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MAX16920

Automotive Power-Management IC with Three Step-Down Converters and Linear Regulator

Maxim Integrated 

MAX16920

Automotive Power-Management IC with

Three Step-Down Converters and Linear Regulator

Pin Configuration

TOP VIEW

24 23 22 21 20 19 18 17

EN2 25

16 BST2

0T 26

15 VINB

UVO 27

14 LX2

SYNC 28

PG3 29

MAX16920

13 PGNDB

12 LX1

PG2 30

11 VINA

PGA 31

POR 32

+ EP*

10 BST1

9 ODRV

1 2345678

*CONNECT TO GND.

TQFN

Pin Description

PIN

NAME

1

ENA

2

VL

3

GND

4

OUT1

5

FB1

6

OUT2

7

FB2

8

OUTA

9

ODRV

10

BST1

11

VINA

12

LX1

FUNCTION

LDO Enable Input. Drive ENA high to enable the LDO (OUTA). Drive low to disable the LDO.

Internal Regulator Output. Bypass VL to GND with a 4.7µF capacitor.

Ground

DC-DC1 Converter Output. OUT1 supplies internal circuitry in standby mode reducing overall

current consumption. Connect a 0.1µF capacitor from OUT1 to GND as close as possible to the IC.

If the DC-DC1 output is pulled below its power-on-reset threshold (POR), DC-DC2 and DC-DC3

are automatically disabled.

DC-DC1 Converter Feedback Input. Connect FB1 to GND for a fixed 3.3V output. Connect to a

resistive divider to adjust the output voltage between 1.22V and 5.5V.

DC-DC2 Converter Output

DC-DC2 Converter Feedback Input. Connect FB2 to GND for a fixed 5V output. Connect to a

resistive divider to adjust the output voltage between 1.22V and 5V.

5V Linear Regulator Output. Connect an external capacitor of at least 4.7µF from OUTA to GND.

External pMOS Output Drive Signal. ODRV turns off the pMOS during overvoltage events. If only

DC-DC1 is running, the overvoltage circuit is disabled and the external pMOS is turned off.

Bootstrap Capacitor Connection for DC-DC1. Connect a 0.47µF capacitor from BST1 to LX1.

Battery Supply-Voltage Input. VINA supplies power to the VL regulator, the LDO, and DC-DC1.

DC-DC1 Converter Switching Node. Connect an LC filter to LX1. Use a capacitor with a maximum

ESR of 0.3Ω. Unless there is an undervoltage lockout, DC-DC1 is always on when power is applied.

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