MP2452―1A, 36V, 1MHz, STEP-DOWN CONVERTER

MP2452 Rev. 1.0

www.MonolithicPower.com

4

9/27/2010

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PIN FUNCTIONS

Pin #

Name

Description

2

BST

Bootstrap. This is the positive power supply for the internal floating high side MOSFET

driver. Connect a bypass capacitor between this pin and SW pin.

6

GND,

EXPOSED

PAD

Ground. Connected GND as close as possible to the output capacitor avoiding the

high current switch paths. Connect exposed pad to GND plane

7

FB

Feedback. This is the input to the error amplifier. An external resistive divider

connected between the output and GND is compared to the internal +0.794V reference

to set the regulation voltage.

5

EN

Enable input. Pulling this pin below the specified threshold shuts the chip down. Pulling

it above the specified threshold enables the chip. Floating this pin shuts the chip down.

4

VIN

Input Supply. This supplies power to all the internal control circuitry, both BS regulators

and the high side switch. Connect a decoupling capacitor to ground close to this pin as

possible to reduce switching spikes.

3

SW

diode to ground close to this pin as possible to reduce switching spikes.

1, 8

N/C

No connect.