LP5951

GND

NC

Enable Control,

active high

1

3

2

4

5

Load

1 PF

1 PF

LP5951

www.ti.com

SNVS345E – JUNE 2006 – REVISED JANUARY 2011

LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Regulator

Check for Samples: LP5951

1

FEATURES

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•

Excellent Line Transient Response: ±2mV typ.

•

Logic Controlled Enable 0.4V/0.9V

•

Excellent PSRR: -60dB at 1kHz typ.

•

Good Load Transient Response of 50mVpp

typ.

•

Low Quiescent Current of 29µA typ.

•

Thermal-overload and Short-circuit Protection

•

1.8 to 5.5V Input Voltage Range

•

-40°C to +125°C Junction Temperature Range

•

Small SC70-5 and SOT-23-5 Packages

•

Fast Turn-on Time of 30µs typ.

APPLICATIONS

•

Typ. < 1nA Quiescent Current in Shutdown

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General Purpose

•

Guaranteed 150mA Output Current

•

Output Voltage Range: 1.3V to 3.7V

DESCRIPTION

The LP5951 regulator is designed to meet the requirements of portable, battery-powered systems providing a

regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the

Enable pin, the power consumption is reduced to virtually zero.

The LP5951 is designed to be stable with small 1µF ceramic capacitors.

The LP5951 also features internal protection against short-circuit currents and over-temperature conditions.

Performance is specified for a -40°C to 125°C temperature range.

The device is available in SOT-23-5 and SC70-5 package.

The device is available in fixed output voltages in the range of 1.3V to 3.7V. For availability, please contact your

local TI sales office.

Typical Application Circuit

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.