Hi,
Can anyone tell me if there are any power sequencing requirements between the 1.8V logic/analogue supplies and the 3.3V I/O supplies for these devices?
I plan to use a small switching regulator for the 1.8V and run that and the logic supply off my system 3.3V rail via a load switch (very power sensitive app so won't be using the low power controls).
The regulator I'm planning on using is the LMZ10500 which appears to start in around 100us. Will application of the 3.3V I/O supply 100us before the 1.8V rail cause any problems?
I plan to hold the PDB pins low for a couple of hundred ms after enabling the power to allow things to settle.
Thanks
Craig