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MAX16920

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

Maxim Integrated 

EVALUATION KIT AVAILABLE

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MAX16920

Automotive Power-Management IC with

Three Step-Down Converters and Linear Regulator

General Description

The MAX16920 power-management IC integrates

three high-voltage step-down DC-DC converters, one

high-voltage linear regulator, and an overvoltage

protection block. The three step-down converters deliver

up to 150mA, 600mA, and 1.5A, while the linear regulator

is capable of up to 150mA. The MAX16920 is designed

to operate with input voltages between 5.5V to 28V and

survive voltage transients to 45V, making it ideal for

automotive applications.

The MAX16920 is optimized for high efficiency and

low standby current. The MAX16920A features 400kHz

switching frequency, while the MAX16920B features 2MHz

switching frequency. The MAX16920 can be ordered

with spread-spectrum frequency modulation. The DC-DC

converters can also be synchronized to an external

frequency reference using the SYNC input minimize EMI.

The MAX16920 includes power-good outputs (PG_) for

DC-DC2, DC-DC3, LDOA, and a power-on reset (POR)

for DC-DC1. All regulators other than DC-DC1 have

an enable input (EN_). DC-DC1 always operates when

power is applied to the MAX16920.

The MAX16920 operates over the -40°C to +125°C

temperature range, and is available in a compact,

thermally enhanced 32-pin TQFN package (7mm x 7mm).

Applications

●● Automotive Radios

●● Automotive Navigation Systems

Features

●● 5.5V to 28V Wide Operating Voltage Range

●● Tolerates Input Voltage Transients Up to 45V

●● Three High-Voltage Buck Converters with High

Efficiency

●● DC-DC1: 150mA (max), Always-On, Ultra-Low

Quiescent Current (25μA)

• 3.3V Fixed or Adjustable from 1.22V to 5V

●● DC-DC2: 600mA (max), 5.0V Fixed or Adjustable

Output Voltage from 1.22V to 5V

●● DC-DC3: 1.5A (max), 3.3V Fixed or Adjustable from

1.22V to 8.0V

●● One High-Voltage 5V Linear Regulator (150mA)

●● pMOS Driver Output with Fixed Overvoltage

Shutdown

●● 400kHz (MAX16920A) or 2MHz (MAX16920B)

Switching Frequency

●● Frequency Synchronization Input

●● Open-Drain Power-Good Outputs for DC-DC2,

DC-DC3, LDOA, and Power-On Reset for DC-DC1

●● Enable Inputs for DC-DC2, DC-DC3, and LDO

●● Internal Soft-Start

●● ±2% Undervoltage Comparator

●● Overtemperature Shutdown

●● -40°C to +125°C Operating Temperature Range

●● Compact 32-Pin TQFN Package (7mm x 7mm)

Ordering Information

PART

TEMP RANGE

MAX16920AATJ/V+*

-40°C to +125°C

MAX16920AATJS/V+*

-40°C to +125°C

MAX16920BATJ/V+

-40°C to +125°C

MAX16920BATJS/V+*

-40°C to +125°C

/V denotes an automotive qualified part.

+Denotes a lead(Pb)-free/RoHS-compliant package.

*Future product—contact factory for availability.

**EP = Exposed pad.

†Contact the factory for other POR options.

SWITCHING

FREQUENCY

400kHz

400kHz

2.2MHz

2MHz

POR DELAY†

(ms)

5.1

5.1

7.5

8

PIN-PACKAGE

32 TQFN-EP**

32 TQFN-EP**

32 TQFN-EP**

32 TQFN-EP**

19-5718; Rev 2; 2/19

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