TPS54225: Soft-start waveform

Hi Ben,

I will need to check on an EVM or with design for any reference on this. Are you testing this on an EVM or a custom board? Can you possibly share the schematic and other details on conditions under which this is being tested like Vin and Iout (eload or resistive load)? VOUT looks to be around 2.7V?

Thanks,

Amod

Hi Amod,

I applied one EVM but not get it yet. Could you help to confirm from your side?

Another question is, what is maximum voltage level at SS pin?

Output voltage is 2.5V, the waveform shows 2.7V should be issue from resolution of scope setting.

Partial schematic as below, there are no issue at output side(Lout/Cout). It's follow datasheet recommendation and we have qualified this design before.

Regards,

Ben

Hi Ben,

SS is most likely pulled up to VREG5 (~5.5V) and should not exceed that value. I am confirming with designer too. I do not have an EVM either to confirm so trying to double check with design on this. Will update you once I receive an answer.

Thanks,

Amod

Hi Amod,

Thanks, please share your comments once you have feedback from designer team.

Regards,

Ben