Datasheet Linear Technology LTC3577EUFF-3#PBF — Ficha de datos

LTC3577-3/LTC3577-4
Highly Integrated
Portable Product PMIC
Description Features Full Featured Li-Ion/Polymer Charger/PowerPathв„ў
Controller with Instant-On Operatio Triple Adjustable High Efficiency Step-Down
Switching Regulators (800mA, 500mA, 500mA IOUT)
n I2C Adjustable SW Slew Rates for EMI Reductio High Temperature Battery Voltage Reduction
Improves Safety and Reliability
n Overvoltage Protection Controller for USB (V
BUS)/Wall
Inputs Provide Protection to 30V
n Integrated 40V Series LED Back Light Driver with 60dB
Brightness Control and Gradation via I2C
n 1.5A Maximum Charge Current with Thermal Limiting
n Battery Float Voltage: 4.2V (LTC3577-3) 4.1V (LTC3577-4)
n Pushbutton ON/OFF Control with System Reset
n Dual 150mA Current Limited LDOs
n Start-Up Timing Compatible with SiRF Atlas IV
Processor
n Small 4mm Г— 7mm 44-Pin QFN Package
n Applications PNDs, DMB/DVB-H, Digital/Satellite Radio,
Media Players
n Portable Industrial/Medical Products …