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DRV8332: using external 3.3V supply for DRV8332

Part Number: DRV8332

Can I provide an external 3.3V to VREG pin of DRV8332 instead  of providing 12V on VDD pin of DRV8332 to reduce the power consumption? Since VDD is used to power LDO inside DRV8332 which generates 3.3V to power internal logic circuits of DRV8332. The input of this internal LDO is 12V and the output is 3.3V, so the efficiency is 3.3V/12V=27.5%, the efficiency is poor.