EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX17260 5.1A 1-Cell Fuel Gauge with ModelGauge m5 EZ and Optional High-Side Current Sensing General Description Benefits and Features The MAX17260 is an ultra-low power fuel gauge IC which ModelGauge m5 EZ implements the Maxim ModelGauge m5 algorithm. The No Characterization Required for EZ Performance IC monitors a single-cell battery pack and supports both Robust Against Battery Variation high-side and low-side current sensing. Eliminates Error Near Empty Voltage Eliminates Coulomb-Counter Drift The ModelGauge m5 EZ algorithm makes fuel gauge im- Compensates for Age, Current, and Temperature plementation easy by eliminating battery characterization Does Not Require Empty, Full, or Idle States requirements and simplifying host software interaction. The algorithm provides tolerance against battery diversity Low 5.1A Operating Current for most lithium batteries and applications. The algorithm Accurate Current Sensing combines the short-term accuracy and linearity of a High-Side or Low-Side Sensing Option coulomb counter with the long-term stability of a voltage- Wide Sense Resistor Range: 1m to 1000m based fuel gauge, along with temperature compensation Trace Sensing with Temperature Compensation to provide industry-leading fuel gauge accuracy. The Supports Li+ and Variants Including LiFePO 4 IC automatically compensates for cell-aging, temperature, Thermistor or 1C Internal Temperature discharge rate, and provides accurate state-of-charge Dynamic Power Estimates Power Capability During (SOC) in percentage (%) and remaining capacity in mil- Discharge liampere-hours (mAh) over a wide range of operating con- Time-to-Empty and Time-to-Full Estimation ditions. As the battery approaches the critical region near Predicts Remaining Capacity Under Theoretical Load empty, the algorithm invokes a special correction mecha- No Calibration Required nism that eliminates any error. The IC provides accurate Alert Indicator for Voltage, SOC, Temperature, estimation of time-to-empty and time-to-full and provides Current, and 1% SOC Change three methods for reporting the age of the battery: reduc- Ordering Information appears at end of data sheet. tion in capacity, increase in battery resistance, and cycle odometer. The IC provides precision measurements of current, volt- Simple Fuel-Gauge Circuit Diagram age, and temperature. The temperature of the battery pack is measured using an internal temperature sensor or OPTIONAL HIGH-SIDE 2 SENSING external thermistor. A 2-wire I C interface provides access to data and control registers. The IC is available in tiny SYSPWRSYSPWR RSENSE lead-free 0.4mm pitch, 1.5mm x 1.5mm, 9-pin WLP pack- CSN CSPH age and 3mm x 3mm, 14-pin TDFN package. BATT 0.1F REG Applications 0.47F Wearables, Smartwatches MAX17260MAX17260 ALRT Tablets, 2-in-1 Laptops SDA Bluetooth Headsets PROTECTION SCL Health and Fitness Monitors CIRCUIT Digital Still, Video, and Action Cameras TH Medical Devices CSPL (TDFN) EP (TDFN) GND CSN Handheld Computers and Terminals 10k Wireless Speakers NTC Home and Building Automation, Sensors R SENSE SYSGNDSYSGND Portable Game Players Toys ModelGauge is a trademark of Maxim Integrated Products, Inc. 19-100249 Rev 1 6/18MAX17260 5.1A 1-Cell Fuel Gauge with ModelGauge m5 EZ and Optional High-Side Current Sensing TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simple Fuel-Gauge Circuit Diagram . 1 Absolute Maximum Ratings 6 Package Information . 6 WLP . 6 TDFN 6 Electrical Characteristics . 7 Typical Operating Characteristics 10 Pin Configuration(s) . 12 TDFN . 12 WLP 12 Pin Descriptions . 13 Functional Diagram . 14 Detailed Description 14 ModelGauge m5 EZ Performance . 15 Application Notes 16 Standard Register Formats . 16 ModelGauge m5 EZ Configuration Registers . 16 DesignCap Register (18h) . 16 VEmpty Register (3Ah) 17 ModelCfg Register (DBh) 17 IChgTerm Register (1Eh) 17 Config Register (1Dh) and Config2 Register (BBh) 18 ModelGauge m5 Algorithm . 19 ModelGauge m5 Algorithm Output Registers . 20 RepCap Register (05h) . 20 RepSOC Register (06h) . 21 FullCapRep Register (10h) . 21 TTE Register (11h) . 21 TTF Register (20h) . 21 Cycles Register (17h) . 21 Status Register (00h) . 21 Analog Measurements 22 Voltage Measurement 22 VCell Register (09h) 22 www.maximintegrated.com Maxim Integrated 2