SM74503

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SNVS722A – NOVEMBER 2011 – REVISED APRIL 2013

SM74503 800mA Low-Dropout Linear Regulator

Check for Samples: SM74503

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FEATURES

DESCRIPTION

The SM74503 is a series of low dropout voltage

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•

Renewable Energy Grade

regulators with a dropout of 1.2V at 800mA of load

•

Available in 3.3V and 5V Versions

current. It has the same pin-out as TI's industry

•

Space Saving SOT-223 Package

standard LM317.

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Current Limiting and Thermal Protection

The SM74503 is available in two fixed voltages, 3.3V

•

Output Current 800mA

and 5V.

•

Line Regulation 0.2% (Max)

The SM74503 offers current limiting and thermal

shutdown. Its circuit includes a zener trimmed

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Load Regulation 0.4% (Max)

bandgap reference to assure output voltage accuracy

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Temperature Range

−40°C to 125°C

to within ±1%.

APPLICATIONS

The SM74503 series is available in SOT-223 and

PFM

packages.

A

minimum

of

10µF

tantalum

•

Photovoltaic Electronics

capacitor is required at the output to improve the

•

Post Regulator for Switching DC/DC Converter

transient response and stability.

•

High Efficiency Linear Regulators

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Battery Charger

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Battery Powered Instrumentation

Typical Application

Figure 1. Fixed Output Regulator

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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 © 2011–2013, 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.