XL4012

12A 300KHz 32V Buck DC to DC Converter Datasheet XL4012 Features „ Wide 5V to 32V Input Voltage Range „ Output Adjustable from 0.8V to 30V „ Maximum Duty Cycle 100% „ Minimum Drop Out 0.6V „ Fixed 300KHz Switching Frequency „ 12A Constant Output Current Capability „ Internal Optimize Power MOSFET „ High efficiency „ Excellent line and load regulation „ Built in thermal shutdown function „ Built in current limit function „ Built in output short protection function „ Available in TO-220 package Applications „ LCD Monitor and LCD TV „ Digital Photo Frame „ Set-up Box „ ADSL Modem „ Telecom / Networking Equipment General Description The XL4012 is a 300 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 12A 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 over current protection function is built inside. When short protection function happens, the operation frequency will be reduced from 300KHz to 60KHz. An internal compensation block is built in to minimize external component count. Figure1. Package Type of XL4012 12A 300KHz 32V Buck DC to DC Converter Pin Configurations Datasheet XL4012 Figure2. Pin Configuration of XL4012 (Top View) Table 1 Pin Description Pin Number 1 2 3 ...