The S-1170 Series is a positive voltage regulator with a low dropout voltage, 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, a built-in overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor, and a built-in thermal shutdown circuit prevents damage caused by the heat. 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. Small SOT-89-5 and 6-Pin HSON(A) packages realize high-density mounting.

■ Features

• Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V steps.

• High-accuracy output voltage: ±1.0

• Low dropout voltage: 120 mV typ. (3.0 V output product, IOUT = 300 mA)

• Low current consumption: During operation: 80 µA typ., 160 µA max.

During shutdown: 0.1 µA typ., 1.0 µA max.

• High current capability: 800 mA output is possible (at 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 4.7 µF or more can be used for the output capacitor.

• High ripple rejection: 70 dB typ. (at 1.0 kHz)

• Built-in overcurrent protector: Overcurrent of output transistor can be restricted.

• Built-in thermal shutdown circuit: Damage caused by heat can be prevented.

• Small package: SOT-89-5, 6-Pin HSON(A)

• Lead-free products

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

■ Applications

• Power supply for DVD and CD-ROM drives

• Power supply for battery-powered devices

• Power supply for personal communication device

• Power supply for note PCs