MAX4373FEUA-T

Overview

The MAX4373FEUA-T 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 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 component is specified for operation within an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated high-side current-sense amplifier with internal bandgap reference
• Latching open-drain comparator output prevents oscillation during overcurrent events
• Voltage output eliminates need for external gain-setting resistors
• Common-mode input range functional down to 0V regardless of supply voltage

Applications

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

Procurement Notes

Verify that the specific suffix 'T' indicates tape-and-reel packaging if reel handling is required for assembly. Confirm the package type matches the design footprint, as this part number corresponds to the 8-pin µMAX package. Ensure the '+50' gain variant aligns with the system's full-scale voltage requirements before finalizing procurement.

Selection Notes

Select this part when a fixed +50V/V gain is appropriate for the target load current and sense resistor value. Consider the MAX4373 series for applications requiring a latching fault flag without oscillation. Verify that the 0V to +28V common-mode range covers the minimum battery discharge voltage in the application.

Part Context

This component belongs to the MAX4373/MAX4374/MAX4375 family of high-side current-sense supervisors. The MAX4373 variant includes a single latching comparator, whereas the MAX4374 and MAX4375 add a second comparator for window detection functions. All variants share the same core amplifier architecture and power specifications.

Replacement Considerations

Other gain versions within the MAX4373 family include MAX4373TEUA+ (+20V/V) and MAX4373HEUA+ (+100V/V). For SOIC packages, MAX4373FESA+ is available. Window detection capabilities are provided by the MAX4374 and MAX4375 variants.