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LM25575: SS pin voltage and some resistance

Genius 15970 points
Part Number: LM25575

Hello,

My customer has a question for the blew circuit in the datasheet.

1)
For pin 10(SS), 1.25V seems to be output on this pin from the block diagram.
Is it correct? I believe that 1.25V is just a typ value.
Could you tell me the possible maximum output voltage? 

2)
For R3 and R4, could you tell me what power rating resistors should be used?

Regards,
Oba