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TPS51225C: TPS51225C don't generate 3.3 v and 5 V from the two switching controllers

bear little
Prodigy 10 points
Part Number: TPS51225C

Hi

I have some problems with the design of TPS51225C. What I need is 5V and 3.3V output  with a large current.

TPS51225C  have no output voltage  from the two switching controllers（5V and 3.3V）.But the pin VREG3 have 3.3V output ,LDO 3V3 is OK.Is there any problem with my schematic diagram？