I am considering using the TPS57160-Q1.
Vout is 5.625V ,switching frequency is 400kHz and inductor ripple current is 100mVpeak.
Usually it is used in Vin12V, but that worst case Vin is 6V.
In this case the duty is 93%.
When actually board operating under these conditions, at some of the board it seems that the output voltage is oscillating.
Perhaps it is working PH-BOOT UVLO.
Because switching frequency is very slow and It is in normal operation when Vin becomes gradually up to 8V.
I must consider it as a little more take a potential difference of Vin and Vout.
But then comp voltage is around 2V and SS voltage is 300mV to 200mV.
I'm thinking oscillation of output is due to the potential difference of PH-BOOT, but I have become worried that there is no cause something else to look at the COMP and SS voltage.
The operation of the COMP and SS voltage or will those that are assumed?
If it is how much of Duty, Will it be considered that there is sufficient margin?