PIN

NAME

FUNCTION

14

OUTS3

Buck 3 Voltage Sense Input

15

PV3

Buck 3 Voltage Input. Connect a 2.2µF or larger ceramic capacitor from PV3 to PGND3 as close

as possible to the device.

16

LX3

Buck3SwitchingNode.LX3ishighimpedancewhenthedeviceisoff.

17

PGND3

Power Ground for Buck 3

18

PGND4

Power Ground for Buck 4

19

LX4

Buck4SwitchingNode.LX4ishighimpedancewhenthedeviceisoff.

20

PV4

Buck 4 Voltage Input. Connect a 2.2µF or larger ceramic capacitor from PV4 to PGND4 as close

as possible to the device.

21

EN4

Active-High Digital Enable Input for Buck 4. Driving EN4 high enables Buck 4.

22

OUTS4

Buck 4 Voltage Sense Input

23

PG4

Open-Drain, Active-High, Power-Good Output for Buck 4. To obtain a logic signal, pull up PG4

24

GND

Analog Ground

25

SYNC

SYNC Input. Supply an external clock to control the switching frequency. Connect SYNC to

PGND_ to use the default switching frequency.

26

VA

possible to the device. Connect to the same supply as PV_ inputs.

27

PG1

Open-Drain, Active-High, Power-Good Output for Buck 1. To obtain a logic signal, pull up PG1

28

OUTS1

Buck 1 Voltage Sense Input

—

EP

Exposed Pad. Connect the exposed pad to ground. Connecting the exposed pad to ground does

not remove the requirement for proper ground connections to PGND1–PGND4 and GND. The

exposed pad is attached with epoxy to the substrate of the die, making it an excellent path to

remove heat from the IC.

MAX20029/MAX20029B/

MAX20029C/MAX20029D

Automotive Quad/Triple Low-Voltage

Step-Down DC-DC Converters

www.maximintegrated.com

Maxim Integrated │ 9

Pin Description (continued)