MAX4374HEUB-T

Overview

The MAX4374HEUB-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 a typical supply current of 50µA. The device provides a voltage output proportional to the sense resistor voltage drop, eliminating external gain-setting resistors. It supports a 0V to +28V common-mode input range independent of the supply voltage. The specific HEUB suffix indicates a +100V/V gain version housed in a 10-pin µMAX package.

Feature Summary

• Integrated high-side current-sense amplifier with internal bandgap reference
• Latching open-drain comparator output prevents oscillation during overcurrent events
• Second comparator enables window-detection functionality for precise current monitoring
• Voltage output design removes 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 that the ordering suffix matches the required gain (+100V/V) and package type (10-pin µMAX). Confirm the temperature range specification (-40°C to +85°C) aligns with system requirements. Ensure the component is lead-free and RoHS-compliant as indicated by the '+' designation. Cross-reference the datasheet revision history for any updates to electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select this component when high-side current monitoring is required without interfering with the ground path. The +100V/V gain is suitable for applications requiring high sensitivity with small sense resistors. The dual-comparator architecture allows for complex protection schemes like window detection. Consider the 50µA quiescent current for strict power budget constraints in portable devices.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of supervisors. The MAX4374 variant specifically includes two comparators, unlike the MAX4373 which has one. The 'H' suffix denotes the +100V/V gain option, while 'F' is +50V/V and 'T' is +20V/V. The 'UB' indicates the 10-pin µMAX package format.

Replacement Considerations

MAX4374TEUB+ offers +20V/V gain in the same package. MAX4374FEUB+ provides +50V/V gain. For single-comparator needs, MAX4373 variants are available. Verify gain accuracy and package compatibility when substituting.