Capacitor based backup for brief loss of power in memory stick | Cypress Semiconductor
Capacitor based backup for brief loss of power in memory stick
I am using the CY7C68033 USB Controller Chip to create a simple USB memory stick (1-NAND chip). It has an additional function that it provides a One-Time-Password per power cycle. I want to stop a brief turning off of the power to the USB port to cause a power cycle.
I am not an Engineer and I simply used the reference schematic using the TP378833 voltage regulator. I am “hoping” that I can simply add a RC circuit to the device to provide a brief (~3 second) guard against this. I was hoping someone could tell me first if this is feasible and second, do I put it before the regulator or after and will it effect power consumption? I am thinking of using a 300 uf Cap but don’t know what resistor would go with that.
The memory stick is very thin as it looks like a House Key so batteries etc are not an option.
… Or am I being paranoid :-) ?