TPS543C20A: Support for TI PSPICE simulation for TPS543C20RVFT part in stacked mode

Karthik B

Part Number: TPS543C20A

Hi Team,

We are using TPS543C20RVFT part in my design in stacked mode and we are running in high droop at 50A current .

We have set Vout=0.8V and frequency is set to 1000KHz. So we are looking for the root cause and we are planning to run the transient and phase margin using the TI PSPICE tool.

Kindly request you to help us in characterising the regulator in board and resolve this issue.

Regards,

Karthik

over 3 years ago

0 Tahar Allag over 3 years ago

TI__Mastermind 32400 points

Hello Karthik,

we are looking into this, please allow couple days

Tahar

0 Britton Jones over 3 years ago

TI__Expert 8576 points

Hello Karthik,

Can you please provide your PSPICE design so that we can take a look into the schematic and results?

Best regards,
Britton

0 Karthik B over 3 years ago in reply to Britton Jones

Expert 1310 points

Hi Britton,

I dont have any PSPICE design, I only have the schematics file .dsn attached for your reference.

Please let me know if this helps.

TI_REG.DSN

Regards,

Karthik

0 Britton Jones over 3 years ago in reply to Karthik B

TI__Expert 8576 points

Thanks Karthik! This helps a lot. Please allow me to get back to you with my thoughts early next week

Best regards,
Britton

0 Britton Jones over 3 years ago in reply to Karthik B

TI__Expert 8576 points

Hi Karthik,

I didn't notice anything obvious from the schematic that would hint at a solution.

What size voltage drop are you seeing? Also, where are you probing the output voltage at?

Is this on a TI EVM or your own layout? If it is your own layout, kindly share the layout.

These all may give me some clue as to what is happening.

Best regards,

Britton

0 Miranda Gu over 3 years ago in reply to Britton Jones

TI__Genius 16632 points

Hi Karthik,

I will close this post as long time no feedbacks.

If you need further support, please reply and this post will be open again.

0 Karthik Nagendran over 3 years ago in reply to Miranda Gu

Prodigy 10 points

Hi Miranda Gu,

I have the same similar problem with my board and I would like to check and re-initiate a ticket.

and i will share some information on this to figure out the rootcause.

Regards,

Karthik N

Power management

Power management forum

TPS543C20A: Support for TI PSPICE simulation for TPS543C20RVFT part in stacked mode