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Analog Devices Inc./Maxim Integrated MAX4372HEUK-TG05
- Part No.:
- MAX4372HEUK-TG05
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4372HEUK-TG05.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,811
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Product details
Overview
MAX4372HEUK-TG05 from Maxim Integrated is a precision high-side current-sense amplifier in a 5-pin SOT23 package, featuring 100V/V fixed gain, 0.18% full-scale accuracy, 0.3mV input offset voltage, and operation from 2.7V to 28V supply. It delivers voltage output for battery current monitoring in notebook computers, smart-battery chargers, and portable systems where ground-path integrity is critical.
For engineers reviewing the MAX4372HEUK-TG05 datasheet, MAX4372HEUK-TG05 pinout, MAX4372HEUK-TG05 application, or MAX4372HEUK-TG05 equivalent, this device supports high-accuracy, micropower (30μA) current sensing with 0–28V common-mode range independent of supply voltage-key for deep-discharge battery monitoring and compact DC power management designs.
Technical Context
The MAX4372HEUK-TG05 implements a high-side sensing architecture using an internal current-mirror-based amplifier topology that rejects common-mode voltages up to 28V regardless of VCC level. Its gain is fixed at 100V/V, eliminating external gain-setting components and reducing layout sensitivity.
It features rail-to-rail output capability with 1.5Ω output impedance and maintains functional operation down to 0V common-mode input-enabling reliable current measurement even during 2-cell Li-ion battery deep discharge. The device achieves ±0.18% full-scale accuracy at +25°C and exhibits 110kHz −3dB bandwidth under 100mV sense input with 10pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - fixed internal gain enables direct voltage output proportional to sense resistor voltage without external resistors. |
| Full-Scale Accuracy | ±0.18% at +25°C - ensures precise current measurement over temperature and supply variations in battery fuel gauging. |
| Input Offset Voltage | 0.3mV (typ), ±1.9mV (max, −40°C to +85°C) - low offset minimizes error at low sense voltages (e.g., 6.25mV C/16). |
| Supply Current | 30μA (typ) - ultra-low quiescent current extends battery life in always-on monitoring circuits. |
| Common-Mode Input Range | 0V to 28V, independent of VCC - allows sensing across fully discharged batteries and high-voltage rails without ground disruption. |
| −3dB Bandwidth | 110kHz (gain = 100V/V, CL = 10pF) - supports fast transient current detection in dynamic load applications like USB-C PD negotiation. |
| Output Impedance | 1.5Ω - drives 1MΩ ADC inputs directly while maintaining stability with ≤1000pF capacitive loads. |
Pinout & Package
MAX4372HEUK-TG05 is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+1, outline 21-0057), optimized for space-constrained portable electronics.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and output stage; must be connected to system ground with low-impedance path. |
| 2 | OUT | Voltage output proportional to (VRS+ − VRS−) × 100; drives ADC or comparator with 1.5Ω source impedance. |
| 3 | VCC | Power supply input (2.7V–28V); requires ≥0.1μF ceramic decoupling capacitor placed near pin. |
| 4 | RS+ | High-side connection to external 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+; no internal connection to GND or VCC. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 100V/V gain | Eliminates gain-setting resistors and associated layout sensitivity-reduces BOM count and PCB area in portable designs. |
| 0.18% full-scale accuracy | Enables high-fidelity battery charge/discharge tracking with <±1% current error over temperature in smart-battery packs. |
| 30μA supply current | Supports continuous current monitoring in low-power sleep modes without compromising battery runtime. |
| 0–28V common-mode range | Permits accurate sensing from fully depleted (0V) to fully charged (28V) battery stacks without ground loop interference. |
| 1.5Ω output impedance | Allows direct interface to 12-bit+ SAR ADCs without buffer amplifiers-reducing component count and signal chain noise. |
Applications
| Smart-Battery Chargers | Notebook Computers |
|---|---|
Use Scenario: Real-time charging current monitoring in Li-ion battery packs with integrated fuel gauges. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated, ground-referenced voltage output proportional to charge/discharge current. Use Value: Enables precise coulomb counting and state-of-charge estimation without disrupting charger ground return path. |
Use Scenario: System-level power rail current monitoring for CPU/GPU thermal throttling and battery health diagnostics. IC Role / Device Role / Timing Role: Micropower current sensor on main 3.3V/5V/12V rails delivering analog feedback to PMIC or EC. Use Value: Delivers 110kHz bandwidth and 0.18% accuracy for dynamic load profiling during performance mode transitions. |
| Portable Medical Devices | USB-C Power Delivery Systems |
Use Scenario: Battery discharge current supervision in handheld diagnostic tools requiring FDA-grade accuracy and low power. IC Role / Device Role / Timing Role: Precision high-side monitor interfacing directly to low-noise 16-bit ADC for data logging. Use Value: 30μA quiescent current and 0.3mV offset enable sub-1mA current resolution over full battery voltage range. |
Use Scenario: Source-side current sensing in USB-C PD sink adapters to enforce power contract limits and prevent overcurrent faults. IC Role / Device Role / Timing Role: Fast-response (20µs settling) current amplifier feeding protection logic or digital controller. Use Value: 110kHz bandwidth and saturation recovery time of 0.1ms support real-time compliance with USB PD 3.1 fast role swap timing. |
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, higher PSR (90dB), 125kHz bandwidth | Better noise immunity in noisy industrial environments; larger footprint limits portable use | Select when higher PSR and SO-8 handling are prioritized over size and micropower operation |
| INA219AIDR | I²C digital output, integrated 12-bit ADC, 0.1% gain error, 260kHz bandwidth | Eliminates external ADC but adds firmware dependency and I²C bus overhead | Select when digital integration, calibration flexibility, and multi-channel monitoring outweigh analog simplicity |
Compared with MAX4372HEUK-TG05, MAX4080TASA+ offers superior power-supply rejection but requires more board area and consumes 100μA, while INA219AIDR provides digital convenience at the cost of added software complexity and reduced analog bandwidth efficiency.
Availability
MAX4372HEUK-TG05 is available at Aetrix Electronics and suitable for notebook computers, smart-battery chargers, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4372HEUK-TG05 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-accuracy, micropower, high-side current sensing in battery-powered systems-emphasizing ground-path preservation, wide common-mode range, and minimal external components.
FAQ
What is the gain configuration of MAX4372HEUK-TG05?
The MAX4372HEUK-TG05 has a fixed internal gain of 100V/V, denoted by the "H" suffix in the part number. This eliminates the need for external gain-setting resistors and ensures consistent scaling of the output voltage (VOUT = 100 × VSENSE) across all units. The gain is trimmed at wafer test and contributes to the device's ±0.18% full-scale accuracy specification at +25°C.
Does MAX4372HEUK-TG05 support operation with a fully discharged battery?
Yes, MAX4372HEUK-TG05 supports common-mode input voltages from 0V to 28V, independent of its supply voltage (2.7V to 28V). This means it remains fully functional even when the battery voltage drops to 0V-critical for accurate end-of-discharge monitoring in 2-cell Li-ion packs. The input stage operates correctly down to 0V common-mode, verified per the "Common-Mode Input Range" specification in the datasheet.
What is the maximum recommended capacitive load for MAX4372HEUK-TG05 output?
The MAX4372HEUK-TG05 is stable with capacitive loads up to 1000pF, as confirmed by the "Capacitive-Load Stability" specification. For loads exceeding 100pF, a series resistor (typically 10–50Ω) between OUT and the ADC input is recommended to maintain phase margin. The 1.5Ω output impedance allows direct driving of high-impedance inputs, but large capacitances may degrade transient response or cause ringing if not properly damped.
Can MAX4372HEUK-TG05 be used with a 1.8V supply?
No, MAX4372HEUK-TG05 requires a minimum supply voltage of 2.7V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V is not guaranteed and may result in degraded accuracy, increased offset, or failure to meet the 0.18% full-scale accuracy spec. For 1.8V systems, consider the MAX4008 or other low-voltage current-sense alternatives.
How does the 30μA supply current of MAX4372HEUK-TG05 impact battery runtime?
The 30μA typical supply current of MAX4372HEUK-TG05 enables continuous current monitoring with negligible impact on battery life-for example, drawing only ~0.72mAh per day. In a 2000mAh Li-ion battery, this represents just 0.036% daily drain, making MAX4372HEUK-TG05 ideal for always-on fuel gauging and health monitoring in portable equipment where runtime is critical.
MAX4372HEUK-TG05 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:
- 110 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
MAX4372HEUK-TG05 FAQ
1.How can I place an order for MAX4372HEUK-TG05 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4372HEUK-TG05 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 MAX4372HEUK-TG05 reliable?
The price and inventory of MAX4372HEUK-TG05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4372HEUK-TG05 is usually 5 days.
3.What payment methods are accepted for MAX4372HEUK-TG05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4372HEUK-TG05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4372HEUK-TG05?
MAX4372HEUK-TG05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4372HEUK-TG05 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 MAX4372HEUK-TG05?
For technical support, including MAX4372HEUK-TG05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4372HEUK-TG05 requirements.
6.How does Aetrix verify that MAX4372HEUK-TG05 is sourced from the original manufacturer or authorized distributors?
All MAX4372HEUK-TG05 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 MAX4372HEUK-TG05 meets industry standards.
7.What is the process for return or replacement of MAX4372HEUK-TG05?
All MAX4372HEUK-TG05 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4372HEUK-TG05, 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 MAX4372HEUK-TG05 part is unused and in its original packaging.
Return procedure for MAX4372HEUK-TG05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4372HEUK-TG05 Tags
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