Power Management ICs

5.5 V Input, 150 mA Voltage Regulator with Reverse Current Protection S-13R1 Series

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 capacitance 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.


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.
During power-off: 0.1 μA typ., 1.0 μA max.
Output current
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.
Discharge shunt function "available" / "unavailable" is selectable.
Pull-down function "available" / "unavailable" 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.


  • 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

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.