q0w1e2r3
Junior Member level 1
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i tape out one PMU chip and when it coming back , i find in one boost dcdc the output ripple is so big , and seems not stable, please see the waveform of test.
i wonder if it is system loop stability issue ,and what is the root cause, can you give me some suggestion?
BTY, the simulation results and small signal model caculation shows the system is stable and PM>60degree, so i am so confused.
i wonder if it is system loop stability issue ,and what is the root cause, can you give me some suggestion?
BTY, the simulation results and small signal model caculation shows the system is stable and PM>60degree, so i am so confused.