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Analog Devices Inc./Maxim Integrated MAX4173TEUT+TC4X
- Part No.:
- MAX4173TEUT+TC4X
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4173TEUT+TC4X.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:1,027
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Product details
Overview
The MAX4173TEUT+TC4X from Maxim Integrated is a precision high-side current-sense amplifier in SOT23-6 package, featuring 20V/V fixed gain, ±0.5% full-scale accuracy, 1.7MHz bandwidth, and 0V to +28V input common-mode range independent of supply voltage. It delivers voltage output without external gain-setting resistors and is designed for battery-charger control loops and notebook power monitoring.
For engineers reviewing the MAX4173TEUT+TC4X datasheet, MAX4173TEUT+TC4X pinout, MAX4173TEUT+TC4X application, or MAX4173TEUT+TC4X equivalent, key selection criteria include high-side sensing capability at deep-discharge battery voltages, low 420µA quiescent current, ±3mV input offset voltage, and compatibility with single +3V to +28V supply across –40°C to +85°C.
Technical Context
The MAX4173TEUT+TC4X implements a high-impedance current-mirror-based architecture that converts differential sense voltage (VRS+ – VRS−) into a proportional voltage output without requiring external feedback components. Its input stage operates with rail-to-rail common-mode range down to 0V, enabling accurate current measurement even when battery voltage drops below the supply rail.
It uses internal resistor ratios and current mirroring to achieve fixed 20V/V gain, with total output voltage error bounded by ±0.5% full-scale over temperature and supply variations. The 1.7MHz bandwidth supports dynamic response inside battery charger feedback loops, while 12kΩ output impedance requires high-impedance A/D or buffered interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets output voltage = 20 × (VRS+ − VRS−), enabling direct interfacing with 1V full-scale ADCs using 50mV sense drop |
| Full-Scale Accuracy | ±0.5% - guarantees ≤5mV error at 1V output, critical for precise battery charge termination |
| Input Common-Mode Range | 0V to +28V - allows monitoring load current during battery deep discharge (<1V) without ground path disruption |
| Bandwidth | 1.7MHz - supports fast transient detection in switching charger control loops with <800ns settling time |
| Supply Current | 420µA - enables always-on current monitoring in portable systems with minimal battery drain |
| Input Offset Voltage | ±3mV - limits minimum resolvable sense voltage to ~150µV at 20V/V gain, suitable for ≥10mA current resolution with 5mΩ shunt |
| Operating Supply | +3V to +28V - powers directly from system rail or dedicated bias, eliminating need for auxiliary LDO |
Pinout & Package
MAX4173TEUT+TC4X is housed in a RoHS-compliant, lead(Pb)-free SOT23-6 package (package code U6+2, outline 21-0058), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Current-sense resistor low-side terminal | Connects to load side of external shunt; referenced to GND but not tied to system ground-enables true high-side sensing |
| 2 (GND) | Analog ground reference | Return path for internal circuitry; must be connected to clean analog ground separate from power ground if noise-sensitive |
| 3 (RS+) | Current-sense resistor high-side terminal | Connects to power source side of shunt; accepts up to +28V common-mode voltage regardless of VCC |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF ceramic bypass capacitor to GND for stability |
| 5 (N.C.) | No internal connection | Unbonded die pad; must remain floating or grounded per layout guidelines-no signal routing |
| 6 (OUT) | Voltage output terminal | Delivers 20×(VRS+−VRS−) with 12kΩ output impedance; drives high-Z ADC inputs directly |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20V/V gain | Eliminates external gain resistors and associated layout sensitivity, reducing BOM count and board area in space-constrained notebooks |
| 0V to +28V common-mode range | Enables uninterrupted current monitoring during battery voltage collapse to 0V, preserving charger loop integrity in deep-discharge recovery |
| 1.7MHz bandwidth | Supports real-time response to fast load transients in Li-ion charger IC feedback paths without phase lag-induced instability |
| ±0.5% full-scale accuracy | Meets tight current-sensing requirements for smart battery fuel gauging and overcurrent protection thresholds |
| 420µA supply current | Allows continuous current logging in always-on subsystems (e.g., battery status monitors) with sub-1µA/h average drain over 10-year life |
Applications
| Notebook Power Monitoring | Battery Charger Control Loop |
|---|---|
Use Scenario: Real-time monitoring of CPU/GPU rail current during dynamic load changes in ultrabooks. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog feedback to system power controller. Use Value: Enables adaptive power capping and thermal throttling without compromising ground integrity or introducing shunt-induced noise on digital ground planes. | Use Scenario: Closed-loop current regulation in switch-mode Li-ion battery chargers operating from 3.3V–24V input rails. IC Role / Device Role / Timing Role: Precision current-sense front-end feeding error amplifier in charger IC feedback path. Use Value: 1.7MHz bandwidth ensures stable loop response during CC/CV transition; 0V–28V common-mode range maintains accuracy during battery recovery from 0.5V. |
| Smart Battery Pack Management | PA Bias Current Control |
Use Scenario: Coulomb counting and overcurrent protection in multi-cell battery packs used in medical handhelds. IC Role / Device Role / Timing Role: High-side sense element interfaced to fuel gauge MCU via precision ADC. Use Value: ±0.5% full-scale accuracy enables <1% state-of-charge error over full temperature range; low 420µA ICC extends pack standby life. | Use Scenario: Dynamic bias current adjustment for RF power amplifiers in 4G/5G mobile hotspots. IC Role / Device Role / Timing Role: High-speed current monitor feeding DAC-controlled bias loop. Use Value: 800ns 1% settling time supports rapid PA enable/disable sequencing; 20V/V gain matches typical 100mV full-scale ADC inputs. |
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+ | Same 20V/V gain, wider 4.5V–76V supply range, higher 1.5mA ICC, SO-8 package | Better suited for industrial 24V/48V systems; less optimal for ultra-low-power portable designs | Select MAX4080TASA+ only when >28V supply or enhanced ESD robustness (±8kV HBM) is required |
| INA213AIDCKR | 20V/V gain, ±0.3% initial gain error, 1.2MHz bandwidth, 650µA ICC, same SOT23-6 footprint | Lower offset drift (±0.5µV/°C vs. ±2µV/°C), tighter gain tolerance, but reduced bandwidth limits charger loop use | Choose INA213AIDCKR where ultimate DC accuracy dominates over dynamic response-e.g., precision battery gauging over long-term integration |
Compared with MAX4173TEUT+TC4X, MAX4080TASA+ trades ultra-low quiescent current for extended voltage range and ruggedness, while INA213AIDCKR improves static accuracy at the cost of bandwidth-making MAX4173TEUT+TC4X optimal for cost-sensitive, battery-powered systems needing fast, reliable high-side sensing within 3V–28V.
Availability
MAX4173TEUT+TC4X is available at Aetrix Electronics and suitable for notebook computers, portable/battery-powered systems, and smart battery pack chargers requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for MAX4173TEUT+TC4X 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 in portable, industrial, and automotive markets.
The MAX4173TEUT+TC4X belongs to Maxim's high-side current-sense amplifier product line, engineered specifically for compact, low-power battery management and charger control where ground-path integrity and deep-discharge operation are mandatory.
FAQ
What is the maximum common-mode voltage supported by the MAX4173TEUT+TC4X?
The MAX4173TEUT+TC4X supports an input common-mode voltage range of 0V to +28V, independent of its supply voltage. This means it can accurately sense current even when the RS+ node is at 0V (e.g., deeply discharged battery) or up to +28V, while VCC may be as low as +3V. This capability is verified across the full –40°C to +85°C temperature range and is guaranteed by the Total Output Voltage Error test-not extrapolated or conditional.
Does the MAX4173TEUT+TC4X require external gain-setting resistors?
No, the MAX4173TEUT+TC4X does not require external gain-setting resistors. It integrates a fixed 20V/V gain architecture using internal resistor ratios and a precision current mirror. This eliminates component count, layout sensitivity, and gain drift associated with external resistors-delivering consistent 20×(VRS+ − VRS−) output directly from the OUT pin, as confirmed in the Functional Diagram and Electrical Characteristics table.
What is the supply current consumption of the MAX4173TEUT+TC4X over temperature?
The MAX4173TEUT+TC4X draws 420µA typical supply current across –40°C to +85°C, with a maximum of 1.0mA per the Electrical Characteristics table. Graph TOC02 confirms stable current draw between 400µA and 440µA over this range for the T-grade version. This ultra-low quiescent current enables always-on current monitoring in battery-critical applications without significant runtime impact.
Can the MAX4173TEUT+TC4X be used with a single 3.3V supply?
Yes, the MAX4173TEUT+TC4X operates from a single +3V to +28V supply, fully specified down to +3V. At VCC = +3.3V, it maintains 20V/V gain, ±0.5% full-scale accuracy, and functional 0V–28V common-mode range. The Absolute Maximum Ratings confirm VCC ≥ –0.3V, and PSR testing guarantees operation at minimum 3V-making it compatible with standard 3.3V logic rails in portable systems.
What is the output impedance of the MAX4173TEUT+TC4X and how does it affect interfacing?
The MAX4173TEUT+TC4X has a nominal output impedance of 12kΩ, as measured in the Electrical Characteristics table under "OUT Output Resistance". This current-source-like output requires connection to a high-impedance input (e.g., SAR ADC with ≥1MΩ input resistance) to avoid gain error. Loading with ≤10kΩ introduces >5% error; buffering with a rail-to-rail op amp is recommended if driving lower-impedance loads or long traces.
MAX4173TEUT+TC4X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.7 MHz
- Current - Input Bias:
- 100 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 420µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 28 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4173TEUT+TC4X FAQ
1.How can I place an order for MAX4173TEUT+TC4X through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173TEUT+TC4X 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 MAX4173TEUT+TC4X reliable?
The price and inventory of MAX4173TEUT+TC4X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173TEUT+TC4X is usually 5 days.
3.What payment methods are accepted for MAX4173TEUT+TC4X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173TEUT+TC4X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173TEUT+TC4X?
MAX4173TEUT+TC4X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173TEUT+TC4X 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 MAX4173TEUT+TC4X?
For technical support, including MAX4173TEUT+TC4X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173TEUT+TC4X requirements.
6.How does Aetrix verify that MAX4173TEUT+TC4X is sourced from the original manufacturer or authorized distributors?
All MAX4173TEUT+TC4X 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 MAX4173TEUT+TC4X meets industry standards.
7.What is the process for return or replacement of MAX4173TEUT+TC4X?
All MAX4173TEUT+TC4X units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173TEUT+TC4X, 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 MAX4173TEUT+TC4X part is unused and in its original packaging.
Return procedure for MAX4173TEUT+TC4X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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