Power supply unit for aerosol inhaler

A power supply unit for an aerosol inhaler comprising:

• a power supply configured to supply power to a load that atomizes an aerosol source;
• a first DC/DC converter connected to the power supply;
• a second DC/DC converter connected to the power supply and different from the first DC/DC converter;
• and
• a circuit board on which the first DC/DC converter and the second DC r DC converter are mounted, wherein
• the circuit board is substantially L-shaped and as viewed from a first direction perpendicular to a surface of the circuit board on which the first DC/DC converter and the second DC/DC converter are mounted, at least a portion of the circuit board includes:
• a connection portion, a first portion of the connection portion extending in a second direction perpendicular to the first direction, and a second portion of the connection portion extending in a third direction perpendicular to the first direction and the second direction,
• the first DC/DC converter is mounted on the first portion, and
• the second DC/DC converter is mounted on the second portion,
• wherein the power supply unit further comprises a cartridge holder configured to hold a cartridge including an aerosol source and a load to heat the aerosol source using power supplied from the power supply, wherein the cartridge holder is arranged where the first portion and the second portion meet to form a right angle and on a same side of the L-shaped circuit board as the extension of the first portion in the second direction.