Datasheet LTC3108-1 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Ultralow Voltage Step-Up Converter and Power Manager |
| Pages / Page | 24 / 1 — FeaTures. DescripTion. Operates from Inputs of 20mV. Complete Energy … |
| File Format / Size | PDF / 409 Kb |
| Document Language | English |
FeaTures. DescripTion. Operates from Inputs of 20mV. Complete Energy Harvesting Power. Management System
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LTC3108-1 Ultralow Voltage Step-Up Converter and Power Manager
FeaTures DescripTion
n
Operates from Inputs of 20mV
The LTC®3108-1 is a highly integrated DC/DC converter ideal n
Complete Energy Harvesting Power
for harvesting and managing surplus energy from extremely
Management System
low input voltage sources such as TEGs (thermoelectric
- Selectable VOUT of 2.5V, 3V, 3.7V or 4.5V
generators), thermopiles and small solar cells. The step-up
- LDO: 2.2V at 3mA
topology operates from input voltages as low as 20mV.
- Logic Controlled Output
Using a small step-up transformer, the LTC3108-1 provides
- Reserve Energy Output
a complete power management solution for wireless sens- n
Power Good Indicator
ing and data acquisition. The 2.2V LDO powers an external n Uses Compact Step-Up Transformers microprocessor, while the main output is programmed to n Small 12-Lead (3mm × 4mm) DFN or 16-Lead one of four fixed voltages to power a wireless transmitter SSOP Packages or sensors. The power good indicator signals that the main output voltage is within regulation. A second output can be
applicaTions
enabled by the host. A storage capacitor provides power n Remote Sensors and Radio Power when the input voltage source is unavailable. Extremely n Surplus Heat Energy Harvesting low quiescent current and high efficiency design ensure n HVAC Systems the fastest possible charge times of the output reservoir n Industrial Wireless Sensing capacitor. The LTC3108-1 is functionally equivalent to the n Automatic Metering LTC3108 except for its unique fixed VOUT options. n Building Automation n The LTC3108-1 is available in a small, thermally enhanced Predictive Maintenance 12-lead (3mm × 4mm) DFN package and a 16-lead SSOP L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. package.
Typical applicaTion Wireless Remote Sensor Application Powered From a Peltier Cell VOUT Charge Time
1nF 1:100 5.25V 1000 C1 VSTORE V + + + OUT = 3V 0.1F C THERMOELECTRIC OUT = 470µF LTC3108-1 220µF 6.3V GENERATOR 330pF 100 C2 VOUT2 PGOOD 20mV TO 500mV PGD 2.2V µP SW VLDO 2.2µF 10 SENSORS TIME (sec) VS2 V 3V OUT + RF LINK 470µF 1 1:100 Ratio VS1 VOUT2_EN 1:50 Ratio 31081 TA01a VAUX GND 1:20 Ratio 0 0 50 100 150 200 250 300 350 400 1µF VIN (mV) 31081 TA01b 31081fb For more information www.linear.com/LTC3108-1 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
FeaTures DescripTion
n
Operates from Inputs of 20mV
The LTC®3108-1 is a highly integrated DC/DC converter ideal n
Complete Energy Harvesting Power
for harvesting and managing surplus energy from extremely
Management System
low input voltage sources such as TEGs (thermoelectric
- Selectable VOUT of 2.5V, 3V, 3.7V or 4.5V
generators), thermopiles and small solar cells. The step-up
- LDO: 2.2V at 3mA
topology operates from input voltages as low as 20mV.
- Logic Controlled Output
Using a small step-up transformer, the LTC3108-1 provides
- Reserve Energy Output
a complete power management solution for wireless sens- n
Power Good Indicator
ing and data acquisition. The 2.2V LDO powers an external n Uses Compact Step-Up Transformers microprocessor, while the main output is programmed to n Small 12-Lead (3mm × 4mm) DFN or 16-Lead one of four fixed voltages to power a wireless transmitter SSOP Packages or sensors. The power good indicator signals that the main output voltage is within regulation. A second output can be
applicaTions
enabled by the host. A storage capacitor provides power n Remote Sensors and Radio Power when the input voltage source is unavailable. Extremely n Surplus Heat Energy Harvesting low quiescent current and high efficiency design ensure n HVAC Systems the fastest possible charge times of the output reservoir n Industrial Wireless Sensing capacitor. The LTC3108-1 is functionally equivalent to the n Automatic Metering LTC3108 except for its unique fixed VOUT options. n Building Automation n The LTC3108-1 is available in a small, thermally enhanced Predictive Maintenance 12-lead (3mm × 4mm) DFN package and a 16-lead SSOP L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. package.
Typical applicaTion Wireless Remote Sensor Application Powered From a Peltier Cell VOUT Charge Time
1nF 1:100 5.25V 1000 C1 VSTORE V + + + OUT = 3V 0.1F C THERMOELECTRIC OUT = 470µF LTC3108-1 220µF 6.3V GENERATOR 330pF 100 C2 VOUT2 PGOOD 20mV TO 500mV PGD 2.2V µP SW VLDO 2.2µF 10 SENSORS TIME (sec) VS2 V 3V OUT + RF LINK 470µF 1 1:100 Ratio VS1 VOUT2_EN 1:50 Ratio 31081 TA01a VAUX GND 1:20 Ratio 0 0 50 100 150 200 250 300 350 400 1µF VIN (mV) 31081 TA01b 31081fb For more information www.linear.com/LTC3108-1 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
