Analog Devices Inc./Maxim Integrated MAX4372TEBT+T

Overview

MAX4372TEBT+T from Maxim Integrated is a precision high-side current-sense amplifier in a 3 × 2 UCSP (1mm × 1.5mm) package, featuring 20V/V fixed gain, 0.3mV input offset voltage, 0.18% full-scale accuracy, and 30μA supply current. It operates from 2.7V to 28V and supports 0V–28V input common-mode range independent of supply-enabling accurate battery discharge monitoring in portable systems.

For engineers reviewing the MAX4372TEBT+T datasheet, MAX4372TEBT+T pinout, MAX4372TEBT+T application, or MAX4372TEBT+T equivalent, this device delivers micropower operation, voltage-output architecture eliminating external gain resistors, and validated performance across -40°C to +85°C for notebook, smart-battery, and cell phone current-monitoring designs.

Technical Context

The MAX4372TEBT+T implements a high-impedance current-mirror-based sensing architecture with internal gain-setting resistors, delivering a precise voltage output proportional to V_SENSE = V_RS+ − V_RS−. Its input common-mode range (0V–28V) remains fully functional even when V_CC is as low as 2.7V-critical for deep-discharge battery monitoring where V_RS+ may drop near 0V while V_CC remains nominal.

It features rail-to-rail output swing capability (V_OH ≤ V_CC − 0.25V, V_OL ≤ 65mV at 100μA), 1.5Ω output impedance, and stable operation with up to 1000pF capacitive load. Gain accuracy is ±0.25% (typ) at +25°C and ±5.5% over temperature, with total output error under ±0.15% at V_SENSE = 100mV, V_CC = 12V, V_RS+ = 12V.

Key Specifications

Pinout & Package

MAX4372TEBT+T uses a 3 × 2 UCSP (ultra-thin chip-scale package), 1mm × 1.5mm footprint, 0.5mm pitch, RoHS-compliant, with bumps on bottom. Pin mapping is defined by bump position per datasheet Figure "Pin Configurations" and "Pin/Bump Description".

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4372TEUK+T, the MAX4372TEBT+T saves >70% board area and maintains identical accuracy specs in a thermally efficient UCSP; versus INA219AIDR, it offers lower power, wider common-mode range including 0V, and deterministic analog response-critical for safety-critical overcurrent detection.

Availability

MAX4372TEBT+T is available at Aetrix Electronics and suitable for notebook computers, smart-battery packs, and cell phone chargers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MAX4372TEBT+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) is a semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for industrial, computing, and portable applications.

The MAX4372 family was designed specifically for high-side current sensing in battery-powered systems-prioritizing micropower consumption, wide common-mode range, and compact packaging to enable accurate, non-intrusive current monitoring.

FAQ

What is the operating temperature range for MAX4372TEBT+T?

The MAX4372TEBT+T is specified for continuous operation from −40°C to +85°C. This range is guaranteed across all electrical parameters including gain accuracy (±5.5%), input offset voltage (±1.9mV), and supply current (30μA typ). The device uses BiCMOS process technology optimized for stability across this industrial temperature span, making MAX4372TEBT+T suitable for automotive cabin modules and outdoor portable electronics.

Does MAX4372TEBT+T require external gain-setting resistors?

No, MAX4372TEBT+T does not require external gain-setting resistors. It integrates precision internal resistors to deliver a fixed 20V/V gain, producing a voltage output directly proportional to the sense resistor voltage drop. This eliminates resistor matching errors, temperature drift, and PCB layout sensitivity-reducing design complexity and improving long-term accuracy compared to discrete op-amp solutions. The MAX4372TEBT+T achieves this while maintaining only 30μA quiescent current.

Can MAX4372TEBT+T monitor current when the battery voltage drops to 0V?

Yes, MAX4372TEBT+T supports input common-mode voltages down to 0V independent of supply voltage, enabling valid current measurement even during deep battery discharge where V_RS+ approaches 0V. This is confirmed in the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables, which specify V_CMR = 0V to 28V. The internal architecture ensures functionality at 0V common-mode, a key differentiator for MAX4372TEBT+T in single-cell Li-ion and multi-cell pack monitoring.

What is the maximum capacitive load the MAX4372TEBT+T output can drive?

The MAX4372TEBT+T output is stable with capacitive loads up to 1000pF, as verified in the Typical Operating Characteristics section (Figure MAX4372 toc17: "Capacitive-Load Stability"). This allows direct connection to microcontroller ADC inputs with standard 10–100pF sampling capacitance, or to RC filters for noise reduction without risk of oscillation. The 1.5Ω output impedance further ensures minimal interaction with downstream capacitance, preserving bandwidth and settling time performance.

How does the UCSP package of MAX4372TEBT+T impact thermal performance?

The 3 × 2 UCSP package of MAX4372TEBT+T provides superior thermal resistance compared to SOT23-5: its θ_JA is 294°C/W (derated from 273.2mW at +70°C), versus 321°C/W for SOT23-5. This results in ~10% lower junction temperature rise under identical 30μA load conditions. The UCSP's direct silicon-to-PCB thermal path-enabled by solder bumps-enhances reliability in compact, sealed enclosures typical of medical and handheld devices where MAX4372TEBT+T is deployed.