19-4634 5/09 DS2780 Standalone Fuel Gauge IC www.maxim-ic.com GENERAL DESCRIPTION FEATURES The DS2780 measures voltage, temperature and Precision Voltage, Temperature, and Current current, and estimates available capacity for Measurement System rechargeable Lithium Ion and Lithium Ion Polymer Internal Time Base is Accurate and Temperature batteries. Cell characteristics and application Stable parameters used in the calculations are stored in on- Absolute and Relative Capacity Estimated from chip EEPROM. The available capacity registers Coulomb Count, Discharge Rate, Temperature report a conservative estimate of the amount of and Battery Cell Characteristics charge that can be removed given the current Accurate Warning of Low Battery Conditions temperature, discharge rate, stored charge and Automatic Backup of Coulomb Count and Age application parameters. Capacity estimation reported Estimation to Nonvolatile (NV) EEPROM in mAh remaining and percentage of full. Gain and Tempco Calibration Allows the Use of Low-Cost Sense Resistors APPLICATIONS 24-Byte Battery/Application Parameter EEPROM 16-Byte User EEPROM Digital Still Cameras Unique ID and Multidrop 1-Wire Interface Sub-Notebook Computers Tiny 8-pin TSSOP & 10-pin TDFN Package Handheld PC Data Terminals Embeds Easily in Battery Packs Using Thin Prismatic Cells 3G Multimedia Wireless Handsets PIN CONFIGURATION TYPICAL OPERATING CIRCUIT PK+ 500 1K DS2780 150 DATA DQ 5 4 VDD 1 Cell PIO 8 3 VIN Li-Ion Battery NC 1 6 OVD SNS 7 2 VSS 5.6V TSSOP-8 0.1uF Protection Circuit RSNS PK- ORDERING INFORMATION PART MARKING PACKAGE INFORMATION DS2780E 2780 TSSOP DS2780E/T&R 2780 TSSOP Tape-and-Reel DS2780E+ 2780 TSSOP DS2780E+T&R 2780 TSSOP Tape-and-Reel DS2780G+ 2780 TDFN DS2780G+T&R 2780 TDFN Tape-and-Reel +Denotes lead(Pb)-free/RoHS-compliant package. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. Note : Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. 1 of 31 DS2780 Standalone Fuel Gauge IC ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to VSS -0.3V to +6.0V Voltage on VIN Relative to VSS -0.3V to (V + 0.3V) DD Operating Temperature Range -40C to +85C Storage Temperature Range -55C to +125C Soldering Temperature (10s) See JEDEC J-STD-020 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 the absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED DC OPERATING CHARACTERISTICS (VDD = 2.5V to 4.5V, T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage VDD (Note 1) +2.5 +4.5 V OVD Voltage (Note 1) -0.3 +4.5 V DQ, PIO Voltage Range (Note 1) -0.3 +5.5 V DC ELECTRICAL CHARACTERISTICS (VDD = 2.5V to 4.5V, T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2.5V VDD 4.2V 65 95 ACTIVE Current I A ACTIVE 105 SLEEP Mode Current I 2.5V VDD 4.2V 1 3 A SLEEP Input Logic High: DQ, PIO V (Note 1) 1.5 V IH Input Logic Low: DQ, PIO V (Note 1) 0.6 V IL Output Logic Low: DQ, PIO V I = 4mA (Note 1) 0.4 V OL OL Pulldown Current: DQ, PIO I V , V = 0.4V 0.2 A PD DQ PIO VDD Input Logic High: OVD V (Note 1) V IH 0.2 Input Logic Low: OVD V (Note 1) VSS + 0.2 V IL VIN Input Resistance R 15 M IN DQ Capacitance C 50 pF DQ DQ SLEEP Timeout t DQ < V (Note 5) 1.5 2.0 2.5 s SLEEP IL Undervoltage SLEEP V (Note 1) 2.40 2.45 2.50 V SLEEP Threshold ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT (V = 2.5V to 4.5V, T = -20C to +70C, unless otherwise noted. Typical values are at T = +25C.) CC A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Temperature Resolution T 0.125 C LSB Temperature Error T 3 C ERR Voltage Resolution V 4.88 mV LSB Voltage Full-Scale V 0 4.992 V FS Voltage Error V 50 mV ERR Current Resolution I 1.56 V LSB 2 of 31