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LM5166: Quiescent current in dropout

Part Number: LM5166

I have a design which accepts an input in the range 10V - 24V, and must limit the output to 12V nominal, over a range of loads from 0 to 300mA.This is a low power application so quiescent current is important. I can tell from the datasheet what the device quiescent current will be in regulation, but I can't tell what current draw will be in dropout, at 100% duty cycle, in PFM mode.

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