Add SiC431, SiC438 and SiC437 buck regulators
Add symbols for sic431, sic437, sic438 DC/DC microbulk converters https://www.vishay.com/docs/74589/sic431.pdf https://www.vishay.com/docs/75921/sic437.pdf
Edited by Uli Köhler
Add symbols for sic431, sic437, sic438 DC/DC microbulk converters https://www.vishay.com/docs/74589/sic431.pdf https://www.vishay.com/docs/75921/sic437.pdf