Datasheet LTC3107 (Analog Devices)

LTC3107 Ultra-Low Voltage Energy Harvester and Primary Battery Life Extender
FeaTures DescripTion
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
VOUT Tracks the Primary Battery Voltage
wireless systems by harvesting and managing surplus en- 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
IQ from Battery:
provides a complete power management solution for n
80nA When Energy Harvesting
typical wireless sensor applications that operate from a n
6µA 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
applicaTions
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 applicaTion Percentage of Added Battery Life TEG Powered Thermal Harvester with Primary Cell Life Extender vs TEG Surface Temperature
T1 1nF 100000 T V A = 23°C IN 1:100 C1 VBAT 10µF 3.6V 10000 THERMOELECTRIC LTC3107 GENERATOR 330pF C2 BAT_OFF 1000 3.6V SW VOUT VOUT +C 100 OUT Y LIFE EXTENSION (%) CUI CP20151 TEG GND VLDO VLDO 24×24×22mm HEATSINK TTER 2.2µF NATURAL CONVECTION VAUX VSTORE BA 10 0.5Hz XMT RATE (227µW AVG) + 1Hz XMT RATE (437µW AVG) CSTORE 2Hz X 10µF MT RATE (679µW AVG) (OPTIONAL) 125 30 35 40 45 50 SURFACE TEMPERATURE (°C) 3107 TA01a 3107 TA01 3107f For more information www.linear.com/LTC3107 1 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts