Other Parts Discussed in Thread: TPS3700, TPS3701
Dear Sir,
Customer would like consider TPS3702 and pls help to check it,
-do you need to detect a DC voltage fall, or do you need also to detect AC events that fall outside the +-5% tolerance window?
[customer] It should be able to detect both DC and AC events that fall outside the tolerance window.
-Do you define this a fault because the 5% is the voltage tolerance of the load?
[customer] Yes. just found I miss to attach the picture. Please see below, the monitor detection range should not overlap the normal power IC operational output range, but also has to within the load voltage range.
For example, assume a DDR power rail may requires +/- 5% tolerance and a Power IC set to center with output +/- 2.5% tolerance. This leaves the monitor with maximum tolerance +/-1.25%. This is how I get the target tolerance for the monitor IC.
-has your application heavy load transients?
[customer] Yes, heavy load transients may happen. They are for core power such as CPU and DDR.
I would like to learn more about the voltage monitor. I might need to monitor 3~4 voltage rails with typical voltage(1.2V, 1.35V, 1.8V, 3,3V). I found TPS3702 is a good choice that no need to add external resistance. However it doesn’t support 1.35V rail monitoring and adding 3~5 monitor
Thanks, Ian.
