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Original question:

TPS7A54: Bias supply

TPS7A54: TPS7A54 bias function

Brian Chan
Expert 4870 points
Part Number: TPS7A54

Hi Experts

datasheet tell us.  bias can improve dc and ac performance 

I wonder how does bias work to improve it.

Best

Regards

Brian

  • +1
    TI__Mastermind 48625 points

    Hi Brian,

    BIAS helps improve AC and DC performance when VIN ≤ 2.2V because it provides proper headroom to the internal circuitry when the main supply (VIN) is not sufficiently high. Once VIN is sufficiently high (i.e. > 2.2V), the internal circuitry has the proper headroom from VIN itself and hence BIAS is not required for this case.

    Regards,

    Nick