Power Management ICs

6.5 V Input, 150 mA Voltage Regulator S-1112/1122 Series

The S-1112/1122 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 capacity of the output
transistor. An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the
conventional CMOS technology, a larger variety of capacitors are available, including small ceramic capacitors.
Small SNT-6A(H) (S-1112 Series only) and SOT-23-5 packages realize high-density mounting. In SOT-23-5,
the lineup includes the S-1112 and S-1122 Series, which differ in pin configuration.


Output voltage
1.5 V to 5.5 V, selectable in 0.1 V step
Output voltage accuracy
 Dropout voltage
190 mV typ. (3.0 V output product, IOUT = 100 mA)
Current consumption
During operation: 50 μA typ., 90 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
Output capacitor
A ceramic capacitor of 0.47 μF or more can be used.
Ripple rejection
80 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.


  • Constant-voltage power supply for battery-powered device
  • Constant-voltage power supply for personal communication device
  • Constant-voltage power supply for home electric appliance
  • Constant-voltage power supply for cellular phone

Standard Circuit

Standard Circuit

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.