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Rewriting PSM when using LTM4686 in parallel drive

I have the following concerns about using LTM4686, please let me know

The LTM4686 is planned to be used in 4-parallel to drive 0.6V to the MCU.


Pin-strapresistors configure start-upsettings(output voltage, register address, phase, etc)

Since I want to change the output voltage according to the load, 
I2C communication is performed from the MCU and the LTM4686 setting is changed 
so that the register value is read from the resistance value.
At this time, the address and rail address are also changed.

Since the voltage is applied to the MCU from the LTM4686, there are the following concerns.
Will the output voltage be reset when the register is rewritten?
(I am worried that the LTM4686 will not be reset by changing the address)