LM1084IS-12 National Semiconductor, LM1084IS-12 Datasheet

LM1084IS-12

Manufacturer Part Number

LM1084IS-12

Description

5A Low Dropout Positive Regulators

Manufacturer

National Semiconductor

Datasheet

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LM1084

5A Low Dropout Positive Regulators

General Description

The LM1084 is a series of low dropout voltage positive regu-

lators with a maximum dropout of 1.5V at 5A of load current.

It has the same pin-out as National Semiconductor’s industry

standard LM317.

The LM1084 is available in an adjustable version, which can

set the output voltage with only two external resistors. It is

also available in three fixed voltages: 3.3V, 5.0V and 12.0V.

The fixed versions intergrate the adjust resistors.

The LM1084 circuit includes a zener trimmed bandgap refer-

ence, current limiting and thermal shutdown.

The LM1084 series is available in TO-220 and TO-263 pack-

ages.

Connection Diagrams

Basic Functional Diagram, Adjustable Version

Top View

TO-220

DS100946-36

DS100946

Features

n Available in 3.3V, 5.0V, 12V and Adjustable Versions

n Current Limiting and Thermal Protection

n Output Current

n Industrial Temperature Range

n Line Regulation

n Load Regulation

Applications

n Post Regulator for Switching DC/DC Conveter

n High Efficiency Linear Regulators

n Battery Charger

DS100946-65

Top View

TO-263

DS100946-35

September 1999

0.015% (typical)

−40˚C to 125˚C

0.1% (typical)

www.national.com

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