LTC3107 Ultra-Low Voltage Energy Harvester and Primary Battery Life Extender Fea T Descrip T n Thermal Energy Harvesting Assisted Power The LTC 3107 is a highly integrated DC/DC converter de- Management System signed to extend the life of a primary battery in low power n V Tracks the Primary Battery Voltage wireless systems by harvesting and managing surplus en- OUT n 2.2V LDO Output ergy from extremely low input voltage sources such as TEGs n Reserve Energy Output, Clamped to 4.3V (Thermoelectric Generators) and thermopiles. The step-up n Operates from Inputs as Low as 20mV topology operates from input voltages as low as 20mV. n Battery In-Use Indicator (BAT OFF) Using a small step-up transformer, the LTC3107 n I from Battery: Q provides a complete power management solution for n 80nA When Energy Harvesting typical wireless sensor applications that operate from a n 6A No Energy Harvesting primary battery. The 2.2V LDO can be used to power an n Standard, Compact Step-Up Transformer external microprocessor, while the main output voltage n Small, Thermally Enhanced 10-lead (3mm 3mm) automatically adapts to match the voltage of the primary DFN package battery. The LTC3107 seamlessly transitions from battery power to harvested power whenever harvested energy is a T available, extending the life of the battery. The BAT OFF n Industrial Wireless Sensing indicator can be used to track battery usage. An optional n Remote Sensor and Radio power storage capacitor accumulates excess harvested energy, n HVAC further extending battery life. n Automatic Metering The LTC3107 is available in a small, thermally enhanced n Building Automation, Security 10-lead (3mm 3mm) DFN package. n Predictive Maintenance, Condition Monitoring L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T Percentage of Added Battery Life vs TEG Surface Temperature TEG Powered Thermal Harvester with Primary Cell Life Extender 100000 T1 1nF T = 23C A V IN 1:100 C1 V BAT 10000 10F 3.6V THERMOELECTRIC LTC3107 330pF GENERATOR C2 BAT OFF 1000 3.6V V V SW OUT OUT + 100 C OUT CUI CP20151 TEG GND VLDO VLDO 242422mm HEATSINK NATURAL CONVECTION 2.2F 10 0.5Hz X RATE (227W AVG) VAUX VSTORE MT 1Hz X RATE (437W AVG) MT + CSTORE 2Hz X RATE (679W AVG) MT 10F 1 (OPTIONAL) 25 30 35 40 45 50 SURFACE TEMPERATURE (C) 3107 TA01a 3107 TA01 3107f 1 For more information www.linear.com/LTC3107 BATTERY LIFE EXTENSION (%) ion pplica ions pplica ion uresLTC3107 a T e Maxi Mu M r a T p c F T (Note 1) TOP VIEW SW Voltage ................................................. 0.3V to 2V C1 Voltage (Note 5) ......................0.3V to (VAUX+0.6V) VAUX 1 10 SW C2 Voltage (Note 5) ......................................... 8V to 8V VSTORE 2 9 C2 11 VAUX .....................................................15mA into VAUX V 3 8 C1 OUT GND V 4 7 BAT OFF BAT V , VSTORE ........................................... 0.3V to 4.5V BAT VLDO 5 6 GND V , BAT OFF .......................................... 0.3V to 4.5V OUT VLDO ........................................................ 0.3V to 4.5V DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN Operating Junction Temperature Range T = 125C, = 43C/W, = 5.5C/W JMAX JA JC (Note 2) ............................................. 40C to 125C EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB (Note 4) Storage Temperature Range .................. 65C to 150C o r D i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3107EDD PBF LTC3107EDD TRPBF LGMD 40C to 125C 10-Lead (3mm 3mm) Plastic DFN LTC3107IDD PBF LTC3107IDD TRPBF LGMD 10-Lead (3mm 3mm) Plastic DFN 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: