Analog Devices Inc./Maxim Integrated MAX4375TEUB-TG075

Overview

MAX4375TEUB-TG075 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 voltage, 1mV max input offset voltage, and operates from +2.7V to +28V while consuming only 50µA. It is used in smart battery chargers to detect overcurrent without disrupting ground paths.

For engineers reviewing the MAX4375TEUB-TG075 datasheet, MAX4375TEUB-TG075 pinout, MAX4375TEUB-TG075 application, or MAX4375TEUB-TG075 equivalent, key selection considerations include its latched comparator output for stable fault flagging, 10-pin µMAX® package compatibility, +20V/V fixed gain for mid-range battery pack monitoring, and operation down to 0V common-mode for deep-discharge battery tracking.

Technical Context

The MAX4375TEUB-TG075 implements a single high-side current-sense amplifier with rail-to-rail output, internal 600mV reference, and two open-drain comparators - one latched (COUT1) and one unlatched (COUT2) - enabling window-detection functionality. Its 0V to +28V common-mode input range remains functional even when VCC is at minimum +2.7V, ensuring reliability during battery deep discharge.

It uses an external sense resistor to convert load current into differential voltage (VSENSE), amplified by fixed +20V/V gain to produce proportional output voltage (VOUT). The latching comparator triggers at ~600mV on CIN1 and holds until RESET is pulsed low for ≥1.5µs, eliminating oscillation during sustained overcurrent events.

Key Specifications

Pinout & Package

MAX4375TEUB-TG075 is housed in a 10-pin µMAX® package (package code U10+2), RoHS-compliant, with 0.5mm pitch and exposed pad for thermal enhancement. Pin 1 is marked with dot; pin count and orientation follow JEDEC MO-220 standards.

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-TG075 offers configurable CIN2 polarity for flexible window detection, while compared with INA219BIDR it delivers deterministic, zero-latency hardware fault assertion - critical for safety-critical overcurrent protection where MCU intervention cannot be relied upon.

Availability

MAX4375TEUB-TG075 is available at Aetrix Electronics and suitable for smart battery chargers, portable medical devices, industrial IoT edge nodes, and USB-C power delivery systems requiring stable component supply across long production lifecycles.

Supply support for MAX4375TEUB-TG075 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 connectivity applications, with emphasis on low-power, high-reliability solutions for portable and industrial systems.

The MAX437x family was developed specifically for high-side current monitoring in battery management and power-supply supervision, integrating amplifier, reference, and comparator to reduce board space and improve fault-response determinism.

FAQ

What is the function of the RESET pin on the MAX4375TEUB-TG075?

The RESET pin controls the latching behavior of the primary comparator output (COUT1). When held high (>2.0V), COUT1 latches open upon overcurrent detection and remains asserted until RESET is pulsed low for ≥1.5µs. Holding RESET low makes the comparator transparent, allowing real-time tracking of CIN1. This dual-mode operation enables both autonomous fault lockout and dynamic current monitoring in the same MAX4375TEUB-TG075 device.

Does the MAX4375TEUB-TG075 support low-side current sensing?

Yes, the MAX4375TEUB-TG075 can be used for low-side current sensing by connecting RS+ to the load and RS- to ground. However, total output voltage error increases when VRS+ falls below 2V, as specified in the Electrical Characteristics table. For optimal accuracy in low-side configurations, keep VRS+ ≥2V or use the device strictly in high-side mode where its 0V–28V common-mode range delivers guaranteed performance across the full battery discharge curve.

What is the maximum sense resistor value supported by the MAX4375TEUB-TG075 at full-scale 150mV?

For a full-scale sense voltage of 150mV and +20V/V gain, the MAX4375TEUB-TG075 produces 3.0V output. The maximum RSENSE is determined by the maximum load current: RSENSE(max) = 150mV / ILOAD(max). For example, at 10A load, RSENSE ≤ 15mΩ. Power dissipation must also be considered: P = I²×R. A 10A/15mΩ resistor dissipates 1.5W - select a current-sense resistor rated for ≥2W with low TCR to maintain accuracy under thermal stress in the MAX4375TEUB-TG075 application.

How does the MAX4375TEUB-TG075 achieve accuracy down to 0V common-mode voltage?

The MAX4375TEUB-TG075 achieves 0V common-mode operation through proprietary input stage design that decouples the sense amplifier's biasing from VCC. Its internal circuitry maintains valid operation even when RS+ and RS- are at 0V - critical for detecting overcurrent during battery deep discharge. This is verified in the Electrical Characteristics table under "Common-Mode Input Range" (0V to +28V) and confirmed in Typical Operating Characteristics plots showing stable output error across the full 0–28V range, independent of VCC level in the MAX4375TEUB-TG075 datasheet.

Can the COUT2 output of the MAX4375TEUB-TG075 be used independently of COUT1?

Yes, COUT2 is an independent, unlatched open-drain comparator output referenced to the internal 600mV bandgap. In the MAX4375TEUB-TG075, CIN2 serves as the positive input to this comparator, while its negative input is internally tied to 600mV. This allows COUT2 to provide real-time, non-latching indication of current exceeding a second threshold - for example, used alongside COUT1 to implement hysteresis or dual-level alerts without software intervention in the MAX4375TEUB-TG075 application.