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TPS74801: Vbias connect to Vin 3.3V for Vout 2.5V application

Randy Chen
Intellectual 2250 points
Part Number: TPS74801

Hi,

Customer would like to confirm if it is OK that Vbias connects to Vin 3.3V for Vout 2.5V application?

Best regards,

Randy Chen

  • 0
    TI__Guru 55940 points

    Hi Randy,

    A Vbias of 3.3 V will not meet the Vbias dropout requirement for regulation for a 2.5 V output.  As such you will be in dropout rather than have a regulated output.  It is recommended that Vbias be at least 1.6 V higher than Vout in order to ensure that you have enough headroom for regulation.

    Very Respectfully,

    Ryan