LM330

3-Terminal Positive Regulator

General Description

The LM330 5V 3-terminal positive voltage regulator features

an ability to source 150 mA of output current with an

input-output differential of 0.6V or less. Familiar regulator

features such as current limit and thermal overload protec-

tion are also provided.

The low dropout voltage makes the LM330 useful for certain

battery applications since this feature allows a longer battery

discharge before the output falls out of regulation. For ex-

ample, a battery supplying the regulator input voltage may

discharge to 5.6V and still properly regulate the system and

load voltage. Supporting this feature, the LM330 protects

both itself and regulated systems from negative voltage in-

puts resulting from reverse installations of batteries.

Other protection features include line transient protection up

to 26V, when the output actually shuts down to avoid damag-

ing internal and external circuits. Also, the LM330 regulator

cannot be harmed by a temporary mirror-image insertion.

Features

n Input-output differential less than 0.6V

n Output current of 150 mA

n Reverse battery protection

n Line transient protection

n Internal short circuit current limit

n Internal thermal overload protection

n Mirror-image insertion protection

n P

Schematic and Connection Diagrams

DS009306-1

(TO-220)

Plastic Package

DS009306-2

Front View

Order Number LM330T-5.0

See NS Package Number T03B

May 1998

© 1999 National Semiconductor Corporation

DS009306

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