MPQ4462 – 3.5A, 4MHz, 36V, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED

MPQ4462 Rev. 1.11

www.MonolithicPower.com

4

7/17/2013

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© 2013 MPS. All Rights Reserved.

PIN FUNCTIONS

QFN

Pin #

SOIC8E

Pin #

Name

Description

1, 2

1

SW

Switch Node. Output of the high-side switch. Requires a low-forward-drop Schottky

diode to ground. Place the diode close to the SW pins to reduce switching spikes.

3

2

EN

Enable. Pull below the specified threshold to shut the chip down. Pull it up above the

specified threshold or leave it floating to enable the chip.

4

3

COMP

Compensation. Output of the error amplifier. Includes control-loop frequency

compensation.

5

4

FB

Feedback. Input to the error amplifier. The tap of a resistor divider between the

output and GND sets the output voltage to the internal +0.8V reference.

6

5

GND

Ground.

7

6

FREQ

Switching Frequency Set. Connect a resistor from this pin to ground to set the

switching frequency.

8, 9

7

VIN

Input Supply. Supplies power to all internal control circuitry. Requires a decoupling

capacitor to ground to minimize switching spikes.

10

8

BST

Bootstrap. Positive power supply to the internal, floating, high-side MOSFET driver.

Connect a bypass capacitor between this pin and SW.

Exposed

Pad

Ground Pad. Connect to GND plane for optimal thermal performance.