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LTC3108 - Ultralow Voltage Step-Up Converter and Power Manager

Features

  • Click Here for LTC3108 Evaluation Kit
  • 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
LTC3108
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Description

The LTC3108 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.

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Packaging

DFN-12, SSOP-16

LTC3108
LTC3108
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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.

Evaluation Kits

Part Number Description Price
DC1582B-A LTC3108EDE Demo Board | Ultralow Voltage Step-Up Converter and Power Manager $150.00
DC1582B-B LTC3108EDE-1 Demo Board | Ultralow Voltage Step-Up Converter and Power Manager $150.00
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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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Simulate

LTSpice IV is a powerful FREE circuit simulator and schematic capture program, providing macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

  • Step 1. If you do not already have a copy of LTSpice IV, click here to download and install LTSpice / SwitcherCAD III

  • Step 2. Once LTSpice is installed, click here for a ready to run demonstration circuit of the LTC3108.

  • Step 3. If LTspice IV does not automatically open after clicking the above link, 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.
For our complete list of hundreds of ready to run demo circuits, visit our LTspice IV Demo Circuits Collection
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