I'm using a LM317 with 0.1uF ceramic capacitors on the input and output. Would it improve its transient response and ripple rejection if I use tantalum capacitors instead of ceramic ones? What values should I use for input and output?
Thank you!
Regards!
Hello Nicolas,
Ceramic capacitors are better for transient response. A capacitor on the adjustment pin to ground helps both parameters.How much output ripple and transient shift are you observing? How much reduction do you require?
Regards,Ron Michallick
Regards,Ronald MichallickLinear Applications
TI assumes no liability for applications assistance or customer product design. Customer is fully responsible for all design decisions and engineering with regard to its products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning Customer's design. If Customer desires engineering services, the Customer should rely on its retained employees and consultants and/or procure engineering services from a licensed professional engineer (LPE).
I just want to use the better option because the certification tests for the equipment I'm developing are really rough. I want to filter in the best way my voltage source so I don't have problems in the certification.
Thank you.
Nicolas,
I tried different capacitors in the lab yesterday, The results looked best when the input capacitance was at least 1uF and the output capacitance was at least 10uF. I did not notice much difference between ceramic and tantalum.
Hello,
I want to use LM317 regulator but I am not allowed to use tantalum capacitors because of fiability issues, they are forbidden in my company.
Is it possible to replace output capacitor with a 10 uF Ceramic X5R capacitor like Murata GRM31CR61E106MA12 ?
Best regards
Oliver,
Yes, ceramic output capacitors can be used. That capacitor is OK to use.