LTC3553 micropower USB manager

Linear Technology introduces the LTC3553 which is a micropower USB manager with integrated Li-Ion/Polymer single cell charger and buck regulator . LTC3553 is specially designed for USB applications .

LTC3553 power manager automatically limits input current to a maximum of either 100mA or 500mA.

The LTC3553 also includes a synchronous buck regulator, a low dropout linear regulator (LDO) and a pushbutton controller.

Main features of the LTC3553 micropower USB manager are :  12μA Standby Mode Quiescent Current (All Outputs On) ,  Seamless Transition Between Input Power Sources: Li-Ion/Polymer Battery and USB , 240mΩ Internal Ideal Diode Provides Low Loss , High Effi ciency 200mA Buck Regulator , 150mA Low Dropout (LDO) Linear Regulator , Pushbutton On/Off Control With System Reset , Full Featured Li-Ion/Polymer Battery Charger , Programmable Charge Current With Thermal Limiting , Instant-On Operation With Discharged Battery .

LTC3553 micropower USB manager is very easy to use in any USB application and require few external components.