SP7656EN2-L

SP7656 PowerBlox 3A, 29V Non-Synchronous Buck Converter FEATURES  W ide Input Voltage Range 4.5V – 29V  3 Amps Continuous 4 Amps Peak Output Current  Internal Compensation  Input Feedforward Control improves Transient and Regulation  600kHz Constant Frequency Operation  Low 0.6V Reference Voltage  High output setpoint accuracy of 1%  Internal Soft Start  Small SO8-EP Thermally Enhanced Package  Adjustable Overcurrent Protection  Lead Free, RoHS Compliant Package DESCRIPTION The SP7656 is a PWM controlled step down (buck) voltage mode regulator co-packaged with a PChannel FET. It operates from 4.5V to 29V making it suitable for 5V, 12V and 24V applications. The programmable overcurrent protection is based on internal FET resistance sensing and allows setting the overcurrent protection value up to a 300mV threshold (measured between VIN-LX). The SP7656 is packaged in a thermally enhanced 8-pin SO8 package making it one of the smallest converters available capable of operating from 5, 9, 12, 18 and 24VDC supplies. TYPICAL APPLICATION CIRCUIT 11/07/08 SP7656 PowerBlox Copyright 2008 EXAR Corporation 1 These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in t he operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. PVIN….............................................................. -0.3V to 30V SVIN…………………………………………..….. -0.3V to 30V Lx………………………….……………………….…-2V to 30V ISET…………………………….……………………-2V to 30V FB……………..................................................-0.3V to 5.5V Storage Temperature..…….……………..…-65 C to 150 C Junction Temperature..................................-40C to 125C Lead Temperature (Soldering, 10 sec)......…………..300 C ABSOLUTE MAXIMUM RATINGS ELECTRICAL SPECIFICATIONS Specifications are for TAMB=TJ=25C, and those denoted by ♦ apply over the full operating range, -40C< Tj