An integrated circuit for energy harvesting comprising • a power input terminal for receiving an input power (P in, P in-1, P in-2, P in-3) from an energy harvester, • a voltage converter for converting said input power into an output power, • a power output terminal for supplying the output power (P out, P out-1, P out-2, P out-3) to an energy storage device or an application load, • a power point tracker for determining a target voltage V T for regulating an input voltage of the voltage converter, • a controller for controlling said voltage converter and said power point tracker, and wherein said controller is configured for switching the integrated circuit to various operation states, and wherein said various operation states comprise at least a) a normal operation state wherein the power point tracker is disabled and wherein the voltage converter is enabled for converting the input power into the output power, and b) a power point tracking state wherein the voltage converter is disabled and wherein the power point tracker is enabled for determining said target voltage V T, characterized in that said integrated circuit for energy harvesting comprises • an interface circuit for exchanging signal information between said controller and one or more additional integrated circuits for energy harvesting, and wherein said controller is coupled with said interface circuit and configured for a) transmitting a status signal (PPT stat) to said interface circuit, wherein a first PPT value and a second PPT value of said status signal (PPT stat) indicate if said power point tracker is respectively enabled or disabled, and b) receiving a trigger signal (EN VC) from said interface circuit and switching the integrated circuit to the normal operating state on condition that said trigger signal (EN VC) has changed from a first reference value to a second reference value, and wherein said interface circuit comprises a) a monitoring means configured for • monitoring at least one input signal (S IN) from said one or more additional integrated circuits for energy harvesting, and for • generating said trigger signal (EN VC) based on said at least one input signal (S IN), and b) an outputting means for generating, based on said power point tracker status signal (PPT stat), at least one output signal (S OUT) for said one or more additional integrated circuits for energy harvesting, and wherein said at least one output signal (S OUT) comprises information indicating if said power point tracker is enabled or disabled. • a power input terminal for receiving an input power (P in, P in-1, P in-2, P in-3) from an energy harvester, • a voltage converter for converting said input power into an output power, • a power output terminal for supplying the output power (P out, P out-1, P out-2, P out-3) to an energy storage device or an application load, • a power point tracker for determining a target voltage V T for regulating an input voltage of the voltage converter, • a controller for controlling said voltage converter and said power point tracker, and wherein said controller is configured for switching the integrated circuit to various operation states, and wherein said various operation states comprise at least a) a normal operation state wherein the power point tracker is disabled and wherein the voltage converter is enabled for converting the input power into the output power, and b) a power point tracking state wherein the voltage converter is disabled and wherein the power point tracker is enabled for determining said target voltage V T, a) a normal operation state wherein the power point tracker is disabled and wherein the voltage converter is enabled for converting the input power into the output power, and b) a power point tracking state wherein the voltage converter is disabled and wherein the power point tracker is enabled for determining said target voltage V T, • an interface circuit for exchanging signal information between said controller and one or more additional integrated circuits for energy harvesting, a) transmitting a status signal (PPT stat) to said interface circuit, wherein a first PPT value and a second PPT value of said status signal (PPT stat) indicate if said power point tracker is respectively enabled or disabled, and b) receiving a trigger signal (EN VC) from said interface circuit and switching the integrated circuit to the normal operating state on condition that said trigger signal (EN VC) has changed from a first reference value to a second reference value, a) a monitoring means configured for • monitoring at least one input signal (S IN) from said one or more additional integrated circuits for energy harvesting, and for • generating said trigger signal (EN VC) based on said at least one input signal (S IN), and • monitoring at least one input signal (S IN) from said one or more additional integrated circuits for energy harvesting, and for • generating said trigger signal (EN VC) based on said at least one input signal (S IN), and b) an outputting means for generating, based on said power point tracker status signal (PPT stat), at least one output signal (S OUT) for said one or more additional integrated circuits for energy harvesting, and wherein said at least one output signal (S OUT) comprises information indicating if said power point tracker is enabled or disabled.