LTC3109
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3109

Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $4.72
Features
  • 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
Additional Details
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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
Part Models 8
1ku List Price Starting From $4.72

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3109EGN#PBF
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LTC3109EUF#PBF
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LTC3109EUF#TRPBF
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LTC3109IGN#PBF
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LTC3109IUF#PBF
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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

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LTC3109IGN#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3109EUF#PBF

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LTC3109EUF#TRPBF

PRODUCTION

LTC3109IUF#PBF

PRODUCTION

LTC3109IUF#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Aug 10, 2022

- 22_0177

arrow down

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

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3109EUF#PBF

PRODUCTION

LTC3109EUF#TRPBF

PRODUCTION

LTC3109IUF#PBF

PRODUCTION

LTC3109IUF#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1664A

LTC3109EUF Demo Board | Auto-polarity, Ultralow Voltage Step-Up Converter and Power Manager

Tools & Simulations

Tools & Simulations 1

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.

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