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Analog Devices Inc./Maxim Integrated MAX17262REWL+
- Part No.:
- MAX17262REWL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Battery Management
- Package:
- 9-WFBGA, WLBGA
- Datasheet:
-
MAX17262REWL+.pdf
- Description:
- IC BATT LIFEPO4/LI-ION 1C 9WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,739
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Product details
Overview
MAX17262REWL+ 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 (±3% reading), and temperature (±1°C) measurements with integrated 7mΩ current-sense resistor, delivering accurate state-of-charge (%), remaining capacity (mAh), time-to-empty/full, and battery age metrics across -40°C to +85°C. It targets space-constrained wearable and medical devices requiring long-term accuracy without battery characterization.
For engineers reviewing the MAX17262REWL+ datasheet, MAX17262REWL+ pinout, MAX17262REWL+ application, or MAX17262REWL+ equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in wearables and medical monitors, and two confirmed alternative fuel gauges with documented functional and application-level differences.
Technical Context
The MAX17262REWL+ integrates a 32kHz oscillator, 16-bit ADC, internal 1.8V LDO regulator, and dual-mode thermistor interface (internal sensor or external NTC). Its ModelGauge m5 EZ algorithm fuses coulomb-counting linearity with voltage-based long-term stability, dynamically compensating for aging, temperature, and discharge rate without requiring full/empty calibration states.
It supports I²C communication at up to 400kHz, provides alert outputs for SOC, voltage, temperature, and current thresholds, and features a unique serial number for cloud authentication. The device operates from 2.3V–4.9V, draws only 5.2μA in hibernate mode, and uses internal current sensing-eliminating external sense resistors for most designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Current (Hibernate) | 5.2μA - enables multi-year battery life in always-on wearables and sensors. |
| Voltage Measurement Error | ±20mV over -40°C to +85°C - ensures reliable low-voltage cutoff and SOC estimation near end-of-discharge. |
| Current Sensing Resistance | 7mΩ (integrated) - supports up to 1.7A continuous current at 100% utilization, eliminating external shunt placement. |
| Temperature Accuracy | ±1°C (internal sensor) - enables precise thermal derating of capacity and aging models without external components. |
| I²C Interface Speed | Up to 400kHz - allows fast host polling of SOC, TTE, TTF, and cycle count registers without bus contention. |
| Battery Capacity Range | 30mAh to 6Ah - covers coin cells in hearables and larger Li-ion packs in handheld medical instruments. |
| Supply Voltage Range | 2.3V to 4.9V - compatible with standard Li-ion (3.0–4.2V), LiFePO₄ (2.5–3.65V), and aged-cell operation. |
Pinout & Package
The MAX17262REWL+ is housed in a lead-free, 0.4mm pitch, 1.5mm × 1.5mm, 9-pin wafer-level package (WLP) with bump-side-down mounting. Thermal resistance θJA is 83.98°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 TH | Thermistor input / battery detect | Accepts external NTC (10kΩ or 100kΩ) or uses internal sensor; detects battery insertion/removal via voltage threshold (91–99% VBATT). |
| B1 SCL | I²C clock input | Open-drain compatible; includes internal pulldown for disconnection detection; supports 400kHz timing. |
| C1 SDA | I²C data I/O | Open-drain bidirectional line; internal pulldown enables hot-plug detection; requires external pull-up. |
| A2 BATT | Battery voltage supply & sense | Primary power input and cell voltage measurement node; bypassed with 0.1μF to GND for ADC stability. |
| C3 GND | Ground reference | Analog/digital common return; must be low-impedance connection to minimize measurement noise. |
| C2 ALRT | Active-low alert output | Open-drain flag for SOC, voltage, temperature, or current threshold breaches; requires external pull-up. |
| C3 REG | 1.8V LDO output | Stable internal regulator output; bypassed with 0.47μF capacitor; not intended for external loading. |
| B2 SYS | System power path monitor | Connects to system load side of protection circuit; enables dynamic power estimation during discharge. |
| A3 NC | No connection | Unbonded pad; must remain unconnected per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| ModelGauge m5 EZ algorithm | Eliminates battery characterization, removes need for full/empty/idle states, and corrects error near empty voltage - reducing firmware integration effort by >70% vs. legacy gauges. |
| Integrated 7mΩ current sense | Removes external shunt resistor and associated PCB area, layout complexity, and thermal drift errors - ideal for sub-20mm² wearables. |
| Dynamic power estimation | Reports real-time power capability (mW) using voltage/current/temperature data - enables safe CPU turbo-boost control per Intel DBPT v2 standard. |
| Three battery aging indicators | Tracks capacity loss, internal resistance rise, and cycle count independently - supports predictive maintenance in medical and industrial assets. |
| Unique serial number | Factory-programmed 64-bit ID enables secure cloud-based device authentication and anti-counterfeiting in regulated medical applications. |
Applications
| Wearable Health Monitor | Smart Hearing Aid Case |
|---|---|
|
Use Scenario: Continuous heart-rate and SpO₂ monitoring in a wrist-worn fitness tracker powered by a 120mAh Li-ion cell. IC Role / Device Role: Primary fuel gauge providing %SOC, mAh remaining, and time-to-empty under variable 5–50mA load profiles. Use Value: Achieves ±2% SOC accuracy over 500 cycles without recalibration, extending field service intervals and improving user trust in battery warnings. |
Use Scenario: Charging and runtime management for a Bluetooth-enabled hearing aid case with dual 200mAh Li-ion cells. IC Role / Device Role: Single-cell gauge monitoring each battery independently via shared I²C bus and discrete TH lines. Use Value: Enables precise "low-battery" alerts at 5% SOC and accurate charge-cycle counting for warranty analytics and replacement forecasting. |
| Portable ECG Device | Wireless Sensor Node |
|
Use Scenario: FDA-cleared handheld ECG recorder operating from a 400mAh Li-ion battery with 72-hour clinical-grade runtime. IC Role / Device Role: Safety-critical fuel gauge feeding SOC and time-to-empty into firmware-controlled shutdown logic. Use Value: Guarantees <1% error at 3% SOC via special correction mechanism - preventing unexpected power loss during patient recording. |
Use Scenario: Battery-powered environmental sensor node deployed in HVAC ducts with 10-year target lifetime. IC Role / Device Role: Long-term capacity tracker reporting degradation (ΔCapacity, ΔResistance, Cycles) via BLE to gateway. Use Value: Delivers field-proven aging prediction with ±1.5% capacity loss accuracy over 3 years - enabling proactive maintenance scheduling. |
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 gauge with 3.3V-only I²C interface; no integrated current sense - requires external 10mΩ shunt; 7μA hibernate current. | Requires additional PCB area and layout care for shunt; lacks dynamic power estimation and serial number feature. | Select when existing design uses TI ecosystem and external sensing is already implemented. |
| MAX17055G+T | Analog Devices predecessor with ModelGauge m3; higher 18μA active current; supports 2-cell stacks; no m5 EZ simplification. | Needs full battery characterization; less accurate near empty; no built-in aging metrics or DBPT v2 compliance. | Select only for legacy drop-in where m3 algorithm compatibility is mandatory and power budget allows. |
Compared with BQ27426YZFT and MAX17055G+T, the MAX17262REWL+ uniquely combines ultra-low hibernate current (5.2μA), integrated 7mΩ sensing, ModelGauge m5 EZ's zero-calibration workflow, and Intel DBPT v2–compliant power estimation - making it optimal for next-gen compact, authenticated, and power-aware portable medical and wearable systems.
Availability
MAX17262REWL+ is available at Aetrix Electronics and suitable for wearable health monitors, portable medical diagnostics, and wireless sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLP packaging.
Supply support for MAX17262REWL+ 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17262REWL+ belongs to Analog Devices' ModelGauge m5 EZ fuel-gauge product line, engineered specifically for ultra-low-power, small-form-factor battery management in wearables, hearables, and portable medical devices where calibration-free accuracy and aging intelligence are critical.
FAQ
What is the primary function of the MAX17262REWL+?
The MAX17262REWL+ is a single-cell lithium-based 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 integrates voltage, current (via 7mΩ internal sense), and temperature measurement - all within a 1.5mm × 1.5mm WLP package - and requires no battery characterization or full/empty calibration.
Does the MAX17262REWL+ require an external current-sense resistor?
No. The MAX17262REWL+ includes an integrated 7mΩ current-sense element, eliminating the need for an external shunt resistor. This reduces BOM cost, PCB area, and thermal drift errors - particularly beneficial in space-constrained wearables and medical devices where layout simplicity and long-term accuracy are essential.
How does the MAX17262REWL+ handle battery aging compensation?
The MAX17262REWL+ automatically compensates for aging using three independent metrics: reduction in full-charge capacity, increase in battery resistance, and cycle count (odometer). These values are continuously updated and accessible via I²C registers (e.g., FullCapRep, RepCap, Cycles), enabling predictive maintenance and cloud-based battery health analytics without host software modeling.
What interfaces does the MAX17262REWL+ support?
The MAX17262REWL+ supports a standard 2-wire I²C interface operating up to 400kHz. It uses open-drain SDA/SCL with internal pulldowns for disconnection detection, and provides an active-low ALRT pin for configurable threshold alerts (SOC, voltage, temperature, current). No SPI or UART interface is supported.
Is the MAX17262REWL+ compatible with LiFePO₄ batteries?
Yes. The MAX17262REWL+ explicitly supports LiFePO₄ and other Li+ variants. Its 2.3V–4.9V operating range, programmable VEmpty register, and ModelGauge m5 EZ algorithm's robustness against battery chemistry variation enable accurate fuel gauging across Li-ion, Li-polymer, and LiFePO₄ chemistries without hardware or firmware changes.
MAX17262REWL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- ModelGauge™
- Package/Case:
- 9-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Fuel Gauge
- Battery Chemistry:
- LiFePO4/Li-ion
- Number of Cells:
- 1
- Fault Protection:
- Over Temperature
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLP (1.47x1.45)
MAX17262REWL+ FAQ
1.How can I place an order for MAX17262REWL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17262REWL+ 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 MAX17262REWL+ reliable?
The price and inventory of MAX17262REWL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17262REWL+ is usually 5 days.
3.What payment methods are accepted for MAX17262REWL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17262REWL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17262REWL+?
MAX17262REWL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17262REWL+ 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 MAX17262REWL+?
For technical support, including MAX17262REWL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17262REWL+ requirements.
6.How does Aetrix verify that MAX17262REWL+ is sourced from the original manufacturer or authorized distributors?
All MAX17262REWL+ 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 MAX17262REWL+ meets industry standards.
7.What is the process for return or replacement of MAX17262REWL+?
All MAX17262REWL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17262REWL+, 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 MAX17262REWL+ part is unused and in its original packaging.
Return procedure for MAX17262REWL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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