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XL4012

Xlsemi
Part Number XL4012
Manufacturer Xlsemi
Description 12A 300KHz 32V Buck DC to DC Converter
Published Feb 27, 2015
Detailed Description 12A 300KHz 32V Buck DC to DC Converter Datasheet XL4012 Features „ Wide 5V to 32V Input Voltage Range „ Output Adjusta...
Datasheet PDF File XL4012 PDF File

XL4012
XL4012

Overview
12A 300KHz 32V Buck DC to DC Converter Datasheet XL4012 Features „ Wide 5V to 32V Input Voltage Range „ Output Adjustable from 0.
8V to 30V „ Maximum Duty Cycle 100% „ Minimum Drop Out 0.
6V „ Fixed 300KHz Switching Frequency „ 12A Constant Output Current Capability „ Internal Optimize Power MOSFET „ High efficiency „ Excellent line and load regulation „ Built in thermal shutdown function „ Built in current limit function „ Built in output short protection function „ Available in TO-220 package Applications „ LCD Monitor and LCD TV „ Digital Photo Frame „ Set-up Box „ ADSL Modem „ Telecom / Networking Equipment General Description The XL4012 is a 300 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 12A 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 300KHz to 60KHz.
An internal compensation block is built in to minimize external component count.
Figure1.
Package Type of XL4012 12A 300KHz 32V Buck DC to DC Converter Pin Configurations Datasheet XL4012 Figure2.
Pin Configuration of XL4012 (Top View) Table 1 Pin Description Pin Number 1 2 3 4 5 Pin Name GND FB SW NC VIN Description Ground Pin.
Care must be taken in layout.
This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL4012.
Feedback Pin (FB).
Through an external resistor divider network, FB senses the output voltage and regulates it.
The feedback threshold voltage is 0.
8V.
Power Switch Output Pin (SW).
SW is the switch node that supplies power to the output.
No connect...


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