Surface mount coil component, method of manufacturing the same, and DC-DC converter using the same

A DC-DC converter comprising:

• a switching element;
• and
• a choke coil that is connected to the switching element;
• wherein
• the choke coil includes:
• an element body that includes a first surface, a second surface that opposes the first surface, and a third surface that connects the first surface and the second surface, the element body defining a compact that includes magnetic particles;
• a first conductor pattern that is provided at the first surface of the element body;
• a second conductor pattern that is provided at the second surface of the element body;
• input/output terminals that are provided at the third surface of the element body;
• and
• a plurality of metal pins that are embedded in the element body, one end of each metal pin being connected to the first conductor pattern, and another end of each metal pin being connected to the second conductor pattern;
• wherein
• the first conductor pattern, the second conductor pattern, and the plurality of metal pins define a coil conductor;
• and
• the input/output terminals are defined by a pair of metal pins among the plurality of metal pins, the pair of metal pins being exposed at the third surface of the element body, the third surface being a mounting surface of the choke coil.