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Analog Devices Inc./Maxim Integrated MAX4372TEUK-T
- Part No.:
- MAX4372TEUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4372TEUK-T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,762
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Product details
Overview
MAX4372TEUK-T from Maxim Integrated is a precision high-side current-sense amplifier in a 5-pin SOT23 package, featuring 20V/V fixed gain, 2.7V to 28V supply operation, 30μA quiescent current, and 0.3mV input offset voltage. It delivers voltage-output current monitoring for battery-powered systems where ground-path integrity and low-power sensing are critical-such as notebook computers and smart-battery chargers.
For engineers reviewing the MAX4372TEUK-T datasheet, MAX4372TEUK-T pinout, MAX4372TEUK-T application, or MAX4372TEUK-T equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for high-side current sensing in portable and embedded power-management designs.
Technical Context
The MAX4372TEUK-T implements a high-impedance current-mirror architecture with internal gain-setting resistors, enabling direct voltage output proportional to sensed differential voltage (VRS+ − VRS−). Its 0V to 28V input common-mode range operates independently of VCC, supporting deep-discharge battery monitoring without ground interference.
It features rail-to-rail output capability (VOUT up to VCC − 0.25V), 1.5Ω output impedance, and 275kHz −3dB bandwidth at 20V/V gain. Power-up time is 0.5ms, and saturation recovery completes within 0.1ms-enabling fast transient response in dynamic load monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output = 2.0V for 100mV sense voltage, simplifying ADC interface design |
| Supply Voltage Range | 2.7V to 28V - supports single-supply operation across Li-ion, multi-cell, and industrial DC rails |
| Input Common-Mode Range | 0V to 28V - enables sensing at battery anode even during deep discharge (e.g., 0.1V cell voltage) |
| Supply Current | 30μA typical - minimizes parasitic drain in always-on battery-monitoring circuits |
| Input Offset Voltage | ±0.8mV max at +25°C - limits error to ≤0.4% of full-scale 100mV sense voltage |
| Full-Scale Accuracy | ±0.18% - ensures calibrated current measurement without external trimming |
| Output Impedance | 1.5Ω - drives 1MΩ ADC inputs directly; avoids buffer stages in compact layouts |
Pinout & Package
The MAX4372TEUK-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+1, outline 21-0057) with 0.95mm pitch and 2.9mm × 1.6mm footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and output stage; must connect to system power ground |
| 2 | OUT | Voltage output proportional to sensed current; drives ADC or comparator with 1.5Ω source impedance |
| 3 | VCC | Positive supply input; requires ≥0.1μF local decoupling capacitor for stability |
| 4 | RS+ | High-side connection to sense resistor; accepts common-mode voltages up to 28V independent of VCC |
| 5 | RS− | Load-side connection to sense resistor; forms differential input pair with RS+ for current sensing |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20V/V gain | Eliminates external gain-setting resistors, reducing BOM count and layout area in space-constrained SOT23 designs |
| 0.18% full-scale accuracy | Enables ±0.18% current measurement error without calibration-critical for battery fuel gauging compliance |
| 30μA supply current | Extends runtime in always-on current monitoring (e.g., smart-battery standby mode) by minimizing quiescent drain |
| 0V to 28V common-mode range | Permits direct sensing at battery anode during deep discharge (e.g., 0.1V–2.5V per cell), preserving ground path integrity |
| 1.5Ω output impedance | Allows direct connection to 12-bit+ SAR ADCs without buffering, reducing component count and signal path error |
Applications
| Notebook Computer Power Monitoring | Smart-Battery Charger Interface |
|---|---|
Use Scenario: Real-time battery discharge current tracking during CPU/GPU load transients to enable adaptive power throttling and thermal management. IC Role / Device Role / Timing Role: High-side current-sense amplifier measuring current flow from battery anode into system power rail, independent of charger ground return path. Use Value: Enables accurate state-of-charge estimation with <0.2% full-scale error, supporting JEITA-compliant battery management without ground-loop interference. | Use Scenario: Monitoring charge current during CC/CV phases in USB-C PD or proprietary smart-battery chargers with dual-path charging. IC Role / Device Role / Timing Role: High-side current sensor placed between battery pack and charge controller, providing isolated feedback for precise current regulation. Use Value: Maintains measurement validity down to 0V common-mode, ensuring accurate current reporting even when battery voltage drops below 1V during end-of-charge termination. |
| Portable Medical Device Battery Safety | Industrial IoT Sensor Node Power Audit |
Use Scenario: Continuous current monitoring in handheld ultrasound or glucose meters to detect abnormal battery drain indicating firmware faults or leakage paths. IC Role / Device Role / Timing Role: Micropower current-sense amplifier operating from 3.3V system rail while monitoring 0–5A battery discharge through 10mΩ shunt. Use Value: 30μA supply current and 0.3mV offset ensure sub-1mA detection threshold-critical for identifying microamp-level fault currents before thermal runaway. | Use Scenario: Periodic power consumption profiling of LoRaWAN or NB-IoT edge nodes during sleep/wake cycles to validate energy budget models. IC Role / Device Role / Timing Role: Low-quiescent current sense amplifier triggered only during active measurement windows to minimize impact on average node current. Use Value: 0.5ms power-up time and 20μs settling allow full-scale current capture within 25μs-enabling precise per-cycle energy accounting without extending wake time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4080TASA+ | Higher 120V/V gain option; 125kHz bandwidth; SO-8 package; ±0.5mV offset | Requires PCB redesign for 8-pin SO footprint; better suited for higher-gain, lower-bandwidth precision sensing | Select when >20V/V gain is needed and SOT23 board space is unavailable |
| INA219AIDR | I²C digital output; integrated 12-bit ADC; 26V common-mode; 0.1% gain error; SO-8 | Replaces analog signal chain with digital interface; adds firmware dependency and I²C routing complexity | Select when system already uses I²C infrastructure and digital calibration is preferred over analog simplicity |
Compared with MAX4372TEUK-T, MAX4080TASA+ offers higher gain but requires larger packaging and slower response, while INA219AIDR trades analog simplicity for digital integration-making MAX4372TEUK-T optimal for compact, low-power, analog-output high-side sensing where minimal BOM and layout area are prioritized.
Availability
MAX4372TEUK-T is available at Aetrix Electronics and suitable for notebook computer power management, smart-battery charger feedback, and portable medical device battery safety applications requiring stable component supply and long-term production continuity.
Supply support for MAX4372TEUK-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 high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and consumer applications.
The MAX4372 family was designed specifically for micropower, high-side current sensing in battery-critical systems-emphasizing ground-path independence, wide common-mode range, and minimal external components.
FAQ
What is the maximum common-mode voltage the MAX4372TEUK-T can handle?
The MAX4372TEUK-T supports a 0V to 28V input common-mode range that is fully independent of its supply voltage (VCC). This means it can accurately monitor current even when the sensed node is at 28V while VCC is as low as 2.7V-enabling reliable operation during deep battery discharge or high-voltage DC bus monitoring. The device remains functional down to 0V common-mode, making it suitable for detecting near-zero battery voltages without loss of sensing capability.
Does the MAX4372TEUK-T require external gain-setting resistors?
No, the MAX4372TEUK-T does not require external gain-setting resistors. It integrates fixed 20V/V gain internally, eliminating the need for precision external resistors and associated layout sensitivity. This simplifies design, reduces component count, and improves temperature stability-since internal laser-trimmed resistors maintain gain accuracy across -40°C to +85°C without drift. The MAX4372TEUK-T's voltage output directly scales with sensed current, enabling direct connection to ADCs or comparators.
What is the supply current specification for the MAX4372TEUK-T?
The MAX4372TEUK-T draws only 30μA typical supply current (ICC) under normal operating conditions (VRS+ > 2V, VSENSE = 5mV). This ultra-low quiescent current is maintained across its full 2.7V to 28V supply range and over temperature (-40°C to +85°C), with a maximum of 60μA. This makes the MAX4372TEUK-T ideal for always-on battery monitoring circuits where minimizing standby power drain is essential-such as in smart-battery packs or portable medical devices.
Can the MAX4372TEUK-T be used with a 1.8V supply?
No, the MAX4372TEUK-T cannot operate reliably with a 1.8V supply. Its absolute minimum supply voltage is 2.7V, as specified in the Electrical Characteristics table. Attempting to power the MAX4372TEUK-T below 2.7V may result in undefined behavior, output saturation, or failure to meet accuracy specifications-including gain error, offset drift, and common-mode rejection degradation. For 1.8V-compatible current sensing, consider alternatives such as the MAX44284 or INA2x3 series, which are explicitly rated for lower supply rails.
What is the output impedance of the MAX4372TEUK-T, and why does it matter?
The MAX4372TEUK-T has a low 1.5Ω output impedance (ROUT), measured at full-scale output conditions. This low impedance allows the device to drive high-input-impedance loads-such as 12-bit+ SAR ADCs or op-amp buffers-without significant signal attenuation or settling delay. It eliminates the need for external output buffers in most applications, reducing bill-of-materials cost and PCB area. In practice, this means a 1MΩ ADC input sees less than 0.00015% loading error, preserving measurement fidelity in precision current-sense implementations.
MAX4372TEUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 275 kHz
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 30µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4372TEUK-T FAQ
1.How can I place an order for MAX4372TEUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372TEUK-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4372TEUK-T reliable?
The price and inventory of MAX4372TEUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372TEUK-T is usually 5 days.
3.What payment methods are accepted for MAX4372TEUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372TEUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372TEUK-T?
MAX4372TEUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372TEUK-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4372TEUK-T?
For technical support, including MAX4372TEUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372TEUK-T requirements.
6.How does Aetrix verify that MAX4372TEUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4372TEUK-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4372TEUK-T meets industry standards.
7.What is the process for return or replacement of MAX4372TEUK-T?
All MAX4372TEUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372TEUK-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4372TEUK-T part is unused and in its original packaging.
Return procedure for MAX4372TEUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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