LTC3108

RECOMMENDED FOR NEW DESIGNS

Ultralow Voltage Step-Up Converter and Power Manager

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.54

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Part Details

Operates from Inputs of 20mV
Complete Energy Harvesting Power Management System
- Selectable V_OUT 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

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 V_OUT 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.


	Output Voltage (Switcher)
LTC3108	Selectable 2.35V, 3.3V, 4.1V or 5V
LTC3108-1	Selectable 2.5V, 3V, 3.7V or 4.5V

Applications

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

Part Models: 8
1ku List Price: Starting From $3.54

Documentation

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
LTC3108EDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108EDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108IDE#PBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108IDE#TRPBF	12-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3108IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC3108EGN#PBF	PRODUCTION
LTC3108EGN#TRPBF	PRODUCTION
LTC3108IGN#PBF	PRODUCTION
LTC3108IGN#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC3108EGN#PBF	PRODUCTION
LTC3108EGN#TRPBF	PRODUCTION
LTC3108IGN#PBF	PRODUCTION
LTC3108IGN#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LTC3108EGN#PBF	PRODUCTION
LTC3108EGN#TRPBF	PRODUCTION
LTC3108IGN#PBF	PRODUCTION
LTC3108IGN#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Single-Supply Monitors 1
LTC2935	PRODUCTION	Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC3108
LTC3108-1

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.

Evaluation Kits

Energy Harvesting (EH) Multi-Source Demo Board

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Product Details

DC2042A - Demo Board for:
LTC3588-1 Piezoelectric Energy Harvesting Power Supply
LTC3108 Ultralow Voltage Step-Up Converter and Power Manager
LTC3105 400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up
LTC3459 10V Micropower Synchronous Boost Converter in ThinSOT
LTC2935 Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

Resources

DC2042A - Demo Manual
1.00M

DC2042A - Schematic
121.00K

DC2042A - Design Files
1.00M

LTC3108EDE Demo Board | Ultralow Voltage Step-Up Converter and Power Manager

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Product Details

DC1582B-A: Demo Board for the LTC3108 Ultralow Voltage Step-Up Converter and Power Manager.

Resources

DC1582B - Design Files
711.00K

DC1582B - Schematic
42.00K

DC1582B - Demo Manual
333.00K

Energy Harvesting (EH) Multi-Source Demo Board with Transducers

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Product Details

The DC2080 is a versatile energy harvesting demo board that is capable of accepting piezoelectric, solar, 4mA to 20mA loops, thermal powered energy sources or any high impedance AC or DC source. The board contains four independent circuits consisting of the following EH ICs:

LTC3588-1: Piezoelectric Energy Harvesting Power Supply
LTC3108: Ultralow Voltage Step-Up Converter and Power Manager
LTC3105: Step-Up DC/DC Converter with Power Point Control and LDO Regulator
LTC3459: 10V Micropower Synchronous Boost Converter
LTC2935-2 and LTC2935-4: Ultralow Power Supervisor with Power-Fail Output Selectable Thresholds

The board is designed to connect to the Silicon Labs EFM32^™ Wonder Gecko Starter Kit (Part No:EFM32WG-STK3800). It also includes two energy harvester transducers (TEG and Solar) and a terminal block for connecting a high impedance AC source. In addition, many turrets are provided, making it easy to connect additional transducers to the board. The board contains multiple jumpers that allow the board to be configured in various ways. The standard build for the board has 4 jumpers installed out of the possible 12 jumpers. The board is very customizable to the end users’ needs. This compatibility makes it a perfect evaluation tool for any low power energy harvesting system. Please refer to the individual data sheets for the operation of each power management circuit. The application section of the demo manual describes the system level functionality of this board and the various ways it can be used in early design prototyping.

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