MAX4375FEUB+T

Overview

The MAX4375FEUB+T is a low-cost, micropower high-side current-sense supervisor integrating a current-sense amplifier, bandgap reference, and comparator with latching output. It operates from a single +2.7V to +28V supply with a typical supply current of 50µA. The device features a +50V/V gain version, a 0 to +28V input common-mode range independent of the supply voltage, and an operating temperature range of -40°C to +85°C. It is housed in a 10-pin µMAX package.

Feature Summary

• Integrates a high-side current-sense amplifier, internal bandgap reference, and a latching comparator for simplified overcurrent protection without oscillation.
• Features a wide 0V to +28V common-mode input range that remains functional even during deep battery discharge conditions.
• Provides a second comparator channel specifically designed to enable window-detection functions for precise current monitoring.

Applications

• Notebook Computers
• Portable/Battery-Powered Systems
• Smart Battery Packs/Chargers
• Cell Phones

Procurement Notes

Verify the specific suffix 'FEUB+' against official manufacturer documentation to confirm the exact pinout, gain configuration, and lead-free status. Ensure compatibility with the required 10-pin µMAX footprint and validate that the +50V/V gain meets the system's sensitivity requirements before finalizing procurement.

Selection Notes

Select this component when a dual-comparator architecture is required for window detection alongside standard high-side current sensing. The +50V/V gain setting offers a balance between sensitivity and output voltage swing compared to the +20V/V or +100V/V alternatives. Verify that the external sense resistor can handle the expected power dissipation for the target load currents.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of micropower current-sense supervisors. While the MAX4373 provides a single comparator and the MAX4374 offers two comparators, the MAX4375 variant includes two comparators with inverted logic polarities on the second channel relative to the MAX4374, enabling flexible window detection configurations.

Replacement Considerations

Direct substitutes within the same family include MAX4375TEUB+ (Gain +20V/V) and MAX4375HEUB+ (Gain +100V/V). Cross-family replacements require verifying identical gain, package dimensions, and comparator logic polarity.

FAQ

How does the MAX4375 differ from the MAX4374?

Both devices feature two comparators, but the MAX4375 has inverted logic on the second comparator (CIN2/COUT2) compared to the MAX4374, allowing for different window detection circuit topologies.

What is the function of the RESET pin?

The RESET pin controls the latching output of the first comparator. Holding it low disables the latch, while pulsing it low for at least 1.5µs resets the latch after an overcurrent event.