MPQ2128 – 3MHz, 1A, SYNCHRONOUS, STEP-DOWN CONVERTER

MPQ2128 Rev. 1.1

www.MonolithicPower.com

5

4/1/2013

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PIN FUNCTIONS

QFN

Pin #

Name

Description

8

EN

Enable. Drive EN above 1.6V to turn on the part. Drive EN below 0.4V to turn it off.

2,4

GND

Ground.

5,6

SW

Power Switch Output. Connect an inductor to the drains of the internal PFET and NFET

switches.

3

IN

Supply. Bypass to GND with a

≥4.7µF ceramic capacitor.

1

FB

Feedback. Connect to the tap of the external resistor divider. The regulated feedback voltage

is 0.6V.

Exposed

Pad

BLOCK DIAGRAM

Figure 1: Functional Block Diagram