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PI2127

Rev 1.3

Pin Description

Pin Name

Pin

Number

Description

NC

1, 3, 5, 7

Not Connected: Leave pins floating.

PG

2

Control Circuitry Return: This pin is the floating return path for the controller circuitry.

Connect this pin via a resistor to the low side return (ground).

FT

4

Fault Status Output: This open collector pin pulls low to indicate one of the several

potential fault conditions may exist. The Fault pin will pull low after a reverse or forward

fault has been detected with a defined delay time (8μs). In addition, the

Leave this pin open if unused.

GND

6

this pin to logic ground.

SN

8

Negative Sense Input: Connect SN pin to the trace between D pin (outside of the

PI2127 foot print) and the output load. The polarity of the voltage difference between SP

and SN provides an indication of current flow direction through the MOSFET.

D

9, 10, 11,

17

Drain: The Drain of the internal N-channel MOSFET and fault level shift circuit. Connect

this pin to the output load.

S

12, 13, 14

16

Source-The source of the internal N-channel MOSFET and bias for the control circuitry.

Connect this pin to the input power source bus voltage.

SP

15

Positive Sense Input: Connect SP pin to the trace between S pin (outside of the PI2127

foot print) and the input source. The polarity of the voltage difference between SP and

SN provides an indication of current flow direction through the MOSFET.

Package Pin-Out

17-pin LGA (7mm x 8mm)

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