MAX4373HESA+T

Overview

The MAX4373HESA+T is a low-cost, micropower high-side current-sense supervisor featuring an integrated amplifier, comparator with latching output, and bandgap reference. It operates from a single +2.7V to +28V supply with 50µA typical supply current. The device offers a gain of +100V/V, a 0 to +28V common-mode input range independent of supply voltage, and a maximum full-scale accuracy of 2%. It is housed in an 8-pin SO package and specified for the -40°C to +85°C temperature range.

Feature Summary

• Integrated high-side current-sense amplifier with voltage output eliminates external gain-setting resistors.
• Latching comparator output provides a stable turn-off flag that prevents oscillation during overcurrent events.
• High-accuracy operation down to 0V common-mode voltage ensures monitoring viability even during deep battery discharge.

Applications

• Notebook computers
• Portable and battery-powered systems
• Smart battery packs and chargers
• Cell phones
• Power-management systems

Procurement Notes

Verify the suffix 'E' corresponds to the 8-pin SO package and 'H' indicates the +100V/V gain configuration. Confirm the '+T' designation aligns with the specific reel or tape-and-reel packaging requirements for your assembly line. Ensure the component meets RoHS compliance standards as indicated by the '+' symbol in the part number.

Selection Notes

Select this variant when a fixed +100V/V gain is required for precise current sensing applications. The 8-pin SO package is suitable for surface-mount assembly where space constraints allow for standard footprint dimensions. Consider the latching comparator feature if system stability against transient overcurrent spikes is critical for power management logic.

Part Context

This component belongs to the MAX4373/MAX4374/MAX4375 family of micropower current-sense supervisors. While the MAX4373 provides a single latching comparator, the MAX4374 and MAX4375 variants include an additional comparator for window-detection functions. All variants share similar electrical characteristics but differ in pin count and comparator configurations.

Replacement Considerations

Direct substitutes within the same family include MAX4373TEUA+, MAX4373TESA+, MAX4373FEUA+, and MAX4373FESA+. These parts offer different gain values (+20V/V or +50V/V) or packages (µMAX). Verify that the alternative gain setting matches the sensitivity requirements of the external sense resistor network.