Description

The SC4614 is a high-speed, voltage mode PWM controller that provides the control and protection features necessary for a synchronous buck converter.

The SC4614 is designed to directly drive the top and bottom MOSFETs of the buck converter. It allows the converter to operate at 500kHz switching frequency with 4V to 25V power rail and as low as 0.5V output. It uses an internal 8.2V supply as the gate drive voltage for minimum driver power loss and MOSFET switching loss.

Features

♦ 500kHz switching frequency

♦ 4V to 25V power rails

♦ 0.5V voltage reference for programmable output voltages

♦ Internal LDO for optimum gate drive voltage

♦ 1.5A gate drive current

♦ Adaptive non-overlapping gate drives provide shoot-through protection for MOSFETs

♦ Internal soft start

♦ Hiccup mode short circuit protection

♦ Power rail under voltage lockout

♦ MSOP-10 package, fully RoHS and WEEE compliant

Applications

♦ Embedded, low cost, high efficiency converters

♦ Point of load power supplies

♦ Set top box power supplies

♦ PDP/TFT TVs

♦ Consumer electronics