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LP 5900 SD 3.3V

Joanie Dalton
Prodigy 10 points
Other Parts Discussed in Thread: LP5900

Hello,

What happens to the LP5900 SD if  Vin is 6V?  Recommended Vin is 5.5V max however Vin max is 6V.   Also, does  TI have a regulator with the same or better Ultra Low noise performance - preferably one with 3 different 3.3V output voltages.

Thank you

 

  • 0
    TI__Intellectual 1780 points


    Hi Joanie,

    Vin = 6.0V is the absolute max value where as Vin = 2.5 to 5.5V is the operating range.

    If you apply Vin = 6.0V, the output will still be what ever you choose. For 3.3V part, Vout remains at 3.3V for Vin = 2.5 to 6.0V.

    However recommended Vin = Vout(Nom) + 1.0V. We guarentee all our datasheet parameters for this input setting.

    I see a lot of dual output low noise LDOs in our database. Could you provide more details of what output values and noise numbers you are looking for?

    Best Regards,
    -Harini :-)

  • 0
    TI__Intellectual 1955 points

    Joanie,

    Addition comments to your earlier question on 6V operation.

    Though if user has a 6V supply and no means to stabilized it down to 5V or 5.5V, which are the typ and max Vin operating values for which the electrical specs are specified, the part should operate fine nevertheless.   However, it will lose some safety net reliability operational margin.  That is if there were noise and/or spikes riding on the power rail either from coupling or injection from the operating environment (internal or external of the system), the part may exceed the Vin max limit spec. quite readily. Therefore,oOver time this may trigger in accelerated mortality rate or even result in permanent device damage.

    Regards,

    Kern