MP2212 – 16V, 3A, 600kHz SYNCHRONOUS STEP-DOWN CONVERTER

MP2212 Rev. 1.01

www.MonolithicPower.com

4

2/22/2012

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PIN FUNCTIONS

8-SOICE

Pin #

10-QFN

Pin #

Name

Description

5

6

VCC

Bias Supply. This supplies power to both the internal control circuit and the

gate drivers. A decoupling capacitor to ground is required close to this pin.

3

4, 7

IN

Input Supply. This supplies power to the high side switch. A decoupling

capacitor to ground is required close to this pin to reduce switching spikes.

6，7

3, 8

SW

Switch Node Connection to the Inductor. These pins connect to the internal

high and low-side power MOSFET switches. All SW pins must be

connected together externally.

2

2, 9

GND,

Exposed

Pad

Ground. Connect these pins with larger copper areas to the negative

terminals of the input and output capacitors. Connect Exposed Pad and

GND pin to the same plane.

4

5

BS

Bootstrap. A capacitor between this pin and SW provides a floating supply

for the high-side gate driver.

1

1

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.

8

10

EN/SYNC

Enable and Frequency Synchronization Input Pin. Forcing this pin below

start-up.

Applying a 500kHz to 2MHz clock signal to this pin synchronizes the internal

oscillator frequency to the external source. Don’t apply a voltage more than