XL4001/XL4003/XL4002/XL4004集成电路IC

2A 150kHz 40V Buck DC/DC Converter With Constant Current Loop XL4001

General Description
The XL4001 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter,
capable of driving a 2A 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.

Features
 Wide 4.5V to 40V Input Voltage Range
 Output Adjustable from 1.235V to 37V
 Minimum Drop Out 1.5V
 Fixed 150kHz Switching Frequency
 2A Constant Output Current Capability
 Internal Optimize Power Transistor
 Excellent line and load regulation
 TTL shutdown capability
 ON/OFF pin with hysteresis function
 With output constant current loop
 Built in thermal shutdown function
 Built in current limit function
 Built in output over voltage protection
 SOP8-EP (Exposed PAD) package
Applications
 Car Charger
 Battery Charger
 LED Constant Current Driver