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TPS826711: Cannot judge if additional input capacitors are needed or not

Shunsuke Yamamoto
Expert 7651 points
Part Number: TPS826711

Tool/software:

Hi team,

May I know if we need to add extra input ceramic or bulk capacitors in the usecase below? I cannot judge if they are needed or not in customer's situation..

Input voltage: 3.3V

Output voltage: 1.8V

Output current: 0.23A

Best regards,

Shunsuke Yamamoto

  • +1
    TI__Guru**** 150610 points

    Hi Yamamoto-san,

    For the typical optical module application, where everything is squished together on a tiny PCB, no other Cin is required.  There is plenty of additional capacitance present on the input bus, from other regulators, etc.

    Thanks,

    Chris