LTC3109
RECOMMENDED FOR NEW DESIGNSAuto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager
- Part Models
- 8
- 1ku List Price
- Starting From $5.98
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Video 1
Product Selector Card 2
Brochure 1
Thought Leadership 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3109EGN#PBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3109EGN#TRPBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3109EUF#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3109EUF#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3109IGN#PBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3109IGN#TRPBF | 20-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC3109IUF#PBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3109IUF#TRPBF | 20-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 10, 2022 - 22_0177 Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL |
||
| LTC3109EGN#PBF | PRODUCTION | |
| LTC3109EGN#TRPBF | PRODUCTION | |
| LTC3109IGN#PBF | PRODUCTION | |
| LTC3109IGN#TRPBF | PRODUCTION | |
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3109EUF#PBF | PRODUCTION | |
| LTC3109EUF#TRPBF | PRODUCTION | |
| LTC3109IUF#PBF | PRODUCTION | |
| LTC3109IUF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3109
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.
Evaluation Kits
LTC3109EUF Demo Board | Auto-polarity, Ultralow Voltage Step-Up Converter and Power Manager