Analog Devices Inc./Maxim Integrated MAX4375TEUB-T

Overview

MAX4375TEUB-T from Maxim Integrated is a micropower, high-side current-sense amplifier with integrated latching comparator and 600mV bandgap reference, designed for overcurrent supervision in battery-powered systems. It features +20V/V gain, 0V to +28V input common-mode range independent of supply, 1mV max input offset voltage, and 50µA supply current - enabling precise, low-power current monitoring in notebook computers, smart battery chargers, and portable power-management systems.

For engineers reviewing the MAX4375TEUB-T datasheet, MAX4375TEUB-T pinout, MAX4375TEUB-T application, or MAX4375TEUB-T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in Maxim's official specifications for the 10-pin µMAX package, T-gain variant, and -40°C to +85°C operation.

Technical Context

The MAX4375TEUB-T implements a single high-side current-sense amplifier with fixed +20V/V gain and a latching open-drain comparator whose negative input is tied to an internal 600mV reference. Its 0V to +28V common-mode input range remains functional even during deep battery discharge, and its supply voltage operates independently from RS+ potential.

It includes a second open-drain comparator (COUT2) configured for window detection: CIN2 serves as the positive input for MAX4374 and negative input for MAX4375, but for MAX4375TEUB-T, CIN2 is the negative terminal referenced to 600mV - enabling undercurrent detection when paired with COUT1's overcurrent flag.

Key Specifications

Pinout & Package

MAX4375TEUB-T is housed in a 10-pin µMAX package (outline 21-0061, land pattern 90-0330), featuring an exposed thermal pad for enhanced power dissipation and board-level thermal management in compact portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current-sense amplifier with comparator applications.

Compared with MAX4374TEUB+, MAX4375TEUB-T adds window-detection capability via CIN2/COUT2 - enabling autonomous undercurrent detection without MCU involvement. Compared with INA219BIDR, it delivers deterministic, zero-latency hardware latching at lower power and BOM cost, but lacks digital configurability.

Availability

MAX4375TEUB-T is available at Aetrix Electronics and suitable for smart battery packs, notebook power subsystems, and industrial IoT sensor nodes requiring stable component supply across long production lifecycles.

Supply support for MAX4375TEUB-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in demanding environments.

The MAX4375 is part of Maxim's high-side current-sense supervisor family, engineered specifically for battery-powered and portable systems where ground-path integrity, ultra-low power, and hardware-fault autonomy are essential.

FAQ

What is the function of the RESET pin on the MAX4375TEUB-T?

The RESET pin controls the latch state of the primary comparator (COUT1). When held high (>2.0V), the comparator output latches upon overcurrent detection and remains latched until RESET is pulsed low (<0.8V) for ≥1.5µs. During power-up, RESET must be held low until VCC exceeds 2.7V to prevent false triggering. The MAX4375TEUB-T requires this external reset coordination to ensure reliable fault recovery in battery-supervised systems.

Does the MAX4375TEUB-T support low-side current sensing?

Yes, the MAX4375TEUB-T can be used for low-side sensing by connecting RS+ to the load side and RS- to ground. However, total output voltage error increases significantly when VRS+ falls below 2V - as confirmed in the Electrical Characteristics table and typical curves (toc02, toc08). For best accuracy, high-side placement is recommended; low-side use is viable only where <2% full-scale error is acceptable at sub-2V common-mode voltages.

What is the maximum sense voltage supported by the MAX4375TEUB-T?

The MAX4375TEUB-T supports a full-scale sense voltage (VSENSE = VRS+ − VRS−) of 100mV for the +20V/V gain version. This yields a 2.0V output at full scale. The output is internally clamped at 12V, but for MAX4375TEUB-T, the practical maximum output is limited by the 100mV input limit and +20V/V gain. Exceeding 100mV risks violating the differential input voltage rating (±0.3V) and degrading accuracy per the gain accuracy and offset specs.

How does the MAX4375TEUB-T achieve common-mode independence from supply voltage?

The MAX4375TEUB-T achieves supply-independent common-mode operation through proprietary input stage design that decouples RS+/RS- biasing from VCC. Its 0V to +28V common-mode range is guaranteed regardless of whether VCC is 2.7V or 28V - verified by test conditions in the Electrical Characteristics table (VCC = 0V, VRS+ = 28V). This allows the MAX4375TEUB-T to monitor battery voltage directly during deep discharge while powered from a separate regulated rail, preserving supervision integrity.

Can the MAX4375TEUB-T be used with a 5V-only system?

Yes, the MAX4375TEUB-T operates fully within a 2.7V to 28V supply range, making it compatible with 5V systems. At VCC = 5V, its 50µA supply current, 600mV comparator threshold, and 2V full-scale output (at 100mV VSENSE) remain valid. Pull-up resistors for COUT1/COUT2 should be referenced to ≤5V (per absolute max rating), and RESET logic levels must comply with VIH ≥2.0V and VIL ≤0.8V. All electrical characteristics in the datasheet include 5V test conditions.