LTC3553 Datasheet | Linear Technology

Features Micropower USB Power Manager With Li-Ion Charger, LDO and Buck Regulator Description n 12μA Standby Mode Quiescent Current (All Outputs On) n Seamless Transition Between Input Power Sources: Li-Ion/Polymer Battery and USB n 240mΩ Internal Ideal Diode Provides Low Loss Power Path™ n High Efficiency 200m A Buck Regulator n 150m A Low Dropout (LDO) Linear Regulator n Pushbutton On/Off Control With System Reset n Full Featured Li-Ion/Polymer Battery Charger n Programmable Charge Current With Thermal Limiting n Instant-On Operation With Discharged Battery n3mm × 3mm × 0.75mm 20-Pin QFN Package Applications n USB-Based Handheld Products n Portable Li-Ion/Polymer Based Electronic Devices n Wearable Electronics n Low Power Medical Devices The LTC®3553 is a micropower, highly integrated power management and battery charger IC for single-cell Li-Ion/Polymer battery applications. It includes a Power Path manager with automatic load prioritization, a battery charger, an ideal diode and numerous internal protection Features . Designed specifically for USB applications, the LTC3553 power manager automatically limits input current to a maximum of either 100m A or 500m A. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the selected input current limit. The LTC3553 also includes a synchronous buck regulator, a low dropout linear regulator (LDO), and a pushbutton controller. With all supplies enabled in standby mode, the quiescent current drawn from the battery is only 12μA. The LTC3553 is available in a 3mm × 3mm × 0.75mm 20-pin QFN package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Power Path, Hot Swap and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6522118, 6700364, 5481178, 6304066, 6570372, 6580258, 7511390 and other...