1-Cell Fuel Gauge with ModelGauge m3

1-Cell Fuel Gauge with ModelGauge m3

Please check latest availability status for a specific part variant.


The MAX17050 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge.

The MAX17047/MAX17050 incorporate the Maxim ModelGauge m3 algorithm that combines the excellent short-term accuracy and linearity of a coulomb counter with the excellent long-term stability of a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel-gauge accuracy. ModelGauge m3 cancels offset accumulation error in the coulomb counter while providing better short-term accuracy than any purely voltage-based fuel gauge. Additionally, the ModelGauge m3 algorithm does not suffer from abrupt corrections that normally occur in coulomb-counter algorithms since tiny continual corrections are distributed over time.

The device automatically compensates for aging, temperature, and discharge rate and provides accurate state of charge (SOC) in mAh or %, as well as time-to-empty over a wide range of operating conditions. The device provides two methods for reporting the age of the battery: reduction in capacity and cycle odometer.

The device provides precision measurements of current, voltage, and temperature. Temperature of the battery pack is measured using an external thermistor supported by ratiometric measurements on an auxiliary input. A 2-wire (I2C) interface provides access to data and control registers. The MAX17047 is available in a lead(Pb)-free, 3mm x 3mm, 10-pin TDFN package. The MAX17050 is available in a 0.4mm pitch 9-bump WLP package.

Integrating the Maxim ModelGauge™ m3 algorithm that combines the excellent short-term accuracy and linearity of a coulomb counter | Block Diagam Integrating the Maxim ModelGauge™ m3 algorithm that combines the excellent short-term accuracy and linearity of a coulomb counter | Block Diagam Enlarge+

Key Features

  • Accurate Battery-Capacity and Time-To-Empty Estimation
    • Temperature, Age, and Rate Compensated
    • Does Not Require Empty, Full, or Idle States to Maintain Accuracy
  • Precision Measurement System
    • No Calibration Required
  • ModelGauge m3 Algorithm
    • Long-Term Influence by Voltage Fuel Gauge Cancels Coulomb-Counter Drift
    • Short-Term Influence by Coulomb Counter Provides Excellent Linearity
    • Adapts to Cell Characteristics
  • External Temperature-Measurement Network
    • Actively Switched Thermistor Resistive Divider Reduces Current Consumption
  • Low Quiescent Current
    • 25µA Active, < 0.5µA Shutdown
  • Alert Indicator for SOC, Voltage, Temperature, and Battery Removal/Insertion Events
  • AtRate Estimation of Remaining Capacity
  • 2-Wire (I2C) Interface
  • Tiny, Lead(Pb)-Free, 3mm x 3mm, 10-Pin TDFN Package or Tiny 0.4mm Pitch 9-Bump WLP Package


  • Digital Still, Video and Action Cameras
  • Handheld Computers and Terminals
  • Health and Fitness Monitors
  • Medical Devices
  • Smartphones, Tablets
  • Wireless Speakers
Part NumberFunctionsBattery TypeInterfaceParameters MeasuredFuel Gauge AlgorithmApplicationsVSUPPLY
Package/PinsOper. Temp.
MAX17047 Fuel Gauge1 Cell Li-Ion2-Wire
State of Charge
ModelGauge m3Host2.54.5
-40 to +85
See All Battery Monitors, Protectors, and Selectors (45)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX17050EVKIT: Evaluation Kit for the MAX17050

Quality and Environmental Data

Product Reliability Reports: MAX17050.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX17050X+
  • MAX17050X+T10
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


    Related Resources

    14-Channel High-Voltage Data-Acquisition System

    • 65V Operating Voltage
    • Ultra-Low-Power Operation
    • Redundant ADC and Comparator (COMP) Acquisitions

    USB Type-C, 3A Switch-Mode Buck Charger with Integrated CC Detection, Reverse Boost, and ADC

    • Single-Input Switch Mode Charger
    • USB Type-C Detection
    • One Safeout LDO
    • I2C-Compatible Interface