LP5951

VIN

OUT

GND

NC

IN

Enable Control,

active high

1

3

2

4

5

Load

EN

1 2F

1 2F

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LP5951

SNVS345G – JUNE 2006 – REVISED DECEMBER 2014

LP5951 Micropower, 150-mA Low-Dropout CMOS Voltage Regulator

1 Features

3 Description

The LP5951 regulator is designed to meet the

1

•

Input Voltage Range: 1.8 V to 5.5 V

requirements of portable battery-powered systems

•

Output Voltage Range: 1.3 V to 3.7 V

providing

a

regulated

output

voltage

and

low

•

Excellent Line Transient Response: ±2 mV

quiescent current. When switched to shutdown mode

(typical)

via a logic signal at the Enable (EN) pin, the power

consumption is reduced to virtually zero.

•

Excellent PSRR: –60 dB at 1 kHz typical

•

Low Quiescent Current of 29 µA typical

The LP5951 is designed to be stable with small 1-µF

ceramic capacitors. The device also features internal

•

Small SC70-5 and SOT-23-5 Packages

protection against short-circuit currents and over-

•

Fast Turnon Time of 30 µs typ.

temperature conditions.

•

Typical < 1 nA Quiescent Current in Shutdown

Performance is specified for a –40°C to 125°C

•

Ensured 150-mA Output Current

temperature range.

•

Logic Controlled Enable 0.4 V/0.9 V

The device is available in fixed output voltages in the

•

Good Load Transient Response of 50 mVpp

range of 1.3 V to 3.7 V. For availability, please

(typical)

contact your local TI sales office.

•

Thermal Overload and Short-Circuit Protection

Device Information(1)

•

-40°C to 125°C Junction Temperature Range

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOT-23 (5)

2.90 mm x 1.60 mm

2 Applications

LP5951

SC70 (5)

2.00 mm x 1.25 mm

General Purpose

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.