HIGH RIPPLE-REJECTION AND SMALL PACKAGE

CMOS VOLTAGE REGULATOR

S-1323 Series

Seiko Instruments Inc.

1

The S-1323 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, 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. Small SNT-4A and SC-82AB 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 current consumption:

During operation: 70

µA typ., 90 µA max.

During shutdown: 0.1

µA typ., 1.0 µA max.

• High peak current capability:

*1

• Built-in ON/OFF circuit:

Ensures long battery life.

• Low ESR capacitor can be used: A ceramic capacitor of 1.0 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.

• Small package:

SNT-4A, SC-82AB

• 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 battery-powered devices

• Power supply for personal communication devices

• Power supply for home electric/electronic appliances

• Power supply for cellular phones

Packages

Drawing Code

Package Name

Package

Tape

Reel

Land

SNT-4A

PF004-A

PF004-A

PF004-A

PF004-A

SC-82AB

NP004-A

NP004-A

NP004-A

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