LP3992

Micropower 1.5V CMOS Voltage Regulator with

Shutdown Control

General Description

The LP3992 regulator is designed to meet the requirements

of portable, battery-powered systems providing an accurate

output voltage, low noise, and low quiescent current. Battery

life will be prolonged by the ability of the LP3992 to provide

a 1.5V output from the low input voltage of 1.9V. Additionally,

when switched to a shutdown mode via a logic signal at the

shutdown pin, the power consumption is reduced to virtually

zero. The LP3992 also features short-circuit and thermal-

shutdown protection.

The LP3992 is designed to be stable with space saving

ceramic capacitors as small as 1.0µF.

The device is available in an SOT23-5 package. Perfor-

mance is specified for a -40˚C to 125˚C temperature range.

For output voltages other than 1.5V and alternative package

options, please contact your local NSC sales office.

Key Specifications

n

1.9 to 5.2V input range

n

n

Less than 1.5µA quiescent current in shutdown

n

Stable with a 1µF output capacitor

n

Guaranteed 30mA output current

n

Low output voltage Noise; 300µV

RMS

Features

n

Operation from a low input voltage; 1.9V

n

Low quiescent current; 29µA typical

n

Stable with a ceramic capacitor

n

Logic controlled shutdown

n

Fast turn ON and OFF

n

Thermal-overload and short circuit protection

n

5 pin package, SOT23

n

-40˚C to +125˚C junction temperature range

Typical Application Circuit

20041201

December 2002

© 2002 National Semiconductor Corporation

DS200412

www.national.com