MAX4375HESD-T

Overview

The MAX4375HESD-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 50µA typical supply current. The device features a 0 to +28V input common-mode range independent of supply voltage. The H suffix indicates a fixed gain of +100V/V. It includes an internal 600mV comparator threshold and supports window detection via a second comparator.

Feature Summary

• Integrates a high-side current-sense amplifier, bandgap reference, and comparator with latching output for simplified monitoring.
• Features a 0V to +28V input common-mode range that remains functional even during deep battery discharge.
• Includes a second comparator in the MAX4375 variant to enable window-detection functions for precise current limits.

Applications

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

Procurement Notes

Verify the specific package type and temperature rating against the datasheet before procurement. Confirm the gain version matches the application requirements. Check for RoHS compliance status if required by the design specifications. Ensure the ordering suffix corresponds to the correct tape-and-reel or tube packaging format intended for the manufacturing process.

Selection Notes

Select the MAX4375 over the MAX4373 when window detection capabilities are required for both upper and lower current limits. Choose the H gain variant (+100V/V) for applications requiring higher sensitivity with smaller sense resistors. Ensure the supply voltage range aligns with the system's operational requirements between 2.7V and 28V.

Part Context

This component belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower high-side current-sense supervisors. These ICs are designed to provide integrated solutions for battery and DC current monitoring in portable electronics. The family offers varying levels of integration, including single or dual comparators, to suit different system complexity needs.

Replacement Considerations

MAX4375FESD+ (Gain +50V/V)

FAQ

What is the function of the RESET pin?

The RESET pin controls the latch function of the first comparator. Holding it low resets the output latch, allowing the comparator to become transparent again.

How does the MAX4375 support window detection?

The MAX4375 contains a second comparator accessible via the CIN2 and COUT2 pins, enabling the configuration of both upper and lower current thresholds for window detection.