LTC3108
Ultralow Voltage Step-Up
Converter and Power Manager
FEATURES DESCRIPTION Operates from Inputs of 20mV
nn Complete Energy Harvesting Power
Management System
nn Selectable V
OUT of 2.35V, 3.3V, 4.1V or 5V
nn LDO: 2.2V at 3mA
nn Logic Controlled Output
nn Reserve Energy Output
nn Power Good Indicator
nn Uses Compact Step-Up Transformers
nn Small 12-Lead (3mm × 4mm) DFN or 16-Lead
SSOP Packages 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. The LTC3108 is functionally equivalent to
the LTC3108-1 except for its unique fixed VOUT options. nn 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 …