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TPS65220: LDO3 Cout

Hirotsugu Kobayashi
Mastermind 9530 points
Part Number: TPS65220
Other Parts Discussed in Thread: SK-AM64B, , TPS65219

Hi team,

The maximum value of Cout for LDO3 is 30uF, but a total of 19.3uF is used in the SK-AM64B circuit.

Is it possible for LDO3 to become unstable?

,TPS65220_LDO3.pdf

Best Regards

  • 0
    TI__Genius 16510 points

    Hello Kobay,

    Thank you for reaching out and Happy Holidays. Please note we have limited product support available from 22-December thru 6-January. Your request has been assigned but will be delayed during this time. Please expect a response by January 10th 2023. Thank you for your patience!

    Best Regards,

    Ishtiaque Panhwar

  • 0 in reply to Ishtiaque Panhwar
    TI__Mastermind 22196 points

    Hi,

    Thanks for your patience! The AM64B SK EVM uses TPS6522053 which has LDO3 configured for "slow ramp". This configuration allows a maximum of 30uF total capacitance (local + point of load). 

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Mastermind 9530 points

    Hi Brenda,

    Thanks, I understood that LDO3 is set to slow ramp.
    Where can I find other register settings for TPS6522053?

    Best Regards,

  • +1 in reply to Hirotsugu Kobayashi
    TI__Mastermind 22196 points

    Hi,

    The default NVM register settings for each or the TPS65219 or TPS65220 variants can be found in their corresponding Technical Reference Manual (TRM) which will be available in the product folder at ti.com, under technical documentation. I have attached the preliminary TRM for TPS6522053. Please note this device has not been released yet so all the information provided is preliminary and subject to change without notice. However, we do not anticipate any changes. Once the device is released, all customers should refer to the online TRM located on product folder at ti.com and not the document provided by E2E prior to release.

    Let us know if you have any questions or need additional information. 

    TPS6522053_TRM_draft_02.pdf

    Thanks,

    Brenda