A packaged semiconductor device includes a substrate having a first surface and a second surface opposite the first surface. At least one semiconductor die is mounted at the first surface of the substrate. Electrically-conductive leads are arranged around the substrate, and electrically-conductive formations couple the at least one semiconductor die to selected leads of the electrically-conductive leads. A package molding material is molded onto the at least one semiconductor die, onto the electrically-conductive leads and onto the electrically-conductive formations. The package molding material leaves the second surface of the substrate uncovered by the package molding material. The substrate is formed by a layer of electrically-insulating material.