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Forum Post: Why the Synchronous Buck inductor dipped below sea-level (0A)?

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Dear sir,

Hi, there is a TPS5432 be used in my project.

The input voltage is 5V, transfers to output 3.3V/ 1A (peak-peak).

At the heavy load, the minimum inductor current was about 189mA.

But at the light load, I measured the inductor current dipped below "sea-level" (0A) (refer to below picture).

I'm not sure whether it's correct or not. 

Could you help to reply me asap? Thank you :)


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