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Associate
September 29, 2023
Solved

LDL212PUR bypass capacitor requirements

  • September 29, 2023
  • 1 reply
  • 1193 views

Hi all. The data sheet for the LDL212PUR low dropout linear regulator does nor specify the quality of the input and output bypass capacitors with regard to ESR or loss tangent requirements.  Most LDO regulators require at least one low ESR bypass capacitor, usually on the output side.  This data sheet does not specify that parameter on any of the bypass capacitors.  Any recommendations?  
Thanks - SteveD

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Best answer by JFran.13

Any luck?
I'm selecting LDOs for a few projects but I can't understand how stable it's going to be with ultra low esr ceramic caps. I have this https://product.samsungsem.com/mlcc/CL10A226MO7JZN.do operating at 5V on the output and the same one in CIN for 6-8.4V.

1 reply

JFran.13
JFran.13Best answer
Visitor II
April 15, 2024

Any luck?
I'm selecting LDOs for a few projects but I can't understand how stable it's going to be with ultra low esr ceramic caps. I have this https://product.samsungsem.com/mlcc/CL10A226MO7JZN.do operating at 5V on the output and the same one in CIN for 6-8.4V.

SteveDAuthor
Associate
April 15, 2024

Thanks for the info.  It would be good though if the data sheet listed the required characteristics of the input and output caps