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AP65201WU-7 Datasheet(PDF) 2 Page - Diodes Incorporated |
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AP65201WU-7 Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 14 page AP65201 Document number: DS36109 Rev. 3 - 3 2 of 14 www.diodes.com December 2016 © Diodes Incorporated AP65201 NOT RECOMMENDED FOR NEW DESIGN Pin Descriptions Pin Name Pin Number Function GND 1 Ground SW 2 Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS to power the high-side switch. IN 3 Power Input. IN supplies the power to the IC, as well as the step-down converter switches. Drive IN with a 4.5V to 16V power source. Bypass IN to GND with a suitably large capacitor to eliminate noise on the input to the IC. See Input Capacitor. FB 4 Feedback Input. FB senses the output voltage and regulates it. Drive FB with a resistive voltage divider connected to it from the output voltage. The feedback threshold is 0.8V. See Setting the Output Voltage. EN 5 Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator; low to turn it off. Attach to IN with a 100kΩ pull up resistor for automatic startup. BST 6 High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET a 0.01µF or greater capacitor from SW to BS to power the high side switch. Functional Block Diagram E + - + - + - + 1.1V 0.3 V INTERNAL REFERENCE Logic 0.8V + - Internal SS OSCILLATOR CURRENT SENSE AMPLIFIER OVP RAMP CLK CURRENT COMPARATOR FB EN 0.8 V GND SW BST IN 500KHz 0.3V 1.1V Vcc REGULATOR 5 4 6 2 1 3 |
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