Electronic module and switching power supply

An electronic module comprising:

• a multilayer substrate including a plurality of substrate layers stacked on each other, first and second main surfaces opposing each other, and at least one side surface connecting the first and second main surfaces;
• and
• a switching element including a plurality of terminal electrodes and being mounted on the second main surface of the multilayer substrate;
• wherein
• first, second, and third outer electrodes are provided on the first main surface;
• first, second, and third connecting electrodes are provided on the second main surface;
• the first outer electrode and the first connecting electrode are electrically connected to each other by at least one first connecting conductor;
• the second outer electrode and the second connecting electrode are electrically connected to each other by at least one second connecting conductor;
• the third outer electrode and the third connecting electrode are electrically connected to each other by at least one third connecting conductor;
• corresponding terminal electrodes of the switching element are connected to the first, second, and third connecting electrodes;
• the first connecting electrode also defines and functions as a first capacitor electrode;
• a second capacitor electrode is provided between corresponding layers of the substrate layers of the multilayer substrate;
• a capacitor is defined by electrostatic capacitance generated between the first capacitor electrode and the second capacitor electrode;
• the second capacitor electrode and the second connecting electrode are electrically connected to each other by at least one fourth connecting conductor;
• an inductor is defined by the at least one fourth connecting conductor;
• and
• the capacitor and the inductor define a snubber circuit.