TPS386000: TPS386000 / Input SENSE voltage before power up

S.Satoshi

Part Number: TPS386000

Hi,

I'd like to know the behavior at present sense voltage before power up. So can you give your comment for following question?

Can you recommend to input SENSE voltage before powering VDD?
If Q1 is recommended, the reset keep low after power up at 0V < VSENSE < VITN ?
If Q1 is recommended, the reset goes high after tD duration at VITN < VSENSE ?

Best Regards,

Satoshi / Japan Disty

over 6 years ago

0 Michael_DeSando over 6 years ago

TI__Genius 12630 points

Satoshi,

I am not sure I understand your question. If VDD is not powered, it doesn't matter what is on SENSE. SENSE should not be above the recommended max which is VDD.

If voltage is applied to SENSE even when VDD is zero, as long as it remains below the ABS MAX of 7V the device won't become damaged but the /RESET output will still be undefined until VDD comes up to 0.9V

Please let me know if you still have questions. Thanks!

-Michael

0 S.Satoshi over 6 years ago in reply to Michael_DeSando

Guru 21675 points

Hi Michael,

Thank you for your comment. I understand that the device will not be damaged if voltage apply to SENSE even when VDD is zero, but this usage is not recommended and the /RESET output will be undefined at that condition.

Best Regards,

Satoshi

0 Michael_DeSando over 6 years ago in reply to S.Satoshi

TI__Genius 12630 points

Satoshi,

Yes you are correct.

-Michael

Power management

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TPS386000: TPS386000 / Input SENSE voltage before power up