SPV1020

Pin connection

Doc ID 17588 Rev 3

5/19

Table 2.

Pin description

Pin

Name

Type

Description

PowerSSO-36

34

VIN

Supply

DC input power supply unit.

7,8,17,18,19,20,29,30

VOUT

Supply

Booster output voltage

12,13,24,25

PGND

Ground

Power ground

1SGND

Ground

Signal ground reference. The exposed pad is connected to

PGND.

22,23,26,27,15,14,11,1

0

LX1…4

I

Booster inductor connection.

9,16,21,28

CB1…4

I/O

External bootstrap capacitors must be connected between

these pins and LXi

5

VREG

I/O

Power supply for internal low voltage circuitry; an external

capacitor must be connected to this pin referenced to

SGND

35

VIN_SNS

I

Sense pin of input voltage. To be biased with a resistor

divider between VIN and SGND

3VOUT_SNS

I

Sense pin of output voltage. To be biased with a resistor

divider between VOUT and SGND

31

XCS

I

Activates the SPI

36

VIN_SNS_M

I

Dedicated ground for VIN_SNS

2

PZ_OUT

I/O

Compensates the output voltage feedback loop. A series

resistor and capacitor are connected between PZ_OUT and

SGND.

6

SPI_DATA_OUT

O

Data OUT for SPI interface

33

SPI_CLK

I

Clock for SPI interface.

32

SPI_DATA_IN

I

Data IN for SPI interface.

4OSC_IN

I

Pin for adjusting the switching frequency; to set the default

value of 100 kHz, connect OSC_IN to VREG. Otherwise

connect OSC_IN through a resistor to SGND.