S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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S-13R1 Series
www.sii-ic.com
© Seiko Instruments Inc., 2012-2014
REVERSE CURRENT PROTECTION
CMOS VOLTAGE REGULATOR
Rev.1.2_00
The S-13R1 Series, developed by using the CMOS technology, is a positive voltage regulator IC of 150 mA output current,
which has low dropout voltage, high-accuracy output voltage and low current consumption.
Even with low current consumption of 5 μA typ., it has high ripple-rejection of 70 dB typ., and a ceramic capacitor of 1.0 μF or
more can be used as the input and output capacitors.
The S-13R1 Series includes an overcurrent protection circuit that prevents the load current from exceeding the current
capacity of the output transistor and a thermal shutdown circuit that prevents damage because of overheating.
Due to the built-in reverse current protection function, the reverse current flowing from the VOUT pin to the VIN pin can be
controlled as the small value 0.09 μA max. Therefore, IC protection diode is not needed.
Features
Output voltage:
1.2 V to 4.0 V, selectable in 0.05 V step
Input voltage:
2.0 V to 5.5 V
Output voltage accuracy:
±1.0% (1.2 V to 1.45 V output product: ±15 mV)
Dropout voltage:
150 mV typ. (3.0 V output product, IOUT = 100 mA)
Current consumption:
During operation: 5 μA typ., 9 μA max.
Output current:
During power-off: 0.1 μA typ., 1.0 μA max.
Possible to output 150 mA (VIN VOUT(S) + 1.0 V)*1
Input and output capacitors:
A ceramic capacitor of 1.0 μF or more can be used.
Ripple rejection:
70 dB typ. (3.0 V output product, f = 1.0 kHz)
Reverse current protection function:
IREV = 0.09 μA max.
Built-in overcurrent protection circuit:
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit:
Prevents damage caused by heat.
Built-in ON / OFF circuit:
Ensures long battery life.
Constant current source pull-down is selectable.
Discharge shunt function is selectable.
Operation temperature range:
Ta = 40°C to +85°C
Lead-free (Sn 100%), halogen-free
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
Constant-voltage power supply for battery-powered device
Constant-voltage power supply for portable equipment
Constant-voltage power supply for home electric appliance
Constant-voltage power supply for mobile phone
Packages
SOT-23-5
SC-82AB
HSNT-4 (1010)
Seiko Instruments Inc.
1


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
Block Diagrams
1. S-13R1 Series A type
Reverse current
detection circuit
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Constant current
source pull-down
Status
Active "H"
Available
Available
ON / OFF
ON / OFF
circuit
+
Reference
voltage
circuit
*1
*1
VSS
*1. Parasitic diode
2. S-13R1 Series B type
Figure 1
Reverse current
detection circuit
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Constant current
source pull-down
Status
Active "H"
Available
Unavailable
ON / OFF
VSS
*1. Parasitic diode
ON / OFF
circuit
+
Reference
voltage
circuit
*1
*1
Figure 2
2 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
3. S-13R1 Series C type
Reverse current
detection circuit
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Constant current
source pull-down
Status
Active "H"
Unavailable
Available
ON / OFF
ON / OFF
circuit
+
Reference
voltage
circuit
*1
VSS
*1. Parasitic diode
4. S-13R1 Series D type
Figure 3
Reverse current
detection circuit
VIN
Overcurrent
protection circuit
Thermal shutdown circuit
VOUT
Function
ON / OFF logic
Discharge shunt
function
Constant current
source pull-down
Status
Active "H"
Unavailable
Unavailable
ON / OFF
ON / OFF
circuit
+
Reference
voltage
circuit
*1
VSS
*1. Parasitic diode
Figure 4
Seiko Instruments Inc.
3


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
Product Name Structure
Users can select the product type, output voltage, and package type for the S-13R1 Series. Refer to "1. Product
name" regarding the contents of product name, "2. Function list of product types" regarding the product type,
"3. Packages" regarding the package drawings, "4. Product name lists" regarding details of the product name.
1. Product name
S-13R1 x xx - xxxx U 3
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
M5T1: SOT-23-5, Tape
N4T1: SC-82AB, Tape
A4T2: HSNT-4 (1010), Tape
Output voltage*2
12 to 40
(e.g., when the output voltage is 1.2 V, it is expressed as 12.)
Product type*3
A to D
*1. Refer to the tape drawing.
*2. If you request the product which has 0.05 V step, contact our sales office.
*3. Refer to "2. Function list of product types".
2. Function list of product types
Product Type
A
B
C
D
ON / OFF Logic
Active "H"
Active "H"
Active "H"
Active "H"
Table 1
Discharge Shunt Function
Available
Available
Unavailable
Unavailable
Constant Current Source Pull-down
Available
Unavailable
Available
Unavailable
3. Packages
Package Name
SOT-23-5
SC-82AB
HSNT-4 (1010)
Table 2
Dimension
MP005-A-P-SD
NP004-A-P-SD
PL004-A-P-SD
Package Drawing Codes
Tape
Reel
MP005-A-C-SD
MP005-A-R-SD
NP004-A-C-SD
NP004-A-C-S1
NP004-A-R-SD
PL004-A-C-SD
PL004-A-R-SD
Land
PL004-A-L-SD
4 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
4. Product name lists
4. 1 S-13R1 Series A type
ON / OFF logic:
Discharge shunt function:
Active "H"
Available
Constant current source pull-down: Available
Table 3
Output Voltage
SOT-23-5
SC-82AB
HSNT-4 (1010)
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
3.6 V ± 1.0%
3.7 V ± 1.0%
3.8 V ± 1.0%
3.9 V ± 1.0%
4.0 V ± 1.0%
S-13R1A12-M5T1U3
S-13R1A13-M5T1U3
S-13R1A14-M5T1U3
S-13R1A15-M5T1U3
S-13R1A16-M5T1U3
S-13R1A17-M5T1U3
S-13R1A18-M5T1U3
S-13R1A1J-M5T1U3
S-13R1A19-M5T1U3
S-13R1A20-M5T1U3
S-13R1A21-M5T1U3
S-13R1A22-M5T1U3
S-13R1A23-M5T1U3
S-13R1A24-M5T1U3
S-13R1A25-M5T1U3
S-13R1A26-M5T1U3
S-13R1A27-M5T1U3
S-13R1A28-M5T1U3
S-13R1A2J-M5T1U3
S-13R1A29-M5T1U3
S-13R1A30-M5T1U3
S-13R1A31-M5T1U3
S-13R1A32-M5T1U3
S-13R1A33-M5T1U3
S-13R1A34-M5T1U3
S-13R1A35-M5T1U3
S-13R1A36-M5T1U3
S-13R1A37-M5T1U3
S-13R1A38-M5T1U3
S-13R1A39-M5T1U3
S-13R1A40-M5T1U3
S-13R1A12-N4T1U3
S-13R1A13-N4T1U3
S-13R1A14-N4T1U3
S-13R1A15-N4T1U3
S-13R1A16-N4T1U3
S-13R1A17-N4T1U3
S-13R1A18-N4T1U3
S-13R1A1J-N4T1U3
S-13R1A19-N4T1U3
S-13R1A20-N4T1U3
S-13R1A21-N4T1U3
S-13R1A22-N4T1U3
S-13R1A23-N4T1U3
S-13R1A24-N4T1U3
S-13R1A25-N4T1U3
S-13R1A26-N4T1U3
S-13R1A27-N4T1U3
S-13R1A28-N4T1U3
S-13R1A2J-N4T1U3
S-13R1A29-N4T1U3
S-13R1A30-N4T1U3
S-13R1A31-N4T1U3
S-13R1A32-N4T1U3
S-13R1A33-N4T1U3
S-13R1A34-N4T1U3
S-13R1A35-N4T1U3
S-13R1A36-N4T1U3
S-13R1A37-N4T1U3
S-13R1A38-N4T1U3
S-13R1A39-N4T1U3
S-13R1A40-N4T1U3
S-13R1A12-A4T2U3
S-13R1A13-A4T2U3
S-13R1A14-A4T2U3
S-13R1A15-A4T2U3
S-13R1A16-A4T2U3
S-13R1A17-A4T2U3
S-13R1A18-A4T2U3
S-13R1A1J-A4T2U3
S-13R1A19-A4T2U3
S-13R1A20-A4T2U3
S-13R1A21-A4T2U3
S-13R1A22-A4T2U3
S-13R1A23-A4T2U3
S-13R1A24-A4T2U3
S-13R1A25-A4T2U3
S-13R1A26-A4T2U3
S-13R1A27-A4T2U3
S-13R1A28-A4T2U3
S-13R1A2J-A4T2U3
S-13R1A29-A4T2U3
S-13R1A30-A4T2U3
S-13R1A31-A4T2U3
S-13R1A32-A4T2U3
S-13R1A33-A4T2U3
S-13R1A34-A4T2U3
S-13R1A35-A4T2U3
S-13R1A36-A4T2U3
S-13R1A37-A4T2U3
S-13R1A38-A4T2U3
S-13R1A39-A4T2U3
S-13R1A40-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
Seiko Instruments Inc.
5


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
4. 2 S-13R1 Series B type
ON / OFF logic:
Discharge shunt function:
Active "H"
Available
Constant current source pull-down: Unavailable
Table 4
Output Voltage
SOT-23-5
SC-82AB
HSNT-4 (1010)
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
3.6 V ± 1.0%
3.7 V ± 1.0%
3.8 V ± 1.0%
3.9 V ± 1.0%
4.0 V ± 1.0%
S-13R1B12-M5T1U3
S-13R1B13-M5T1U3
S-13R1B14-M5T1U3
S-13R1B15-M5T1U3
S-13R1B16-M5T1U3
S-13R1B17-M5T1U3
S-13R1B18-M5T1U3
S-13R1B1J-M5T1U3
S-13R1B19-M5T1U3
S-13R1B20-M5T1U3
S-13R1B21-M5T1U3
S-13R1B22-M5T1U3
S-13R1B23-M5T1U3
S-13R1B24-M5T1U3
S-13R1B25-M5T1U3
S-13R1B26-M5T1U3
S-13R1B27-M5T1U3
S-13R1B28-M5T1U3
S-13R1B2J-M5T1U3
S-13R1B29-M5T1U3
S-13R1B30-M5T1U3
S-13R1B31-M5T1U3
S-13R1B32-M5T1U3
S-13R1B33-M5T1U3
S-13R1B34-M5T1U3
S-13R1B35-M5T1U3
S-13R1B36-M5T1U3
S-13R1B37-M5T1U3
S-13R1B38-M5T1U3
S-13R1B39-M5T1U3
S-13R1B40-M5T1U3
S-13R1B12-N4T1U3
S-13R1B13-N4T1U3
S-13R1B14-N4T1U3
S-13R1B15-N4T1U3
S-13R1B16-N4T1U3
S-13R1B17-N4T1U3
S-13R1B18-N4T1U3
S-13R1B1J-N4T1U3
S-13R1B19-N4T1U3
S-13R1B20-N4T1U3
S-13R1B21-N4T1U3
S-13R1B22-N4T1U3
S-13R1B23-N4T1U3
S-13R1B24-N4T1U3
S-13R1B25-N4T1U3
S-13R1B26-N4T1U3
S-13R1B27-N4T1U3
S-13R1B28-N4T1U3
S-13R1B2J-N4T1U3
S-13R1B29-N4T1U3
S-13R1B30-N4T1U3
S-13R1B31-N4T1U3
S-13R1B32-N4T1U3
S-13R1B33-N4T1U3
S-13R1B34-N4T1U3
S-13R1B35-N4T1U3
S-13R1B36-N4T1U3
S-13R1B37-N4T1U3
S-13R1B38-N4T1U3
S-13R1B39-N4T1U3
S-13R1B40-N4T1U3
S-13R1B12-A4T2U3
S-13R1B13-A4T2U3
S-13R1B14-A4T2U3
S-13R1B15-A4T2U3
S-13R1B16-A4T2U3
S-13R1B17-A4T2U3
S-13R1B18-A4T2U3
S-13R1B1J-A4T2U3
S-13R1B19-A4T2U3
S-13R1B20-A4T2U3
S-13R1B21-A4T2U3
S-13R1B22-A4T2U3
S-13R1B23-A4T2U3
S-13R1B24-A4T2U3
S-13R1B25-A4T2U3
S-13R1B26-A4T2U3
S-13R1B27-A4T2U3
S-13R1B28-A4T2U3
S-13R1B2J-A4T2U3
S-13R1B29-A4T2U3
S-13R1B30-A4T2U3
S-13R1B31-A4T2U3
S-13R1B32-A4T2U3
S-13R1B33-A4T2U3
S-13R1B34-A4T2U3
S-13R1B35-A4T2U3
S-13R1B36-A4T2U3
S-13R1B37-A4T2U3
S-13R1B38-A4T2U3
S-13R1B39-A4T2U3
S-13R1B40-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
6 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

No Preview Available !

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
4. 3 S-13R1 Series C type
ON / OFF logic:
Discharge shunt function:
Active "H"
Unavailable
Constant current source pull-down: Available
Table 5
Output Voltage
SOT-23-5
SC-82AB
HSNT-4 (1010)
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
3.6 V ± 1.0%
3.7 V ± 1.0%
3.8 V ± 1.0%
3.9 V ± 1.0%
4.0 V ± 1.0%
S-13R1C12-M5T1U3
S-13R1C13-M5T1U3
S-13R1C14-M5T1U3
S-13R1C15-M5T1U3
S-13R1C16-M5T1U3
S-13R1C17-M5T1U3
S-13R1C18-M5T1U3
S-13R1C1J-M5T1U3
S-13R1C19-M5T1U3
S-13R1C20-M5T1U3
S-13R1C21-M5T1U3
S-13R1C22-M5T1U3
S-13R1C23-M5T1U3
S-13R1C24-M5T1U3
S-13R1C25-M5T1U3
S-13R1C26-M5T1U3
S-13R1C27-M5T1U3
S-13R1C28-M5T1U3
S-13R1C2J-M5T1U3
S-13R1C29-M5T1U3
S-13R1C30-M5T1U3
S-13R1C31-M5T1U3
S-13R1C32-M5T1U3
S-13R1C33-M5T1U3
S-13R1C34-M5T1U3
S-13R1C35-M5T1U3
S-13R1C36-M5T1U3
S-13R1C37-M5T1U3
S-13R1C38-M5T1U3
S-13R1C39-M5T1U3
S-13R1C40-M5T1U3
S-13R1C12-N4T1U3
S-13R1C13-N4T1U3
S-13R1C14-N4T1U3
S-13R1C15-N4T1U3
S-13R1C16-N4T1U3
S-13R1C17-N4T1U3
S-13R1C18-N4T1U3
S-13R1C1J-N4T1U3
S-13R1C19-N4T1U3
S-13R1C20-N4T1U3
S-13R1C21-N4T1U3
S-13R1C22-N4T1U3
S-13R1C23-N4T1U3
S-13R1C24-N4T1U3
S-13R1C25-N4T1U3
S-13R1C26-N4T1U3
S-13R1C27-N4T1U3
S-13R1C28-N4T1U3
S-13R1C2J-N4T1U3
S-13R1C29-N4T1U3
S-13R1C30-N4T1U3
S-13R1C31-N4T1U3
S-13R1C32-N4T1U3
S-13R1C33-N4T1U3
S-13R1C34-N4T1U3
S-13R1C35-N4T1U3
S-13R1C36-N4T1U3
S-13R1C37-N4T1U3
S-13R1C38-N4T1U3
S-13R1C39-N4T1U3
S-13R1C40-N4T1U3
S-13R1C12-A4T2U3
S-13R1C13-A4T2U3
S-13R1C14-A4T2U3
S-13R1C15-A4T2U3
S-13R1C16-A4T2U3
S-13R1C17-A4T2U3
S-13R1C18-A4T2U3
S-13R1C1J-A4T2U3
S-13R1C19-A4T2U3
S-13R1C20-A4T2U3
S-13R1C21-A4T2U3
S-13R1C22-A4T2U3
S-13R1C23-A4T2U3
S-13R1C24-A4T2U3
S-13R1C25-A4T2U3
S-13R1C26-A4T2U3
S-13R1C27-A4T2U3
S-13R1C28-A4T2U3
S-13R1C2J-A4T2U3
S-13R1C29-A4T2U3
S-13R1C30-A4T2U3
S-13R1C31-A4T2U3
S-13R1C32-A4T2U3
S-13R1C33-A4T2U3
S-13R1C34-A4T2U3
S-13R1C35-A4T2U3
S-13R1C36-A4T2U3
S-13R1C37-A4T2U3
S-13R1C38-A4T2U3
S-13R1C39-A4T2U3
S-13R1C40-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
Seiko Instruments Inc.
7


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
4. 4 S-13R1 Series D type
ON / OFF logic:
Discharge shunt function:
Active "H"
Unavailable
Constant current source pull-down: Unavailable
Table 6
Output Voltage
SOT-23-5
SC-82AB
HSNT-4 (1010)
1.2 V ± 15 mV
1.3 V ± 15 mV
1.4 V ± 15 mV
1.5 V ± 1.0%
1.6 V ± 1.0%
1.7 V ± 1.0%
1.8 V ± 1.0%
1.85 V ± 1.0%
1.9 V ± 1.0%
2.0 V ± 1.0%
2.1 V ± 1.0%
2.2 V ± 1.0%
2.3 V ± 1.0%
2.4 V ± 1.0%
2.5 V ± 1.0%
2.6 V ± 1.0%
2.7 V ± 1.0%
2.8 V ± 1.0%
2.85 V ± 1.0%
2.9 V ± 1.0%
3.0 V ± 1.0%
3.1 V ± 1.0%
3.2 V ± 1.0%
3.3 V ± 1.0%
3.4 V ± 1.0%
3.5 V ± 1.0%
3.6 V ± 1.0%
3.7 V ± 1.0%
3.8 V ± 1.0%
3.9 V ± 1.0%
4.0 V ± 1.0%
S-13R1D12-M5T1U3
S-13R1D13-M5T1U3
S-13R1D14-M5T1U3
S-13R1D15-M5T1U3
S-13R1D16-M5T1U3
S-13R1D17-M5T1U3
S-13R1D18-M5T1U3
S-13R1D1J-M5T1U3
S-13R1D19-M5T1U3
S-13R1D20-M5T1U3
S-13R1D21-M5T1U3
S-13R1D22-M5T1U3
S-13R1D23-M5T1U3
S-13R1D24-M5T1U3
S-13R1D25-M5T1U3
S-13R1D26-M5T1U3
S-13R1D27-M5T1U3
S-13R1D28-M5T1U3
S-13R1D2J-M5T1U3
S-13R1D29-M5T1U3
S-13R1D30-M5T1U3
S-13R1D31-M5T1U3
S-13R1D32-M5T1U3
S-13R1D33-M5T1U3
S-13R1D34-M5T1U3
S-13R1D35-M5T1U3
S-13R1D36-M5T1U3
S-13R1D37-M5T1U3
S-13R1D38-M5T1U3
S-13R1D39-M5T1U3
S-13R1D40-M5T1U3
S-13R1D12-N4T1U3
S-13R1D13-N4T1U3
S-13R1D14-N4T1U3
S-13R1D15-N4T1U3
S-13R1D16-N4T1U3
S-13R1D17-N4T1U3
S-13R1D18-N4T1U3
S-13R1D1J-N4T1U3
S-13R1D19-N4T1U3
S-13R1D20-N4T1U3
S-13R1D21-N4T1U3
S-13R1D22-N4T1U3
S-13R1D23-N4T1U3
S-13R1D24-N4T1U3
S-13R1D25-N4T1U3
S-13R1D26-N4T1U3
S-13R1D27-N4T1U3
S-13R1D28-N4T1U3
S-13R1D2J-N4T1U3
S-13R1D29-N4T1U3
S-13R1D30-N4T1U3
S-13R1D31-N4T1U3
S-13R1D32-N4T1U3
S-13R1D33-N4T1U3
S-13R1D34-N4T1U3
S-13R1D35-N4T1U3
S-13R1D36-N4T1U3
S-13R1D37-N4T1U3
S-13R1D38-N4T1U3
S-13R1D39-N4T1U3
S-13R1D40-N4T1U3
S-13R1D12-A4T2U3
S-13R1D13-A4T2U3
S-13R1D14-A4T2U3
S-13R1D15-A4T2U3
S-13R1D16-A4T2U3
S-13R1D17-A4T2U3
S-13R1D18-A4T2U3
S-13R1D1J-A4T2U3
S-13R1D19-A4T2U3
S-13R1D20-A4T2U3
S-13R1D21-A4T2U3
S-13R1D22-A4T2U3
S-13R1D23-A4T2U3
S-13R1D24-A4T2U3
S-13R1D25-A4T2U3
S-13R1D26-A4T2U3
S-13R1D27-A4T2U3
S-13R1D28-A4T2U3
S-13R1D2J-A4T2U3
S-13R1D29-A4T2U3
S-13R1D30-A4T2U3
S-13R1D31-A4T2U3
S-13R1D32-A4T2U3
S-13R1D33-A4T2U3
S-13R1D34-A4T2U3
S-13R1D35-A4T2U3
S-13R1D36-A4T2U3
S-13R1D37-A4T2U3
S-13R1D38-A4T2U3
S-13R1D39-A4T2U3
S-13R1D40-A4T2U3
Remark Please contact our sales office for products with specifications other than the above.
8 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Pin Configurations
1. SOT-23-5
Top view
54
123
Figure 5
Table 7
Pin No.
Symbol
Description
1 VIN
Input voltage pin
2 VSS
GND pin
3 ON / OFF ON / OFF pin
4 NC*1 No connection
5
VOUT
Output voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
2. SC-82AB
Top view
43
12
Figure 6
3. HSNT-4 (1010)
Top view
14
23
Bottom view
41
32
*1
*1. Connect the heat sink of backside at
shadowed area to the board, and set
electric potential open or GND.
However, do not use it as the function
of electrode.
Figure 7
Pin No.
1
2
3
4
Pin No.
1
2
3
4
Table 8
Symbol
Description
ON / OFF ON / OFF pin
VSS
GND pin
VOUT
Output voltage pin
VIN Input voltage pin
Table 9
Symbol
Description
VOUT
Output voltage pin
VSS
GND pin
ON / OFF ON / OFF pin
VIN Input voltage pin
Seiko Instruments Inc.
9


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
Absolute Maximum Ratings
Table 10
Item Symbol
Input voltage
Output voltage
Output current
SOT-23-5
VIN
VON / OFF
VOUT
IOUT
Power dissipation SC-82AB
PD
HSNT-4 (1010)
Operation ambient temperature
Storage temperature
*1. When mounted on board
Topr
Tstg
[Mounted board]
(1) Board size:
(2) Name:
114.3 mm × 76.2 mm × t1.6 mm
JEDEC STANDARD51-7
(Ta = +25°C unless otherwise specified)
Absolute Maximum Rating
Unit
VSS 0.3 to VSS + 6.0
VSS 0.3 to VSS + 6.0
VSS 0.3 to VSS + 6.0
200
600*1
400*1
340*1
V
V
V
mA
mW
mW
mW
40 to +85
°C
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.
1200
1000
800
600
SOT-23-5
SC-82AB
HSNT-4 (1010)
400
200
0
0 50 100 150
Ambient Temperature (Ta) [°C]
Figure 8 Power Dissipation of Package (When Mounted on Board)
10 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Power Dissipation of HSNT-4 (1010) (Reference)
Power dissipation of package differs depending on the mounting conditions.
Consider the power dissipation characteristics under the following conditions as reference.
[Mounted board]
(1) Board size:
(2) Board material:
(3) Wiring ratio:
(4) Test conditions:
(5) Land pattern:
40 mm × 40 mm × t0.8 mm
Glass epoxy resin (four layers)
50%
When mounted on board (wind speed: 0 m/s)
Refer to the recommended land pattern (drawing code: PL004-A-L-SD)
1200
1000
800
600
400
200
0
0 50 100 150
Ambient Temperature (Ta) [°C]
Figure 9 Power Dissipation of Package (When Mounted on Board)
Condition
HSNT-4 (1010) (When mounted on board)
Table 11
Power Dissipation (Reference)
870 mW
Thermal Resistance Value (θja)
115°C/W
Seiko Instruments Inc.
11


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
Electrical Characteristics
Item
Output voltage*1
Output current*2
Dropout voltage*3
Line regulation
Load regulation
Output voltage
temperature
coefficient*4
Current consumption
during operation
Reverse current
Current consumption
during power-off
Input voltage
ON / OFF pin
input voltage "H"
ON / OFF pin
input voltage "L"
ON / OFF pin
input current "H"
ON / OFF pin
input current "L"
Ripple rejection
Limit current
Short-circuit current
Thermal shutdown
detection temperature
Thermal shutdown
release temperature
Table 12 (1 /2)
Symbol
Condition
VOUT(E)
VIN = VOUT(S) + 1.0 V, 1.2 V VOUT(S) < 1.5 V
IOUT = 30 mA
1.5 V VOUT(S) 4.0 V
IOUT
VIN VOUT(S) + 1.0 V
1.2 V VOUT(S) < 1.3 V
1.3 V VOUT(S) < 1.4 V
1.4 V VOUT(S) < 1.5 V
1.5 V VOUT(S) < 1.6 V
Vdrop
IOUT = 100 mA
1.6 V VOUT(S) < 1.7 V
1.7 V VOUT(S) < 1.8 V
1.8 V VOUT(S) < 2.0 V
2.0 V VOUT(S) < 2.8 V
2.8 V VOUT(S) < 3.0 V
3.0 V VOUT(S) 4.0 V
ΔVOUT1
2.0 V VIN 5.5 V,
IOUT = 30 mA
1.2 V VOUT(S) < 1.5 V
ΔVINVOUT
VOUT(S) + 0.5 V VIN 5.5 V,
IOUT = 30 mA
1.5
V
VOUT(S)
4.0
V
ΔVOUT2 VIN = VOUT(S) + 1.0 V, 10 μA IOUT 100 mA
ΔVOUT VIN = VOUT(S) + 1.0 V, IOUT = 100 mA,
ΔTaVOUT 40°C Ta ≤ +85°C
ISS1
VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON,
no load
IREV
0 V VIN < VOUT
ISS2
VIN = VOUT(S) + 1.0 V, ON / OFF pin = OFF,
no load
VIN
VSH
VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ,
determined by VOUT output level
VSL
VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ,
determined by VOUT output level
B / D type
(without constant current
ISH
VIN = 5.5 V,
VON / OFF = 5.5 V
source pull-down)
A / C type
(with constant current
source pull-down)
ISL
|RR|
ILIM
Ishort
VIN = VOUT(S) + 1.0 V, VON / OFF = 0 V
VIN = VOUT(S) + 1.0 V, f = 1.0 kHz,
ΔVrip = 0.5 Vrms, IOUT = 100 mA
VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON
VIN = VOUT(S) + 1.0 V, ON / OFF pin = ON,
VOUT = 0 V
TSD Junction temperature
TSR Junction temperature
(Ta = +25°C unless otherwise specified)
Min.
Typ.
Max.
Unit
Test
Circuit
VOUT(S)
0.015
VOUT(S)
VOUT(S)
+ 0.015
V
1
VOUT(S)
× 0.99
150*5
VOUT(S)
VOUT(S)
× 1.01
V
mA
1
3
0.80 0.84 0.88 V
1
0.74 0.78 V 1
0.64 0.68 V 1
0.54 0.58 V 1
0.44 0.48 V 1
0.34 0.38 V 1
0.24 0.28 V 1
0.19 0.28 V 1
0.17 0.23 V 1
0.15 0.23 V 1
0.05 0.2 %/V 1
0.05 0.2 %/V 1
25 40 mV 1
− ±100 ppm/°C 1
5.0 9.0 μA
− − 0.09 μA
0.1 1.0 μA
2.0 5.5 V
1.0
V
− − 0.3 V
0.1
0.1 μA
2
6
2
4
4
4
0.05 0.10 0.20 μA 4
0.1
70
200 250
30
150
120
0.1 μA
dB
400 mA
mA
− °C
− °C
4
5
3
3
12 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Item
"L" output Nch ON
resistance
Reverse current
protection mode
detection voltage
Reverse current
protection mode
release voltage
Symbol
RLOW
VREVD
VIN = 5.5 V,
VOUT = 0.1 V
Table 12 (2 /2)
Condition
A / B type
(with discharge shunt function)
(Ta = +25°C unless otherwise specified)
Min.
Typ.
Max.
Unit
Test
Circuit
35 − Ω 3
0 V VIN 5.5 V, VOUT 0.5 V,
VREVD = VIN VOUT
20 45 100 mV 6
VREVR
0 V VIN 5.5 V, VOUT 0.5 V,
VREVR = VIN VOUT
50 75 120 mV 6
*1. VOUT(S): Set output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT (= 30 mA) and inputting VOUT(S) + 1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop = VIN1 (VOUT3 × 0.98)
VOUT3 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.
ΔVOUT
ΔTa
[mV/°C]*1 = VOUT(S) [V]*2 ×
ΔVOUT
ΔTaVOUT
[ppm/°C]*3 ÷ 1000
*1. Change in temperature of 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.
Seiko Instruments Inc.
13


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Test Circuits
VIN VOUT
ON / OFF
Set to ON
VSS
Figure 10 Test Circuit 1
+
A VIN
VOUT
ON / OFF
VSS
Set to VIN or GND
Figure 11 Test Circuit 2
VIN VOUT
ON / OFF
Set to ON
VSS
Figure 12 Test Circuit 3
+
A
+
V
+
A
+
V
VIN VOUT
+
A ON / OFF
VSS
+
V RL
Figure 13 Test Circuit 4
VIN VOUT
ON / OFF
Set to ON
VSS
+
V RL
Figure 14 Test Circuit 5
VIN VOUT
ON / OFF
Set to ON
VSS
+
A
+
V
Figure 15 Test Circuit 6
14 Seiko Instruments Inc.
Rev.1.2_00


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Standard Circuit
Input
CIN*1
VIN VOUT
ON / OFF
VSS
Output
CL*2
Single GND
GND
*1. CIN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 1.0 μF or more can be used as CL.
Figure 16
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):
Output capacitor (CL):
1.0 μF or more
1.0 μF or more
Caution Generally a series regulator may cause oscillation, depending on the selection of external parts.
Confirm that no oscillation occurs in the application for which the above capacitors are used.
Selection of Input and Output Capacitors (CIN, CL)
The S-13R1 Series requires an output capacitor between the VOUT pin and the VSS pin for phase compensation.
Operation is stabilized by a ceramic capacitor with an output capacitance of 1.0 μF or more over the entire temperature
range. When using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capacitor, the capacitance must
be 1.0 μF or more.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on the application.
The recommended capacitance for an application is CIN 1.0 μF, CL 1.0 μF; however, when selecting the output
capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual device.
Seiko Instruments Inc.
15


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
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% or ±15 mV*1 under the specified conditions of fixed input
voltage*2, fixed output current, and fixed temperature.
*1. When VOUT(S) < 1.5 V: ±15 mV, when VOUT(S) 1.5 V: ±1.0%
*2. Differs depending on 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
ΔVOUT1
ΔVINVOUT
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output
voltage changes due to a change in the input voltage with the output current remaining unchanged.
4. Load regulation (ΔVOUT2)
Indicates the dependency of the output voltage on the output current. That is, the values show 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)
16 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
6.
Output
voltage temperature
coefficient
ΔVOUT
ΔTaVOUT
The shaded area in Figure 17 is the range where VOUT varies in the operation temperature range when the output
voltage temperature coefficient is ±100 ppm/°C.
VOUT
[V]
Example of S-13R1A30 typ. product
+0.30 mV/°C
VOUT(E)*1
0.30 mV/°C
40 +25 +85 Ta [°C]
*1. VOUT(E) is the value of the output voltage measured at Ta = +25°C.
Figure 17
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa
[mV/°C]*1 = VOUT(S) [V]*2 ×
ΔVOUT
ΔTaVOUT
[ppm/°C]*3 ÷ 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
Seiko Instruments Inc.
17


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
Operation
1. Basic operation
Figure 18 shows the block diagram of the S-13R1 Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage
resistance-divided by feedback resistors (Rs, 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.
VIN
Current
supply
Vref
Error
amplifier
+
Reference voltage
circuit
*1
Rf
Vfb
Rs
VOUT
VSS
*1. Parasitic diode
Figure 18
2. Output transistor
In the S-13R1 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Since there exists a parasitic diode between the VIN pin and the VOUT pin, the reverse current arises when potential of
VOUT becomes higher than VIN. However, the reverse current detection circuit prevents the current from flowing from
the VOUT pin in the S-13R1 Series. Therefore, the IC is not damaged even when the potential of VOUT becomes higher
than VIN.
18 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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Rev.1.2_00
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
3. ON / OFF pin
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.
Note that the current consumption increases when a voltage of 0.3 V to 1.0 V is applied to the ON / OFF pin. The
ON / OFF pin is configured as shown in Figure 19 and Figure 20.
3. 1 S-13R1 Series A / C type
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS
level.
3. 2 S-13R1 Series B / D type
The ON / OFF pin is not internally pulled down to the VSS pin, so do not use this pin in the floating status. When
not using the ON / OFF pin, connect the pin to the VIN pin.
Table 13
Product Type ON / OFF Pin
Internal Circuit
VOUT Pin Voltage
Current Consumption
A / B / C / D "H": ON
Operate
Set value
ISS1*1
A/B
"L": OFF
Stop
VSS level
ISS2
C/D
"L": OFF
Stop
High-Z VSS level
ISS2
*1. Note that the IC’s current consumption increases as much as current flows into the constant current of
0.1 μA typ. when the ON / OFF pin is connected to the VIN pin and the S-13R1 Series A / C type is
operating (refer to Figure 19).
VIN VIN
ON / OFF
ON / OFF
VSS
Figure 19 S-13R1 Series A / C type
VSS
Figure 20 S-13R1 Series B / D type
Seiko Instruments Inc.
19


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
4. Discharge shunt function (S-13R1 Series A / B type)
The S-13R1 Series A / B type has a built-in discharge shunt circuit to discharge the output capacitance.
The output capacitance is discharged as follows so that the VOUT pin reaches the VSS level.
(1) The ON / OFF pin is set to OFF level.
(2) The output transistor is turned off.
(3) The discharge shunt circuit is turned on.
(4) The output capacitor discharges.
Since the S-13R1 Series C / D type does not have a discharge shunt circuit, the VOUT pin is not discharged. The
S-13R1 Series A / B type allows the VOUT pin to reach the VSS level rapidly due to the discharge shunt circuit.
Output transistor: OFF
S-13R1 Series
VOUT
VIN
ON / OFF
ON / OFF circuit
ON / OFF Pin
: OFF
Discharge shunt circuit
: ON
Current flow
*1
Output
capacitor
(CL)
VSS
GND
*1. Parasitic diode
Figure 21
5. Constant current source pull-down (S-13R1 Series A / C type)
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS level.
Note that the IC's current consumption increases as much as current flows into the constant current of 0.1 μA typ.
when the ON / OFF pin is connected to the VIN pin and the S-13R1 Series A / C type is operating.
20 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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S-13R1 Series
6. Overcurrent protection circuit
The S-13R1 Series has an overcurrent protection circuit having the characteristics shown in "1. Output voltage vs.
Output current (When load current increases) (Ta = +25°C)" in "Characteristics (Typical Data)", in order to
protect the output transistor against an excessive output current and short circuiting between the VOUT pin and the
VSS pin. The current (Ishort) when the output pin is short-circuited is internally set at approx. 30 mA typ., and the normal
value is restored for the output voltage, if releasing a short circuit once.
Caution This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps
short circuiting inside, pay attention to the conditions of input voltage and load current so that,
under the usage conditions including short circuit, the loss of the IC will not exceed power
dissipation of the package.
7. Thermal shutdown circuit
The S-13R1 Series has a thermal shutdown circuit to protect the device from damage due to overheat. When the
junction temperature rises to 150°C typ., the thermal shutdown circuit operates to stop regulating. When the junction
temperature drops to 120°C typ., the thermal shutdown circuit is released to restart regulating.
Due to self-heating of the S-13R1 Series, if the thermal shutdown circuit starts operating, it stops regulating so that
the output voltage drops. When regulation stops, the S-13R1 Series does not itself generate heat and the IC's
temperature drops. When the temperature drops, the thermal shutdown circuit is released to restart regulating, thus
the S-13R1 Series generates heat again. Repeating this procedure makes the waveform of the output voltage into a
pulse-like form. Stop or restart of regulation continues unless decreasing either or both of the input voltage and the
output current in order to reduce the internal power consumption, or decreasing the ambient temperature.
Table 14
Thermal Shutdown Circuit
Operate: 150°C typ.*1
Release: 120°C typ.*1
VOUT Pin Voltage
VSS level
Set value
*1. Junction temperature
Seiko Instruments Inc.
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S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
8. Reverse current protection function
8. 1 Detection and release of reverse current protection mode
The reverse current protection function compares values of the VIN pin voltage (VIN) and the VOUT pin voltage
(VOUT), and prevents the current from flowing to the VIN pin and the VSS pin from the VOUT pin. Also, in the
S-13R1 Series A / B type, the current flows from the VOUT pin to the VSS pin due to a discharge shunt circuit.
During the reverse current protection mode, the connection direction of parasitic diode of the output transistor is
switched by the reverse current protection circuit, and the feedback resistors (Rs, Rf) and the VSS pin are
disconnected.
The reverse current is prevented by switching the reverse current protection mode before VIN becomes lower than
VOUT.
As shown in Figure 24, in the case of VIN VOUT > VREVD, the S-13R1 Series is in normal operation mode. The
reverse current protection mode is detected when VIN VOUT VREVD.
In order to insure the stable operation, there is also a hysteresis for detection and release of the reverse current
protection mode. Therefore, the reverse current protection mode is released when VIN VOUT VREVR.
The reverse current detection circuit operates at 0 V VIN 5.5 V and VOUT 0.5 V.
Current flow
VIN
Current
supply
Error
amplifier
+
VIN
Current
supply
Reverse current
detection circuit
Rf
VOUT
Error
amplifier
+
Reverse current
detection circuit
Rf
Reference voltage
circuit
VSS
Reference voltage
Rs circuit
VSS
Rs
VOUT
Reverse
current
(IREV)
Current
flow
Figure 22 Normal Operation Mode
Figure 23 Reverse Current Protection Mode
VIN
VOUT + VREVR
VOUT + VREVD
VOUT
Reverse current protection
mode detection voltage (VREVD)
Reverse current protection
mode release voltage (VREVR)
Normal operation mode
Reverse current protection mode
Figure 24
Normal operation mode
22 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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S-13R1 Series
8. 2 Power-on (ON / OFF pin = ON)
At power-on, the reverse current protection mode and the normal operation mode may be repeated during the time
period of VIN VOUT VREVD.
VIN = VON / OFF
VIN VOUT
VOUT
Reverse current protection mode
/ normal operation mode
Normal operation mode
Figure 25
Seiko Instruments Inc.
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S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
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 the 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 (10 μA or
less).
If the S-13R1 Series is used at low load current (several hundred nA), the output voltage may increase due to the
leakage current from an output driver at high temperature, and the reverse current protection mode may not be
released. Perform sufficient evaluation with the actual device in use.
Note that the output voltage may increase due to the leakage current from an output driver even if the ON / OFF pin is
at OFF level when a series regulator is used at high temperature.
Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for the S-13R1 Series. However, be sure to perform sufficient evaluation under the
actual usage conditions for selection, including evaluation of temperature characteristics. Refer to "5. Example of
equivalent series resistance vs. Output current characteristics (Ta = +25°C)" in "Reference Data" for the
equivalent series resistance (RESR) of the output capacitor.
Input capacitor (CIN): 1.0 μF or more
Output capacitor (CL): 1.0 μF or more
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.
If the output capacitance is small, power supply's fluctuation and the characteristics of load fluctuation become worse.
Sufficiently evaluate the output voltage's fluctuation with the actual device.
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 12 in
"Electrical Characteristics" and footnote *5 of the table.
SII 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.
24 Seiko Instruments Inc.


S-13R1 (Seiko)
REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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S-13R1 Series
Characteristics (Typical Data)
1. Output voltage vs. Output current (When load current increases) (Ta = +25°C)
1. 1 VOUT(S) = 1.2 V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
VIN = 2.0 V
VIN = 2.2 V
VIN = 3.2 V
VIN = 5.5 V
50 100 150 200 250 300 350 400
IOUT [mA]
1. 2 VOUT(S) = 3.0 V
3.6
3.0
2.4 VIN = 3.5 V
1.8
VIN = 4.0 V
VIN = 5.0 V
1.2 VIN = 5.5 V
0.6
0
0
50 100 150 200 250 300 350 400
IOUT [mA]
1. 3 VOUT(S) = 4.0 V
4.5
3.6
2.7 VIN = 4.5 V
VIN = 5.0 V
1.8 VIN = 5.5 V
0.9
0
0
50 100 150 200 250 300 350 400
IOUT [mA]
Remark
In determining the output current, attention should
be paid to the following.
1. The minimum output current value and
footnote *5 of Table 12 in "Electrical
Characteristics"
2. The package power dissipation
2. Output voltage vs. Input voltage (Ta = +25°C)
2. 1 VOUT(S) = 1.2 V
1.5
1.2
0.9 IOUT = 100 mA
0.6 IOUT = 30 mA
IOUT = 1 mA
0.3 IOUT = 100 μA
0
0123456
VIN [V]
2. 3 VOUT(S) = 4.0 V
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
1
IOUT = 100 mA
IOUT = 30 mA
IOUT = 1 mA
IOUT = 100 μA
234
VIN [V]
5
6
2. 2 VOUT(S) = 3.0 V
3.6
3.0
2.4
1.8
1.2
0.6
0
0
1
IOUT = 100 mA
IOUT = 30 mA
IOUT = 1 mA
IOUT = 100 μA
234
VIN [V]
5
6
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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
3. Dropout voltage vs. Output current
3. 1 VOUT(S) = 1.2 V
0.50
0.45
0.40
Ta = +85°C
0.35
Ta = +25°C
0.30
0.25
Ta = 40°C
0.20
0.15
0.10
0.05
0
0 25 50 75 100 125 150
IOUT [mA]
3. 3 VOUT(S) = 4.0 V
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
Ta = +85°C
Ta = +25°C
Ta = 40°C
25 50 75 100 125 150
IOUT [mA]
3. 2 VOUT(S) = 3.0 V
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
Ta = +85°C
Ta = +25°C
Ta = 40°C
25 50 75 100 125 150
IOUT [mA]
4. Dropout voltage vs. Set output voltage
0.50
0.45
0.40
0.35
0.30
0.25
0.20
IOUT = 150 mA
IOUT = 100 mA
IOUT = 30 mA
IOUT = 10 mA
IOUT = 1 mA
0.15
0.10
0.05
0
1.0 1.6 2.2 2.8 3.4 4.0
VOUT(S) [V]
Remark In dashed line areas, the reverse current protection mode and the normal operation mode are repeated.
26 Seiko Instruments Inc.


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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
5. Output voltage vs. Ambient temperature
5. 1 VOUT(S) = 1.2 V
1.32
1.26
1.20
1.14
1.08
40 25
0 25
Ta [°C]
5. 3 VOUT(S) = 4.0 V
4.20
50
75 85
4.10
4.00
3.90
3.80
40 25
0 25 50
Ta [°C]
75 85
5. 2 VOUT(S) = 3.0 V
3.30
3.15
3.00
2.85
2.70
40 25
0 25 50
Ta [°C]
75 85
6. Current consumption vs. Input voltage
6. 1 VOUT(S) = 1.2 V
10
8
6
Ta = +85°C
Ta = +25°C
4
2 Ta = 40°C
0
0123456
VIN [V]
6. 3 VOUT(S) = 4.0 V
10
8
6 Ta = +85°C
Ta = +25°C
4 Ta = 40°C
2
0
0123456
VIN [V]
6. 2 VOUT(S) = 3.0 V
10
8
6 Ta = +85°C
4
Ta = +25°C
Ta = 40°C
2
0
0123456
VIN [V]
Seiko Instruments Inc.
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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR
S-13R1 Series
Rev.1.2_00
7. Reverse current vs. VOUT pin voltage
7. 1 VIN = 0 V
100
80
60
Ta = +85°C
Ta = +25°C
40
20 Ta = 40°C
0
0123456
VOUT [V]
8. Ripple rejection (Ta = +25°C)
8. 1 VOUT(S) = 1.2 V
120
VIN = 2.2 V, CL = 1.0 μF
100
80
60
40
20
0
10
IOUT = 1 mA
IOUT = 30 mA
IOUT = 100 mA
IOUT = 150 mA
100 1k 10k 100k
Frequency [Hz]
1M
8. 3 VOUT(S) = 4.0 V
120
VIN = 5.0 V, CL = 1.0 μF
100
80
60
40
20
0
10
IOUT = 1 mA
IOUT = 30 mA
IOUT = 100 mA
IOUT = 150 mA
100 1k 10k 100k
Frequency [Hz]
1M
8. 2 VOUT(S) = 3.0 V
120
VIN = 4.0 V, CL = 1.0 μF
100
80
60
40
20
0
10
IOUT = 1 mA
IOUT = 30 mA
IOUT = 100 mA
IOUT = 150 mA
100 1k 10k 100k
Frequency [Hz]
1M
28 Seiko Instruments Inc.


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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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S-13R1 Series
Reference Data
1. Transient response characteristics when input (Ta = +25°C)
1. 1 VOUT(S) = 1.2 V
IOUT = 30 mA, CIN = CL = 1.0 μF, VIN = 2.2 V 3.2 V, tr = tf = 5.0 μs
1.40 4.0
1.35 3.5
1.30 3.0
1.25
1.20
1.15
VIN
VOUT
2.5
2.0
1.5
1.10 1.0
1.05 0.5
1.00 0
400 200 0 200 400 600 800
t [μs]
1. 3 VOUT(S) = 4.0 V
IOUT = 30 mA, CIN = CL = 1.0 μF, VIN = 5.0 V 5.5 V, tr = tf = 5.0 μs
4.15 7.0
4.10
4.05
VIN
6.0
5.0
4.00
3.95
VOUT
4.0
3.0
3.90 2.0
3.85 1.0
3.80 0
400 200 0 200 400 600 800
t [μs]
1. 2 VOUT(S) = 3.0 V
IOUT = 30 mA, CIN = CL = 1.0 μF, VIN = 4.0 V 5.0 V, tr = tf = 5.0 μs
3.20 7.0
3.15 6.0
3.10
3.05
VIN
5.0
4.0
3.00
2.95
VOUT
3.0
2.0
2.90 1.0
2.85 0
400 200 0 200 400 600 800
t [μs]
2. Transient response characteristics of load (Ta = +25°C)
2. 1 VOUT(S) = 1.2 V
VIN = 2.2 V, CIN = CL = 1.0 μF, IOUT = 50 mA 100 mA
VIN = 2.2 V, CIN = CL = 1.0 μF, IOUT = 1 mA 150 mA
1.40
1.35
1.30 IOUT
1.25
1.20
1.15
VOUT
1.10
1.05
1.00
200 100
0
2. 2 VOUT(S) = 3.0 V
200
100
0
100
200
300
400
500
600
100 200 300 400
t [μs]
2.00
1.80
1.60
1.40
IOUT
1.20
1.00
VOUT
0.80
0.60
200 100
0
200
100
0
100
200
300
400
500
100 200 300 400 500
t [μs]
VIN = 4.0 V, CIN = CL = 1.0 μF, IOUT = 50 mA 100 mA
3.20 200
3.15 100
3.10 IOUT
0
3.05 100
3.00
2.95
VOUT
200
300
2.90 400
2.85 500
2.80 600
400 200 0 200 400 600 800
t [μs]
VIN = 4.0 V, CIN = CL = 1.0 μF, IOUT = 1 mA 150 mA
3.80
3.60
3.40
3.20
IOUT
3.00
2.80
VOUT
2.60
2.40
2.20
400 200
0
200
100
0
100
200
300
400
500
600
200 400 600 800 1000
t [μs]
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REVERSE CURRENT PROTECTION CMOS VOLTAGE REGULATOR

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S-13R1 Series
Rev.1.2_00
2. 3 VOUT(S) = 4.0 V
VIN = 5.0 V, CIN = CL = 1.0 μF, IOUT = 50 mA 100 mA
4.20 200
4.15 100
4.10 IOUT
0
4.05 100
4.00
3.95
VOUT
200
300
3.90 400
3.85 500
3.80 600
400 200 0 200 400 600 800
t [μs]
VIN = 5.0 V, CIN = CL = 1.0 μF, IOUT = 1 mA 150 mA
4.60 200
4.40
4.20
IOUT
100
0
4.00
3.80
VOUT
100
200
3.60 300
3.40 400
3.20 500
3.00 600
800 400 0 400 800 1200 1600
t [μs]
3. Transient response characteristics of ON / OFF pin when rising (Ta = +25°C)
3. 1 VOUT(S) = 1.2 V
VIN = 2.2 V, CIN = CL = 1.0 μF, IOUT = 100 mA,
VON / OFF = 0 V 2.2 V, tr = 1.0 μs
56
44
VON / OFF
32
3. 2 VOUT(S) = 3.0 V
VIN = 4.0 V, CIN = CL = 1.0 μF, IOUT = 100 mA,
VON / OFF = 0 V 4.0 V, tr = 1.0 μs
56
4
VON / OFF
4
3
VOUT
2
2 02
VOUT
1 2 1
0
2
0 4
0 100 200 300 400 500 600
t [μs]
3. 3 VOUT(S) = 4.0 V
VIN = 5.0 V, CIN = CL = 1.0 μF, IOUT = 100 mA,
VON / OFF = 0 V 5.0 V, tr = 1.0 μs
56
0
0
4
200 400 600 800 1000 1200 1400
t [μs]
44
3
VON / OFF
VOUT
2
20
1 2
0
0
4
200 400 600 800 1000 1200 1400
t [μs]
30 Seiko Instruments Inc.




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