MAX4373TEUA+T

Overview

The MAX4373TEUA+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 0V to +28V common-mode input range independent of supply voltage. The device features a fixed gain of +20V/V, 50µA supply current, and an operating temperature range of -40°C to +85°C. It utilizes an 8-pin µMAX package.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and a latching comparator output to eliminate oscillation during overcurrent events.
• Features a wide 0V to +28V common-mode input range that remains functional even when the supply voltage drops below the common-mode level, supporting deep battery discharge monitoring.
• Provides a voltage output proportional to the sense resistor voltage drop, removing the need for external gain-setting resistors.

Applications

• Notebook computers
• Portable/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 'EUA' designation corresponds to the 8-pin µMAX package. Ensure the '+T' suffix aligns with lead-free/RoHS compliance requirements for the target manufacturing process. Cross-reference the manufacturer's latest ordering guide for any potential obsolescence or alternate lot codes.

Selection Notes

Select this component when a compact, integrated solution for high-side current monitoring is required without external gain resistors. The +20V/V gain is suitable for applications requiring lower output voltage swings compared to higher gain variants. Consider the latching comparator feature for critical power protection circuits where oscillation must be prevented. Verify that the 50µA quiescent current meets the system's battery life constraints.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of micropower current-sense supervisors. While the MAX4374 and MAX4375 offer additional comparators for window detection functions in larger packages, the MAX4373 provides a single-channel solution in an 8-pin footprint. The TEUA variant specifically denotes the +20V/V gain version in the 8-pin µMAX package.

Replacement Considerations

Direct substitutes within the same family include MAX4373FEUA+ (Gain +50V/V) and MAX4373HEUA+ (Gain +100V/V), provided the application can accommodate the different full-scale sense voltages and output scaling. Other pin-compatible options may exist but require verification of gain and package specifications.