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:

1.Wide 4.5V to 40V Input Voltage Range
2.Output Adjustable from 1.235V to 37V
3.Minimum Drop Out 1.5V
4.Fixed 150kHz Switching Frequency
5.2A Constant Output Current Capability
6.Internal Optimize Power Transistor
7.Excellent line and load regulation
8.TTL shutdown capability
9.ON/OFF pin with hysteresis function
10.With output constant current loop
11.Built in thermal shutdown function
12.Built in current limit function
13.Built in output over voltage protection
14.SOP8-EP (Exposed PAD) package