LTC3109
Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager
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Overview
Features and Benefits
- Operates from Inputs as Low as ±30mV
- Less Than ±1°C Needed Across TEG to Harvest Energy
- Proprietary Auto-Polarity Architecture
- Complete Energy Harvesting Power Management System
- Selectable VOUT of 2.35V, 3.3V, 4.1V or 5V
- 2.2V, 5mA LDO
- Logic-Controlled Output
- Energy Storage Capability for Operation During Power Interruption
- Power Good Indicator
- Uses Compact Step-up Transformers
- Small, 20-lead (4mm × 4mm) QFN Package or 20-Lead SSOP
Product Details
The LTC3109 is a highly integrated DC/DC converter ideal for harvesting surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators) and thermopiles. Its unique, proprietary autopolarity topology* allows it to operate from input voltages as low as 30mV, regardless of polarity.
Using two compact step-up transformers and external energy storage elements, the LTC3109 provides a complete power management solution for wireless sensing and data acquisition. The 2.2V LDO can power an external microprocessor, while the main output can be programmed to one of four fixed voltages. The power good indicator signals that the main output is within regulation. A second output can be enabled by the host. A storage capacitor (or battery) can also be charged to provide power when the input voltage source is unavailable. Extremely low quiescent current and high efficiency maximizes the harvested energy available for the application.
The LTC3109 is available in a small, thermally enhanced 20-lead (4mm × 4mm) QFN package and a 20-lead SSOP package.
Applications
- Remote Sensor and Radio Power
- HVAC Systems
- Automatic Metering
- Building Automation
- Predictive Maintenance
- Industrial Wireless Sensing
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R551 Reliability Data3/23/2018
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DC1664A - Demo Manual8/25/2010
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Energy Harvesting Now6/27/2011
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LTC3109 Video Product Brief10/15/2018
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Green Buildings Get a Boost: Wireless Sensor Nodes as a Key Application for Energy Harvesting7/1/2020 Thought Leadership
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Frequently Asked Questions: Thermoelectric Energy Harvesting With the LTC3108 & LTC310910/6/2014
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Harvest Energy from a Single Photovoltaic Cell4/1/2011 LT Journal
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC3109
Product Recommendations
LTC3109 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC3109EGN#PBF | Material Declaration | Reliability Data | 20-Lead SSOP (Narrow 0.15 Inch) | |
| LTC3109EGN#TRPBF | Material Declaration | Reliability Data | 20-Lead SSOP (Narrow 0.15 Inch) | |
| LTC3109EUF#PBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | |
| LTC3109EUF#TRPBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | |
| LTC3109IGN#PBF | Material Declaration | Reliability Data | 20-Lead SSOP (Narrow 0.15 Inch) | |
| LTC3109IGN#TRPBF | Material Declaration | Reliability Data | 20-Lead SSOP (Narrow 0.15 Inch) | |
| LTC3109IUF#PBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | |
| LTC3109IUF#TRPBF | Material Declaration | Reliability Data | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | |
| Wafer Fabrication Data | R551 Reliability Data |
PCN-PDN Information
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Support & Discussions
LTC3109 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
(*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.