WEBENCH® Tools/TPS53315: PGOOD issue during simulation in WeBench.

Tool/software: WEBENCH® Design Tools

Hi,

When i simulate the design which is provided by Webench for

• Vin=5v
• Vout=1V
• Iout=10A

And probe the Vin(VV4), Vout(VV3), and PGOOD (VV10) in webench ,

1. I get PGOOD in millivolts but here its has been pulled up to VREG(5v).
2. And also according to the datasheet PGOOD should start(go high) after 1ms of the output signal has come(ie: when the soft start has been completed),But here in this waveform its coming before Vout?.
3. Since i am using the PGOOD of this regulator to enable my next regulator , I am not able to make the power timing sequence (ie : because i want to know after how long my 2nd regulator will turn on, when my 1st regulator has already turned on.
4. Is this simulation proper?

I have attached the webench schematic and waveforms here

• Red colour wave is output
• Blue is PGOOD
• Green is Input wave

Please help me as soon as possible to solve this issue. I need to impleament this in my project.

Regards,

Karthik