LTC3107 - Ultra-Low Voltage Energy Harvester and Primary Battery Life Extender


  • Thermal Energy Harvesting Assisted Power Management System
  • VOUT Tracks the Primary Battery Voltage
  • 2.2V LDO Output
  • Reserve Energy Output, Clamped to 4.3V
  • Operates from Inputs as Low as 20mV
  • Battery In-Use Indicator (BAT_OFF)
  • IQ from Battery:
    80nA When Energy Harvesting

    6μA No Energy Harvesting
  • Standard, Compact Step-Up Transformer
  • Small, Thermally Enhanced 10-lead (3mm × 3mm) DFN package

Typical Application

LTC3107 Typical Application
LTC3107 Typical Application


The LTC®3107 is a highly integrated DC/DC converter designed to extend the life of a primary battery in low power wireless systems by harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (Thermoelectric Generators) and thermopiles. The step-up topology operates from input voltages as low as 20mV.

Using a small step-up transformer, the LTC3107 provides a complete power management solution for typical wireless sensor applications that operate from a primary battery. The 2.2V LDO can be used to power an external microprocessor, while the main output voltage automatically adapts to match the voltage of the primary battery. The LTC3107 seamlessly transitions from battery power to harvested power whenever harvested energy is available, extending the life of the battery. The BAT_OFF indicator can be used to track battery usage. An optional storage capacitor accumulates excess harvested energy, further extending battery life.

The LTC3107 is available in a small, thermally enhanced 10-lead (3mm × 3mm) DFN package.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC3107EDD#PBF 3x3 DFN-10 DD E 05-08-1699 Yes
LTC3107EDD#TRPBF 3x3 DFN-10 DD E 05-08-1699 Yes
LTC3107IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC3107IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes

LTC3107 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC3107EDD#PBF 3x3 DFN-10 E $4.22 $2.95 Yes
LTC3107EDD#TRPBF 3x3 DFN-10 E $3.01 Yes
LTC3107IDD#PBF 3x3 DFN-10 I $4.93 $3.45 Yes
LTC3107IDD#TRPBF 3x3 DFN-10 I $3.51 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2103A LTC3107 Demo Board | 20mV start-up Energy Harvester and Battery Life Extender $175.00
DC2321A Dust Energy Harvesting Demo Board with E-Ink Display, designed to connect to the DC2344A or DC2509A $150.00
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Companion Boards

Part Number Description Price Documentation
DC2274A-A SmartMesh IP USB Network Manager, 100 mote capacity $125.00
DC2344A Gleanergy Multi-Source Energy Harvesting Demo Board with Battery Chargers and Life-Extenders for Use with DC2321A Dust Demo Board Contact Factory
DC2509A Gleanergy Multi-Source E H Demo Board with Battery Chargers and Life-Extenders for Use with DC2321A Dust Demo Board $175.00
DC2510A Shield Board for use with DC2321A Dust Demo Board $75.00
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Click here to view our complete list of demo boards


  • Industrial Wireless Sensing
  • Remote Sensor and Radio power
  • HVAC
  • Automatic Metering
  • Building Automation, Security
  • Predictive Maintenance, Condition Monitoring

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