PI2126

Rev 1.1

Pin Description

Pin

Name

Pin Number

Description

D

1, 15, 16 17,

22, 23, 24, 25

Drain: The Drain of the internal N-channel MOSFET. Connect this pin to the output load.

S

2, 3, 4, 5, 18,

19, 20, 21

Source: The source of the internal N-channel MOSFET. Connect this pin to the input power

source bus voltage.

SP

6

Positive Sense Input & Clamp: Connect SP pin to the trace between S pin and the input source

(outside of the PI2126 foot print). The polarity of the voltage difference between SP and SN

provides an indication of current direction through the MOSFET.

VR

7

Controller Input Supply With Limiting Resistor: This pin is connected internally to VC through

a 420Ω resistor added for Bus voltages greater than 10V and less than 14V.

VC

8

Controller Input Supply: This pin is the supply pin for the control circuitry and gate driver.

Voltage on this pin is regulated to 11.7V with respect to PG pin by an internal shunt regulator.

NC

9, 12

Not Connected: Leave these pins unconnected.

PG

10, 11

Control Circuitry Return: These pins are ground return for the gate driver and control circuitry.

In 12V applications connect these pins to ground.

13

Fault Status Output: This open collector pin pulls low after a delay when a reverse fault or a

Leave this pin unconnected if unused.

SN

14

Negative Sense Input: Connect SN pin to the trace between D pin and the output load (outside

of the PI2126 foot print). The polarity of the voltage difference between SP and SN provides an

indication of current direction through the MOSFET.

Package Pin-Out

25-pin LGA (5mm x 7mm)

Top view

8

11

12

10

9

13

14

15

16

17

1

22

23

24

25

21

20

19

18

2

3

4

5

6

7

S

S

S

S

D

D

D

D

VR

SP

FT

PG

PG

NC

SN

NC

PI2126

D

D

D

D

S

S

S

S

VC

EOL