MP2115 – 2A, 6V SYNCHRONOUS STEP-DOWN CONVERTER

MP2115 Rev. 1.0

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4

2/28/2011

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PIN FUNCTIONS

Pin #

Name

Description

1

VIN

Supply Input for the power stage.

2

ILIM

Input Current Limit setting pin. A resistor from this pin to ground sets the input current limit.

3

FB

Feedback Input. Connect FB to the center point of the external resistor divider. The feedback

threshold voltage is 0.6V.

4

AGND Analog Ground.

5

FREQ

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

switching frequency.

6

PGND

Exposed

Pad

The exposed pad and PGND pin must be connected to the same ground plane.

7

SW

Power Switch Output. Inductor connection to drains of the internal PFET and NFET switches.

8

VSYS

Load switch output and switching regulator input. Usually this pin connects to a large tantalum

capacitor as energy reservoir.

9

EN

On/Off Control Input.

10

PG

Power good signal. When FB is less than 80% of 0.6V, PG is low. It is an open-drain output.

Use a high value pull-up resistor externally to pull it up to system power supply.