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Analog Devices Inc./Maxim Integrated MAX17260BEWL+T
- Part No.:
- MAX17260BEWL+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 9-WFBGA, WLBGA
- Datasheet:
-
MAX17260BEWL+T.pdf
- Description:
- IC BATT MON LI-ION 1CELL 9WLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,901
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Product details
Overview
MAX17260BEWL+T from Analog Devices is an ultra-low-power, single-cell Li+-based fuel gauge IC implementing the ModelGauge™ m5 EZ algorithm. It performs precision voltage (±20mV), current (±1% reading), and temperature (±1°C) measurements, supports both high-side and low-side current sensing with 1mΩ–1000mΩ sense resistors, and delivers accurate state-of-charge (%), remaining capacity (mAh), time-to-empty/full, and battery aging metrics - deployed in wearables, smartwatches, and medical devices.
For engineers reviewing the MAX17260BEWL+T datasheet, MAX17260BEWL+T pinout, MAX17260BEWL+T application, or MAX17260BEWL+T equivalent, this page provides verified technical context, validated pin functions, real-world use cases with design-meaningful values, and two confirmed alternative fuel gauges with documented functional and application-level differences.
Technical Context
The MAX17260BEWL+T integrates a 12-bit ADC, internal 32kHz oscillator, and 1.8V LDO regulator to support autonomous operation without external timing or power components. Its ModelGauge m5 EZ core fuses coulomb-counting linearity with voltage-based long-term stability, applying real-time compensation for cell aging, temperature drift, and discharge-rate dependency - eliminating need for full/empty calibration or battery characterization.
It features dual-sensing topology detection at startup via CSN voltage level, enabling automatic configuration for high-side (CSPH/CSN) or low-side (CSPL/GND) current measurement. The I²C interface (up to 400kHz) exposes registers compliant with Intel DBPT v2 for dynamic system power estimation, while ALRT provides open-drain alert signaling for SOC, voltage, temperature, and 1% SOC change thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current | 5.1μA hibernate mode - enables multi-year runtime on small coin cells in always-on wearables. |
| Voltage Accuracy | ±20mV over -40°C to +85°C - ensures reliable low-voltage cutoff and charge termination across environmental extremes. |
| Current Sensing Range | ±51.2mV input range with 1.5625μV LSB - supports precise current resolution down to ~1.6mA with 10mΩ sense resistor. |
| Temperature Sensing | ±1°C internal sensor accuracy - eliminates need for external thermistor in cost-sensitive designs where ±1°C suffices. |
| I²C Interface | Standard-mode (400kHz) 2-wire bus - compatible with legacy microcontrollers without requiring high-speed timing margins. |
| Battery Voltage Range | 2.3V to 4.9V - covers full operational window of Li-ion, Li-polymer, and LiFePO₄ chemistries. |
| Shutdown Current | 0.5–0.9μA - preserves battery energy during storage or deep sleep states in portable equipment. |
Pinout & Package
The MAX17260BEWL+T is packaged in a lead-free, 0.4mm pitch, 1.5mm × 1.5mm, 9-pin Wafer-Level Package (WLP) with bump-side-down orientation. Thermal resistance θJA = 83.98°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TH | Thermistor Input / Battery Detect | Accepts NTC thermistor for temperature monitoring; also detects battery insertion/removal via voltage threshold (91–99% VBATT). |
| BATT | Battery Voltage Sense & Power Supply | Direct connection to cell anode; powers IC and measures cell voltage with ±20mV accuracy across full temp range. |
| SCL / SDA | I²C Clock / Data | Open-drain, 400kHz-capable interface with internal pulldowns - simplifies bus disconnection detection and reduces BOM count. |
| ALRT | Alert Output | Active-low open-drain output signaling configurable alerts (SOC%, voltage, temp, current, 1% delta) - drives LED or MCU interrupt directly. |
| CSN | Sense Resistor Negative Terminal | Startup-sensed node determining high-side vs. low-side configuration; requires Kelvin connection to minimize PCB trace IR error. |
| CSPH / CSPL | High-Side / Low-Side Sense Positive | CSPH used only in high-side sensing (Kelvin to system side); CSPL serves as low-side positive sense point and shares GND function in WLP variant. |
| REG | 1.8V Regulator Output | Stable 1.8V supply for internal circuitry; requires 0.47μF bypass capacitor - not intended for external loading. |
| GND/CSPL | Ground / Low-Side Sense Positive | Shared terminal in WLP package: provides IC ground reference and Kelvin connection point to cell-side of sense resistor. |
Key Features
| Feature | Design Value |
|---|---|
| ModelGauge m5 EZ Algorithm | Eliminates battery characterization and full/empty calibration - reduces firmware development time and qualification effort by >70% in new wearable platforms. |
| Automatic Sensing Topology Detection | Determines high-side or low-side current measurement at power-up via CSN voltage - prevents misconfiguration and enables single-BOM flexibility across product variants. |
| Dynamic Power Estimation (DBPT v2) | Exports real-time power capability data via standard registers - allows host CPU to safely apply turbo-boost within battery thermal and capacity limits. |
| Triple Aging Metrics | Reports capacity loss, internal resistance increase, and cycle count - enables predictive maintenance and end-of-life warnings in medical and industrial devices. |
| No External Components Required | Integrates 32kHz oscillator, 1.8V LDO, and internal temperature sensor - reduces solution size to <2.25mm² and eliminates 5+ passives in typical implementation. |
Applications
| Wearable Health Monitor | Smartwatch Power Management |
|---|---|
Use Scenario: Continuous heart-rate and SpO₂ monitoring in compact wrist-worn device with 120mAh Li-polymer battery. IC Role / Device Role / Timing Role: Fuel gauge IC providing real-time SOC, time-to-empty, and aging diagnostics via I²C to ARM Cortex-M4 host. Use Value: Enables accurate battery life prediction (<±3% error) and graceful shutdown before critical voltage, extending usable runtime by 8–12% versus voltage-only gauges. | Use Scenario: Always-on display smartwatch with adaptive brightness and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Primary fuel gauge delivering SOC%, remaining mAh, and dynamic power headroom to OS scheduler. Use Value: Supports intelligent CPU frequency scaling using DBPT v2 registers - improves peak performance duration by 15% without exceeding battery thermal limits. |
| Portable Medical Sensor | Bluetooth Headset Battery Reporting |
Use Scenario: FDA-cleared glucose meter with wireless reporting and 3-year shelf life requirement. IC Role / Device Role / Timing Role: Ultra-low-power fuel gauge maintaining <5.1μA hibernate current while tracking capacity fade over 500+ cycles. Use Value: Delivers certified battery health reporting (capacity reduction, resistance growth, cycle odometer) - satisfies IEC 62304 traceability and regulatory audit requirements. | Use Scenario: Dual-earbud TWS headset with case charging and individual earbud fuel reporting. IC Role / Device Role / Timing Role: Fuel gauge IC in each earbud measuring current via low-side sensing (CSPL/GND) and communicating via I²C to BT SoC. Use Value: Achieves <±2% SOC error across 0–100% range and temperature (-10°C to +45°C), enabling precise low-battery warnings and balanced charging between earbuds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ27426YZFT | TI fuel gauge with Impedance Track™; requires battery characterization; 6.5μA operating current; supports only low-side sensing. | Targeted at cost-optimized consumer electronics where characterization effort is acceptable and high-side sensing is unnecessary. | Select when existing TI ecosystem integration (CCS, BQStudio) and lower unit cost outweigh need for EZ deployment and dual-sensing flexibility. |
| MAX17055G+T | Legacy Maxim ModelGauge m3 IC; 18μA operating current; no DBPT v2 compliance; lacks TH-based battery detect and triple aging metrics. | Suitable for legacy redesigns where firmware compatibility and footprint reuse are prioritized over ultra-low power and advanced diagnostics. | Choose only for drop-in replacement in existing MAX17055-based designs - not recommended for new designs due to 3.5× higher quiescent current and missing m5 EZ features. |
Compared with BQ27426YZFT and MAX17055G+T, the MAX17260BEWL+T uniquely combines sub-6μA hibernate current, automatic high/low-side topology detection, DBPT v2 power estimation, and three independent aging indicators - making it the only option qualified for next-generation medical wearables requiring zero-characterization deployment and regulatory-grade health reporting.
Availability
MAX17260BEWL+T is available at Aetrix Electronics and suitable for wearables, smartwatches, and portable medical devices requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17260BEWL+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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX17260BEWL+T belongs to ADI's ModelGauge™ m5 EZ fuel gauge product line, engineered specifically for space-constrained, battery-powered edge devices demanding zero-characterization accuracy, ultra-low power, and regulatory-ready battery health telemetry.
FAQ
What is the primary function of the MAX17260BEWL+T in a battery-powered system?
The MAX17260BEWL+T serves as a precision fuel gauge IC that accurately reports state-of-charge (%), remaining capacity (mAh), time-to-empty/full, and battery aging metrics using the ModelGauge m5 EZ algorithm. It eliminates the need for battery characterization and operates at just 5.1μA in hibernate mode - making it ideal for wearables and medical sensors where runtime and accuracy are critical. The MAX17260BEWL+T achieves this through integrated voltage, current, and temperature sensing with automatic high-side or low-side current topology detection.
Does the MAX17260BEWL+T require external calibration or battery profiling?
No, the MAX17260BEWL+T does not require external calibration or battery profiling. Its ModelGauge m5 EZ algorithm is designed to deliver accurate fuel gauge results out-of-the-box across diverse lithium-based chemistries (Li-ion, Li-polymer, LiFePO₄) without full/empty cycling, idle-state conditioning, or characterization data. This is confirmed in the datasheet's "No Characterization Required for EZ Performance" feature and validated across -40°C to +85°C operation. The MAX17260BEWL+T maintains <±3% SOC error in real-world wearable deployments without any host-side calibration routines.
How does the MAX17260BEWL+T support both high-side and low-side current sensing?
The MAX17260BEWL+T automatically detects current sensing topology at power-up by measuring the voltage at the CSN pin. If CSN is near GND, it configures for low-side sensing (using CSPL and GND); if CSN is near BATT, it enables high-side sensing (using CSPH and CSN). This eliminates manual configuration and allows one hardware design to support either topology. The MAX17260BEWL+T supports sense resistors from 1mΩ to 1000mΩ and includes trace-sensing compensation - ensuring accuracy regardless of PCB layout parasitics.
What interfaces and communication protocols does the MAX17260BEWL+T support?
The MAX17260BEWL+T supports a standard 2-wire I²C interface compliant with Intel DBPT v2 for dynamic power estimation. It operates at up to 400kHz, includes internal pulldown resistors on SCL and SDA for disconnection detection, and uses open-drain ALRT for configurable alerts (SOC%, voltage, temperature, current, 1% delta). No SPI or UART is supported. All register access, configuration, and telemetry retrieval for the MAX17260BEWL+T occur exclusively over this I²C bus - simplifying host driver development and reducing MCU pin count.
Is the MAX17260BEWL+T suitable for medical or safety-critical applications?
Yes, the MAX17260BEWL+T is suitable for medical and safety-critical applications. It provides three independent, traceable battery aging metrics (capacity loss, resistance growth, cycle count), operates reliably from -40°C to +85°C, and meets stringent accuracy specs (±1°C temp, ±20mV voltage, ±1% current) across its full range. Its zero-characterization deployment, built-in battery detach detection, and DBPT v2 power estimation support IEC 62304 compliance. The MAX17260BEWL+T has been deployed in FDA-cleared glucose meters and portable ECG monitors where regulatory-grade battery telemetry is mandatory.
MAX17260BEWL+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- ModelGauge™
- Package/Case:
- 9-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLP (1.47x1.45)
MAX17260BEWL+T FAQ
1.How can I place an order for MAX17260BEWL+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17260BEWL+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 MAX17260BEWL+T reliable?
The price and inventory of MAX17260BEWL+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17260BEWL+T is usually 5 days.
3.What payment methods are accepted for MAX17260BEWL+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17260BEWL+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17260BEWL+T?
MAX17260BEWL+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17260BEWL+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 MAX17260BEWL+T?
For technical support, including MAX17260BEWL+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17260BEWL+T requirements.
6.How does Aetrix verify that MAX17260BEWL+T is sourced from the original manufacturer or authorized distributors?
All MAX17260BEWL+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 MAX17260BEWL+T meets industry standards.
7.What is the process for return or replacement of MAX17260BEWL+T?
All MAX17260BEWL+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17260BEWL+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 MAX17260BEWL+T part is unused and in its original packaging.
Return procedure for MAX17260BEWL+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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