NSC LMS1587IT-ADJ, LMS1587IT-3.3, LMS1587ISX-3.3, LMS1587IS-ADJ, LMS1587IS-3.3 Datasheet
...
LMS1585A/LMS1587
5A and 3A Low Dropout Fast Response Regulators
LMS1585A/LMS1587 5A Low Dropout Fast Response Regulators
April 2000
General Description
The LMS1585AandLMS1587arelowdropoutpositiveregulators 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.
Typical Application
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 0˚C to 125˚C
n Industrial temp. range −40˚C to 125˚C
n Line regulation 0.005% (typical)
n Load regulation 0.05% (typical)
n Direct replacement for LT
™
1585A/87
Applications
n Pentium™processor supplies
n PowerPC
n Other 2.5V to 3.6V microprocessor supplies
n Low voltage logic supplies
™
supplies
Connection Diagrams
TO-220
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
DS101197-1
TO-263
DS101197-36
DS101197-35
Top View
© 2000 National Semiconductor Corporation DS101197 www.national.com
Ordering Information
Output
Current
3A TO-263 0˚C to 125˚C LMS1587CS-ADJ Rails
LMS1585A/LMS1587
5A TO-263 0˚C to 125˚C LMS1585ACS-ADJ Rails
Package Temperature Range Part Number Transport Media NSC
LMS1587CSX-ADJ Tape and Reel
LMS1587CS-1.5 Rails
LMS1587CSX-1.5 Tape and Reel
LMS1587CS-3.3 Rails
LMS1587CSX-3.3 Tape and Reel
−40˚C to 125˚C LMS1587IS-ADJ Rails
LMS1587ISX-ADJ Tape and Reel
LMS1587IS-3.3 Rails
LMS1587ISX-3.3 Tape and Reel
TO-220 0˚C to 125˚C LMS1587CT-ADJ Rails
LMS1587CT-3.3 Rails
−40˚C to 125˚C LMS1587IT-ADJ Rails
LMS1587IT-3.3 Rails
LMS1585ACSX-ADJ Tape and Reel
LMS1585ACS-3.3 Rails
LMS1585ACSX-3.3 Tape and Reel
−40˚C to 125˚C LMS1585AIS-ADJ Rails
LMS1585AISX-ADJ Tape and Reel
LMS1585AIS-3.3 Rails
LMS1585AISX-3.3 Tape and Reel
TO-220 0˚C to 125˚C LMS1585ACT-ADJ Rails
LMS1585ACT-3.3 Rails
−40˚C to 125˚C LMS1585AIT-ADJ Rails
LMS1585AIT-3.3 Rails
Drawing
TS3B
T03B
TS3B
T03B
www.national.com 2
Simplified Schematic
LMS1585A/LMS1587
DS101197-14
www.national.com3
Loading...