NSC LMS1587IT-ADJ, LMS1587IT-3.3, LMS1587ISX-3.3, LMS1587IS-ADJ, LMS1587IS-3.3 Datasheet
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April 2000
LMS1585A/LMS1587
5A and 3A Low Dropout Fast Response Regulators
General Description
The LMS1585A and LMS1587 are low dropout positive regulators 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 microprocessor 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 a 3.3V fixed voltage 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 TO263 packages.
Features
nFast transient response
nAvailable in Adjustable, 1.5V, and 3.3V versions
nCurrent limiting and thermal protection
n Commercial temp. range |
0ÊC to 125ÊC |
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n Industrial temp. range |
−40ÊC to 125ÊC |
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n Line regulation |
0.005% |
(typical) |
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Load regulation |
0.05% |
(typical) |
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Direct replacement for LT™ 1585A/87 |
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Applications
nPentium™ processor supplies
nPowerPC™ supplies
nOther 2.5V to 3.6V microprocessor supplies
nLow voltage logic supplies
Typical Application
DS101197-1
Connection Diagrams
TO-220 |
TO-263 |
DS101197-36
Top View
DS101197-35
Top View
LT is a registered trademark of Linear Technology Corporation
Pentium is a registered trademark of Intel Corporation
PowerPC is a registred trademark of IBM
Regulators Response Fast Dropout Low 5A LMS1585A/LMS1587
© 2000 National Semiconductor Corporation |
DS101197 |
www.national.com |
LMS1585A/LMS1587
Ordering Information
Output |
Package |
Temperature Range |
Part Number |
Transport Media |
NSC |
Current |
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Drawing |
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3A |
TO-263 |
0ÊC to 125ÊC |
LMS1587CS-ADJ |
Rails |
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LMS1587CSX-ADJ |
Tape and Reel |
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LMS1587CS-1.5 |
Rails |
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LMS1587CSX-1.5 |
Tape and Reel |
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LMS1587CS-3.3 |
Rails |
TS3B |
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LMS1587CSX-3.3 |
Tape and Reel |
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−40ÊC to 125ÊC |
LMS1587IS-ADJ |
Rails |
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LMS1587ISX-ADJ |
Tape and Reel |
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LMS1587IS-3.3 |
Rails |
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LMS1587ISX-3.3 |
Tape and Reel |
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TO-220 |
0ÊC to 125ÊC |
LMS1587CT-ADJ |
Rails |
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LMS1587CT-3.3 |
Rails |
T03B |
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−40ÊC to 125ÊC |
LMS1587IT-ADJ |
Rails |
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LMS1587IT-3.3 |
Rails |
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5A |
TO-263 |
0ÊC to 125ÊC |
LMS1585ACS-ADJ |
Rails |
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LMS1585ACSX-ADJ |
Tape and Reel |
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LMS1585ACS-3.3 |
Rails |
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LMS1585ACSX-3.3 |
Tape and Reel |
TS3B |
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−40ÊC to 125ÊC |
LMS1585AIS-ADJ |
Rails |
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LMS1585AISX-ADJ |
Tape and Reel |
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LMS1585AIS-3.3 |
Rails |
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LMS1585AISX-3.3 |
Tape and Reel |
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TO-220 |
0ÊC to 125ÊC |
LMS1585ACT-ADJ |
Rails |
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LMS1585ACT-3.3 |
Rails |
T03B |
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−40ÊC to 125ÊC |
LMS1585AIT-ADJ |
Rails |
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LMS1585AIT-3.3 |
Rails |
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www.national.com |
2 |
Simplified Schematic
LMS1585A/LMS1587
DS101197-14
3 |
www.national.com |
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