Description
The LTC®3108 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.
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 (4mm × 3mm) DFN package and a 16-lead SSOP package.
Features
- 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
- Ultralow IQ: 6μA
- Uses Compact Step-Up Transformers
- Small 12-Lead (4mm × 3mm) DFN or 16-Lead
- SSOP Packages
Applications
- Remote Sensors and Radio Power
- Surplus Heat Energy Harvesting
- HVAC
- Industrial Wireless Sensing
- Automatic Metering
- Building Automation
- Predictive Maintenance
Packaging
DFN-12, SSOP-16
Typical Application
