Temperature of LTM4675 very high

Hi All,

My design use LTM4675 to create 3V3 with maximum current about 9A but when i use LTpowerPlay to monitor all parameter of LTM4675, i can see temperature of LTM4675 up to above 80 degree with 2.6W (Iout = 800mA, Eff = 80%), can you help me to solve this problem? Maybe my design has some problems?? Please see more detail in attack file, thanks all!

LTPowerPlay

LTM4675 Schematic

3264.[8]UTIL3V3_UTIL5V.pdf



change file
[edited by: nghiadt4 at 2:27 AM (GMT 0) on 3 Jan 2019]