I have been working on a project and one of the ideas was to control the power supply by push button. In a normal case, the SW1 is open, the 5v_POWER supplies the 5V_IN; when the SW1 is closed, the 5V_IN is cut off. My solution is to use a PMOS SSM3J328R and a normal-off-momentary-on push buttonPMS9P1B10M2QE to implement the manual temporaray power-off feature. The rated current is 2A. I have googled for a high side switch circuit but so far I haven't found a proper solution for this scenario. Is this going to work or do I need something else to make this work? Thanks in advance.
R7-C4 have a time constant of only 18 us. This is not nearly long enough to act as a debounce network, so what is the purpose of these components?
I would place C4 in parallel with R8, and delete R7. That increases the debounce time constant to 1 ms. If this still is too short, increase C4 up to 1 uF, then start increasing R8 until you get the performance you want.