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TPS51206: ON/OFF sequence

Guru 20090 points
Part Number: TPS51206

Hello,

In the datasheet, there is the typical timing diagram.
However, our customer is not use this sequence now.

What are the risks of using the following sequence?
Can we use this sequence?
Please tell me about ON / OFF respectively.

ON : VDD,S3,S5(3.3V)  --> VDDQSNS,VLDO1N(1.5V) 
OFF : VDD,S3,S5(3.3V)  --> VDDQSNS,VLDO1N(1.5V) 


For reference, the following sequence is datasheet.

ON: VDD --> VDDQSNS,VLDOIN, VDDQSNS --> S5 --> S3
OFF : S3 --> S5 --> VDDQSNS, VLDOIN --> VDD

Best Regards,
Ryuji