Please doublecheck this possible alternative for 620-1463-2-ND / A4979GLPTR-T as IC MTR DRV BIPOLR 3-5.5V 28TSSOP from Allegro MicroSystems where our lead time is so long that whatever shorter might save the situation.
Sorry there is nothing from Trinamics/ADI available, but you could try if this can be the closest substitute:
BD63520AEFV-E2 / BD63520AEFV-E2CT-ND as IC MTR DRV BIPOLR 8-28V 28HTSSOP from our supplier Rohm Semiconductor.
Please review the datasheets to ensure the alternative will work for your application.