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Original question:

TPS763: How to select output capacitor ?

TPS763-Q1: Low ESR Ceramic Capacitor as Output Capacitor.

Igor Kuksin1
Prodigy 180 points
Part Number: TPS763-Q1

Dear TI Team,

could you please help to clarify following question.

We would like to use the Ceramic Capacitor with Low ESR as output Capacitor for TPS76301-Q1 LDO (the ESR plot of the capacitor to use below).

According to datasheet the ESR of the output capacitor must be between 0.3 Ω and 10 Ω.

To meet the LDO output capacitor ESR requirements, the e.g. 1 Ω resistance should be added to the output capacitor in series.

Did I correctly understand that from the datasheet?

Does it important how resistor will be connected: - between the capacitor terminal and GND; - between the capacitor terminal and Vout LDO pin?

Thanks for help and looking forward to your answer.

Best Regards,

Igor Kuksin

  • 0
    TI__Mastermind 43580 points

    Hi Igor,

    You have interpreted the datasheet properly. The series resistor is placed in series with the output capacitor between VOUT and GND.

    Note: if you are looking for a newer device that works with ceramic capacitors, we have the TPS709-Q1.

    I hope this helps.