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Analog Devices Inc./Maxim Integrated MAX4173FEUT-T
- Part No.:
- MAX4173FEUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4173FEUT-T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,589
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Product details
Overview
MAX4173FEUT-T from Maxim Integrated is a precision high-side current-sense amplifier in SOT23-6 package, delivering 50V/V fixed gain, ±0.5% full-scale accuracy, 1.4MHz bandwidth, and 0V to +28V input common-mode range independent of supply voltage. It enables accurate battery current monitoring in notebook computers, smart battery chargers, and portable power-management systems without disrupting ground paths.
For engineers reviewing the MAX4173FEUT-T datasheet, MAX4173FEUT-T pinout, MAX4173FEUT-T application, or MAX4173FEUT-T equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the MAX4173FEUT-T variant.
Technical Context
The MAX4173FEUT-T implements a high-impedance current-mirror-based architecture with internal gain-setting resistors, eliminating external gain components. Its input stage operates with zero dependence on VCC for common-mode range - enabling valid sensing even when VRS+ = 0V (deep battery discharge) while powered from as low as +3V.
It delivers voltage output directly proportional to sensed differential voltage (VRS+ − VRS−), with 12kΩ output impedance and no phase reversal under overdrive. The device achieves stable operation across −40°C to +85°C with only 420µA supply current, making it suitable for integration into closed-loop battery charger control circuits requiring fast transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets output voltage = 50 × (VRS+ − VRS−); enables 100mV full-scale sense voltage to produce 5V output for direct ADC interfacing. |
| Full-Scale Accuracy | ±0.5% - ensures ≤5mV error at 1V output; critical for precise battery charge/discharge state estimation. |
| Common-Mode Range | 0V to +28V - remains functional during battery deep discharge (0V) and supports up to 28V bus monitoring without level-shifting. |
| Bandwidth | 1.4MHz - supports dynamic current measurement in switching regulator feedback loops and fast-charging applications. |
| Supply Current | 420µA - enables always-on current monitoring in ultra-low-power portable systems without significant battery drain. |
| Input Offset Voltage | ±3mV (typ) - limits minimum resolvable sense voltage to ~60µV at 50× gain; defines lowest detectable load current with RSENSE. |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive cabin-temperature embedded power monitoring. |
Pinout & Package
SOT23-6 package with 1.6mm × 2.9mm footprint, RoHS-compliant, tape-and-reel delivery. Pin 1 marked by dot; top-mark "AABO" confirms MAX4173F variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RS−) | Low-side sense resistor terminal | Connects to load side of external sense resistor; forms differential input with RS+; must remain within ±0.3V of RS+. |
| 2 (GND) | Analog ground reference | Return path for internal circuitry; separate from power ground to preserve high-side sensing integrity. |
| 3 (RS+) | High-side sense resistor terminal | Connects to power source side of sense resistor; accepts 0V–28V common-mode voltage regardless of VCC. |
| 4 (VCC) | Positive supply input | Accepts +3V to +28V; powers internal amplifier and current mirror; bypass required with 0.1µF capacitor to GND. |
| 5 (N.C.) | No internal connection | Not bonded; must be left floating or tied to GND per layout best practice - no electrical function. |
| 6 (OUT) | Voltage output terminal | Delivers 50×(VRS+ − VRS−); 12kΩ output impedance requires high-Z load or buffer op-amp for minimal gain error. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 50V/V gain | Eliminates external gain resistors and associated layout sensitivity; reduces BOM count and PCB area vs. adjustable amplifiers. |
| 0V to +28V common-mode range | Enables uninterrupted current monitoring during battery voltage collapse to 0V - essential for fuel-gauge accuracy in Li-ion systems. |
| 1.4MHz bandwidth | Supports real-time current tracking in 500kHz+ switching regulators; settles to 1% in 800ns for step changes in load current. |
| 420µA quiescent current | Permits continuous current logging in battery-backed systems with multi-week runtime on coin-cell backup. |
| ±0.5% full-scale accuracy | Meets Class 0.5 current measurement requirement for smart battery pack certification (e.g., SMBus compliant packs). |
Applications
| Notebook Battery Monitoring | Smart Charger Feedback Loop |
|---|---|
Use Scenario: Real-time battery discharge/charge current measurement in ultrabook platforms with dual-cell Li-ion batteries. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog voltage output proportional to battery terminal current. Use Value: Enables precise coulomb counting and state-of-charge estimation without compromising battery ground integrity or adding shunt-ground interference. | Use Scenario: Closed-loop current regulation in USB-C PD 3.0 programmable chargers delivering up to 100W. IC Role / Device Role / Timing Role: High-bandwidth current feedback element in constant-current control loop of synchronous buck converter. Use Value: 1.4MHz bandwidth allows stable loop compensation at >200kHz switching frequencies; 420µA ICC minimizes standby power loss. |
| PA Bias Control | Board-Level Power Rail Monitoring |
Use Scenario: Dynamic bias current adjustment for RF power amplifiers in 4G/LTE mobile handsets. IC Role / Device Role / Timing Role: High-side monitor measuring PA supply current to enable adaptive biasing and thermal derating. Use Value: 0V–28V common-mode range accommodates varying PA supply voltages (3.3V–24V); ±0.5% accuracy ensures consistent linearity across temperature. | Use Scenario: System-level rail current supervision in industrial IoT gateways with multiple isolated DC-DC outputs. IC Role / Device Role / Timing Role: Dedicated current sensor per power domain feeding microcontroller ADC for fault detection and energy accounting. Use Value: SOT23-6 footprint enables placement adjacent to each rail's sense resistor; low ICC allows simultaneous monitoring of 4+ rails without supply overhead. |
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 |
|---|---|---|---|
| INA213AIDCKR | 200V/V gain, 1.2MHz bandwidth, ±0.3% gain error, 650µA ICC, same SOT23-6 package | Higher gain suits lower-current sensing (e.g., <1A); wider bandwidth supports faster transients but higher supply current reduces battery life | Select when full-scale sense voltage must be ≤25mV and system can tolerate +230µA extra quiescent draw. |
| MAX4080TASA+ | 20V/V gain, 2.5MHz bandwidth, ±0.5% gain error, 700µA ICC, SO-8 package | Lower gain requires larger RSENSE for same output swing; SO-8 footprint increases board area but improves thermal performance at high power | Select when higher bandwidth is prioritized over size/power and PCB space allows SO-8 mounting. |
Compared with MAX4173FEUT-T, INA213AIDCKR offers higher gain and slightly better accuracy but consumes more supply current, while MAX4080TASA+ trades gain reduction for greater bandwidth and uses a larger package - both require layout revision and recalibration of sense resistor values.
Availability
MAX4173FEUT-T is available at Aetrix Electronics and suitable for notebook computers, smart battery chargers, and portable power-management systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX4173FEUT-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, designs precision analog, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX4173 product line delivers cost-optimized, space-constrained high-side current sensing for battery-powered systems where ground-path integrity and wide common-mode operation are mandatory design requirements.
FAQ
What is the guaranteed common-mode input range for MAX4173FEUT-T?
The MAX4173FEUT-T guarantees a 0V to +28V input common-mode range independent of supply voltage, verified across −40°C to +85°C. This means the device remains fully functional even when VRS+ drops to 0V during deep battery discharge, while VCC is powered from as low as +3V - a key differentiator for battery-fuel-gauge accuracy in portable systems.
Does MAX4173FEUT-T require external gain-setting resistors?
No, the MAX4173FEUT-T integrates internal gain-setting resistors to deliver a fixed 50V/V gain. This eliminates external components, reduces PCB area, avoids resistor tolerance errors, and simplifies layout - unlike programmable current-sense amplifiers that rely on external feedback networks for gain configuration.
What is the output impedance of MAX4173FEUT-T and how does it affect system design?
The MAX4173FEUT-T has a nominal output impedance of 12kΩ. Loading OUT with resistance below ~120kΩ introduces measurable gain error; for example, a 100kΩ load causes ~11% error. Designers must connect MAX4173FEUT-T to high-impedance inputs (e.g., SAR ADCs or op-amp buffers) or add a unity-gain follower to preserve measurement accuracy.
Can MAX4173FEUT-T operate with a 2.5V supply voltage?
No, the MAX4173FEUT-T requires a minimum supply voltage of +3V as specified in its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below +3V is not characterized or guaranteed - attempting 2.5V may result in undefined behavior, reduced common-mode range, or failure to meet ±0.5% accuracy specifications.
How does the MAX4173FEUT-T handle overvoltage on the RS+ and RS− pins?
The MAX4173FEUT-T tolerates differential input voltages up to ±0.3V between RS+ and RS−, and absolute voltages from −0.3V to +30V on RS+, RS−, and VCC relative to GND. Exceeding these limits risks permanent damage; external clamping (e.g., TVS diodes) is recommended in noisy or hot-swap environments where transient overvoltage may occur.
MAX4173FEUT-T 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:
- 1.4 MHz
- Current - Input Bias:
- 700 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
MAX4173FEUT-T FAQ
1.How can I place an order for MAX4173FEUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4173FEUT-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 MAX4173FEUT-T reliable?
The price and inventory of MAX4173FEUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4173FEUT-T is usually 5 days.
3.What payment methods are accepted for MAX4173FEUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4173FEUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4173FEUT-T?
MAX4173FEUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4173FEUT-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 MAX4173FEUT-T?
For technical support, including MAX4173FEUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4173FEUT-T requirements.
6.How does Aetrix verify that MAX4173FEUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4173FEUT-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 MAX4173FEUT-T meets industry standards.
7.What is the process for return or replacement of MAX4173FEUT-T?
All MAX4173FEUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4173FEUT-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 MAX4173FEUT-T part is unused and in its original packaging.
Return procedure for MAX4173FEUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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