LMS1585A/LMS1587

5A and 3A Low Dropout Fast Response Regulators

General Description

The LMS1585A and LMS1587 are low dropout positive regu-

lators with output load current of 5A and 3A respectively.

Their low dropout voltage (1.2V) and fast transient response

make them an excellent solution for low voltage micropro-

cessor applications.

The LMS1585A/87 are available in adjustable versions,

which can set the output voltage with only two external

resistors. In addition, they are also available in 1.5V and

3.3V fixed voltage versions (Note 9).

The LMS1585A/87 circuits include a zener trimmed bandgap

reference, current limiting and thermal shutdown.

The LMS1585A/87 series are available in TO-220 and TO-

263 packages.

Features

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Fast transient response

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Available in Adjustable, 1.5V, and 3.3V versions

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Current limiting and thermal protection

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Commercial temp. range

0˚C to 125˚C

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Industrial temp. range

−40˚C to 125˚C

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Line regulation

0.005% (typical)

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Load regulation

0.05% (typical)

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Applications

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Other microprocessor supplies

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Low voltage logic supplies

Typical Application

10119701

Connection Diagrams

TO-220

TO-263

10119736

Top View

10119735

Top View

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June 2005

© 2005 National Semiconductor Corporation

DS101197

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