About ADUM4221/ADUM4121 magnetic isolation and VDD1 power supply

About ADUM4221/ADUM4121 magnetic isolation and VDD1 power supply

1.ADUM4221/ADUM4121 is magnetic isolation. In PCB design, it is usually close to the main transformer. Will the transformer and the internal isolation coil of ADUM4221 interfere with each other?

2.The maximum power supply VDD1 of ADUM4221/ADUM4121 is only 6.5V. When cooperating with UCC256304 PWM IC, it is necessary to add an LDO for ADUM4221 separately to supply power. Besides this solution, is there any better solution?