LTC4156IUFD Datasheet - Linear Technology

DESCRIPTION
The LTC®4156 is a 15 watt I2C controlled power manager with PowerPath™ instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4156 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable lithium iron phosphate battery and a system load.

FEATURES
■ High Efficiency Charger Capable of 3.5A
   Charge Current
■ Charge Control Algorithm Specifically Designed for
   LiFePO4 Batteries (Lithium Iron Phosphate)
■ 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
■ Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V)
■ 28-Lead 4mm × 5mm QFN Package

APPLICATIONS
■ Portable Medical Devices
■ Portable Industrial Devices
■ Backup Devices