MP2187 – DUAL 3A, 5.5V, 1.2MHz, SYNCHRONOUS STEP-DOWN SWITCHER

MP2187 Rev. 1.0

www.MonolithicPower.com

10

12/12/2014

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PIN FUNCTION

QFN16

Pin #

Name

Description

1

PG1

Power Good Indicator of channel 1. The output of this pin is an open drain with an internal

pull up resistor to IN. PG is pulled up to VIN when the FB voltage is within 10% of the

regulation level. If the FB voltage is out of that regulation range, it is LOW.

2

EN1

On/Off Control of channel 1.

3

FB1

Internal FB point of channel 1. For fixed output application, FB pin must float. For

adjustable output application, it is FB pin and used to set output voltage.

4

OUT2

Output Voltage Sense pin of channel 2. For output voltage sense.

5, 6,

13, 14

GND

Power Ground.

7

SW2

Switch Output of channel 2.

8

VIN2

Supply Voltage of channel 2. The MP2187 operates from a +2.5V-to-+5.5V input.

9

PFL

Power Fails Logic. It is an open drain signal which will be pulled low When PFS voltage is

lower than desired threshold.

10

EN2

On/Off Control of channel 2.

11

PFS

Power Fails sense. Using an external resistor network connect PFS from VIN to indicate

the input voltage. When indicated voltage is below desired threshold, PFL is pulled down.

12

OUT1

Output Voltage Sense pin of channel 1. For output voltage sense.

15

SW1

Switch Output of channel 1.

16

VIN1

Supply Voltage of channel 1. The MP2187 operates from a +2.5V-to-+5.5V input.