MAX4373TEUA

Overview

The MAX4373TEUA+ 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 +20V/V gain version in an 8-pin µMAX package, specified for -40°C to +85°C. It provides a voltage output eliminating external gain resistors, supports a 0V to +28V common-mode input range independent of supply voltage, and includes a latching comparator output to prevent oscillation during overcurrent events.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and latching comparator into a single compact solution.
• Features a latching comparator output that eliminates oscillation, providing a stable turn-off flag for power supply shutdown.
• Operates with a 0V to +28V input common-mode range independent of the supply voltage, ensuring functionality during deep battery discharge.
• Provides a voltage output proportional to the sense voltage, removing the need for external gain-setting resistors.

Applications

• Notebook Computers
• Portable/Battery-Powered Systems
• Smart Battery Packs/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 '+' suffix denotes lead-free/RoHS compliance status as per manufacturer standards. Ensure the 8-pin µMAX package footprint matches the PCB design. Check for any obsolescence notices or lifecycle changes directly from Analog Devices documentation before finalizing procurement plans.

Selection Notes

Select this part when high-side monitoring is required without interfering with the ground path. The +20V/V gain is suitable for applications requiring lower output voltage swings compared to higher gain variants. Verify that the 50µA supply current meets strict battery life requirements. Ensure the operating temperature range of -40°C to +85°C covers the environmental conditions of the target system.

Part Context

The MAX4373 is part of a family including MAX4374 and MAX4375, which add a second comparator for window detection functions. The TEUA variant specifically denotes the +20V/V gain option housed in an 8-pin µMAX package. This series is designed for portable electronics where space and power consumption are critical constraints.

Replacement Considerations

Direct substitutes within the same family include MAX4373TESA+ (SO package) or other gain variants like MAX4373FEUA+ (+50V/V) and MAX4373HEUA+ (+100V/V). Cross-family replacements require verifying pin compatibility and electrical parameter alignment with official datasheets.