Hi With modern high frequency switchers, often a LC filter between the switcher and the LDO does the trick. The gotcha is that not all the energy is conducted. Radiated energy quickly becomes the issue….
Depending on what you are timing that may be more or less of an issue. 10 MHz distribution is one thing that really does not like the > 1 MHz stuff that the newer switchers put out. Bob On Nov 22, 2011, at 12:44 PM, David VanHorn wrote: > > In imaging systems, where the noise on the pixel supply was critical, I had > good luck using a buck switcher followed by an LDO, whose maximum PSRR point > determined the operating frequency of the switcher. All normal techniques > for removing SMPS noise still apply. > > I used the ISL9000 > http://www.intersil.com/products/deviceinfo.asp?pn=ISL9000 since it had the > highest PSRR that I could find. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
