MAX4375TEUB

Overview

The MAX4375TEUB+ 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 0 to +28V input common-mode range independent of the supply voltage. It offers a fixed gain of +20V/V, a maximum full-scale accuracy of 2%, and an internal bandgap reference with ±1.6% accuracy. The operating temperature range is -40°C to +85°C.

Feature Summary

• Integrates a high-side current-sense amplifier, bandgap reference, and comparator with latching output for simplified monitoring.
• Features a 0V to +28V common-mode input range that remains functional even during deep battery discharge.
• Provides a latching comparator output to prevent oscillation during overcurrent shutdown events.
• Includes a second comparator dedicated to window-detection functions.

Applications

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

Procurement Notes

Verify the specific suffix 'TEUB' corresponds to the 10-pin µMAX package and +20V/V gain configuration as documented in the official Analog Devices ordering information. Confirm RoHS compliance status indicated by the '+' designation. Ensure the component meets the extended temperature requirements of -40°C to +85°C for your specific application environment before finalizing procurement.

Selection Notes

Select this component when high-side current monitoring is required without interfering with the ground path. The +20V/V gain is suitable for applications requiring lower sensitivity compared to the +50V/V or +100V/V variants. The integrated latching comparator simplifies overcurrent protection circuits by eliminating oscillation risks. Verify that the external sense resistor can handle the expected power dissipation.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower current-sense supervisors. While the MAX4373 provides a single comparator and the MAX4374 offers dual comparators for window detection, the MAX4375 specifically includes two comparators configured for window detection functionality. All variants share the same core amplifier architecture and power specifications.

Replacement Considerations

Public confirmed substitute part numbers: MAX4375FEUB+, MAX4375HEUB+, MAX4375TESD+, MAX4375FESD+, MAX4375HESD+. These parts share the same package type but differ in gain (+50V/V or +100V/V) or package style (14-pin SO).

FAQ

How does the MAX4375 handle overcurrent conditions?

The MAX4375 utilizes a latching comparator output that shuts down the power supply without oscillating. The latch can be reset by pulsing the RESET pin low for at least 1.5µs.

What is the function of the CIN2 pin on the MAX4375?

The CIN2 pin serves as the input for the second internal comparator, enabling window-detection functions by allowing the device to monitor if the current stays within a specific upper and lower threshold.