MP2127 – 2.7-6V, 2A, 1.2MHZ SYNCHRONOUS STEP-DOWN CONVERTER

MP2127 Rev. 0.91

www.MonolithicPower.com

4

4/27/2010

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PIN FUNCTIONS

Pin #

Name

Description

1

FB

Feedback input. An external resistor divider from the output to GND, tapped to the FB pin

sets the output voltage.

2

GND

Ground pin. This pin is the reference ground of the regulated output voltage. For this

reason care must be taken in PCB layout. Suggested to be connected to GND with copper

and vias. Connect exposed pad to ground plane for proper thermal performance.

3

SW

Switch node to the inductor

4

PVIN

Input supply pin for power FET

5

VIN

Input Supply pin for controller

6

PGOOD

Power-good indicator output. “Low” output indicates output is outside the window of

regulation level. PGOOD is pulled down in shutdown. PGOOD output has 160us deglitch

timer to avoid false trigger during transient response.