General Description
The RT9239 is a low cost, high-efficiency voltag emode PWM controller for motherboard power supply application. Synchronous N-channel MOSFET driver, short-circuit protection, and soft start function are integrated in a single chip. A simple high power buck regulator with shutdown function can be implemented with minimum external components.

FEATUREs
● Synchronous N-channel MOSFET Driver
● High Efficiency
● Fast Response with 200kHz Operating Frequency
● Adjustable Current Limit by Sensing MOSFET RDS(ON), without Extra Current Sensing Resistor
● Shutdown Function

APPLICATIONs
● Low Cost CPU Power Supply
● Motherboard I/O Power Supply
● Add-On Card Power Supply
● DDR SDRAM Bus Terminator Power Supply