LTC4150 Coulomb Counter/ Battery Gas Gauge FEATURES DESCRIPTION n Indicates Charge Quantity and Polarity The LTC 4150 measures battery depletion and charging n 50mV Sense Voltage Range in handheld PC and portable product applications. The n Precision Timer Capacitor or Crystal Not Required device monitors current through an external sense resistor n 2.7V to 8.5V Operation between the batterys positive terminal and the batterys n High Side Sense load or charger. A voltage-to-frequency converter trans- n 32.55Hz/V Charge Count Frequency forms the current sense voltage into a series of output n 1.5A Shutdown Current pulses at the interrupt pin. These pulses correspond to a n 10-Pin MSOP Package xed quantity of charge owing into or out of the battery. The part also indicates charge polarity as the battery is depleted or charged. APPLICATIONS The LTC4150 is intended for 1-cell or 2-cell Li-Ion and n Battery Chargers 3-cell to 6-cell NiCd or NiMH applications. n Palmtop Computers and PDAs L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode are registered trademarks and n Cellular Telephones and Wireless Modems ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Integral Nonlinearity, % of Full Scale 0.5 0.4 CHARGER R SENSE LOAD 0.3 + 0.2 4.7F 0.1 R R L L + 0 SENSE SENSE V DD + 0.1 C INT F 4.7F 0.2 LTC4150 CLR P CHG C F DISCHG POL 0.3 SHDN GND 0.4 0.5 4150 TA01a 50 25 0 25 50 CURRENT SENSE VOLTAGE (mV) 4150 TA01b 4150fc 1 ERROR (% FULL SCALE)LTC4150 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Supply Voltage (V ) .................................. 0.3V to 9V DD Input Voltage Range TOP VIEW Digital Inputs (CLR, SHDN) ........0.3V to (V + 0.3) DD + SENSE 1 10 INT + + SENSE , SENSE , C , C .........0.3V to (V + 0.3) SENSE 2 9 CLR F F DD + C 3 8 V F DD Output Voltage Range C 4 7 GND F SHDN 5 6 POL Digital Outputs (INT, POL) ....................... 0.3V to 9V MS PACKAGE Operating Temperature Range 10-LEAD PLASTIC MSOP LTC4150CMS ........................................... 0C to 70C T = 125C, = 160C/W JMAX JA LTC4150IMS .......................................40C TO 85C Storage Temperature Range ................... 65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4150CMS PBF LTC4150CMS TRPBF LTQW 10-Lead Plastic MSOP 0C to 70C LTC4150IMS PBF LTC4150IMS TRPBF LTQW 10-Lead Plastic MSOP 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: