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5.1µA 1-Cell Fuel Gauge with ModelGauge m5 EZ and Optional High-Side Current Sensing

Industry's Lowest IQ Fuel Gauge with ModelGauge m5 EZ Eliminates Battery Characterization

Product Details

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 2-Wire
Parameters Measured Current
State of Charge
Temperature
Voltage
End Equipment Host
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 4.9
Package/Pins TDFN-CU/14
WLP/9
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.04
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Fuel Gauges, Protectors, and Monitors
Functions Fuel Gauge
Battery Type 1 Cell Li-Ion
Fuel Gauge Algorithm ModelGauge m5
Interface 2-Wire
Parameters Measured Current
State of Charge
Temperature
Voltage
End Equipment Host
VSUPPLY (V) (min) 2.3
VSUPPLY (V) (max) 4.9
Package/Pins TDFN-CU/14
WLP/9
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
1.04

Key Features

  • ModelGauge m5 EZ
    • No Characterization Required for EZ Performance
    • Robust Against Battery Variation
    • Eliminates Error Near Empty Voltage
    • Eliminates Coulomb-Counter Drift
    • Compensates for Age, Current, and Temperature
    • Does Not Require Empty, Full, or Idle States
  • Low 5.1µA Operating Current
  • Accurate Current Sensing
    • High-Side or Low-Side Sensing Option
  • Wide Sense Resistor Range: 1mΩ to 1000mΩ
  • Trace Sensing with Temperature Compensation
  • Supports Li+ and Variants Including LiFePO4
  • Thermistor or ±1°C Internal Temperature
  • Dynamic Power Estimates Power Capability During Discharge
  • Time-to-Empty and Time-to-Full Estimation
  • Predicts Remaining Capacity Under Theoretical Load
  • No Calibration Required
  • Alert Indicator for Voltage, SOC, Temperature, Current, and 1% SOC Change

Applications/Uses

  • Wearables, Smartwatches
  • Tablets, 2-in-1 Laptops
  • Bluetooth Headsets
  • Health and Fitness Monitors
  • Digital Still, Video, and Action Cameras
  • Medical Devices
  • Handheld Computers and Terminals
  • Wireless Speakers
  • Home and Building Automation, Sensors
  • Portable Game Players
  • Toys

Description

The MAX17260 is an ultra-low power fuel gauge IC which implements the Maxim ModelGauge m5 algorithm. The IC monitors a single-cell battery pack and supports both high-side and low-side current sensing.

The ModelGauge m5 EZ algorithm makes fuel gauge implementation easy by eliminating battery characterization requirements and simplifying host software interaction. The algorithm provides tolerance against battery diversity for most lithium batteries and applications. The algorithm combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel gauge accuracy. The IC automatically compensates for cell-aging, temperature, discharge rate, and provides accurate state-of-charge (SOC) in percentage (%) and remaining capacity in milliampere-hours (mAh) over a wide range of operating conditions. As the battery approaches the critical region near empty, the algorithm invokes a special correction mechanism that eliminates any error. The IC provides accurate estimation of time-to-empty and time-to-full and provides three methods for reporting the age of the battery: reduction in capacity, increase in battery resistance, and cycle odometer.

The IC provides precision measurements of current, voltage, and temperature. The temperature of the battery pack is measured using an internal temperature sensor or external thermistor. A 2-wire I2C interface provides access to data and control registers. The IC is available in tiny lead-free 0.4mm pitch, 1.5mm x 1.5mm, 9-pin WLP package and 3mm x 3mm, 14-pin TDFN package.

Design Solution: Choose a Fuel Gauge with the Right Current Sensing for Your Battery System ›

Simplified Block Diagram

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .