Integrated circuit energy harvester

A system for energy harvesting, comprising:

• a first interface adapted to receive energy from at least one renewable energy source (ERS);
• a second interface adapted to be coupled to at least one load circuit;
• a third interface adapted to be coupled to an least one primary energy storage (PES);
• a DC-to-DC converter adapted to employ in DC-to-DC conversion only one of a single inductor and a single capacitor;
• a switching circuitry coupled to each of the first interface, the second interface, the third interface, and the DC-to-DC converter, wherein the switching circuitry is adapted to couple:
• the first interface to the DC-to-DC converter, the DC-to-DC converter to the second interface, and the DC-to-DC converter to the third interface;
• and
• a control unit connected to the DC-to-DC converter and the switching circuitry, wherein the control unit controls coupling made by the switching circuitry, so that when operating the system operates in a mode including at least one of:
• providing energy from the at least one ERS to the at least one load circuit via the DC-to-DC converter, charging the least one PES from the at least one ERS via the DC-to-DC converter, and providing energy from the at least one PES to the at least one load circuit via the DC-to-DC converter;
• wherein the control unit is configured to determine the operation mode based on at least one of:
• a current level at the DC-to-DC converter level, a voltage level at the at least one ERS, and a voltage level at the at least one PES;
• and
• wherein the DC-to-DC converter is configured by the control unit to operate in a boost mode when the voltage level at the at least one ERS is smaller than the voltage level at the at least one PES.