500mA SmartLDO With Power Up Signal Sequencing
PRELIMINARY - January 17, 2000
TM
SC1545
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.
semtech.
com
DESCRIPTION
The SC1545 was designed for instantly available motherboard applications.
As part of the Semtech family of SmartLDO’s it provides additional control functions not available in a standard LDO.
The device provides the capability to control three separate supplies.
There is an on-board 500mA, 2.
5V LDO with current limit protection, and drive pins for an N-channel
MOSFET and a P-channel
MOSFET.
Internal logic circuitry ensures that the system starts up in a controlled manner, and that the correct outputs are enabled during specific s...