Issue:
On startup (before uC has turned on) there is an oscillation in current limiting to the 5v switched rail, due to the fact that at that point the POWER_SW enable line is floating
Potential Solution:
Add a pulldown (~10k) to this line in order to ensure operational state during power up and power down events
Testing:
No pulldown (input power supply @ 3.3v)
With pulldown (input power supply @ 3.3v), note lack of ringing after initial inrush, before device is controlled by uC (~+16ms)
Issue:
On startup (before uC has turned on) there is an oscillation in current limiting to the 5v switched rail, due to the fact that at that point the
POWER_SWenable line is floatingPotential Solution:
Add a pulldown (~10k) to this line in order to ensure operational state during power up and power down events
Testing:
No pulldown (input power supply @ 3.3v)
With pulldown (input power supply @ 3.3v), note lack of ringing after initial inrush, before device is controlled by uC (~+16ms)
