XL4005 Datasheet | XLSEMI

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 - 5A Constant Output Current Capability - Internal Optimize Power MOSFET - High efficiency - Excellent line and load regulation - TTL shutdown capability - EN pin with hysteresis function - Built in thermal shutdown function - Built in current limit function - Built in output short protection function - Available in TO263-5L package Applications - LCD Monitor and LCD TV - Digital Photo Frame - Set-up Box - ADSL Modem - Tele / Networking Equipment General Description The XL4005 is a 300KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 5A 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 enable function, 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 pensation block is built in to minimize external ponent count. Rev 2.5 Figure1. Package Type of XL4005 .xlsemi. 1 5A 300KHz 32V Buck DC to DC Converter Pin Configurations TO263-5L 5 4 3 2 1 VIN EN SW FB GND Metal Tab SW Figure2. Pin Configuration of XL4005 (Top View) Table 1 Pin Description Pin Number 1 2 3 4 5 Pin Name GND FB SW EN VIN Description Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL4005. Feedback Pin (FB). Through an external resistor divider network, FB senses the output voltage and regulates it. The feedback threshold voltage is 0.8V. Power Switch Output...