MP2467 – 2.5A, 36V, 500KHz STEP-DOWN CONVERTER

MP2467 Rev. 1.1

www.MonolithicPower.com

4

1/25/2010

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PIN FUNCTIONS

Pin #

Name Description

1

SW

is required. The rectifier must be close to the SW pins to reduce switching spikes.

2

EN

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

above the specified threshold or leaving it floating enables the chip.

3

COMP

Compensation. This node is the output of the error amplifier. Control loop frequency

compensation is applied to this pin.

4

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 +0.8V reference to set the regulation

voltage.

5

GND

Ground. It should be connected as close as possible to the output capacitor avoiding the high

current switch paths.

6

RSET Internal Bias Setting. Connect a 200kΩ resistor to this pin.

7

VIN

Input Supply. This supplies power to all the internal control circuitry, including bootstrap

regulator and the high-side switch. A decoupling capacitor to ground must be placed close to

this pin to minimize switching spikes.

8

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.