Hi there,
I am using the TPS22990 to disconnect power to a DUT when a switch is opened. The supply connected to VIN will remain on when the switch is opened. There is no issue with this use case
I also have another use case that requires the DUT to be power cycled by a host which is done by turning the power supply connected to the TPS22990 OFF and ON. In this instance VON of the TPS22990 will remain high while VIN will drop to 0V. VBIAS will also remain powered. VIN will then switch back on. Is this okay?
Simulation shows this situation to work okay, however I see a much faster rise time at VOUT. It looks to track VIN (the power supply has a turn on time of 5us), whereas in the other use case the rise time is ~30us. This faster rise time is not an issue for me. I am just wanting to check that this use case of the TPS22990 is valid and that there is no known reason why I can't use it in this way?
My design:
VBIAS = 5V
VIN (when supply is on) = 1.6V - 3.6V
VON = 0V (OFF) - 5V (ON)
Thanks a lot for your help,
Craig.
