MP2172 – 5.5V, 2A, 2.6MHz, SYNCHRONOUS STEP-DOWN SWITCHER

MP2172 Rev. 1.0

www.MonolithicPower.com

11

4/24/2019

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PIN FUNCTIONS

Package

Pin #

Name

Description

1

PG

Power good indicator. The output of PG is an open drain that connects to VIN via an

internal pull-up resistor. PG goes high if the output voltage is within ±10% of the nominal

voltage.

2

VIN

Input supply. The MP2172 operates from a 2.5V to 5.5V input rail. A capacitor (C1)

prevents large voltage spikes from appearing at the input.

3

SW

Switch output. SW is the output of the internal power switch.

4

PGND

Power ground. PGND is the reference ground of the power device and requires careful

consideration during PCB layout. For best results, connect PGND with copper pours and

vias.

5

OUT

Input sense. OUT is for the output voltage feedback.

6

AGND Analog ground. AGND is the reference ground of the internal control circuit.

7

FB

Feedback. Connect FB to the tap of an external resistor divider from the output to AGND

to set the output voltage.

8

EN

Enable. Pull EN high to enable the MP2172. Float EN or connect EN to ground to disable

the MP2172.