the weather got warmer here in Japan and now the LDO overheats !

I am now running the board off a bench supply after blowing 2 LDO's ! 

I think the answer is to increase board size to 100x100mm for more ground plane and possible

add the power supply on a daughter card. were running 2 x XMOS chips and they get hot.

I will stress the DCDC convertor with a load and check its not over volt the LDO under dramatic

 load switching but I think its just heat !

Making a PCB as small as possible is not always the best idea , heat is a factor !