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66AK2G02: Power down sequence for 66AK2G02

Sung-IL
Mastermind 28755 points
Part Number: 66AK2G02

Dear Champs,

Could you please let me know if power-down sequence is needed for 66AK2G02?

I could not find it in datasheet, and want to get your confirm on this.

Thanks and Best Regards,

SI.

  • 0
    TI__Guru**** 161600 points
    Hi,

    This is strange, there is no mention in the DM, that the device has a power-down sequence. Let me check with the design team.

    In my experience with all other TI devices, the power down sequence is usually reverse of the power-up sequence, and it should be strictly followed.

    Best Regards,
    Yordan
  • 0 in reply to Yordan Kovachev
    TI__Guru**** 161600 points
    Hi,

    I spoke with the DM team. The powerdown sequence is still NOT available.
    As I said, power supplies should be disabled in reverse order compared to the power up sequence.

    I checked the K2G GP EVM reference design and it uses TPS659118, so its OTP should meet the power-up/down sequences for this device.

    I am looping the k2g hw designers to confirm my understanding.

    Best Regards,
    Yordan
  • 0
    TI__Mastermind 42545 points

    Hi Sung-IL,

    As was stated in the other replies, the power down sequence should be the reverse of the power up sequence for the K2G. I will check and find out why it isn't listed in the data sheet. While a controlled power down isn't always possible the reverse order should be implemented when the supplies are powered down in a controlled fashion. 

    Regards,

    Bill

  • 0 in reply to Bill Taboada
    Guru 19890 points
    Hello Bill,

    My understanding is there is no requirement for power down sequence on K2G. Could you please ask your internal team again ?

    Best Regards,
    Naoki
  • 0 in reply to Naoki Kawada
    TI__Mastermind 42545 points
    Hi Naoki,
    Let me clarify my statement. If you have implemented a circuit to control the power down sequence, the reverse of the power up sequence is preferred. A controlled power down sequence is not a requirement for the K2G. Bringing the power supplies down in any sequence shouldn't cause any problems with the part.
    Regards,
    Bill