This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM25119: The ripple of the output current increases in a specific interval

Part Number: LM25119

Hello,

I have a problem with LM25119.

Input voltage:12V 

Output voltage:0.9V\1.8V\3.3V

Load current test range:0-30A

I changed the voltage by changing the FB resistance and then carried out the load test.

I found that when the voltage is 3.3V and 1.8V, the output voltage ripple will increase to 150mV when the load current is 6-10A.

But when the output voltage is 0.9V, the output voltage ripple will not increase.

I tried adjusting Rcomp and Ccomp, no improvement.

I tested the waveform of HO2.

Does anyone know why this is?