5A and 3A Low Dropout Fast Response Regulators
Description
LMS1585A/LMS1587 5A Low Dropout Fast Response Regulators
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
n n n n n n n n Fast transient response Available in Adjustable, 1.
5V, and 3.
3V versions Current limiting and thermal protection Commercial temp.
range 0˚C to 125˚C Industrial temp.
range −40˚C to 125˚C Line regulation 0.
005% (typical) Load regulation 0.
05% (typical) Direct replacement for LT™1585A/87
Applications
n n n n Pentium™ processor supplies PowerPC™ supplies Other 2.
5V to 3.
6V microprocessor supplies Low 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
© 2000 National Semiconductor Corporation
DS101197
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national.
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LMS1585A/LMS1587
Ordering Information
Output Current 3A Package TO-263 Temperature Range 0˚C to 125˚C Part Number LMS1587CS-ADJ LMS1587CSX-ADJ LMS1587CS-1.
5 LMS1587CSX-1.
5 LMS1587CS-3.
3 LMS1587CSX-3.
3 −40˚C to 125˚C LMS1587IS-ADJ LMS1587ISX-ADJ LMS1587IS-3.
3 LMS1587ISX-3.
3 TO-220 0˚C to 125˚C −40˚C to 125˚C 5A TO-263 0˚C to 125˚C LMS1587CT-ADJ LMS1587CT-3.
3 LMS1587IT-ADJ LMS1587IT-3.
3 LMS1585ACS-ADJ LMS1585ACSX-ADJ LMS1585...
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