XL4101 Datasheet | XLSEMI

Features - Wide 4.5V to 40V Input Voltage Range - Output Adjustable from 1.235V to 37V - Minimum Drop Out 1.5V - Fixed 150k Hz Switching Frequency - 3A Constant Output Current Capability - Internal Optimize Power Transistor - Excellent line and load regulation - With output constant current loop - Built in thermal shutdown function - Built in current limit function - Built in output over voltage protection - TO263-5L package General Description The XL4101 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external ponents, the regulator is simple to use and include internal frequency pensation 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. An internal pensation block is built in to minimize external ponent count. Applications - Car Charger - Battery Charger Rev 1.5 Figure1. Package Type of XL4101 .xlsemi. 1 3A 150k Hz 40V Buck Li Battery Charger Pin Configurations TO263-5L 5 4 3 2 1 CS FB GND SW VIN Metal Tab GND Figure2. Pin Configuration of XL4101 (Top View) Table 1 Pin Description Pin Number 1 2 3 4 5 Pin Name VIN SW GND FB CS Description Supply Voltage Input Pin. XL4101 operates from a 4.5V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. Ground Pin.(Note: Connected the back exposed PAD to Pin3.) Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.235V. Output Current Sense Pin. (Iload=0.155V/Rcs) Rev 1.5 .xlsemi. 2 3A 150k Hz 40V Buck Li Battery Charger Function Block 3.3V VREF 3.3V Regulator 1.235V...