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TPS2552: Enable behavior and its threshold variation

Ryotaro Fukui
Intellectual 2345 points
Part Number: TPS2552
Other Parts Discussed in Thread: TPS25221

Hello team,

i received some questions from my customer about the enable behavior and its threshold variation of TPS2552. I would appreciate if you could give us an advice about it.

(1) The OUT pin output appears to be disabled when the pin has a momentary H-level applied even if its not a continuous H-level. Is this behavior normal?

(2) The variation in the limit current value seems to appears in IOS min <- IOS nom -> IOS max, but what is the main cause of the variation?

Ambient temperature? Tj? Or is it the Variation between each device?

(3) What should we do to reduce this variation? (ideally zero) Are there any devices that have a similar functions other than the TPS2552 without a variation?

(4) Are there any recommended devices other than the TPS2552 with a similar function?

(5) If there is a variation between each device, we want to know the quantitative evaluation criteria such as the distribution.

Best Regards,

Ryotaro Fukui

  • 0
    TI__Mastermind 18031 points

    Hi Ryotaro,

    1) it's normal. I think it's reverse voltage protection function. Please see spec in details.

    2) The variation is caused by temperature and process.

    3) That's the behavior of the inherent characteristics.

    4) You can check TPS25221.

    5) Electrical Characteristics includes the min, Max value which includes the distribution.

    For TI's policy, I will first click resolved button.

    If you have any other concern, contact me any time.

    If you think resolved, please help click 'Issue is solved button'.

    Thanks.

     

  • 0
    TI__Mastermind 18031 points

    Hi Ryotaro,

    1) it's normal. I think it's reverse voltage protection function. Please see spec in details.

    2) The variation is caused by temperature and process.

    3) That's the behavior of the inherent characteristics.

    4) You can check TPS25221.

    5) Electrical Characteristics includes the min, Max value which includes the distribution.

    For TI's policy, I will first click resolved button.

    If you have any other concern, contact me any time.

    If you think resolved, please help click 'Issue is solved button'.

    Thanks.

     

  • 0 in reply to Ziv Zhang
    TI__Intellectual 2345 points

    Hi Ziv,

    Thank you for your response.

    So about 3) is it ok to understand that, since the variation is a device inherent characteristic, there is no way to reduce it further? Even with external components, it is not related to the threshold variation, isn't it?

    And about after their concern is solved, should I first inform you that the case is closed before clicking the resolved button? Is it correct?

    Regards,

    Ryotaro Fukui

  • +1 in reply to Ryotaro Fukui
    TI__Mastermind 18031 points

    Correct.

    Just click resolved button. Doesn't need to inform me.

    Thanks.