Inductor component and DC-DC converter

An inductor component comprising:

• an air core coil that includes an air core body containing a non-magnetic material, an air core inductor wire provided in the air core body and extending along a predetermined plane, a first air core outer terminal electrically connected to a first end portion of the air core inductor wire, and a second air core outer terminal electrically connected to a second end portion of the air core inductor wire;
• and
• a magnetic core coil that includes a magnetic core body containing a magnetic material, a magnetic core inductor wire provided in the magnetic core body and extending parallel to the predetermined plane, a first magnetic core outer terminal electrically connected to a first end portion of the magnetic core inductor wire, and a second magnetic core outer terminal electrically connected to a second end portion of the magnetic core inductor wire, wherein
• the first air core outer terminal, the second air core outer terminal, the first magnetic core outer terminal, and the second magnetic core outer terminal are each exposed at a first main surface,
• in a predetermined cross section taken in a direction perpendicular to a direction in which the air core inductor wire or the magnetic core inductor wire extends, a direction parallel to the predetermined plane is defined as a width direction, a direction perpendicular to the predetermined plane is defined as a thickness direction, a dimension in the width direction of the air core inductor wire or the magnetic core inductor wire in the predetermined cross section is defined as a wire width, and a dimension in the thickness direction of the air core inductor wire or the magnetic core inductor wire in the predetermined cross section is defined as a wire thickness,
• in the predetermined cross section, a first straight line is defined as an imaginary straight line passing through a portion spaced the wire width apart in the width direction from a first end in the width direction of the air core inductor wire or the magnetic core inductor wire and extending in the thickness direction,
• in the predetermined cross section, a second straight line is defined as an imaginary straight line passing through a portion spaced the wire width apart in the width direction from a second end in the width direction of the air core inductor wire or the magnetic core inductor wire and extending in the thickness direction,
• in the predetermined cross section, a third straight line is defined as an imaginary straight line passing through a portion spaced the wire thickness apart in the thickness direction from a first end in the thickness direction of the air core inductor wire or the magnetic core inductor wire and extending in the width direction,
• in the predetermined cross section, a fourth straight line is defined as an imaginary straight line passing through a portion spaced the wire thickness apart in the thickness direction from a second end in the thickness direction of the air core inductor wire or the magnetic core inductor wire and extending in the width direction,
• where, in the predetermined cross section, a peripheral region around the air core inductor wire or the magnetic core inductor wire is defined as a portion having a wiring portion removed from a region surrounded by the first straight line, the second straight line, the third straight line, and the fourth straight line,
• in the predetermined cross section including an intermediate position between the first air core outer terminal and the second air core outer terminal, a magnetic material content that is a content of magnetic material in the peripheral region around the air core inductor wire is less than 50%,
• in the predetermined cross section including an intermediate position between the first magnetic core outer terminal and the second magnetic core outer terminal, the magnetic material content in the peripheral region around the magnetic core inductor wire is greater than or equal to 50%, and
• the air core body and the magnetic core body are combined or integrated.