Other Parts Discussed in Thread: TPS7A84A, TPS7A83A
Hi Team,
My customer is using TPS7A7300 for their application. And they would like to get specification of output voltage ripple < 3mV. As I know, this is simple to LDO.
But customer's test result is about 4.18mV in second image. The main low frequency noise is from power supply(first image) ,but I see the PSRR in datasheet, the noise should be eliminated. (third image is the 3.3V input for TPS7A7300) and another high frequency causes the output ripple higher than 3mV.
1. Could you brief explain that how does the noise generate?
2. How to eliminate it, both low and high frequency noise.
If noise isn't related to our device, but related their probe or measurement, please help explain it.
3. Could we use TPS7A84A to get higher performance?(<3mV) I saw the datasheet, they are P2P, is both of them pin compatible?
Thank you for your support.