XL4301

XLSEMI 3A 180KHz 45V Buck DC/DC Converter With Constant Current Loop Datasheet XL4301 Features „ Operation Voltage from 8V to 40V „ Adjust VOUT from 1.25V to VIN-2V „ Minimum Drop Out 0.3V „ Fixed 180KHz Switching Frequency „ Maximum 3A Switching Current „ Internal Optimize Power MOSFET „ Excellent line and load regulation „ With output constant current loop „ Built in thermal shutdown function „ Built in current limit function „ Built in output cable compensation „ Recommend output power less than 13W „ SOP8-EP (Exposed PAD) package Applications „ Car Charger „ Battery Charger „ LCD Monitor and LCD TV „ Portable instrument power supply „ Telecom / Networking Equipment „ Buck constant current driver General Description The XL4301 is a 180KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 2.5A 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. The XL4301 built in a simple, user-programmable output cable voltage drop compensation function. Use the curve in Table 2 to choose the proper compensation resistance values for cable compens...