Hi every body In STm32f407 discovery board there is LD3985M33R regulator which the output is 3.3v but in schematic that ST has released it is labeled by 3 volt why? I know LD3985M30R output is 3v not LD3985M33R

[Yas Yasin]

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[Bob S]

Because "3V" is "close enough"? :) Actually because there is a series diode between the 3.3V regulator and the "3V" net (a BAT60), and the diode drop is nominally 0.3V.