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LMR33630: Cause of negative inductor current in LMR33630

Part Number: LMR33630

LMR33630 is used to generate 3.3V from 3.8V with 50mA load. A negative inductor current is observed during switching. 

1. Can this negative current impact stability of the module?

2. What is the cause for negative current observed. 

  • Hello, 

    The negative inductor current is due to the low side MOSFET turning on to recharge the CBOOT capacitor since you are operating at light load and near dropout. 

    This is expected behavior and doesn't impact the stability. 

    See note 3 underneath the Electrical Characteristics table. 

    Regards,

    Harrison Overturf