DESCRIPTION
The LTC®4155 is a 15 watt I2C controlled power manager with PowerPath™ instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4155 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable Lithium-Ion/Polymer battery and a system load.
FEATURES
High Efficiency Charger Capable of 3.5A Charge Current
Monolithic Switching Regulator Makes Optimal Use of Limited Power and Thermal Budget
Dual-Input Overvoltage Protection Controller
Priority Multiplexing for Multiple Inputs
I2C/SMBus Control and Status Feedback
NTC Thermistor ADC for Temperature Dependent Charge Algorithms (JEITA)
Instant-On Operation with Low Battery
Battery Ideal Diode Controller for Power Management
USB On-The-Go Power Delivery to the USB Port
Full Featured Li-Ion/Polymer Battery Charger with Four Float Voltage Settings
28-Lead 4mm ×5mm QFN Package