The LTC3106 is ideal for powering low-power wireless sensors from primary batteries replenished by rechargeable batteries or energy harvesting. The LTC3106 incorporates a maximum power point control (MPPC) compatible with common high-impedance power sources, including photovoltaic cells, thermoelectric generators (TEGs), and fuel cells.

The LTC3106 operates at an input voltage range of 300mV to 5.5V from the primary power source when a backup source, i.e., a battery, is present. The LTC3106 is compatible with both primary batteries and rechargeable batteries connected as backup power inputs. In the absence of a backup source, the product operates from 850mV to 5.5V and then lowers to 300mV after startup.

If the primary power source is unavailable, the LTC3106 fully switches to the backup power source. The primary power source is supplied from harvest energy and can selectively charge a small amount of battery whenever surplus energy is used, as well as supply power to the load.

The LTC3106 provides a steady-state current of 300mA and a peak load current of 650mA with a maximum efficiency of 92%. Burst Mode® operation provides a standby current of only 1.6µA, further optimizing converter efficiency for all operating conditions. Zero Power “shelf mode” ensures that the backup battery remains charged when the LTC3106 is connected to the left side for an extended period.

Precise RUN pins and dedicated MPP pins are provided for input voltage control. Additionally, users can program it to be set to the input source MPP, maximizing the energy that can be extracted from the input source. The LTC3106 is