LTC4061 Li-Ion Charger

Linear Technology Corp. of Milpitas, California, has introduced its LTC4061 stand-alone, linear, one-cell lithium-ion battery charger with features to improve charging safety, simplify charge termination and status reporting and prolong battery life.

The LTC4061 can charge a battery from a wall adapter or USB in MP3 players, digital cameras, PDAs and cell phones. It is equipped with a thermistor interface for temperature-qualified charging, an adjustable timer as a backup charge termination, and precision float voltage to prevent overcharging of the cell. To eliminate the risk of overheating while charging at maximum rate, a patented thermal regulation circuit keeps the junction temperature at a safe level, and its SmartStart™ feature prolongs battery life by eliminating unnecessary recharge cycles.

The LTC4061 can charge both 4.2V and the new 4.4V float voltage Li-ion batteries with ±0.5% and ±0.35% accuracy, respectively. At any point in the charge cycle, it can be shut down, limiting battery drain current to less than 2µA. The LTC4061 is offered in a 10-lead, 3mm x 3mm DFN package. Pricing for 1,000 pieces starts at $1.95.

Visit www.linear-tech.com.