MAX4374FEUB+

Overview

The MAX4374FEUB+ 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 0V to +28V common-mode input range independent of the supply voltage. The specific model includes a fixed gain of +50V/V and utilizes a 10-pin µMAX package.

Feature Summary

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

Applications

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

Procurement Notes

Verify that the ordering suffix 'FEUB+' corresponds to the correct gain (+50V/V), package (10-pin µMAX), and temperature range (-40°C to +85°C). Confirm RoHS compliance status as indicated by the '+' designation. Ensure the application circuit accommodates the latching comparator behavior by including a reset mechanism if required.

Selection Notes

Select this component when high-side current monitoring is required without interfering with the ground path. The +50V/V gain is suitable for applications requiring moderate sensitivity. The dual-comparator architecture supports window detection, making it ideal for systems needing both overcurrent protection and minimum load monitoring capabilities.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of current-sense supervisors. The MAX4374 variant specifically includes two comparators, unlike the MAX4373 which has one. The 'F' suffix denotes the +50V/V gain option, while 'H' indicates +100V/V and 'T' indicates +20V/V. The 'UB' suffix specifies the 10-pin µMAX package type.

Replacement Considerations

Public confirmed substitute part numbers: MAX4374TEUB+, MAX4374HEUB+, MAX4374FESD+