A switched mode power supply, SMPS, circuit comprising: a transformer configured to convert an input voltage (Vin) applied to a primary winding of the transformer into an output voltage at a secondary winding of the transformer ; and a galvanic isolated integrated feedback circuit configured to control the output voltage at the secondary winding of the transformer ; wherein the galvanic isolated integrated feedback circuit comprises: an on chip inductor element to which the output voltage of the secondary winding of the transformer is applied to generate a magnetic field measured by an on chip Hall sensor of that galvanic isolated feedback circuit to provide a control voltage used to control the output voltage of the transformer ; and a switching regulator connected to the primary winding of the transformer ; wherein the on chip inductor element comprises a coil having a rectangular or spiral form implemented as a metal layer of said integrated feedback circuit , wherein the on chip inductor element and the on chip Hall sensor element are implemented in different layers of the integrated feedback circuit to provide a predetermined distance between the on chip inductor element and the on chip Hall sensor element . a transformer configured to convert an input voltage (Vin) applied to a primary winding of the transformer into an output voltage at a secondary winding of the transformer ; and a galvanic isolated integrated feedback circuit configured to control the output voltage at the secondary winding of the transformer ; wherein the galvanic isolated integrated feedback circuit comprises: an on chip inductor element to which the output voltage of the secondary winding of the transformer is applied to generate a magnetic field measured by an on chip Hall sensor of that galvanic isolated feedback circuit to provide a control voltage used to control the output voltage of the transformer ; and a switching regulator connected to the primary winding of the transformer ; wherein the on chip inductor element comprises a coil having a rectangular or spiral form implemented as a metal layer of said integrated feedback circuit , wherein the on chip inductor element and the on chip Hall sensor element are implemented in different layers of the integrated feedback circuit to provide a predetermined distance between the on chip inductor element and the on chip Hall sensor element . an on chip inductor element to which the output voltage of the secondary winding of the transformer is applied to generate a magnetic field measured by an on chip Hall sensor of that galvanic isolated feedback circuit to provide a control voltage used to control the output voltage of the transformer ; and a switching regulator connected to the primary winding of the transformer ; wherein the on chip inductor element comprises a coil having a rectangular or spiral form implemented as a metal layer of said integrated feedback circuit , wherein the on chip inductor element and the on chip Hall sensor element are implemented in different layers of the integrated feedback circuit to provide a predetermined distance between the on chip inductor element and the on chip Hall sensor element . <EOS>