I'm keeping the same trace thickness and layout as the original(somewhat). Since i asked that question i put every trace that i could on the other side which meant i had to use vias on the power traces but now i have a more or less uninterrupted ground plane.
If the vias have to carry any sizeable currents, I suggest using Z-wires on them. A Z-wire is a short piece of tinned single-strand wire inserted through the via and bent over on both sides of the board, onto the traces the via connects together. The wire is soldered to both traces. The wire ends up having a sort of Z-shape when used this way, hence the name.
LDO's are a very different breed of cats regarding stability requirements, and there is no guarantee they are compatible with the X-noisers. At the very least, adaptations of the compensation would be required.
I think that here and there in the thread, other regulators, including LDO have been tested, in sim at least.
It would have to be tested, in sim first if a model is available, and then on a breadboard. It would be foolish to commit to a PCB without these precautions
I think that here and there in the thread, other regulators, including LDO have been tested, in sim at least.
It would have to be tested, in sim first if a model is available, and then on a breadboard. It would be foolish to commit to a PCB without these precautions
"At the very least, adaptations of the compensation would be required."
Pay attention to Elvee's statement.
The filter capacitor in an LDO is in the feedback loop, and its value and ESR affect stability.
Many of the Analog Devices (and Linear Tech) Low Dropout Regulators have test fixtures in LTSpice. You can test for stability by this method:
https://www.omicron-lab.com/fileadm...ote_Traditional_NoninvasiveStability_V3.0.pdf
Pay attention to Elvee's statement.
The filter capacitor in an LDO is in the feedback loop, and its value and ESR affect stability.
Many of the Analog Devices (and Linear Tech) Low Dropout Regulators have test fixtures in LTSpice. You can test for stability by this method:
https://www.omicron-lab.com/fileadm...ote_Traditional_NoninvasiveStability_V3.0.pdf
Here's a tutorial -- the "LDO Tunnel of Death" on page 19. https://www.tij.co.jp/lit/an/slva072/slva072.pdf another source of info at TI is application note SLVA026.
There was a National Semiconductor application note (before they were acquired by TI) which explained in more concise terms.
There was a National Semiconductor application note (before they were acquired by TI) which explained in more concise terms.
