Diodes:
https://www.diodes.com/design/support/application-notes/
Onsemi:
https://www.onsemi.com/support/design-resources/appnotes
Irf:
http://www.irf.com/application-notes
Cypress:
https://www.cypress.com/documentation/application-notes
Microchip:
https://www.microchip.com/wwwcategory/taxonomysearch/