LTC4156 Datasheet | Linear Technology

Dual-Input Power Manager/ w3.i5th AI2LCi Fe CPo On4tr Boal tatenrdy Charger USB OTG Features Description n High Efficiency Charger Capable of 3.5A Charge Current n Charge Control Algorithm Specifically Designed for Li Fe PO4 Batteries (Lithium Iron Phosphate) n Monolithic Switching Regulator Makes Optimal Use of Limited Power and Thermal Budget n Dual Input Overvoltage Protection Controller n Priority Multiplexing for Multiple Inputs n I2C/SMBus Control and Status Feedback n NTC Thermistor ADC for Temperature Dependent Charge Algorithms (JEITA) n Instant-On Operation with Low Battery n Battery Ideal Diode Controller for Power Management n USB On-The-Go Power Delivery to the USB Port n Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V) n28-Lead 4mm × 5mm QFN Package Applications n Portable Medical Devices n Portable Industrial Devices n Backup Devices L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Power Path and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. The LTC®4156 is a 15 watt I2C controlled power manager with Power Path™ instant-on operation, high efficiency switching battery charging and USB patibility. 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. The LTC4156’s switching battery charger automatically limits its input current for USB patibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications. I2C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. I2C status reporting of key system and charge parameters facilitates...