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 placed outside of the Schottky Diode to output capacitor 1 GND 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. Power Switch Output Pin (SW). SW is the switch node that 3 SW supplies power to the output. Internal Voltage Regulator Bypass Capacitor Pin (VC). The 4 VC VC pin connect a 1uf capacitor to VIN. Supply Voltage Input Pin. XL4016 operates from a 8V to 36V 5 VIN DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Rev 1.6 www.xlsemi.com 2
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