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TPS2663: Minimum Capacitance of Cin

Part Number: TPS2663

Dear Specialists,

My customer is considering TPS26632 and has a question.

I would be grateful if you could advise.

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The data sheet states that "a minimum capacitance of 1 µF is recommended for Cin",

Does this value take DC bias into consideration?

For example, TPS2663-166EVM only has 1µF (C1) connected to VIN_SYS.

DC bias is not taken into account.

It seems that simply 1μF is connected, is this enough? 

Could you please let us know how to select Cin.

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I appreciate your great help in advance.

Best regards,

Shinichi