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Analog Devices Inc./Maxim Integrated MAX4173TEUT
- Part No.:
- MAX4173TEUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4173TEUT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,004
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Product details
Overview
MAX4173TEUT from Maxim Integrated is a precision high-side current-sense amplifier in SOT23-6 package, delivering 20V/V fixed gain, ±0.5% full-scale accuracy, ±3mV input offset voltage, and 1.7MHz bandwidth. It operates from +3V to +28V supply, draws only 420µA quiescent current, and supports 0V to +28V input common-mode range independent of supply - enabling accurate battery discharge monitoring in notebook computers and smart chargers.
For engineers reviewing the MAX4173TEUT datasheet, MAX4173TEUT pinout, MAX4173TEUT application, or MAX4173TEUT equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional differences, and supply-chain support details specific to the MAX4173TEUT variant.
Technical Context
The MAX4173TEUT implements a high-impedance current-mirror-based sensing architecture that converts differential sense voltage (VRS+ – VRS−) into a proportional voltage output without external gain resistors. Its input common-mode range extends from 0V to +28V regardless of VCC, allowing operation during deep battery discharge while maintaining signal integrity.
It features internal resistor ratios defining its 20V/V gain, delivers 1.7MHz small-signal bandwidth at VSENSE = +100mV, and achieves ±0.5% total output voltage error over temperature and supply variations - critical for closed-loop battery charger control and PA bias regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - fixed internal ratio enables direct voltage output scaling without external resistors; sets full-scale output to 1V at 50mV sense voltage. |
| Full-Scale Accuracy | ±0.5% - guaranteed error across -40°C to +85°C ensures reliable current measurement in portable power systems. |
| Input Offset Voltage | ±3mV (max) - limits minimum detectable sense voltage to ~150µV at 20V/V gain, supporting low-current monitoring. |
| Bandwidth | 1.7MHz - sufficient for real-time response inside battery charger feedback loops and fast load transient detection. |
| Supply Current | 420µA - ultra-low quiescent draw preserves battery life in always-on monitoring applications like smart battery packs. |
| Common-Mode Range | 0V to +28V - independent of VCC; allows sensing on battery anode side even when battery voltage drops below system rail. |
| Operating Supply | +3V to +28V - single-supply compatibility simplifies integration in mixed-voltage embedded systems. |
Pinout & Package
SOT23-6 package with 1.6mm × 2.9mm footprint, RoHS-compliant, tape-and-reel delivery (T suffix). Thermal resistance θJA = 115°C/W; derating 8.7mW/°C above +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Low-side sense node | Connects to load-side terminal of external sense resistor; high-impedance input minimizes current error. |
| 2 (GND) | Analog ground reference | Return path for internal circuitry; must be tied to system ground near sense resistor for noise immunity. |
| 3 (RS+) | High-side sense node | Connects to power-source side of sense resistor; supports up to +28V common-mode voltage. |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; requires 0.1µF bypass capacitor to GND for stability and PSR optimization. |
| 5 (N.C.) | No connection | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling. |
| 6 (OUT) | Voltage output | Delivers gain × (VRS+ − VRS−); 12kΩ output impedance requires high-Z A/D or buffer stage. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 20V/V gain | Eliminates external gain-setting resistors, reducing BOM count and layout sensitivity in space-constrained SOT23 designs. |
| 0V to +28V common-mode range | Enables true high-side sensing on battery anodes down to 0V, avoiding ground-path disruption in charging circuits. |
| ±0.5% full-scale accuracy | Guarantees consistent current reporting across industrial temperature range without calibration in production systems. |
| 1.7MHz bandwidth | Supports dynamic current tracking in switching regulator control loops and fast fault detection in power management ICs. |
| 420µA supply current | Minimizes standby power loss in battery-backed systems where continuous monitoring is required. |
Applications
| Smart Battery Chargers | Notebook Computer Power Rails |
|---|---|
Use Scenario: Real-time charge/discharge current monitoring in lithium-ion battery packs with integrated fuel gauging. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog feedback to battery management MCU. Use Value: Enables precise coulomb counting and state-of-charge estimation without compromising battery ground integrity. |
Use Scenario: Monitoring CPU/GPU core rail current during dynamic load changes in ultrabook platforms. IC Role / Device Role / Timing Role: High-bandwidth current sensor feeding analog input of system power controller. Use Value: Supports adaptive thermal throttling and power budgeting with <1µs settling time for 1% accuracy. |
| PA Bias Control | Portable System Board-Level Monitoring |
Use Scenario: Setting and stabilizing RF power amplifier bias current in cellular handsets under varying supply conditions. IC Role / Device Role / Timing Role: Precision current monitor in closed-loop bias control loop with DC-DC converter. Use Value: Maintains linear PA operation across battery voltage sag (3.0V–4.2V), reducing EVM drift by >3dB. |
Use Scenario: Detecting abnormal current draw on USB-C PD input or display interface rails in tablets. IC Role / Device Role / Timing Role: Fault-detection sensor triggering system-level shutdown via microcontroller interrupt. Use Value: Provides 1.7MHz response to short-circuit events before thermal damage occurs in PCB traces. |
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, ±0.75% accuracy, 2.5MHz bandwidth, higher supply current (750µA). | Requires larger PCB area; better suited for industrial systems needing higher bandwidth and SO-8 thermal performance. | Select MAX4080TASA+ when board space permits SO-8 and >2MHz bandwidth is required for fast transient response. |
| INA210AIDCKR | 20V/V gain, SOT23-6 package, ±0.5% accuracy, 1.2MHz bandwidth, 100µA supply current, 26V max common-mode. | Lower quiescent current but reduced bandwidth; optimized for ultra-low-power IoT sensors rather than charger loops. | Select INA210AIDCKR when minimizing standby power is critical and 1.2MHz bandwidth suffices for system response. |
Compared with MAX4173TEUT, MAX4080TASA+ trades SOT23 size for higher speed and thermal margin, while INA210AIDCKR reduces supply current by 76% at the cost of 30% lower bandwidth - making MAX4173TEUT the optimal balance for battery charger control where 1.7MHz and 420µA are jointly required.
Availability
MAX4173TEUT is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and portable system board-level monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX4173TEUT 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 management, sensing, and communication applications.
The MAX4173 product line delivers cost-optimized, SOT23-packaged high-side current-sense amplifiers targeting battery-powered portable electronics requiring accurate, low-power, ground-independent current monitoring.
FAQ
What is the guaranteed full-scale accuracy of the MAX4173TEUT over temperature?
The MAX4173TEUT guarantees ±0.5% full-scale accuracy across the entire operating temperature range of -40°C to +85°C. This specification includes combined effects of gain error, offset voltage drift, and common-mode rejection degradation - ensuring repeatable current measurement without recalibration in field-deployed notebook and charger systems where the MAX4173TEUT is deployed.
Does the MAX4173TEUT require external gain-setting resistors?
No, the MAX4173TEUT does not require external gain-setting resistors. Its 20V/V gain is implemented using internal laser-trimmed resistor ratios and a precision current mirror, eliminating component count, layout sensitivity, and temperature drift associated with external networks. This fixed-gain architecture is integral to the MAX4173TEUT's compact SOT23-6 implementation and contributes directly to its ±0.5% accuracy guarantee.
Can the MAX4173TEUT operate with a battery voltage below the VCC supply?
Yes, the MAX4173TEUT can operate with VRS+ as low as 0V - including battery voltages below VCC - because its 0V to +28V input common-mode range is fully independent of the +3V to +28V VCC supply. This capability is explicitly validated in the MAX4173TEUT datasheet and enables reliable current sensing during deep battery discharge, a key requirement in smart battery pack applications where the MAX4173TEUT is commonly used.
What is the maximum recommended load capacitance on the MAX4173TEUT OUT pin?
The MAX4173TEUT is characterized with CLOAD = 5pF in all bandwidth and settling time specifications, including its 1.7MHz bandwidth and 400ns to 800ns 1% settling time. Driving capacitive loads beyond 5pF risks peaking, overshoot, or instability; if higher capacitance is unavoidable (e.g., long PCB traces), an external unity-gain buffer op amp with rail-to-rail input/output must be used - a design constraint confirmed in the MAX4173TEUT's output impedance and transient response data.
How does the MAX4173TEUT handle input overvoltage conditions on RS+ or RS−?
The MAX4173TEUT includes internal ESD protection diodes and is rated for differential input voltage up to ±0.3V and absolute maximum RS+/RS− voltages of -0.3V to +30V relative to GND. Exceeding these limits - such as applying >+30V on RS+ or reverse-biasing the sense resistor - may cause permanent damage. These absolute ratings are strictly enforced in the MAX4173TEUT's qualification testing and must be respected in layout and system protection design.
MAX4173TEUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.4 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-23-6
MAX4173TEUT FAQ
1.How can I place an order for MAX4173TEUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173TEUT 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 reliable?
The price and inventory of MAX4173TEUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173TEUT is usually 5 days.
3.What payment methods are accepted for MAX4173TEUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173TEUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173TEUT?
MAX4173TEUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173TEUT 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?
For technical support, including MAX4173TEUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173TEUT requirements.
6.How does Aetrix verify that MAX4173TEUT is sourced from the original manufacturer or authorized distributors?
All MAX4173TEUT 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 meets industry standards.
7.What is the process for return or replacement of MAX4173TEUT?
All MAX4173TEUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173TEUT, 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 part is unused and in its original packaging.
Return procedure for MAX4173TEUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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