DUAL LINEAR CONTROLLER
SC1538
PRELIMINARY - October 5, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech....
DUAL LINEAR CONTROLLER
SC1538
PRELIMINARY - October 5, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1538 is a dual power supply controller designed to simplify power management on motherboards. It is part of Semtech’s Smart LDO™ family of products. The SC1538CS15/18 can provide a 1.818V power supply for the I/O plane and a 1.515V power supply for the GTL+ and AGP planes. The SC1538CS25/25 can provide two 2.525V supplies for clock and memory. SC1538 features include Enable controls for each linear FET controller and over current protection. Over current protection is provided by feedback to the sense pins. If any output drops below 1V (typical) for greater than 4ms (typical), that output will shut down. The SC1538 is available in a SO-8 surface mount package.
FEATURES
Dual power supplies 1.515V Supply for GTL+ and AGP planes/1.818V Supply for chipset I/O and memory termination Dual 2.525V supplies for clock and memory Individual Enable control of each supply Over current protection
APPLICATIONS
Motherboards Simple dual power supplies
ORDERING INFORMATION
Part Number
(1)
Output
Voltages 1.515V and 1.818V 2.525V and 2.525V
Package SO-8 SO-8
SC1538CS15/18 SC1538CS25/25
BLOCK DIAGRAM
Note: (1) Add suffix ‘TR’ for tape and reel packaging.
ABSOLUTE MAXIMUM RATINGS
Parameter Input Supply
Voltage Input Pins Operating Temperature Range Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering) ...