EVALUATION KIT AVAILABLE MAX17040/MAX17041 1-Cell/2-Cell Fuel Gauge with ModelGauge General Description Features The MAX17040/MAX17041 are ultra-compact, low-cost, Host-Side or Battery-Side Fuel Gauging host-side fuel-gauge systems for lithium-ion (Li+) batter- 1 Cell (MAX17040) ies in handheld and portable equipment. The MAX17040 2 Cell (MAX17041) is configured to operate with a single lithium cell and the Precision Voltage Measurement MAX17041 is configured for a dual-cell 2S pack. 12.5mV Accuracy to 5.00V (MAX17040) 30mV Accuracy to 10.00V (MAX17041) The MAX17040/MAX17041 use a sophisticated Li+ Accurate Relative Capacity (RSOC) Calculated from battery-modeling scheme, called ModelGauge to track the batterys relative state-of-charge (SOC) continuously ModelGauge Algorithm over a widely varying charge/discharge profile. Unlike No Offset Accumulation on Measurement traditional fuel gauges, the ModelGauge algorithm elimi- No Full-to-Empty Battery Relearning Necessary nates the need for battery relearn cycles and an external No Sense Resistor Required current-sense resistor. Temperature compensation is pos- 2-Wire Interface sible in the application with minimal interaction between a Low Power Consumption C and the device. Tiny, Lead(Pb)-Free, 8-Pin, 2mm x 3mm TDFN The IC can be located on the system side, reducing cost Package or Tiny 0.4mm Pitch 9-Bump UCSP Package and supply chain constraints on the battery. Measurement and estimated capacity data sets are accessed through Ordering Information 2 an I C interface. The MAX17040/MAX17041 are avail- PART TEMP RANGE PIN-PACKAGE able in either a 0.4mm pitch 9-bump UCSP or 2mm x MAX17040G+U -20C to +70C 8 TDFN-EP* 3mm, 8-pin TDFN lead-free package. MAX17040G+T -20C to +70C 8 TDFN-EP* Applications MAX17040X+U -20C to +70C 9 UCSP Smartphones, Tablets Handheld Computers MAX17040X+T10 -20C to +70C 9 UCSP Health and Fitness and Terminals MAX17041G+U -20C to +70C 8 TDFN-EP* Monitors Wireless Speakers MAX17041G+T -20C to +70C 8 TDFN-EP* Medical Devices MAX17041X+ -20C to +70C 9 UCSP Digital Still, Video, and Action Cameras MAX17041X+T10 -20C to +70C 9 UCSP ModelGauge is a trademark of Maxim Integrated Products, Inc. +Denotes a lead(Pb)-free/RoHS-compliant package. UCSP is a trademark of Maxim Integrated Products, Inc. T = Tape and reel. Visit www.maximintegrated.com/products/patents for product *EP = Exposed pad. patent marking information. Pin Configurations appear at end of data sheet. Simple Fuel Gauge Circuit Diagram 150 1k SYSTEM CELL V DD P MAX17040 MAX17041 SEO Li+ EO PROTECTION CTG SDA 2 CIRCUIT I C BUS MASTER GND SCL EP 1F 10nF 19-5210 Rev 9 10/16MAX17040/MAX17041 1-Cell/2-Cell Fuel Gauge with ModelGauge Absolute Maximum Ratings Voltage on CTG Pin Relative to GND ...................-0.3V to +12V Storage Temperature Range Voltage on CELL Pin Relative to GND ..................-0.3V to +12V (T = 0C to +70C (Note 10)) ..................... -55C to +125C A Voltage on All Other Pins Relative to GND .............-0.3V to +6V Lead Temperature (TDFN only, soldering, 10s) ..............+300C Operating Temperature Range ........................... -40C to +85C Soldering Temperature (reflow) .......................................+260C Power Dissipation .........1333mW at +70C (derate 16.7mW/C) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics Recommended DC Operating Conditions (2.5V V 4.5V, T = -20C to +70C, unless otherwise noted.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 1) +2.5 +4.5 V DD SCL, SDA, Data I/O Pins (Note 1) -0.3 +5.5 V EO, SEO MAX17040 CELL Pin V (Note 1) -0.3 +5.0 V CELL MAX17041 CELL Pin V (Note 1) -0.3 +10.0 V CELL DC Electrical Characteristics (2.5V V 4.5V, T = -20C to +70C, unless otherwise noted. Contact Maxim for V greater than 4.5V.) DD A DD PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS With on-chip clock in use 50 75 Active Current I A ACTIVE With external 32kHz clock 40 65 V = 2.0V 0.5 1.0 DD Sleep-Mode Current (Note 2) I A SLEEP 1 3 V = 3.6V at +25C -1 +1 DD Time-Base Accuracy (Note 3) t T = 0C to +70C (Note 10) -2 +2 % ERR A T = -20C to +70C -3 +3 A T = +25C, V = V -12.5 +12.5 MAX17040 Voltage- A IN DD Measurement Error -30 +30 V mV GERR T = +25C, 5.0V < V < 9.0V -30 +30 MAX17041 Voltage- A IN Measurement Error 5.0V < V < 9.0V -60 +60 IN CELL Pin Input Impedance R 15 M CELL Input Logic-High: V (Note 1) 1.4 V IH SCL, SDA, EO, SEO Input Logic-Low: V (Note 1) 0.5 V IL SCL, SDA, EO, SEO Output Logic-Low: SDA V I = 4mA (Note 1) 0.4 V OL OL Pulldown Current: SCL, SDA I V = 4.5V, V = 0.4V 0.2 A PD DD PIN Input Capacitance: EO C 50 pF BUS Bus Low Timeout t (Note 4) 1.75 2.5 s SLEEP Maxim Integrated 2 www.maximintegrated.com