MAX4375FEUB+

Overview

The MAX4375FEUB+ is a low-cost, micropower high-side current-sense supervisor featuring an integrated amplifier, comparator, and bandgap reference. It operates from a single +2.7V to +28V supply with a typical supply current of 50µA. The device provides a voltage output proportional to the sense resistor voltage drop, eliminating external gain-setting resistors. It features a +50V/V fixed gain, a 0V to +28V common-mode input range independent of supply voltage, and a latching open-drain comparator output. The part is specified for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated high-side current-sense amplifier with internal bandgap reference
• Latching comparator output prevents oscillation during overcurrent events
• Second comparator enables window-detection functionality
• Voltage output eliminates need for external gain-setting resistors

Applications

• Notebook computers
• Portable/battery-powered systems
• Smart battery packs and chargers
• Cell phones
• Power-management systems

Procurement Notes

Verify the specific suffix 'FEUB+' against official manufacturer documentation to confirm package type (10-pin µMAX), gain (+50V/V), and lead-free status. Ensure compatibility with system power-up sequences, as the RESET pin requires external handling to prevent false latching during initial power application. Confirm that the operating supply voltage remains within the specified 2.7V to 28V range for reliable performance.

Selection Notes

Select this component when high-side monitoring is required without disturbing the ground path. The +50V/V gain suits applications where moderate sensitivity is needed. The dual-comparator architecture allows for precise window detection if both upper and lower current limits must be monitored simultaneously. Verify that the external sense resistor can handle the expected power dissipation to maintain accuracy.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of current-sense supervisors. The MAX4375 variant specifically includes two comparators for window detection, unlike the MAX4373 which has one. The 'F' designation indicates a fixed gain of +50V/V, while 'U' denotes the 10-pin µMAX package. These devices are designed for compact, cost-sensitive portable electronics requiring efficient battery management.

Replacement Considerations

Public confirmed substitute part numbers: MAX4375TEUB+, MAX4375HEUB+, MAX4375FESD+. Ensure replacement parts match the required gain (+50V/V) and package footprint (10-pin µMAX). Verify that any alternative maintains the same latching comparator behavior and common-mode input range specifications.