player80
Full Member level 2
Hi,
I'm using a TPS54528 voltage regulator to get an 1.05V output, the input is 5V.
However once I apply some load (eg. 1.5 Ampere) I get a 16khz spike on VIN (the closer I go to the chip pin the bigger the spike will be).
So since it's 16khz it will result in a high noise, and since some other regulators are also attached to the 5V rail their capacitors will also pick up that noise it seems.
The 16khz spike is converted to audible noise by the ceramic capacitors, it gets stronger if I press a screwdriver against the component.
Does anyone have an idea how to dampen the noise around the regulator? I have added a ferrite bead to it but it seems like the 16khz spike is just converted to more noise that is backfiring.
I'm using a TPS54528 voltage regulator to get an 1.05V output, the input is 5V.
However once I apply some load (eg. 1.5 Ampere) I get a 16khz spike on VIN (the closer I go to the chip pin the bigger the spike will be).
So since it's 16khz it will result in a high noise, and since some other regulators are also attached to the 5V rail their capacitors will also pick up that noise it seems.
The 16khz spike is converted to audible noise by the ceramic capacitors, it gets stronger if I press a screwdriver against the component.
Does anyone have an idea how to dampen the noise around the regulator? I have added a ferrite bead to it but it seems like the 16khz spike is just converted to more noise that is backfiring.