TPSM64406E: 4+4 phase to support 5.5V/24A output

Part Number: TPSM64406E

Tool/software:

can i use 4+4 phase ( x2 Pri +Sec ) to support 5.5V/24A? Pri Sync clock is from external 8-phase clock IC. ( 0 & 45 degree)

Sec. Sync is from Pri sync-out.