DESCRIPTION

The SP6138 is a synchronous step-down switching regulator controller optimized for small footprint. The part is designed to be especially attractive for single supply step down conversion from 5V to 24V. The SP6138 is designed to drive a pair of external NFETs using a fixed 2.5 MHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown, output short circuit protection, and overcurrent protection with auto restart. The device also features a PWRGD output and an enable input. The SP6138 is available in a space saving 16-pin QFN and offers excellent thermal performance.

FEATURES

■ 5V to 24V Input step down converter

■ Up to 3A output in a small form factor

■ Highly integrated design, minimal components

■ UVLO Detects Both VCC and VIN

■ Overcurrent circuit protection with auto-restart

■ Power Good Output, ENABLE Input

■ Maximum Controllable Duty Cycle Ratio up to 92%

■ Wide BW amp allows Type II or III compensation

■ Programmable Soft Start

■ Fast Transient Response

■ Available in 16-Pin QFN package

■ External Driver Enable/Disable

■ U.S. Patent #6,922,041