IT4054

IT4054 Standalone Linear Li-lon Battery Charger With Thermal Regulation in ThinSOT Description IT4054 is a complete constant-current & Constant voltage linear charge for single cellLithium-ion and Lithium-Polymer batteries. Its Make IT4054 ideally suited Applications. Furthermore. for portable Features ● Programmable Charge Current Up to 800mA. ● No MOSFET,Sense Resistor or Blocking Diode Required. ● Constant-Current/Constant-Voltage Operation with Thermal Protection to Maximize Charge Rate without Risk of Overheating. ● Charges Single Cell Li-lon Batteries Directly from USB Port. ● Preset 4.2V Charge Voltage with ±1% Accuracy. ● 25uA Supply Current in Shutdown ● 2.9V Trickle Charge Threshold ● Available Without Trickle Charge ● Soft-Start Limits Inrush Current ● Available in 5-Lead SOT-23 Package The IT4054 is Specifically designed to work within USB Power sprcification. At the same time, IT4054 Can also be used in the standalone lithium - Ion And Lithium-polymer battery charger. No external sense resistor is needed, and No Blocking diode is required due to the Internal MOSFET architecture. Thermal feedback Regulates the charge current to limit the dieTemperature during high power operation or High ambient temperature. The charge voltage Is fixed at 4.2V, and the charge current can be programmed externally with a single resistor .The IT4054 automatically thrminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage ...