MP2148 Rev. 1.11

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12

5/25/2015

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PIN FUNCTIONS

Pin

#

Name Description

1

FB/PG

MP2148GQD: Feedback Pin. An external resistor divider from the output to GND, tapped to the

FB pin, sets the output voltage.

MP2148GQD-XX: Power Good Indicator. The output of this pin is an open drain output. Keep PG

pulls up voltage is lower than Vin.

2

GND

Power Ground.

3

VIN

Supply Voltage. The MP2148 operates from a +2.3V to +5.5V unregulated input. Decouple

capacitor is needed to prevent large voltage spikes from appearing at the input.

4

SW

Output Switching Node. SW is the drain of the internal high-side P-Channel MOSFET. Connect

the inductor to SW to complete the converter.

5

EN

On/Off Control.

6

OUT

Output Voltage Power Rail and Input Sense Pin for Output Voltage. Connect load to this pin.

Output capacitor is needed to decrease the output voltage ripple.