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LTC3108EDEPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC3108EDEPBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 20 page LTC3108 1 3108p TYPICAL APPLICATION DESCRIPTION Ultralow Voltage Step-Up Converter and Power Manager 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 TEG (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. Wireless Remote Sensor Application Powered From a Peltier Cell FEATURES APPLICATIONS n Operates from Inputs of 20mV n 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 n Power Good Indicator n Ultralow IQ: 6μA n Uses Compact Step-Up Transformers n Small 12-Lead (4mm × 3mm) DFN or 16-Lead SSOP Packages n Remote Sensors and Radio Power n Surplus Heat Energy Harvesting n HVAC n Industrial Wireless Sensing n Automatic Metering n Building Automation n Indoor Light Energy Harvesting 3108 TA01a C1 TEG 20mV TO 500mV C2 SW VS2 VS1 VOUT2 PGOOD 2.2V 470μF PGD VLDO VSTORE + VOUT VOUT2_EN LTC3108 VAUX GND 0.1F 6.3V 5V 3.3V 1μF 1nF 220μF 1:100 330pF SENSORS RF LINK μP 2.2μF + + + VOUT Charge Time 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. VIN (mV) 10 1 100 1000 0 3108 TA01b 0 100 150 250 50 200 300 350 400 VOUT = 3.3V COUT = 470μF 1:100 Ratio 1:50 Ratio 1:20 Ratio Electrical Specifications Subject to Change |
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