Datasheet Linear Technology LTC3554EUD-2#PBF — 数据表

LTC3554/LTC3554-1/
LTC3554-2/LTC3554-3
Micropower USB Power
Manager with Li-Ion Charger
and Two Step-Down Regulators
Description Features 10ОјA Standby Mode Quiescent Current (All Outputs On)
n Seamless Transition Between Input Power Sources:
Li-Ion/Polymer Battery and USB
n 240mО© Internal Ideal Diode
n Dual High Efficiency Step-Down Switching Regulators
(200mA IOUT) with Adjustable Output Voltages
n Pushbutton On/Off Control with System Reset
n Reset Time: 5 sec (LTC3554/LTC3554-1), 14 sec (LTC3554-2/LTC3554-3)
n Full Featured Li-Ion/Polymer Battery Charger
n Programmable Charge Current with Thermal Limiting
n Instant-On Operation with Discharged Battery
n Battery Float Voltage: 4.2V (LTC3554/LTC3554-2/
LTC3554-3), 4.1V (LTC3554-1)
n 3mm Г— 3mm Г— 0.75mm 20-Lead QFN Package
n Applications n n USB-Based Handheld Products
Portable Li-Ion/Polymer Based Electronic Devices
Fitness Computers
Low Power Medical Devices The LTCВ®3554 family* are micropower, highly integrated …