The LTC4069-4.4 is a complete constant-current/ constant-voltage linear charger for high capacity single-cell lithium-ion batteries with a 4.4V float voltage. The 2mm x 2mm DFN package and low external component count make the LTC4069-4.4 especially well-suited for portable applications. Furthermore, LTC4069-4.4 is specifically designed to work within USB power specifications. The CHRG pin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications.