MP2249 – 6V, 3A, 1MHZ, SYNCHRONOUS STEP-DOWN CONVERTER

MP2249 Rev.1.0

www.MonolithicPower.com

4

11/2/2010

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PIN FUNCTIONS

Pin #

TQFN10

SOIC8E

Name

Description

6, 7, 8

5, 6

SW

Power Switch Output. Inductor connection to drains of the internal PFET

and NFET switches.

9

7

PG

Power-good indicator. PG is pulled low when output is outside the window

of regulation or the device enters shutdown.

10

8

EN

Regulator Enable Control Input. Drive EN above 1.8V to turn on the

MP2249. Drive EN below 0.4V to turn it off. EN is pulled to GND with a

450kΩ internal resistor.

1

1

FB

Feedback Input. Connect FB to the center point of the external resistor

divider. The feedback threshold voltage is 0.6V.

2, 3

Exposed

Pad

2, 3

Exposed

Pad

GND

Ground. Connect Exposed Pad to ground plane for optimal thermal

performance.

4, 5

4

PVIN

Power Stage Supply Input. Bypass to GND with a 2.2µF or bigger ceramic

capacitor.