MAX4375TESD+

Overview

The MAX4375TESD+ is a low-cost, micropower high-side current-sense supervisor integrating a current-sense amplifier, bandgap reference, and comparator with latching output. It features a +20V/V gain, operates from a single +2.7V to +28V supply, and consumes 50µA. The device provides a 0 to +28V input common-mode range independent of the supply voltage. It includes an internal 600mV reference for the comparator threshold and offers a latching open-drain output to prevent oscillation during overcurrent events.

Feature Summary

• Integrates a high-side current-sense amplifier, bandgap reference, and latching comparator in a single solution
• Features a +20V/V fixed gain version that eliminates the need for external gain-setting resistors
• Provides a latching open-drain comparator output to ensure stable turn-off flags without oscillation
• Supports window-detection functions via a second comparator accessible through dedicated pins

Applications

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

Procurement Notes

Verify the specific suffix 'SD' corresponds to the 14-pin SO package when sourcing replacements. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the selected variant matches the required +20V/V gain configuration. Check for availability constraints as this component family may have limited stock or end-of-life statuses depending on the distributor.

Selection Notes

Select the MAX4375TESD+ when a second comparator is required for window detection applications alongside primary current limiting. Choose this part over the MAX4373 if dual-comparator functionality is necessary. Verify that the +20V/V gain aligns with the desired full-scale sense voltage and load current requirements. Ensure the 14-pin SO package fits the available board space compared to the 8-pin alternatives.

Part Context

This component belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower high-side current-sense supervisors. The MAX4375 specifically distinguishes itself by including two comparators for window detection, whereas the MAX4373 has one and the MAX4374 has two but with different pinout configurations. All variants share the same core amplifier and reference architecture.

Replacement Considerations

Direct substitutes within the same family include MAX4375FEUB+, MAX4375HEUB+, MAX4375FESD+, and MAX4375HESD+. These parts offer alternative gains (+50V/V or +100V/V) or packages (µMAX). Ensure the replacement maintains the +20V/V gain requirement if using a different suffix.