MAX4373TESA

Overview

The MAX4373TESA+ 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, a 0V to +28V common-mode input range independent of 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 0V to +28V common-mode input range that remains functional even when the supply voltage drops below the common-mode level, ensuring monitoring capability during deep battery discharge.
• Provides a voltage output proportional to the sense resistor voltage 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 'T' indicates tape-and-reel packaging if required by assembly equipment. Confirm the '+' suffix denotes lead-free/RoHS compliance status. Ensure the selected gain version (+20V/V) aligns with the target full-scale sense voltage requirements. Check for any obsolescence notices or limited availability warnings from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component for applications requiring integrated high-side current monitoring without external gain resistors. The +20V/V gain is suitable for higher full-scale sense voltages compared to other variants. Consider the latching comparator feature for critical power-supply shutdown protection where oscillation must be avoided. Verify that the 8-pin SO package footprint fits the design constraints.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower current-sense supervisors. The MAX4373 variant specifically includes one comparator with a latching output. Other family members like the MAX4374 and MAX4375 offer additional comparators for window-detection functions. The family shares similar electrical characteristics but differs in pin count and comparator configurations.

Replacement Considerations

Direct replacements within the same family include MAX4373FEUA+, MAX4373HEUA+, MAX4373FESA+, and MAX4373HESA+. These parts share the same package and temperature range but differ in gain (+50V/V or +100V/V). Ensure the gain difference does not exceed the maximum output voltage limits of the application circuit.