VOLTAGE REGULATOR. S-T111 Datasheet
© ABLIC Inc., 2003-2015
LOW DROPOUT CMOS VOLTAGE REGULATOR
The S-T111 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.
A small SOT-23-5 package realizes high-density mounting.
Output voltage accuracy:
Input and output capacitors:
Built-in overcurrent protection circuit:
Built-in ON/OFF circuit:
Operation temperature range:
Lead-free, Sn 100%, halogen-free*2
1.5 V to 5.5 V, selectable in 0.1 V step
190 mV typ. (3.0 V output product, IOUT = 100 mA)
During operation: 50 A typ., 90 A max.
During power-off: 0.1 A typ., 1.0 A max.
Possible to output 150 mA (VIN VOUT(S) 1.0 V)*1
A ceramic capacitor of 0.1 F or more can be used.
80 dB typ. (f = 1.0 kHz)
Limits overcurrent of output transistor.
Ensures long battery life.
Ta = 40°C to 85°C
*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
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
*1. Parasitic diode