MP28200 – 5.5V, 200

MP28200 Rev.1.0

www.MonolithicPower.com

10

10/10/2016

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PIN FUNCTIONS

Pin#

Name

Description

1

OUT

Output voltage sensing of the step-down switcher.

Connect the load to OUT. An output

capacitor is needed to decrease the output voltage ripple.

2

CTRL1

Step-down switcher control signal.

Adjust the step-down switcher output voltage value

dynamically. Do not float the CTRL pins during application. When used, ensure that the

CTRL voltage is not lower than VIN. If unused, tie CTRL to GND. Refer to Table 1 on page

12 to set the buck output value.

3

CTRL2

4

CTRL3

5, 6

TP

Internal test pin.

TP must be connected to GND.

7

PG

Power good for the step-down switcher.

PG is an open-drain output.

8

GND

Ground.

9

SW

Switch output for the step-down switcher.

SW is the drain of the internal, high-side, P-

channel MOSFET. Connect the inductor to SW to complete the converter.

10

VIN

Input supply voltage to the step-down switcher.

Place a small decoupling capacitor as

close to VIN and GND as possible.

11, 12

NC

Internal test pin.

NC must be left floating.