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 sequences of BF_CUT and SLP.

The LDO draws its power from the 5V standby supply, and the N-channel MOSFET drive is derived from the 12V supply.

The SC1545 is available in the surface mount SO-8 package.

FEATURES

• 500mA LDO with Over Current Protection (OCP)

• ±2.5 LDO regulation over line, load and temperature

• Power sequencing for three supplies

APPLICATIONS

• Instantly available motherboards

• Embedded systems

• Desktop computers