LTC2941IDCB-1#TRMPBF Analog Devices

LTC2941-1 2 1A I C Battery Gas Gauge with Internal Sense Resistor Fae Tseru Dpircse Tnoi n Indicates Accumulated Battery Charge and The LTC 2941-1 measures battery charge state in battery- Discharge powered handheld PC and portable product applications. 2 n SMBus/I C Interface Its operating range is perfectly suited for single cell Li-Ion n Integrated 50m High Side Sense Resistor batteries. A precision coulomb counter integrates current n 1A Sense Current Range through an internal sense resistor between the batterys n High Accuracy Analog Integration positive terminal and the load or charger. The measured 2 n 1% Charge Accuracy charge is stored in internal registers. An SMBus/I C in- n Configurable Alert Output/Charge Complete Input terface accesses and configures the device. n 2.7V to 5.5V Operating Range The LTC2941-1 features programmable high and low n Quiescent Current Less than 100A thresholds for accumulated charge. If a threshold is ex- n Small 6-Pin 2mm 3mm DFN package ceeded, the device communicates an alert using either the SMBus alert protocol or by setting a flag in the internal status register. a acilpp Tsnoi L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot n Swap, ThinSOT and Bat-Track are trademarks of Linear Technology Corporation. All other Low Power Handheld Products trademarks are the property of their respective owners. n Cellular Phones n MP3 Player n Cameras n GPS T lacipy a acilpp Tnoi Total Charge Error vs Sense Current 1.00 CHARGER LOAD V + = 3.6V SENSE 0.75 + SENSE 0.1F LTC2941-1 0.50 AL/CC 0.25 2 I C/SMBus SDA SENSE TO HOST + 1-CELL 0 SCL Li-Ion 29411 TA01a 0.25 GND 0.50 0.75 1.00 1 10 100 1000 |I | (mA) SENSE 29411 TA01b 29411f  CHARGE ERROR (%)LTC2941-1 a ulosb T e m mumixa r a Tsgni p ni c no Farugi Tnoi (Notes 1, 2) + TOP VIEW Supply Voltage (SENSE ) ............................. 0.3V to 6V SCL, SDA, AL/CC ......................................... 0.3V to 6V + SENSE 1 6 SENSE Sense Current (into SENSE ) ....................................2A GND 5 AL/CC 2 7 Operating Ambient Temperature Range SCL 4 SDA 3 LTC2941-1C ............................................. 0C to 70C LTC2941-1I .......................................... 40C to 85C DCB PACKAGE 6-LEAD (2mm s 3mm) PLASTIC DFN Storage Temperature Range ..................... 65C to 150 T = 150C, = 160C/W (NOTE 8) JMAX JA EXPOSED PAD (PIN 7): DO NOT CONNECT o r D re i n Famro Tnoi Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2941CDCB-1#TRMPBF LTC2941CDCB-1#TRPBF LFKP 6-Lead (2mm 3mm) Plastic DFN 0C to 70C LTC2941IDCB-1#TRMPBF LTC2941IDCB-1#TRPBF LFKP 6-Lead (2mm 3mm) Plastic DFN 40C to 85C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: