POWER LOSS (mW) LTC3106 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6A Quiescent Current Fea T Descrip T n Dual Input Buck-Boost with Integrated PowerPath The LTC 3106 is a highly integrated, ultralow voltage buck- Manager boost DC/DC converter with automatic PowerPath man- n Ultralow Start-Up Voltages: 850mV Start with No agement optimized for multisource, low power systems. Backup Source, 300mV with a Backup Source At no load, the LTC3106 draws only 1.6A while creating n Compatible with Primary or Rechargeable Backup an output voltage up to 5V from either input source. Batteries If the primary power source is unavailable, the LTC3106 n Digitally Selectable V and V OUT STORE seamlessly switches to the backup power source. The n Maximum Power Point Control LTC3106 is compatible with either rechargeable or pri- n Ultralow Quiescent Current: 1.6A mary cell batteries and can trickle charge a backup battery n Regulated Output with V or V Above, Below IN STORE whenever there is an energy surplus available. Optional or Equal to the Output maximum power point control ensures power transfer is n Optional Backup Battery Trickle Charger optimized between power source and load. The output volt- n Shelf Mode Disconnect Function to Preserve Battery age and backup voltage, V , are programmed digitally, STORE Shelf Life reducing the required number of external components. n Burst Mode Operation Zero power Shelf Mode ensures that the backup battery n Accurate RUN Pin Threshold will remain charged if left connected to the LTC3106 for n Power Good Output Voltage Indicator an extended time. n Selectable Peak Current Limit: 90mA/650mA n Additional features include an accurate turn-on voltage, a Available in Thermally Enhanced 3mm 4mm 16-Pin power good indicator for V , a user selectable 100mA QFN and 20-Pin TSSOP Packages OUT peak current limit setting for lower power applications, a T thermal shutdown as well as user selectable backup power and output voltages. n Wireless Sensor Networks n L, LT, LTC, LTM, Linear Technology, the Linear logo, Eterna and Burst Mode are registered Home or Office Building Automation trademarks and PowerPath is a trademark of Linear Technology Corporation. All other n Energy Harvesting trademarks are the property of their respective owners. Protected by U.S. Patents, including 7432695 and 6366066. n Remote Sensors Typical a T Efficiency vs Input Voltage Solar Cell Input with Primary Battery Backup 100 110 I = 50mA OUT 10H 95 100 90 90 85 SW1 SW2 80 3.6V V V 80 STORE AUX 70 + 10F 2.2F TL-5955 V CAP 75 V EFF. IN PRIMARY ENVSTR 60 V P.L. IN 70 RUN BATTERY V EFF. 50 STR 3.3V 65 V V V P.L. IN OUT STR 50mA 40 600mV TO 5V 60 + 47F LTC3106 470F 1M 1F PV CELLS 30 55 PGOOD PGOOD 20 50 V MPP CC V CC 10 45 ILIMSEL PRI 40 0 GND 0.01F 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 3106 TA01a INPUT VOLTAGE (V) LTC3106 TA01b 3106f 1 For more information www.linear.com/LTC3106 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3106 a T e Maxi Mu M r a T (Notes 1, 6) Supply Voltages Storage Temperature Range .................. 65C to 150C V , V , V , V ........................... 0.3V to 6V Lead Temperature (Soldering, 10 sec) IN STORE OUT CAP All Other Pins ............................................... 0.3V to 6V FE Package .......................................................300C Operating Junction Temperature Range (Notes 2, 3) ............................................ 40C to 125C p c F T TOP VIEW TOP VIEW V 1 20 SW1 STORE 20 19 18 17 V 2 19 SW2 CAP V 3 18 V OUT IN NC 1 16 V IN NC 4 17 GND V 2 15 GND OUT V 3 14 ENVSTR V 5 16 ENVSTR AUX AUX 21 21 GND GND V 4 13 RUN V 6 15 RUN CC CC OS1 5 12 ILIMSEL OS1 7 14 ILIMSEL OS2 6 11 PRI OS2 8 13 PRI 7 8 9 10 PGOOD 9 12 SS1 MPP 10 11 SS2 FE PACKAGE UDC PACKAGE 20-LEAD PLASTIC TSSOP 20-LEAD (3mm 4mm) PLASTIC QFN T = 125C, = 48.6C/W, = 8.6C/W (Note 5) JMAX JA JC T = 125C, = 52C/W, = 7C/W (Note 5) JMAX JA JC EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3106EUDC PBF LTC3106EUDC TRPBF LGQH 20-Lead (3mm 4mm) Plastic QFN 40C to 125C LTC3106IUDC PBF LTC3106IUDC TRPBF LGQH 20-Lead (3mm 4mm) Plastic QFN 40C to 125C LTC3106EFE PBF LTC3106EFE TRPBF LTC3106FE 20-Lead Plastic TSSOP 40C to 125C LTC3106IFE PBF LTC3106IFE TRPBF LTC3106FE 20-Lead Plastic TSSOP 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container For more information on lead free part marking, go to: