• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 64 subscribers
  • Views 608 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM2852: Are there any selection conditions for Cf ?

Honda
Intellectual 260 points
Part Number: LM2852

Hi All

My customer is using LM2852 for their production board,
and they are using GRM188R61A105K for Cf.
(They chose GRM188R61A105K from LM2852X Demonstration Board)

- LM2852XMXA-3.3 with GRM188R61A105K(Cf)
- LM2852XMXA-1.5 with GRM188R61A105K(Cf)


Then, they would like to chenge capacitor to small size, because delivery situation of capacitor became bad.

Are there any conditions to select Cf ?
They are worryied about especially DC Bias characteristics. (5Vin)

In other words, can LM2852 use GRM033R61A105ME15 for Cf ?

Please advice.

Best regards,
Honda

  • 0
    TI__Guru**** 191445 points
    Honda,
    There are no provided guidelines for choosing Cf and Rf other than following directly the recommended values of 10 ohm and 1.0 uF. You are correct to be concerned with DC bias. Personally, I always check it. I think the choice of gr033R61A105ME15 is not a good one. I would look for something that has at least 0.7 uF capacitance at your DC voltage.
  • 0 in reply to JohnTucker
    Intellectual 260 points


    Hi John

    Thank you for reply.
    I'll refer to you.

    ​Best regards,
    Honda