EVALUATION KIT AVAILABLE MAX17043/MAX17044 1-Cell/2-Cell Fuel Gauge with ModelGauge and Low-Battery Alert General Description Features The MAX17043/MAX17044 are ultra-compact, low-cost, Host-Side or Battery-Side Fuel Gauging host-side fuel-gauge systems for lithium-ion (Li+) batter- 1 Cell (MAX17043) ies in handheld and portable equipment. The MAX17043 2 Cell (MAX17044) is configured to operate with a single lithium cell and the Precision Voltage Measurement MAX17044 is configured for a dual-cell 2S pack. 12.5mV Accuracy to 5.00V (MAX17043) The MAX17043/MAX17044 use a sophisticated Li+ bat- 30mV Accuracy to 10.00V (MAX17044) tery-modeling scheme, called ModelGauge to track Accurate Relative Capacity (RSOC) Calculated from 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- nates the need for battery relearn cycles and an external No Full-to-Empty Battery Relearning Necessary current-sense resistor. Temperature compensation is pos- No Sense Resistor Required sible in the application with minimal interaction between a External Alarm/Interrupt for Low-Battery Warning C and the device. 2-Wire Interface The IC can be located on the system side, reducing cost Low Power Consumption and supply chain constraints on the battery. Measurement and estimated capacity data sets are accessed through Tiny, Lead(Pb)-Free, 8-Pin, 2mm x 3mm TDFN 2 an I C interface. The MAX17043/MAX17044 are avail- Package or Tiny 0.4mm Pitch 9-Bump UCSP Package able in either a 0.4mm pitch 9-bump UCSP or 2mm x Ordering Information 3mm, 8-pin TDFN lead-free package. PART TEMP RANGE PIN-PACKAGE Applications MAX17043G+U -20C to +70C 8 TDFN-EP* Smartphones, Tablets MAX17043G+T -20C to +70C 8 TDFN-EP* Health and Fitness Monitors MAX17043X+ -20C to +70C 9 UCSP Digital Still, Video, and Action Cameras MAX17043X+T10 -20C to +70C 9 UCSP Medical Devices MAX17044G+U -20C to +70C 8 TDFN-EP* Handheld Computers and Terminals MAX17044G+T -20C to +70C 8 TDFN-EP* Wireless Speakers MAX17044X+ -20C to +70C 9 UCSP ModelGauge is a trademark of Maxim Integrated Products, Inc. MAX17044X+T10 -20C to +70C 9 UCSP UCSP is a trademark of Maxim Integrated Products, Inc. +Denotes a lead(Pb)-free/RoHS-compliant package. Visit www.maximintegrated.com/products/patents for product T = Tape and reel. patent marking information. *EP = Exposed pad. Simple Fuel-Gauge Circuit Diagram 150 4.7k 1k SYSTEM CELL V P DD ALRT INTERRUPT MAX17043 MAX17044 Li+ QSTRT 1F PROTECTION CIRCUIT CTG SDA 2 I C BUS MASTER GND SCL EP 10nF 19-4811 Rev 7 1/17MAX17043/MAX17044 1-Cell/2-Cell Fuel Gauge with ModelGauge and Low-Battery Alert Absolute Maximum Ratings Voltage on CTG Pin Relative to V ....................-0.3V to +12V Storage Temperature Range GND Voltage on CELL Pin Relative to V ..................-0.3V to +12V (T = 0C to +70C (Note 10)).......................-55C to +125C GND A Voltage on All Other Pins Relative to V ..............-0.3V to +6V Lead Temperature (TDFN soldering only, 10s) ...............+300C GND Operating Temperature Range..............................-40C to +85C Soldering Temperature (reflow) .......................................+260C 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 QSTRT, (Note 1) -0.3 +5.5 V ALRT MAX17043 CELL Pin V (Note 1) -0.3 +5.0 V CELL MAX17044 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 Active Current I 50 75 A ACTIVE 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 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 MAX17043 Voltage- A IN DD mV Measurement Error -30 +30 V GERR T = +25C, 5.0V < V < 9.0V -30 +30 MAX17044 Voltage- A IN mV Measurement Error 5.0 < V < 9.0 -60 +60 IN CELL Pin Input Impedance R 15 M CELL Input Logic-High: V (Note 1) 1.4 V IH SCL, SDA, QSTRT Input Logic-Low: V (Note 1) 0.5 V IL SCL, SDA, QSTRT Output Logic-Low: SDA V I = 4mA (Note 1) 0.4 V OL OL V I = 2mA (Note 1) 0.4 V Output Logic-Low: ALRT OL-ALRT OL-ALRT Pulldown Current: SCL, SDA I V = 4.5V, V = 0.4V 0.2 A PD DD PIN Input Capacitance: SCL, SDA C 50 pF BUS Bus Low Timeout t (Note 3) 1.75 2.5 s SLEEP Mode Transition t (Note 4) 1 ms TRAN Maxim Integrated 2 www.maximintegrated.com