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TPS3808-ADJ Vit time to Reset low

Other Parts Discussed in Thread: TPS3808

Hello,

We are looking at the TPS3808, and the Td is well defined, but what is the time from Vit+Vhys to when /Reset goes low?  I'm not see that defined in the datasheet.

I imagine it depends on the hysteresis, but I could use some help.


Thank you

  • Hello,

    The time delay from SENSE falling below VIT to /RESET low is dependent on the overdrive below the VIT threshold.  The further below the VIT threshold the SENSE signal falls, the less time it will take to assert the /RESET signal.  This parameter is the same as the data labeled "maximum transient duration" in the data sheet, figure 4 on page 6.  The term "maximum transient duration" is intended to describe the minimum pulse width that will result in the /RESET line going low, but this is essentially the same as the delay, since the /RESET will not occur if the SENSE voltage goes above VIT within that time period.

    Best Regards,

    Mike