LTC4155 Dual-Input Power Manager/ 3.5A Li-Ion Battery Charger with 2 I C Control and USB OTG Fea T Descrip T 2 n High Efficiency Charger Capable of 3.5A The LTC 4155 is a 15 watt I C controlled power manager Charge Current with PowerPath instant-on operation, high efficiency n Monolithic Switching Regulator Makes Optimal switching battery charging and USB compatibility. The Use of Limited Power and Thermal Budget LTC4155 seamlessly manages power distribution from n Dual-Input Overvoltage Protection Controller two 5V sources, such as a USB port and a wall adapter, n Priority Multiplexing for Multiple Inputs to a single-cell rechargeable Lithium-Ion/Polymer battery 2 n I C/SMBus Control and Status Feedback and a system load. n NTC Thermistor ADC for Temperature Dependent The LTC4155s switching battery charger automatically Charge Algorithms (JEITA) limits its input current for USB compatibility, or may n Instant-On Operation with Low Battery draw up to 3A from a high power wall adapter. The high n Battery Ideal Diode Controller for Power efficiency step-down switching charger is designed to Management provide maximum power to the application and reduced n USB On-The-Go Power Delivery to the USB Port heat in high power density applications. n Full Featured Li-Ion/Polymer Battery Charger with 2 I C adjustability of input current, charge current, battery Four Float Voltage Settings n float voltage, charge termination, and many other param- 28-Lead 4mm 5mm QFN Package 2 eters allows maximum flexibility. I C status reporting of a T key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V n Tablet PCs power back to the USB port without any additional com- n Ultra Mobile PCs ponents. A dual-input, priority multiplexing, overvoltage n Video Media Players protection circuit guards the LTC4155 from high voltage n Digital Cameras, GPS, PDAs damage on the V pin. n BUS Smart Phones n Portable Medical Devices The LTC4155 is available in the low profile (0.75mm) L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and 28-lead 4mm 5mm QFN surface mount package. PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T Switching Regulator Efficiency 2 I C Controlled High Power Battery Charger/USB Power Manager 100 90 1H TO WALLSNS SW SYSTEM 80 WALLGT LOAD V OUT 70 60 CHGSNS V V IN BUS 50 10F BATGATE 22F LTC4155 40 USBGT BATSNS 3.6k 100k 30 USBSNS NTCBIAS ID NTC 20 3 2 I C IRQ GND CLPROG2 CLPROG1 PROG V OVGCAP C 10 V = 3.9V BAT 0 499 1.21k 47nF 0 1.0 1.5 2.0 2.5 3.0 3.5 0.5 LOAD CURRENT (A) 4155 TA01b 4155 TA01a 4155fd For more information www.linear.com/LTC4155 1 EFFICIENCY (%) ion pplica ions pplica ion uresLTC4155 Table o F c T Ts Features ............................................................................................................................ 1 Applications ....................................................................................................................... 1 Typical Application ............................................................................................................... 1 Description......................................................................................................................... 1 Absolute Maximum Ratings ..................................................................................................... 3 Order Information ................................................................................................................. 3 Pin Configuration ................................................................................................................. 3 Electrical Characteristics ........................................................................................................ 4 Typical Performance Characteristics .......................................................................................... 9 Pin Functions .....................................................................................................................12 Block Diagram ....................................................................................................................15 Timing Diagrams ................................................................................................................16 Operation..........................................................................................................................17 2 I C ........................................................................................................................................................................ 17 Applications Information .......................................................................................................40 Typical Applications .............................................................................................................47 Package Description ............................................................................................................51 Typical Application ..............................................................................................................52 Related Parts .....................................................................................................................52 4155fd 2 For more information www.linear.com/LTC4155 en on