Power Management ICs

6.5 V Input, 150 mA Voltage Regulator S-T111 Series

The S-T111 Series is a positive voltage regulator with a low dropout voltage (LDO), high output voltage accuracy, 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 protector prevents the load current from exceeding the current capacitance of the output transistor. An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the conventional CMOS process, a larger variety of capacitors are available, including small ceramic capacitors. A small SOT-23-5 package realizes high-density mounting.


Output voltage
1.5 V to 5.5 V, selectable in 0.1 V steps.
High-accuracy output voltage
Low dropout voltage (LDO)
190 mV typ. (3.0 V output product, Iout =100 mA)
Low current consumption
During operation 50 µA typ. 90 µA max.,
During shutdown 0.1 µA typ. 1.0 µA max.
High peak current capability
150 mA output is possible (@ Vin >Vout(S) +1.0 V) *1
Built-in ON/OFF circuit
Ensures long battery life.
Low ESR capacitor can be used
A ceramic capacitor of 0.1 µF or more can be used for the output capacitor.
High ripple rejection
80 dB typ. (@ 1.0 kHz)
Built-in overcurrent protector
Overcurrent of output transistor can be restricted.
Lead-free products

*1. Attention should be paid to the power dissipation of the package when the output current is large.


  • Power supply for battery-powered devices
  • Power supply for personal communication devices
  • Power supply for home electric/electronic appliances
  • Power supply for cellular phones

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.