MAX4374TEUB

Overview

The MAX4374TEUB+ is a low-cost, micropower high-side current-sense supervisor featuring an integrated amplifier, comparator with latching output, and bandgap reference. It operates from a single +2.7V to +28V supply with a typical supply current of 50µA. The device provides a voltage output proportional to the sense resistor voltage drop, eliminating external gain-setting resistors. It supports a common-mode input range of 0V to +28V, independent of the supply voltage. The part is available in a 10-pin µMAX package and is specified for operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated high-side current-sensing solution simplifies monitoring by combining an amplifier, comparator, and reference.
• Latching comparator output prevents oscillation during turn-off events, providing a stable flag.
• Second comparator enables window-detection functions for precise current threshold management.
• Voltage output architecture removes the need for external gain-setting resistors.

Applications

• Notebook computers
• Portable and battery-powered systems
• Smart battery packs and 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 listed in the official ordering information. Confirm that the '+' designation indicates lead-free/RoHS compliance. Ensure the component meets the required operating temperature range of -40°C to +85°C for your application environment.

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 or higher full-scale sense voltages compared to the +50V/V or +100V/V variants. Consider the latching output feature if oscillation-free shutdown signaling is necessary for system protection.

Part Context

This device belongs to the MAX4373/MAX4374/MAX4375 family of low-cost, micropower current-sense supervisors. While the MAX4373 includes one comparator, the MAX4374 adds a second comparator for window detection. All variants share similar electrical characteristics but differ in pin count, package options, and gain configurations.

Replacement Considerations

Direct substitutes within the same family include MAX4374FEUB+ (Gain +50V/V) and MAX4374HEUB+ (Gain +100V/V), provided the gain difference is acceptable for the circuit design. Other packages such as MAX4374TESD+ offer the same functionality in a 14-pin SO format.

FAQ

How does the MAX4374 handle deep discharge conditions?

The device features a 0V to +28V input common-mode range that is independent of the supply voltage, ensuring current-sense feedback remains viable even when connected to a battery pack in deep discharge.

What is the function of the RESET pin?

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