LTC4155 Datasheet | Linear Technology

Dual-Input Power Manager/ 3.5A Li-Ion Battery Charger with I2C Control and USB OTG Features n High Efficiency Charger Capable of 3.5A Charge Current 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 Full Featured Li-Ion/Polymer Battery Charger with Four Float Voltage Settings n 28-Lead 4mm × 5mm QFN Package Applications n Tablet PCs n Ultra Mobile PCs n Video Media Players n Digital Cameras, GPS, PDAs n Smart Phones n Portable Medical 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. Description The LTC®4155 is a 15 watt I2C controlled power manager with Power Path™ instant-on operation, high efficiency switching battery charging and USB patibility. 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. The LTC4155’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 intelligent control decisions. USB On-The-Go...