Power Management ICs

5.5 V Input, 1000 mA Voltage Regulator S-13A1 Series

The S-13A1 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 2.2 μF small ceramic capacitor can be used, and the very small dropout voltage and the large output current due to the built-in transistor with low on-resistance are provided. The S-13A1 Series includes a load current protection circuit that prevents the output current from exceeding the current capacity of the output transistor and a thermal shutdown circuit that prevents damage due to overheating. In addition to the types in which output voltage is set inside the IC, a type for which output voltage can be set via an external resistor is added to a lineup. Also, the S-13A1 Series includes an inrush current limit circuit to limit the excess inrush current generated at power-on or at the time when the ON / OFF pin is set to ON. High heat radiation HSOP-8A and HSOP-6 or small SOT-89-5 packages realize high-density mounting.


Output voltage (internally set)
1.0 V to 3.5 V, selectable in 0.05 V step
Output voltage (externally set)
1.05 V to 5.0 V, settable via external resistor
Input voltage
1.5 V to 5.5 V
Output voltage accuracy
±1.0% (internally set, 1.0 V to 1.45 V output product: ±15mV)
Dropout voltage
70 mV typ. (3.0 V output product, IOUT = 300 mA)
Current consumption
During operation
60 μA typ., 90 μA max.
 During power-off
0.1 μA typ., 1.0 μA max.
Output current
Possible to output 1000 mA (VIN ≥ VOUT(S) + 1.0 V)*1
Input and output capacitors
A ceramic capacitor of 2.2 μF or more can be used.
Ripple rejection
70dB typ. (f=1.0kHz)
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Prevents damage caused by heat.
Built-in inrush current limit circuit
Limits excessive inrush current generated at power-on or at the time when the ON / OFF pin is set to ON.
For types in which output voltage is internally set, the inrush current limit time can be changed via an external capacitor (CSS).
Inrush current limit time 0.7 ms typ.
(Types in which output voltage is internally set, CSS = 1.0 nF)
Inrush current limit time 0.4 ms typ.
(Types in which output voltage is internally set, SSC pin = open)
Inrush current limit time 0.4 ms typ.
(Types in which output voltage is externally set)
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. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.


  • Constant-voltage power supply for battery-powered device
  • Constant-voltage power supply for TV, notebook PC and home electric appliance
  • Constant-voltage power supply for portable equipment

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.