MP2159 – 1A, 6V, 1.5MHz SYNCHRONOUS STEP-DOWN SWITCHER

MP2159 Rev. 1.03

www.MonolithicPower.com

7

9/6/2013

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PIN FUNCTIONS

TSOT23-8

Pin #

Name

Description

1

PG

Power Good Indicator. The output of this pin is an open drain with internal pull up

resistor to IN. PGOOD is pulled up to IN when the FB voltage is within 10% of the

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

2

VIN

Supply Voltage. The MP2159 operates from a +2.5V to +6V unregulated input. C1 is

needed to prevent large voltage spikes from appearing at the input.

3

SW

Switch Output

4

PGND

Power ground

5

OUT

Input sense pin for output voltage

6

AGND

Analogy ground for internal control circuit

7

FB

Feedback pin. An external resistor divider from the output to GND, tapped to the FB pin,

sets the output voltage.

8

EN

On/Off Control