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Analog Devices Inc./Maxim Integrated MAX4372TEBT+TG45
- Part No.:
- MAX4372TEBT+TG45
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-WFBGA, CSPBGA
- Datasheet:
-
MAX4372TEBT+TG45.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 5UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,675
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Product details
Overview
MAX4372TEBT+TG45 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+TG45 datasheet, MAX4372TEBT+TG45 pinout, MAX4372TEBT+TG45 application, or MAX4372TEBT+TG45 equivalent, this device is selected for ultra-low-power, space-constrained high-side sensing where ground-path integrity and deep-discharge compatibility are critical - especially in notebook computers, smart-battery chargers, and cellular power management.
Technical Context
The MAX4372TEBT+TG45 implements a current-mirror-based architecture with internal gain-setting resistors, delivering a voltage output proportional to sensed differential voltage across an external shunt. Its input stage maintains functional operation down to 0V common-mode while rejecting supply variations via 75–85dB PSR.
It features rail-to-rail output capability (VCC – 0.25V), 1.5Ω output impedance, and 275kHz –1dB bandwidth at 20V/V gain. The device achieves <20μs settling time to 1% and recovers from saturation in 0.1ms, supporting dynamic load-current tracking in real-time battery monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 2.0V for 100mV sense voltage, simplifying ADC interface without external gain resistors |
| Input Offset Voltage | ±1.3mV (max, –40°C to +85°C) - limits minimum detectable current error when using 5mΩ shunt at 1A load |
| Full-Scale Accuracy | ±0.18% (typ, +25°C) - enables sub-0.2% current measurement error in precision battery fuel gauging |
| Supply Current | 30μA (typ) - allows continuous monitoring in always-on battery backup circuits with negligible drain impact |
| Common-Mode Range | 0V to 28V, independent of VCC - ensures valid operation during 2-cell Li-ion deep discharge (<2.0V/cell) |
| Output Impedance | 1.5Ω - drives 10pF loads directly without buffering, reducing BOM count in compact PCB layouts |
| Bandwidth (–3dB) | 275kHz - supports fast transient detection in DC-DC converter output current limiting and overcurrent protection |
Pinout & Package
MAX4372TEBT+TG45 is housed in a lead(Pb)-free, RoHS-compliant 3 × 2 UCSP package (package code B6+2), measuring 1.0mm × 1.5mm with 0.5mm bump pitch and bottom-side solder bumps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RS+ | High-side sense input | Connects to battery/anode side of external shunt; tolerates up to +30V absolute max, enabling direct connection to 28V bus |
| RS− | Low-side sense input | Connects to load side of shunt; differential input accepts ±0.3V max swing, defining usable shunt voltage range |
| OUT | Voltage output | Delivers amplified VSENSE × 20; clamped to ≤12V, compatible with 3.3V/5V ADC references without level-shifting |
| VCC | Power supply | Single 2.7V–28V input; requires ≥0.1μF local decoupling to suppress switching noise coupling into sense path |
| GND | Analog ground reference | Provides return path for internal bias currents; must be tied to system power ground with low-impedance trace |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 30μA quiescent current enables >1-year runtime on coin-cell backup in smart-battery safety monitors |
| Zero-ground-interference sensing | High-side topology preserves charger ground path integrity - essential for USB-C PD and multi-port charging ICs |
| Deep-discharge compatibility | 0V common-mode operation allows accurate current readout even when battery voltage drops below 1.5V per cell |
| Integrated voltage-output architecture | Eliminates need for external op-amp and gain resistors, reducing layout area by >40% vs discrete solutions |
| UCSP footprint | 1.0mm × 1.5mm size fits within tight spacing constraints of smartphone PMIC modules and wearable battery packs |
Applications
| Notebook Battery Monitoring | Smart-Battery Charger Interface |
|---|---|
|
Use Scenario: Real-time discharge current tracking in ultrabook battery packs with dual-cell Li-ion configuration. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing analog voltage output proportional to load current for fuel-gauge MCU ADC sampling. Use Value: Enables accurate state-of-charge estimation down to 0.5V/cell, extending usable battery capacity by 8–12% versus conventional 2V lower-limit sensing. |
Use Scenario: Bidirectional current monitoring during CC/CV charge phases in USB-PD compliant smart-battery chargers. IC Role / Device Role / Timing Role: Precision high-side amplifier feeding charge controller's current feedback loop with <20μs response to step-load changes. Use Value: Supports ±1% charge current regulation across 0–28V input range, meeting JEITA temperature-compensated charging compliance. |
| Cell Phone Power Management | Portable Medical Device Battery Safety |
|
Use Scenario: In-system current profiling during RF transmission bursts in LTE/5G handsets to optimize power delivery. IC Role / Device Role / Timing Role: Fast-settling (20μs) current sensor feeding baseband processor for dynamic power budgeting and thermal throttling decisions. Use Value: Captures 100mA–2A peak current transients without clipping, enabling precise RF PA efficiency tuning and battery life prediction. |
Use Scenario: Continuous current supervision in Class II medical-grade portable infusion pumps with dual-battery redundancy. IC Role / Device Role / Timing Role: Fault-tolerant high-side monitor feeding watchdog circuitry that triggers shutdown on >150% overcurrent for IEC 60601-1 compliance. Use Value: Delivers <1.5ms total fault response (sense + comparator + latch), exceeding safety-critical timing requirements for battery-isolated systems. |
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+ | 20V/V gain, SO-8 package (5mm × 4mm), 125μA supply current, 120kHz bandwidth | Larger footprint and higher quiescent current limit use in space-constrained, ultra-low-power designs | Select MAX4080TASA+ only if SO-8 assembly infrastructure exists and 95μA extra supply current is acceptable |
| INA213AIDCKR | 20V/V gain, SC70-6 package (2.0mm × 1.25mm), 100μA supply current, 0.5V/V offset drift over temp | Higher offset drift degrades accuracy below 0°C; SC70 larger than UCSP and lacks 0V common-mode support | Choose INA213AIDCKR only for non-deep-discharge applications where ambient temperature stays >0°C |
Compared with MAX4372TEBT+TG45, MAX4080TASA+ trades 4× higher supply current and 2.3× larger area for SO-8 manufacturability, while INA213AIDCKR sacrifices 0V common-mode operation and adds ±0.5mV/°C offset drift - making MAX4372TEBT+TG45 uniquely suited for deep-discharge, micropower, and ultra-compact battery monitoring.
Availability
MAX4372TEBT+TG45 is available at Aetrix Electronics and suitable for notebook computers, smart-battery chargers, and portable medical devices requiring stable component supply across extended product lifecycles.
Supply support for MAX4372TEBT+TG45 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 space- and power-constrained high-side current sensing in battery-powered systems, emphasizing zero-ground-interference operation and deep-discharge compatibility.
FAQ
What is the exact package type and dimensions of MAX4372TEBT+TG45?
MAX4372TEBT+TG45 uses a 3 × 2 UCSP (wafer-level chip-scale) package with dimensions of 1.0mm × 1.5mm and 0.5mm bump pitch. It is RoHS-compliant and marked "ACX" on top. This package is distinct from the SOT23-5 variant (MAX4372TEUK+T) and offers the smallest footprint in the MAX4372 family, optimized for ultra-dense portable PCBs.
Does MAX4372TEBT+TG45 support true 0V common-mode operation, and how is that verified?
Yes, MAX4372TEBT+TG45 supports functional operation down to 0V common-mode input voltage, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. The datasheet explicitly states "High Accuracy +2V to +28V Common-Mode Range, Functional Down to 0V, Independent of Supply Voltage", and test data (Figure MAX4372T toc07) shows <1.6% output error at 0V common-mode.
What is the maximum allowable sense resistor voltage (VSENSE) for MAX4372TEBT+TG45, and why?
The maximum full-scale sense voltage for MAX4372TEBT+TG45 is 150mV, as specified under "Full-Scale Sense Voltage" in the Electrical Characteristics table for 20V/V and 50V/V versions. This limit arises from internal output clamping (not to exceed 12V) and gain linearity constraints - exceeding 150mV risks saturation and increased total output error beyond ±7%.
How does the 30μA supply current of MAX4372TEBT+TG45 impact battery runtime in always-on monitoring?
At 30μA, MAX4372TEBT+TG45 draws just 0.72mAh per day. In a typical 500mAh smart-battery pack, this extends continuous monitoring runtime by over 1.5 years before contributing 1% capacity loss - making it viable for firmware-based fuel gauging and safety logging without compromising standby life.
Can MAX4372TEBT+TG45 be used with a PC board copper trace as the sense resistor, and what are the key limitations?
Yes, the datasheet explicitly supports using a PCB copper trace as RSENSE (Figure 2). Key limitations include copper's ~0.4%/°C temperature coefficient - requiring software compensation in wide-temperature environments - and self-heating-induced nonlinearity. For MAX4372TEBT+TG45 with 20V/V gain, a 5mΩ trace (e.g., 2-inch, 0.1-inch-wide, 2oz copper) yields 1V full-scale output at 10A, but power dissipation must stay below the trace's thermal rating.
MAX4372TEBT+TG45 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-WFBGA, CSPBGA
- 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:
- 5-UCSP (1x1.52)
MAX4372TEBT+TG45 FAQ
1.How can I place an order for MAX4372TEBT+TG45 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372TEBT+TG45 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 MAX4372TEBT+TG45 reliable?
The price and inventory of MAX4372TEBT+TG45 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372TEBT+TG45 is usually 5 days.
3.What payment methods are accepted for MAX4372TEBT+TG45?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372TEBT+TG45 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372TEBT+TG45?
MAX4372TEBT+TG45 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372TEBT+TG45 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 MAX4372TEBT+TG45?
For technical support, including MAX4372TEBT+TG45 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372TEBT+TG45 requirements.
6.How does Aetrix verify that MAX4372TEBT+TG45 is sourced from the original manufacturer or authorized distributors?
All MAX4372TEBT+TG45 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 MAX4372TEBT+TG45 meets industry standards.
7.What is the process for return or replacement of MAX4372TEBT+TG45?
All MAX4372TEBT+TG45 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372TEBT+TG45, 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 MAX4372TEBT+TG45 part is unused and in its original packaging.
Return procedure for MAX4372TEBT+TG45:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4372TEBT+TG45 Tags
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