MAX4375FEUB

Overview

The MAX4375FEUB+ 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 +50V/V gain version in an 8-pin µMAX package. The device operates from a single +2.7V to +28V supply, consuming 50µA. It supports a 0V to +28V common-mode input range independent of supply voltage. The internal comparator threshold is typically 600mV, with a propagation delay of 4µs. Full-scale accuracy is ±2% maximum, and the output is internally clamped at 12V for the +100V/V gain variant.

Feature Summary

• Integrates a high-side current-sense amplifier, bandgap reference, and comparator with latching output to eliminate oscillation during turn-off events.
• Features a voltage output that removes the need for external gain-setting resistors, simplifying circuit design.
• Provides a 0V to +28V common-mode input range independent of the supply voltage, ensuring functionality even during deep battery discharge.
• Includes a second comparator in the MAX4375 variant to enable window-detection functions for precise current monitoring.

Applications

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

Procurement Notes

Verify the specific suffix 'FEUB' corresponds to the +50V/V gain and 8-pin µMAX package configuration. Confirm RoHS compliance status indicated by the '+' symbol. Ensure the operating temperature range matches the -40°C to +85°C specification required for the application environment. Check for any lead-free packaging requirements if applicable to the assembly process.

Selection Notes

Select this component when high-side current monitoring is required without interfering with the ground path. The +50V/V gain is suitable for applications requiring moderate sensitivity. Consider the MAX4374 or MAX4375 variants if window detection capabilities are needed. Ensure the sense resistor value allows the differential voltage to stay within the full-scale limits while minimizing power dissipation.

Part Context

This part belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower high-side current-sense supervisors. The family offers three gain versions (+20V/V, +50V/V, +100V/V) and multiple package options including µMAX and SO. These devices are designed for battery/DC current monitoring in portable electronics where space and power consumption are critical constraints.

Replacement Considerations

Direct substitutes include other parts from the MAX4373/MAX4374/MAX4375 family with matching gain and package. Verify pin compatibility and electrical characteristics such as common-mode range and supply current before substitution.