MAX4374HEUB+

Overview

The MAX4374HEUB+ is a low-cost, micropower high-side current-sense supervisor integrating a current-sense amplifier, bandgap reference, and comparator with latching output. It operates from a single +2.7V to +28V supply with a 50µA supply current. The device features a 0V to +28V common-mode input range independent of the supply voltage. It offers a fixed gain of +100V/V, a maximum input offset voltage of 1mV, and full-scale accuracy of 2%. The package is a 10-pin µMAX.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and a latching comparator for simplified overcurrent protection.
• Features a second comparator to enable window-detection functions for monitoring specific current ranges.
• Provides a voltage output that eliminates the need for external gain-setting resistors.
• Operates effectively in deep discharge conditions due to a common-mode range functional down to 0V.

Applications

• Notebook Computers
• Portable/Battery-Powered Systems
• Smart Battery Packs/Chargers
• Cell Phones
• Power-Management Systems

Procurement Notes

Verify the component matches the exact part number MAX4374HEUB+. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the package type is 10-pin µMAX and the temperature range is -40°C to +85°C. Check for RoHS compliance markings on the physical device or documentation.

Selection Notes

Select this component when a high-side current monitor with integrated latching protection and window detection is required. The +100V/V gain suits applications needing high sensitivity with small sense resistors. The 10-pin µMAX package is suitable for space-constrained portable designs. Verify that the system supply voltage falls within the 2.7V to 28V operating range.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower high-side current-sense supervisors. The MAX4374 variant specifically includes two comparators: one with a latching output for overcurrent shutdown and a second for window detection. It shares core amplifier specifications with the MAX4373 and MAX4375 but differs in comparator configuration.

Replacement Considerations

Public confirmed substitutes include MAX4374FEUB+, MAX4374TEUB+, MAX4375HEUB+, and MAX4373HEUB+.

FAQ

What is the function of the RESET pin?

The RESET pin controls the latch function of the first comparator. Holding it low resets the latch, allowing the output to return to its normal state after an overcurrent event.

How does the MAX4374 support window detection?

It contains a second comparator (CIN2/COUT2) that can be configured alongside the primary comparator to detect if the current falls within or outside a specific defined window.

Is the common-mode range dependent on the supply voltage?

No, the 0V to +28V common-mode input range is independent of the supply voltage, ensuring functionality even during battery deep discharge.