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TPS3850-Q1: datasheet question

kura
Genius 4840 points
Part Number: TPS3850-Q1
Other Parts Discussed in Thread: TPS3850,

TPS3850-Q1.xlsx

(1)

In datasheet.There are VIT+(nom) and VIT-(nom).

Please let us know how to calucurate VIT+(nom) and VIT-(nom) when sense voltage is 3.3V.

(2)

VIL MAX 0.25V is very small.

Is this value correct ?

  • 0
    TI__Expert 3835 points
    Hi Kura,

    (1)

    VIT+/- nom is the nomial voltage which the sense voltage threshold will trigger a reset. For a sense voltage at 3.3V, this will either be +/- 4% or +/-7% depending on what part number you have. See Table 8 of the TPS3850-Q1 datasheet.

    For example, TPS3850H33QDRCRQ1 is a 3.3V sense voltage with a tolerance threshold of 7%. The VIT+/- (nom) would be 3.531V and 3.069V respectively.

    (2)

    This value is low. I will check this on my bench and get back to you.

    Thanks,
    Ethan
  • 0 in reply to Ethan T
    TI__Expert 3835 points

    Hi Kura,

    I have confirmed that the datasheet specs is correct. If the voltage is under 0.25 V than we guarantee a logic low. If the voltage is over 0.8 V, we guarantee a logic high. Any voltage in between is considered unknown and is an undetermined state.

    Hope this helps,

    Ethan