1. Products
  2. Power Management
  3. Battery Management
  4. Battery Fuel Gauge and Coulomb Counter
  5. MAX17049


Features and Benefits

  • MAX17048: 1 Cell, MAX17049: 2 Cells
  • Precision ±7.5m­V/Cell Voltage Measurement
  • ModelGauge Algorithm
    • Provides Accurate State-of-Charge
    • Compensates for Temperature/Load Variation
    • Does Not Accumulate Errors, Unlike Coulomb Counters
    • Eliminates Learning
    • Eliminates Current-Sense Resistor
  • Ultra-Low Quiescent Current
    • 3µA Hibernate, 23µA Active
    • Fuel Gauges in Hibernate Mode
    • Automatically Enters and Exits Hibernate Mode
  • Reports Charge and Discharge Rate
  • Battery-Insertion Debounce
    • Best of 16 Samples to Estimate Initial SOC
  • Programmable Reset for Battery Swap
    • 2.28V to 3.48V Range
  • Configurable Alert Indicator
    • Low SOC
    • 1% Change in SOC
    • Battery Undervoltage/Overvoltage
    • VRESET Alert
  • I2C Interface
  • 8-Bit OTP ID Register (Contact Factory)

Product Details

The MAX17048/MAX17049 ICs are tiny, micropower current fuel gauges for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17048 operates with a single lithium cell and the MAX17049 with two lithium cells in series.

The ICs use the sophisticated Li+ battery-modeling algorithm ModelGauge to track the battery relative state-of-charge (SOC) continuously over widely varying charge and discharge conditions. The ModelGauge algorithm eliminates current-sense resistor and battery-learn cycles required in traditional fuel gauges. Temperature compensation is implemented using the system microcontroller.

The ICs automatically detect when the battery enters a low-current state and switches into a low-power 3µA hibernate mode, while still providing accurate fuel gauging. The ICs automatically exit hibernate mode when the system returns to active state.

On battery insertion, the ICs debounce initial voltage measurements to improve the initial SOC estimate, thus allowing them to be located on system side. SOC, voltage, and rate information is accessed using the I2C interface. The ICs are available in a tiny 0.9mm × 1.7mm, 8-bump wafer-level package (WLP), or a 2mm × 2mm, 8-pin TDFN package.


  • Bluetooth Headsets
  • Digital Still, Video, and Action Cameras
  • Handheld Computers and Terminals
  • Health and Fitness Monitors
  • Home and Building Automation, Sensors
  • Medical Devices
  • Smartphones, Tablets
  • Smartwatches, Wearables
  • Wireless Speakers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (4)

Tools & Simulations

Product Recommendations

MAX17049 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX17049G+ Material Declaration Reliability Data Thin Dual Flatpack No Leads
MAX17049G+T10 Material Declaration Reliability Data Thin Dual Flatpack No Leads
MAX17049X+ Material Declaration Reliability Data Wafer-Level Package 2x4 Bump, Full Array
MAX17049X+T10 Material Declaration Reliability Data Wafer-Level Package 2x4 Bump, Full Array
Wafer Fabrication Data MAX17049 Reliability Data

Sample & Buy

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Lead Times

Please see the latest communication from our CCO regarding lead times.



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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.