XL4016E1 是开关降压型DC-DC 转换芯片；固定开关频率180KHz，可减小外部元器件尺寸，方便EMC 设计。芯片具有出色的线性调整率与负载调整率，输出电压支持1.25V~36V 间任意调节。芯片内部集成输入过压保护、过流保护、过温保护、短路保护等可靠性模块。
XL4016E1为标准TO220-5L 封装，集成度高，外围器件少，应用灵活。

Features
* Wide 8V to 40V Input Voltage Range
* Output Adjustable from 1.25V to 36V
* Maximum Duty Cycle 100%
* Minimum Drop Out 0.3V
* Fixed 180KHz Switching Frequency
* 8A Constant Output Current Capability
* Internal Optimize Power MOSFET
* High efficiency up to 96%
* Excellent line and load regulation
* Built in thermal shutdown function
* Built in current limit function
* Built in output short protection function
* Built in input over voltage protection
* Available in TO220-5L package

Applications
* LCD Monitor and LCD TV
* Portable instrument power supply
* Telecom / Networking Equipment

General Description
The XL4016 is a 180 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 8A 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 over current protection function is built inside.
When short protection function happens, the operation frequency will be reduced from 180KHz to 48KHz. An internal compensation block is built in to minimize externalcomponent count.