Part Number: TPS53515
Vin=12V, Vout=0.8V/8A application, Cin=44uF and Cout=350PF. The detail schematic as follows:
When Fsw=600KHZ, the frequency isn't satble. The wave for SW point is in the below:
But the circuit works well with Fsw=400KHZ, please find the wave for SW point and BODE in the two following picture:
I wonder what cause this phenomena, and how can I fix this issue by adjusting the component's parameter? Thanks.