LTC4150
Coulomb Counter/
Battery Gas Gauge
FEATURES DESCRIPTION n The LTC®4150 measures battery depletion and charging
in handheld PC and portable product applications. The
device monitors current through an external sense resistor
between the battery’s positive terminal and the battery’s
load or charger. A voltage-to-frequency converter transforms the current sense voltage into a series of output
pulses at the interrupt pin. These pulses correspond to a
fixed quantity of charge flowing into or out of the battery.
The part also indicates charge polarity as the battery is
depleted or charged. n Indicates Charge Quantity and Polarity
±50mV Sense Voltage Range
Precision Timer Capacitor or Crystal Not Required
2.7V to 8.5V Operation
High Side Sense
32.55Hz/V Charge Count Frequency
1.5μA Shutdown Current
10-Pin MSOP Package APPLICATIONS n The LTC4150 is intended for 1-cell or 2-cell Li-Ion and
3-cell to 6-cell NiCd or NiMH applications. Battery Chargers
Palmtop Computers and PDAs
Cellular Telephones and Wireless Modems L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode are registered trademarks and
ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks …