MAX4373TESA-T

Overview

The MAX4373TESA-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 +20V/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 SO package.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and a latching comparator output to prevent oscillation during overcurrent events.
• Features a wide 0V to +28V common-mode input range that remains functional even when connected to deeply discharged battery packs.
• Provides a voltage output proportional to the sense voltage, 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 'T' indicates tape-and-reel packaging if required by assembly equipment. Confirm the 'E' suffix corresponds to the SO-8 package variant. Ensure the component meets RoHS compliance standards as indicated by the manufacturer's lead-free designation. Cross-reference the full part number against the official Maxim Integrated ordering guide to confirm availability and exact pinout configuration.

Selection Notes

Select this component for applications requiring integrated high-side current monitoring without external gain resistors. The +20V/V gain is suitable for sensing lower currents or utilizing larger sense resistors compared to higher gain variants. Verify that the system supply voltage falls within the 2.7V to 28V range and that the load current does not exceed the thermal limits of the chosen sense resistor.

Part Context

This device 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 additional comparators 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+ (µMAX package) and other gain variants like MAX4373FESA-T (+50V/V) or MAX4373HESA-T (+100V/V). Ensure the replacement matches the required gain and package type for PCB compatibility.