About the recommended value of Cin of LDK320

[TYAMA.2]

About Cin of LDK320

What is the manufacturer's recommended value

[Peter BENSCH]

Welcome, @TYAMA.2​, to the community!

Cin is not critical, but should have at least 1µF. You can use electrolytic capacitors, tantalum or MLCC.

I would recommend a value between 1...10µF and position it as close as possible to the VIN pin.

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/Peter

[TYAMA.2]

Thank you for your reply.

What is the effective value of the capacity of the capacitor in this case?

[Peter BENSCH]

I do not understand the question.

Which case are you talking about and which capacitor do you mean?

Regards

/Peter

[TYAMA.2]

About Cin

When considering temperature characteristics, DC bias characteristics, etc.

How many μF or more do you need?

[Peter BENSCH]

As already mentioned: I would recommend a value between 1...10µF and position it as close as possible to the VIN pin.

Regards

/Peter

[TYAMA.2]

Is 1uF or more a value that takes DC bias characteristics and temperature characteristics into consideration?

Or is it the standard value on the data sheet?

[Peter BENSCH]

The recommended value of 1...10µF is considered the current effective value. Depending on the respective technology used to manufacture the capacitor and thus on the specified capacitor parameters, the development engineer should of course select the correct values.

If, for example, you already have a maximum tolerance of 50% over the temperature range, you have to use at least 2µF.

[TYAMA.2]

I understand.

Thank you very much.