LTC3108 - Ultralow Voltage Step-Up Converter and Power Manager

Features

  • Operates from Inputs of 20mV
  • Complete Energy Harvesting Power
  • Management System
    - Selectable VOUT of 2.35V, 3.3V, 4.1V or 5V
    - LDO: 2.2V at 3mA
    - Logic Controlled Output
    - Reserve Energy Output
  • Power Good Indicator
  • Uses Compact Step-Up Transformers
  • Small 12-Lead (3mm × 4mm) DFN or 16-Lead SSOP Packages

Typical Application

LTC3108 Typical Application
LTC3108 Typical Application

Description

The LTC®3108 is a highly integrated DC/DC converter ideal for harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators), thermopiles and small solar cells. The step-up topology operates from input voltages as low as 20mV. The LTC3108 is functionally equivalent to the LTC3108-1 except for its unique fixed VOUT options.

Using a small step-up transformer, the LTC3108 provides a complete power management solution for wireless sensing and data acquisition. The 2.2V LDO powers an external microprocessor, while the main output is programmed to one of four fixed voltages to power a wireless transmitter or sensors. The power good indicator signals that the main output voltage is within regulation. A second output can be enabled by the host. A storage capacitor provides power when the input voltage source is unavailable. Extremely low quiescent current and high efficiency design ensure the fastest possible charge times of the output reservoir capacitor.

The LTC3108 is available in a small, thermally enhanced 12-lead (3mm × 4mm) DFN package and a 16-lead SSOP package.

Packaging

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

4x3 DFN-12, SSOP-16

LTC3108 Package Drawing
LTC3108 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3108EDE#PBF DFN 12 E $4.22 $2.95 View
LTC3108EDE#TRPBF DFN 12 E $3.01 View
LTC3108EDE-1#PBF DFN 12 E $4.22 $2.95 View
LTC3108EDE-1#TRPBF DFN 12 E $3.01 View
LTC3108EGN#PBF SSOP 16 E $4.22 $2.95 View
LTC3108EGN#TRPBF SSOP 16 E $3.01 View
LTC3108EGN-1#PBF SSOP 16 E $4.22 $2.95 View
LTC3108EGN-1#TRPBF SSOP 16 E $3.01 View
LTC3108IDE#PBF DFN 12 I $4.93 $3.45 View
LTC3108IDE#TRPBF DFN 12 I $3.51 View
LTC3108IDE-1#PBF DFN 12 I $4.93 $3.45 View
LTC3108IDE-1#TRPBF DFN 12 I $3.51 View
LTC3108IGN#PBF SSOP 16 I $4.93 $3.45 View
LTC3108IGN#TRPBF SSOP 16 I $3.51 View
LTC3108IGN-1#PBF SSOP 16 I $4.93 $3.45 View
LTC3108IGN-1#TRPBF SSOP 16 I $3.51 View
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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
DC1582B-A LTC3108EDE Demo Board | Ultralow Voltage Step-Up Converter and Power Manager $150.00
DC2042A ENERGY HARVESTING (EH) MULTI-SOURCE DEMOBOARD $200.00
DC2080A Energy Harvesting (EH) Multi-Source Demo Board with Transducers Contact Factory
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Click here to view our complete list of demo boards

Applications

  • Remote Sensors and Radio Power
  • Surplus Heat Energy Harvesting
  • HVAC Systems
  • Industrial Wireless Sensing
  • Automatic Metering
  • Building Automation
  • Predictive Maintenance

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Design Tools

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTC3108
LTC3108-1

Technical Support