Datasheet
12A 180KHz 40V Buck DC to DC Converter XL4016 Features General Description Recommended operating voltage range The XL4016 is a 180 KHz fixed frequency 8V~36V PWM buck (step-down) DC/DC converter, Output Adjustable from 1.25V to 32V capable of driving a 12A load with high Maximum Duty Cycle 100% efficiency, low ripple and excellent line and Minimum Drop Out 0.3V load Fixed 180KHz Switching Frequency number 12A Constant Output Current Capability regulator is simple to use and include Internal Optimize Power MOSFET internal frequency compensation and a High efficiency up to 96% fixed-frequency oscillator. Excellent line and load regulation Built in thermal shutdown function The PWM control circuit is able to adjust the Built in current limit function duty ratio linearly from 0 to 100%. An over Built in output short protection function current protection function Available in TO220-5L package When short protection function happens, the regulation.
of Requiring external a minimum components, the is built inside. operation frequency will be reduced from
180KHz to 48KHz. An internal compensation
block is built in to minimize external component count. Applications LCD Monitor and LCD TV Portable instrument power supply Telecom / Networking Equipment Figure1. Package Type of XL4016 Rev 1.6 www.xlsemi.com
1 Datasheet
12A 180KHz 40V Buck DC to DC Converter XL4016 Pin Configurations TO220-5L
5 VIN 4 VC 3 SW 2 FB 1 GND Metal Tab SW Figure2. Pin Configuration of XL4016 (Top View) Table 1 Pin Description Pin Number Pin Name Description
Ground Pin. Care must be taken in layout. This pin should be 1 GND placed outside of the Schottky Diode to output capacitor
ground path to prevent switching current spikes from
inducing voltage noise into XL4016.
Feedback Pin (FB). Through an external resistor divider 2 FB network, FB senses the output voltage and regulates it. The
feedback threshold voltage is 1.25V. 3 SW 4 VC 5 VIN Power Switch Output Pin (SW). SW is the switch node that
supplies power to the output.
Internal Voltage Regulator Bypass Capacitor Pin (VC). The
VC pin connect a 1uf capacitor to VIN.
Supply Voltage Input Pin. XL4016 operates from a 8V to 36V
DC voltage. Bypass Vin to GND with a suitably large
capacitor to eliminate noise on the input. Rev 1.6 www.xlsemi.com
2 Datasheet
12A 180KHz 40V Buck DC to DC Converter XL4016 Function Block
VC 220mV VIN 200mV
20mΩ 3.3V 3.3V Regulator …
