XL4501

XLSEMI 5A 150KHz 36V Buck DC/DC Converter With Constant Current Loop Datasheet XL4501 Features n Wide 8V to 36V Input Voltage Range n Output Adjustable from 1.25V to 32V n Minimum Drop Out 0.3V n Fixed 150KHz Switching Frequency n Maximum 5A Switching Current n Internal Optimize Power MOSFET n Excellent line and load regulation n With output constant current loop n Built in thermal shutdown function n Built in current limit function n Available in TO263-5L package Applications n Car Charger n Battery Charger n LCD Monitor and LCD TV n Portable instrument power supply n Telecom / Networking Equipment n Buck constant current driver n Monitor LED Backlighting n General purpose LED lighting General Description The XL4501 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 4.5A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. An internal compensation block is built in to minimize external component count. Rev1.0 Figure1. Package Type of XL4501 www.xlsemi.com 1 XLSEMI 5A 150KHz 36V Buck DC/DC Converter With Constant Current Loop Pin Configurations Datasheet XL4501 Figure2. Pin Configuration of XL4501 (...