General Description

The MAX20004/MAX20006/MAX20008 are small, synchro-

nous, automotive buck converter devices with integrated

high-side and low-side MOSFETs. The device family can

deliver up to 8A with input voltages from 3.5V to 36V, while

using only 25μA quiescent current at no load. Voltage qual-

ity can be monitored by observing the RESET signal. The

devices can operate in dropout by running at 98% duty

cycle, making them ideal for automotive applications.

The devices offer fixed output voltages of 5V and 3.3V,

along with the ability to program the output voltage between

1V and 10V. Frequency is resistor programmable from

220kHz to 2.2MHz. The devices offer a forced fixed-fre-

quency PWM mode (FPWM) and skip mode with ultra-low

quiescent current. The devices can be factory programmed

to enable spread-spectrum switching to reduce EMI.

The MAX20004/MAX20006/MAX20008 are available in a

small, 3.5mm x 3.75mm, 17-pin FC2QFN package and use

very few external components.

Applications

● Point-of-Load (PoL) Applications in Automotive

● Distributed DC Power Systems

● Navigation and Radio Head Units

Benefits and Features

● Multiple Functions for Small Size

• 25µA Quiescent Current in Skip Mode

• Synchronous DC-DC Converter with

Integrated FETs

• 220kHz to 2.2MHz Adjustable Frequency

• Fixed 5ms Internal Soft-Start

• Programmable 1V to 10V Output, or 3.3V and

5.0V Fixed-Output Options Available

• 98% Duty-Cycle Operation with Low Dropout

• RESET Output

● High Precision

• ±2% Output-Voltage Accuracy

• Good Load-Transient Performance

● Robust for the Automotive Environment

• Current-Mode, Forced-PWM and Skip Operation

• Overtemperature and Short-Circuit Protection

• 3.5mm x 3.75mm 17-Pin FC2QFN

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

• 40V Load-Dump Tolerant

• AEC-Q100 Qualified

Ordering Information appears at end of data sheet.

19-100239; Rev 8; 11/19

MAX20004/MAX20006/

MAX20008

36V, 220kHz to 2.2MHz, 4A/6A/8A

Fully Integrated Automotive

Step-Down Converters

Typical Application Circuit

4.7µF

L

1µH

2.2µF

SUP

EN

SYNC

RESET

LX

PGND

BST

BIAS

GND

OUT

SUPSW

FB

0.1µF

0.1µF

20kΩ

FOSC

COMP

BIAS

12kΩ

22kΩ

1nF

4.7pF

Click

here for production status of specific part numbers.