TPS54519: Dynamic voltage scaling

BJ Han

Expert 2035 points

Part Number: TPS54519

Dear TI,

I would like to use dynamic voltage scaling method using pwm for core & cpu power on main chip.

I would like to inquire about the value of C10 for TPS54519. (The following is an excerpt from the datasheet.)

I would like to know two things:

1. When using Vout at 1.0V, we want to know the applicable value at C58.
2. When using Vout 0.9V, we want to know the applicable value for C84.

Please review and let us have your feedback soon.
I’d like to thank you again

Thank you.

over 5 years ago

0 Iven Su over 5 years ago

TI__Expert 8245 points

Hi,

As the datasheet says, it depends on your intended crossover frequency and this capacitor value should be designed after the preliminary test on your loop compensation. Recommend to use a 220pF as a start point according to the EVM guide: www.ti.com/.../slvu523.pdf. Thanks.

0 BJ Han over 5 years ago in reply to Iven Su

Expert 2035 points

Dear Iven,

Thank you for your attention and support.

I'll give you the final question.

Can you tell me the recommended constant for R6 below?

0 Iven Su over 5 years ago in reply to BJ Han

TI__Expert 8245 points

Hi,

You can use 0Ohm as a start point since actually we don't put a resistor on evaluation board, thanks.

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TPS54519: Dynamic voltage scaling