S-T111 Series HIGH RIPPLE-REJECTION www.ablic.com LOW DROPOUT CMOS VOLTAGE REGULATOR www.ablicinc.com ABLIC Inc., 2003-2015 Rev.3.1 02 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. Features Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V step Output voltage accuracy: 1.0% Dropout voltage: 190 mV typ. (3.0 V output product, I = 100 mA) OUT Current consumption: During operation: 50 A typ., 90 A max. During power-off: 0.1 A typ., 1.0 A max. *1 Output current: Possible to output 150 mA (V V 1.0 V) IN OUT(S) Input and output capacitors: A ceramic capacitor of 0.1 F or more can be used. Ripple rejection: 80 dB typ. (f = 1.0 kHz) Limits overcurrent of output transistor. Built-in overcurrent protection circuit: Built-in ON/OFF circuit: Ensures long battery life. Operation temperature range: Ta = 40C to 85C *2 Lead-free, Sn 100%, halogen-free *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. Applications 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 Package SOT-23-5 1 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-T111 Series Rev.3.1 02 Block Diagram *1 VIN VOUT Overcurrent protection circuit ON/OFF ON/OFF circuit Reference voltage circuit VSS *1. Parasitic diode Figure 1 2