P
Pimpom
- Jan 1, 1970
- 0
I know that, to ensure stability when using a standard 3-terminal
regulator, the output capacitor should be placed as close as
possible to the regulator. Usually this is no problem. But I'm in
the middle of a PCB design in which it's more convenient to have
slightly over an inch of track between the two. This is on both
the hot and the ground sides. The tracks are shared by load
currents of a few mAs. Part of the load is a CMOS counter IC
operating at a few kHz while another section has further RC
filtering on the supply. Is this likely to cause problems?
I'm asking here instead of simply trying it out because I have to
make a dozen of this circuit. Even if the test unit works, I
won't know if it's only marginally stable and I don't want to
risk having some units or future replacements go unstable.
regulator, the output capacitor should be placed as close as
possible to the regulator. Usually this is no problem. But I'm in
the middle of a PCB design in which it's more convenient to have
slightly over an inch of track between the two. This is on both
the hot and the ground sides. The tracks are shared by load
currents of a few mAs. Part of the load is a CMOS counter IC
operating at a few kHz while another section has further RC
filtering on the supply. Is this likely to cause problems?
I'm asking here instead of simply trying it out because I have to
make a dozen of this circuit. Even if the test unit works, I
won't know if it's only marginally stable and I don't want to
risk having some units or future replacements go unstable.