AM62A7-Q1: LSI internal model for PDN

KenF

Part Number: AM62A7-Q1

Hello Sreenivasa,

In the E2E, you mentioned as follows:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1203305/faq-am62a7-and-am62a7-q1-custom-board-hardware-design-collaterals-to-get-started
We have the target impedance value for the core voltage and the DDR voltage.

Is the target impedance of the above URL specified under conditions that do not include LSI? If it should include LSI, please provide LSI internal model for PDN.

Best regards,
Ken

over 1 year ago

0 Kallikuppa Sreenivasa over 1 year ago

TI__Guru**** 189029 points

Hello Ken,

Thank you for the query.

The information on the FAQ is what we provide for customers as for PDN target impedance.

I have not had any customer asking about LSI.

KenF said:
Is the target impedance of the above URL specified under conditions that do not include LSI? If it should include LSI, please provide LSI internal model for PDN.

Pease share additional information that you may have regarding the LSI internal model for PDN including a short description for me to check.

Regards,

Sreenivasa

0 KenF over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Expert 7150 points

Hello Sreenivasa,

Thank you for your response. When we calculate impedance and compare to target impedance, impedance in AM62A should be taken into account? Or impedance outside of AM62A is enough?

Best regards,
Ken

+1 Kallikuppa Sreenivasa over 1 year ago in reply to KenF

TI__Guru**** 189029 points

Hello Ken,

Thank you,

The target impedance numbers have been arrived based on internal simulations.

KenF said:
Or impedance outside of AM62A is enough?

This is correct.

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 189029 points

Hello Ken,

I am referencing the app note in case you have not had a chance to look at..

https://www.ti.com/lit/an/sprac76f/sprac76f.pd

Regards,

Sreenivasa

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AM62A7-Q1: LSI internal model for PDN