3 ms·
Decoupling capacitors need to be within a few mm of the integrated circuit consuming the power. It really doesn't matter if the voltage regulator has them or n
by jdsully 7y ago
Decoupling capacitors need to be within a few mm of the integrated circuit consuming the power. It really doesn't matter if the voltage regulator has them or not.
This is different than for bulk capacitors, but even those should still be on the same PCB assembly because connectors have higher resistance and this will limit their ability to handle transient surges.
- mbell 7y ago> It really doesn't matter if the voltage regulator has them or not. Not all LDOs are stable without external output capacitance in a particular range / ESR.
- jdsully 7y agoThe point is the LDO's capacitance or lack there of has no bearing on whether decoupling capacitors are required. Understanding that the capacitor and the trace form an RC circuit and that distance matters is what separates a professional from a beginner.