SM74503 Datasheet, PDF (2/16 Pages) Texas Instruments – 800mA Low-Dropout Linear Regulator

SM74503
November 30, 2011
800mA Low-Dropout Linear Regulator
General Description
The SM74503 is a series of low dropout voltage regulators
with a dropout of 1.2V at 800mA of load current. It has the
same pin-out as National Semiconductor's industry standard
LM317.
The SM74503 is available in two fixed voltages, 3.3V and 5V.
The SM74503 offers current limiting and thermal shutdown.
Its circuit includes a zener trimmed bandgap reference to as-
sure output voltage accuracy to within ±1%.
The SM74503 series is available in SOT-223 and TO-252 D-
PAK packages. A minimum of 10µF tantalum capacitor is
required at the output to improve the transient response and
stability.
Features
■ ^{Renewable Energy Grade}
■ ^{Available in 3.3V and 5V Versions}
■ ^{Space Saving SOT-223 Package}
■ ^{Current Limiting and Thermal Protection}
■ ^{Output Current}
800mA
■ ^{Line Regulation}
0.2% (Max)
■ ^{Load Regulation}
0.4% (Max)
■ ^{Temperature Range}
−40°C to 125°C
Applications
■ ^{Photovoltaic Electronics}
■ ^{Post Regulator for Switching DC/DC Converter}
■ ^{High Efficiency Linear Regulators}
■ ^{Battery Charger}
■ ^{Battery Powered Instrumentation}
Typical Application
Fixed Output Regulator
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