LTC3892 gate drive

I am finding that the LTC3892 appears to be having the high side gate drivers getting killed.  I looked through the datasheet and it does not indicate the drive current that the high side gate drive can source.  

What is the maximum  and continuous gate drive current that the LTC3892 can source?  

Note I find that the chip seems to fail when a load is attached to the output, what I assume happens is the output voltage drops and the high side FETs turn on for longer time and this causes more power to dissipated in the gate driver until it over heats and dies.