LTC3106 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6µA Quiescent Current FeaTuresDescripTion 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 1.6µA 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 VOUT and VSTORE 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: 1.6μA mary cell batteries and can trickle charge a backup battery n Regulated Output with VIN or VSTORE Above, Below 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, VSTORE, are programmed digitally, 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 Available in Thermally Enhanced 3mm × 4mm 16-Pin Additional features include an accurate turn-on voltage, a QFN and 20-Pin TSSOP Packages power good indicator for VOUT, a user selectable 100mA peak current limit setting for lower power applications, applicaTions thermal shutdown as well as user selectable backup power n and output voltages. Wireless Sensor Networks n Home or Office Building Automation L, LT, LTC, LTM, Linear Technology, the Linear logo, Eterna and Burst Mode are registered 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 n Remote Sensors 7432695 and 6366066. Typical applicaTionEfficiency vs Input VoltageSolar Cell Input with Primary Battery Backup 100 110 IOUT = 50mA 10µH 95 100 90 90 SW1 SW2 85 80 POWER LOSS (mW) 3.6V + VSTORE VAUX 80 TL-5955 10µF V 70 CAP 2.2µF 75 V PRIMARY ENVSTR IN EFF. V 60 BATTERY RUN 70 IN P.L. VSTR EFF. 50 V 3.3V 65 IN VOUT 50mA VSTR P.L. 40 600mV TO 5V + EFFICIENCY (%) 470µF 1µF LTC3106 1M 47µF 60 PV CELLS 55 30 PGOOD PGOOD 50 20 V MPP VCC CC 45 10 PRI ILIMSEL 0.01µF GND 40 0 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 For more information www.linear.com/LTC3106 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
