LP2957, LP2957A

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SNVS102C – JUNE 1998 – REVISED APRIL 2013

LP2957/LP2957A 5V Low-Dropout Regulator for µP Applications

Check for Samples: LP2957, LP2957A

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FEATURES

DESCRIPTION

The LP2957 is a 5V micropower voltage regulator

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•

5V Output within 1.4% Over Temperature (A

with

electronic

shutdown,

error

flag,

very

low

Grade)

quiescent current (150 µA typical at 1 mA load), and

•

Easily Programmed for Snap-On/Snap-Off

very low dropout voltage (470 mV typical at 250 mA

Output

load current).

•

Ensured 250 mA Output Current

Output can be wired for snap-on/snap-off operation to

•

Extremely Low Quiescent Current

eliminate transition voltage states where µP operation

may be unpredictable.

•

Low Input-Output Voltage Required for

Regulation

Output crowbar (50 mA typical pull-down current) will

•

Reverse Battery Protection

bring down the output quickly when the regulator

snaps off or when the shutdown function is activated.

•

Extremely Tight Line and Load Regulation

The part has tight line and load regulation (0.04%

•

Very Low Temperature Coefficient

typical) and low output temperature coefficient (20

•

Current and Thermal Limiting

ppm/°C typical).

•

Error Flag Signals when Output is out of

The accuracy of the 5V output is ensured at room

Regulation

temperature and over the full operating temperature

range.

APPLICATIONS

The LP2957 is available in the five-lead TO-220 and

•

High-Efficiency Linear Regulator

DDPAK/TO-263 packages.

•

Battery-Powered Regulator

Package Outline

Top View

Top View

Figure 1. Bent, Staggered Leads

Figure 2. Plastic Surface Mount Package

5-Lead TO-220 Package

5-Lead DDPAK/TO-263 Package

See Package Number NDH0005D

See Package Number KTT0005B

Side View

Figure 3. See Package Number KTT0005B

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

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

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PRODUCTION DATA information is current as of publication date.

Copyright © 1998–2013, 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.