 4.0 V
6.5 V
IOUT [mA]
IOUT [mA]
S-1131B50 (Ta = 25°C)
VOUT [V]
0
1
2
3
4
5
6
0 200 400 600 800
VIN = 5.3 V
5.5 V
6.5 V
6.0 V
Remark In determining the output current, attention
should be paid to the following.
1) The minimum output current value and
footnote *5 of Table 6 in the “ Electrical
Characteristics”
2) The package power dissipation
IOUT [mA]
(2) Output voltage vs. Input voltage
S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C)
VOUT [V]
VOUT [V]
VIN [V]
VIN [V]
S-1131B50 (Ta = 25°C)
VOUT [V]
VIN [V]
30 mA
50 mA
80 mA
1 1.5 2 2.5 3 3.5
1.6
1.55
1.5
1.45
1.4
I
OUT
= 1 mA
2.5 3 3.5 4 4.5 5
3.05
3
2.95
2.9
2.85
2.8
30 mA
50 mA
80 mA
I
OUT
= 1 mA
4.5 5 5.5 6 6.5 7
5.1
5.08
5.06
5.04
5.02
5
4.98
4.96
4.94
4.92
4.9
30 mA
80 mA
I
OUT
= 1 mA
50 mA
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
17
(3) Dropout voltage vs. Output current
S-1131B15 S-1131B30
Vdrop [V]
25C
85C
–40C
1.0
0.8
0.6
0.4
0.2
0 50 100
150 200 250 300 350
0
Vdrop [V]
25C
85C
1.0
0.8
0.6
0.4
0.2
0 50 100 150 200 250 300 350
0
–40C
IOUT [mA]
IOUT [mA]
S-1131B50
Vdrop [V]
25C
85C
–40C
1.0
0.8
0.6
0.4
0.2
0 50 100
150 200 250 300 350
0
IOUT [mA]
(4) Dropout voltage vs. Set output voltage
Vdrop [V]
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
01234567
150 m
A
100 m
A
50 mA
30 mA
10 mA
VOUT(S) [V]
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
18
(5) Output voltage vs. Ambient temperature
S-1131B15 S-1131B30
VOUT [V]
VOUT [V]
Ta [C]
Ta [C]
S-1131B50
VOUT [V]
Ta [C]
(6) Current consumption vs. Input voltage
S-1131B15 S-1131B30
ISS1 [A]
ISS1 [A]
VIN [V] VIN [V]
S-1131B50
ISS1 [A]
VIN [V]
0 20 40 60 100
1.55
1.5
1.45
1.4
1.6
80 20
40
3.05
3
2.95
3.1
2.9
40
20 020
40 60 80 100
5.08
5.06
5.04
5.02
5
4.98
4.96
4.94
4.92
4.9
40 20 0 20 40 60 80 100
5.1
40°C
85°C
45
40
35
30
25
20
15
10
5
0
0 2 4 6 8
25°C
45
40
35
30
25
20
15
10
5
0
0 2 4 6 8
85°C
40°C
25°C
25°C
40°C
85°C
45
40
35
30
25
20
15
10
5
0
0 2 4 6 8
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.4.1_02 S-1131 Series
19
(7) Ripple rejection
S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 2.2 F VIN = 4.0 V, COUT = 2.2 F
Ripple Rejection [dB]
Ripple Rejection [dB]
Frequency [Hz]
Frequency [Hz]
S-1131B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 2.2 F
Ripple Rejection [dB]
Frequency [Hz]
100
80
60
40
20
010 100 1 k 10 k 100 k 1 M
IOUT = 1 mA
30 mA
80 mA
100
80
60
40
20
0
10 100 1 k 10 k 100 k 1 M
IOUT = 1 mA
30 mA
80 mA
10 100 1 k 10
k
100 k 1 M
IOUT = 1 m
A
30 m
A
80 m
A
100
80
60
40
20
0
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series Rev.4.1_02
20
Reference Data
(1) Input transient response characteristics
IOUT = 80 mA, tr = tf = 5.0 s, COUT = 2.2 F, CIN = 0 F IOUT = 80 mA, tr = tf = 5.0 s, COUT = 4.7 F, CIN = 0 F
VOUT [V]
-20 0 20 40 60 80 100 120 140 160 180
VIN
VOUT
VIN [V]
VOUT [V]
-20 0 20 40 60 80 100 120 140 160 180
V
IN
V
OUT
VIN [V]
t [s] t [s]
(2) Load transient response characteristics
VIN = 4.0 V, COUT = 2.2 F, CIN = 1.0 F,
IOUT = 50 mA100 mA
VIN = 4.0 V, COUT = 4.7 F, CIN = 1.0 F,
IOUT = 50 mA100 mA
VOUT [V]
-2024681012141618
V
OUT
I
OUT
IOUT [mA]
VOUT [V]
-2024681012141618
V
OUT
I
OUT
IOUT [mA]
t [s] t [s]
(3) ON/OFF pin transient response characteristics
S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 2.2 F, CIN = 1.0 F VIN = 4.0 V, COUT = 2.2 F, CIN = 1.0 F
VOUT [V]
-10 0 10 20 30 40 50 60 70 80 90
VOUT
VON/OFF
VON/OFF [V]
VOUT [V]
-10 0 10 20 30 40 50 60 70 80 90
VOU
T
VON/OFF
VON/OFF [V]
t [s] t [s]
S-1131B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 2.2 F, CIN = 1.0 F
VOUT [V]
-10 0 10 20 30 40 50 60 70 80 90
VOUT
VON/OFF
VON/OFF [V]
t [s]
3.02
3.015
3.01
3.005
3
2.995
2.99
6
5
4
3
2
1
0
3.02
3.015
3.01
3.005
3
2.995
2.99
6
5
4
3
2
1
0
3.2
3.15
3.1
3.05
3
2.95
2.9
150
100
50
0
-50
-100
-150
3.2
3.15
3.1
3.05
3
2.95
2.9
150
100
50
0
-50
-100
-150
2.5
2
1.5
1
0.5
0
-0.5
3
2
1
0
-1
-2
-3
5
4
3
2
1
0
-1
6
4
2
0
-2
-4
-6
7
6
5
4
3
2
1
0
-1
8
6
4
2
0
-2
-4
-6
-8
No.
TITLE
UNIT
ANGLE
ABLIC 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-2.0
UP003-A-P-SD-2.0
SOT893-A-PKG Dimensions
mm
No.
TITLE
UNIT
ANGLE
ABLIC 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
No. UP003-A-C-SD-2.0
UP003-A-C-SD-2.0
SOT893-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches : 40.0±0.2)
mm
No.
TITLE
UNIT
ANGLE
ABLIC 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
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
1.5±0.1 1.5±0.1
1.6±0.2
4.5±0.1
132
1.5±0.1
0.4±0.05
0.4±0.1
0.45±0.1
0.4±0.1
54
SOT895-A-PKG Dimensions
No. UP005-A-P-SD-2.0
UP005-A-P-SD-2.0
45°
0.3
mm
No.
TITLE
UNIT
ANGLE
ABLIC 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
1
32
54
No. UP005-A-C-SD-2.0
UP005-A-C-SD-2.0
SOT895-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches : 40.0±0.2)
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
16.5max.
13.0±0.3
QTY. 1,000
(60°)
(60°)
No. UP005-A-R-SD-1.1
UP005-A-R-SD-1.1
SOT895-A-Reel
Enlarged drawing in the central part
mm
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
mm
(1.5)
2.90±0.1
0.5typ.
0.95±0.05
0.30
+0.1
-0.05
0.80
+0.1
-0.05
0.15±0.05
HSON6A-A-PKG Dimensions
No. PD006-A-P-SD-5.0
PD006-A-P-SD-5.0
The exposed thermal die pad has different
electric potential depending on the product.
Confirm specifications of each product.
Do not use it as the function of electrode.
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
ø1.05±0.05
0.2±0.05
1.5±0.1
ø1.55±0.05
2.0±0.05
4.0±0.1
3.3±0.1 4.0±0.1
mm
1
3
46
Feed direction
HSON6A-A-Carrier Tape
No. PD006-A-C-SD-2.0
PD006-A-C-SD-2.0
No.
TITLE
UNIT
ANGLE
ABLIC Inc.
mm
QTY. 3,000
HSON6A-A-Reel
(60°)
(60°)
ø13±0.2
12.5max.
9.0±0.3
Enlarged drawing in the central part
No. PD006-A-R-SD-1.0
PD006-A-R-SD-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.
2.2-2018.06
www.ablic.com
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ABLIC:
S-1131B25PD-N4KTFG S-1131B15PD-N4ATFG S-1131B30PD-N4PTFG S-1131B33PD-N4STFG S-1131B27PD-
N4MTFG S-1131B18PD-N4DTFG S-1131B25UC-N4K-TF S-1131B27UC-N4M-TF S-1131B15UC-N4A-TF S-
1131B30UC-N4P-TF S-1131B25PD-N4K-TF S-1131B50UC-N5JTFU
Seiko Instruments:
S-1131B50PD-N4JTFG S-1131B50UC-N5JTFG
