Other Parts Discussed in Thread: TPS5420, TPS5450
Tool/software: WEBENCH® Design Tools
Hello,
We've been using the TPS5420 successfully in various designs but need to move to the TPS5450. We are having trouble getting stable voltage from the unit with the parts we have chosen. We went back to Webbench and bought its recommended parts for our parameters (24v in) and we still have the same issue, when the input rises above 7.5v , the output starts to rise as well. From 5.5 to 7.5v the output is stable at the desired voltage of 3.3v, then for every 1 volt input increase , the output goes up about 0.5v. Which component would most likely affect this? I tried a couple different inductor values but the situation remained.
Jeff