HIGH RIPPLE-REJECTION WLP PACKAGE

LOW DROPOUT CMOS VOLTAGE REGULATOR

S-L2985 Series

Seiko Instruments Inc.

1

The S-L2985 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. A super-small

WLP-4B package realizes 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:

• 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:

*1

• Built-in ON/OFF circuit:

Ensures long battery life.

• Low ESR capacitor can be used: A ceramic capacitor of 0.47 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.

• Super-small package:

WLP-4B

• 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

Package

Package name

Drawing code

Package

Tape

Reel

WLP-4B

HB004-A

HB004-A

HB004-A