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MAX18002

500mV to 5.5V Input, Ultrasonic

Boost Converter with Short-Circuit

Protection and True Shutdown

19-101623; Rev 0; 1/23

© 2023 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.

General Description

The MAX18002 is an ultrasonic, high-performance boost

converter with an input voltage range of 0.5V to 5.5V and

a switching current limit of 3.6A. The IC operates in

ultrasonic mode (USM) (FSW at 29kHz typ) at low loads

and transitions into skip mode and continuous

conduction mode (CCM) of operation at higher load

currents. The MAX18002 can operate in pass-through

mode when the input voltage is higher than the output

voltage.

The output voltage can be varied between 2.5V and 5.5V

(USM disabled for VOUT > 5V) using a single RSEL

resistor.

The MAX18002 features a True Shutdown™ mode

which disconnects VIN and VOUT when the EN pin is

pulled low. It also features a short-circuit protection

circuitry that limits the current to 700mA when VOUT <

0.5V and automatically restarts the part when the fault is

removed. The thermal-shutdown protection disables the

part when the junction temperature crosses +165˚C

(typ).

The MAX18002 is available in 1.07mm x 1.57mm, 6-

bump, wafer-level package (WLP).

True Shutdown is a trademark of Maxim Integrated Products, Inc.

Benefits and Features

• 0.5V to 5.5V Input Voltage

• 1.8V Minimum Start-Up Voltage

• 2.5V to 5.5V (in 100mV Steps) Output Voltage

• 3.6A Cycle-by-Cycle Inductor Current Limit

• Automatic Pass-Through Mode when VIN > VOUT

• Ultrasonic Mode (FSW at 29kHz typ) to Alleviate

Acoustic Audible Interference for Light-Load

Operation

• True-Shutdown Mode

- 7nA Shutdown Current

- Output Disconnects from Input Without

Forward or Reverse Current

• Output Short-Circuit Protection

• Thermal-Shutdown Protection

• 95% Peak Efficiency (3.6VIN, 5VOUT)

• 1.07mm x 1.57mm, 0.5mm Pitch, 6-Bump WLP

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

Key Applications

• Wearable Applications

• IoT Applications

• Battery-Powered Applications

• Portable Devices

• Metering Applications

Ordering Information appears at end of data sheet.

Simplified Application Diagram

RSEL

OUT

RSEL

IN

LX

EN

GND

0.5V TO 5.5V

DC SOURCE

VOUT

2.5V TO 5.2V

MAX18002

LOW (OFF)

HIGH (ON)

L

CIN

10V, X5R,

0603, 22µF

COUT

10V, X5R,

0603, 2x22µF

6.35mm

RSEL

0402

CIN

0603