LMS1585 National Semiconductor, LMS1585 Datasheet

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LMS1585

Manufacturer Part Number
LMS1585
Description
5A and 3A Low Dropout Fast Response Regulators
Manufacturer
National Semiconductor
Datasheet

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© 2000 National Semiconductor Corporation
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 resis-
tors. In addition, they are also available in a 3.3V fixed volt-
age version (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.
Typical Application
Connection Diagrams
LT is a registered trademark of Linear Technology Corporation
Pentium is a registered trademark of Intel Corporation
PowerPC is a registred trademark of IBM
Top View
TO-220
DS101197-36
DS101197
Features
n Fast transient response
n Available in Adjustable, 1.5V, and 3.3V versions
n Current limiting and thermal protection
n Commercial temp. range
n Industrial temp. range
n Line regulation
n Load regulation
n Direct replacement for LT
Applications
n Pentium
n PowerPC
n Other 2.5V to 3.6V microprocessor supplies
n Low voltage logic supplies
processor supplies
supplies
DS101197-1
Top View
TO-263
1585A/87
DS101197-35
0.005% (typical)
−40˚C to 125˚C
0.05% (typical)
www.national.com
0˚C to 125˚C
April 2000

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LMS1585 Summary of contents

Page 1

... In addition, they are also available in a 3.3V fixed volt- age version (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. Typical Application Connection Diagrams TO-220 ...

Page 2

... LMS1587CT-ADJ LMS1587CT-3.3 LMS1587IT-ADJ LMS1587IT-3.3 0˚C to 125˚C LMS1585ACS-ADJ LMS1585ACSX-ADJ LMS1585ACS-3.3 LMS1585ACSX-3.3 LMS1585AIS-ADJ LMS1585AISX-ADJ LMS1585AIS-3.3 LMS1585AISX-3.3 0˚C to 125˚C LMS1585ACT-ADJ LMS1585ACT-3.3 LMS1585AIT-ADJ LMS1585AIT-3.3 2 Transport Media NSC Drawing Rails Tape and Reel Rails Tape and Reel Rails TS3B Tape and Reel ...

Page 3

Simplified Schematic 3 DS101197-14 www.national.com ...

Page 4

... OUT OUT LMS1587-1 5V OUT LMS1587-3 5V OUT LMS1585A-ADJ/LMS1587-ADJ REF OUT LMS1585A-3.3/LMS1587-3.3/LMS1587-1 1 OUT OUT LMS1585A-ADJ REF OUT LMS1585A-3 1 OUT OUT LMS1585A-ADJ/LMS1585A-3.3 V −V = 5.5V IN OUT LMS1587-ADJ/LMS1587-3.3 V − ...

Page 5

... Guaranteed maximum power dissipation will not be available over the full input/output range. Note 7: The minimum output current required to maintain regulation. Note for LMS1585A and 3A for LMS1587. FULLLOAD Note 9: Consult factory for other fixed voltage options. ...

Page 6

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 3-Lead TO-263 Package NSC Package Number TS3B 6 ...

Page 7

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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