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LMR14006: Capacitor selection for feedback pin

Takeshi Sasaki
Expert 4480 points
Part Number: LMR14006

Hi team,

Could you give me advise on how to answer the following customer question? The customer has seen schematic with a capacitor is connected to the feedback pin, but they're not sure how to select it and its requirement. Also, they don't have plan to mount any capacitor, but just put place holder just in case. 

<Customer question>

Could you tell me how to select capacitor in following schematic?

Thank you for your support.

Best regards,

Takeshi Sasaki

  • 0
    TI__Mastermind 27045 points

    Hi,

    LMR14006 is designed to use ceramic output capacitor, capacitor on low side feedback resistor is only required when electrolytic capacitor with high ESR is used on output.

    Just as start point, use below to calculate capacitance:

    C=Cout*ESR/(3*(R1//R2))