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lm2678 output overvoltage problem...

I have designed a 5V/5A  Power switcher using WEBENCH Design Software 

  Vin = 24V

 Vout = 5V

Iout  = 5A 

But  i  am  switching  it  on  and  measure  the  output  voltage  it i s  greater  than  7V, and  i want  exact  5V  for  my  application  1%  tolerance  is considerable .

I  am  also providing  actual  circuit that  i have  used  in  my  board

Please help me to resolve this problem.

Regards,

Krishnakant