SP7656 PowerBlox
3A, 29V Non-Synchronous Buck Converter
FEATURES
Wide 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 P-
Channel 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
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EXAR [ EXAR CORPORATION ]
