MP2143 Rev. 1.07

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9

7/4/2016

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PIN FUNCTIONS

TSOT23

Pin #

Name

Description

1

PG

Power-Good Indicator. The pin output is an open drain that connects to VIN by an internal

pull-up resistor. PG is pulled up to VIN when the FB voltage is within ±10% of the

regulation level. If FB voltage is out of that regulation range, it is LOW.

2

VIN

Supply Voltage. The MP2143 operates from a 2.5V-to-5.5V unregulated input. C1

prevents large voltage spikes from appearing at the input.

3

SW

Switch Output

4

PGND Power Ground

5

OUT

Input Sense. For output voltage feedback

6

AGND Analog ground. Reference for the internal control circuit.

7

FB

Feedback pin. Connect an external resistor divider from the output to AGND to set the

output voltage.

8

EN

On/Off Control