MAX4373FEUA+T

Overview

The MAX4373FEUA+T is a low-cost, micropower high-side current-sense supervisor integrating a current-sense amplifier, bandgap reference, and latching comparator. It operates from a single +2.7V to +28V supply with a typical supply current of 50µA. The device features a gain of +50V/V, an input common-mode range of 0V to +28V independent of the supply voltage, and an operating temperature range of -40°C to +85°C. It is housed in an 8-pin µMAX package.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and a latching comparator output for simplified overcurrent protection without oscillation.
• Features a wide 0V to +28V common-mode input range that remains functional even during deep battery discharge or when sensing voltages exceed the supply rail.
• Provides a fixed voltage output proportional to the sense resistor drop, eliminating 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 the specific suffix 'F' corresponds to the required +50V/V gain configuration before procurement. Confirm the 'U' indicates the 8-pin µMAX package type. Ensure the '+T' designation matches the tape-and-reel packaging requirement for the manufacturing line. Cross-reference the manufacturer's latest datasheet for any potential pinout or electrical characteristic updates.

Selection Notes

Select this component when a fixed +50V/V gain is optimal for the target full-scale sense voltage. Consider the 8-pin µMAX package constraints regarding thermal dissipation and board space. Evaluate the 50µA supply current against strict power budget requirements. Verify that the 0V to +28V common-mode range covers the system's minimum and maximum bus voltages.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower current-sense supervisors. The MAX4373 variant specifically includes a single latching comparator, whereas the MAX4374 and MAX4375 include an additional comparator for window detection functions. All variants share the same core amplifier architecture and power specifications.

Replacement Considerations

Direct substitutes within the same family include MAX4373TEUA+T (+20V/V gain) and MAX4373HEUA+T (+100V/V gain). These parts maintain identical pinouts and functionality but differ in amplifier gain settings. Verify that the alternative gain aligns with the application's sensitivity requirements.