1W LED驱动 XL4011E1

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