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.

LMR16030: LMR16030S in light load situation with bad SW pulse

Part Number: LMR16030


   could you help to comments on whether below SW waveform is normal when LMR16030S work in light load mode.

   below is the waveform.

1. does it make sense?

2. the reason that cause the spur before pulse.

  • Hi Shuang,

    At DCM condition, the inductor will resonance with SW node parasitic cap after inductor current decrease to zero, that's why you see the ringing before HS turn-on.

    Pls check the SW waveform at higher load current to see if the duty cycle is stable.

    B R