Hello,
in a special application (current pulse output) I have to reduce the Input capacitor of the TPS7A49 to 47nF to achieve a low rise time (Circuit see attachment). I have tested the LDO with 47nF without stability problems (5 Boards). To determine the minimum required capacity I have also tested 18pF and also in this case the LDO has been stable. I do not have high requirements regarding the noise. The noise performance with 47nF is sufficient.
In the datasheet min 10µF are recommended. Can I also use 47nF when I sufficient with the noise? The important thing is that we don’t not have stability problems in mass productions.
Thanks!
Daniel