Document
2A 52KHz 40V Buck Li Battery Charger
Datasheet XL4002
Features
Wide 4.5V to 40V Input Voltage Range Output Adjustable from 1.235V to 37V
Minimum Drop Out 1.5V
Fixed 52KHz 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
General Description
The XL4002 is a 52 KHz 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 .