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LTC3109 Datasheet Ultralow Voltage Step-Up Converter and Power Manager

Manufacturer: Linear Technology (now Analog Devices)

Overview: LTC3109.

General Description

n Operates from Inputs as Low as ±30mV n Less Than ±1°C Needed Across TEG to Harvest Energy n Proprietary Auto-Polarity Architecture n 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 n Power Good Indicator n Uses Compact Step-up Transformers n Small, 20-lead (4mm × 4mm) QFN Package or 20-Lead SSOP Applications n Remote Sensor and Radio Power n HVAC Systems n Automatic Metering n Building Automation n Predictive Maintenance n Industrial Wireless Sensing The LTC®3109 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.

Key Features

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