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What is the Dropout V?

dhlee

Aug 27, 2014
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Is this meaning just change Vin until Vout = 1.2V?
 

davenn

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Sep 5, 2009
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hi there :)

what part of Note 8 don't you understand ?
it pretty clearly states what dropout voltage it :)

but just in case you didn't,
say you have a linear regulator IC .... eg a 7805. and its dropout voltage is 2V
that means to get a reliable 5V out you must have at least 7V input, else it wont be able to maintain regulation
different chips have different dropout ratings some as low as 1V ( maybe a little less) others up to around 2.5V

Dave
 

dhlee

Aug 27, 2014
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Aug 27, 2014
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hi there :)

what part of Note 8 don't you understand ?
it pretty clearly states what dropout voltage it :)

Dave

I can't sure I cleary understood it.
Other datasheets use Vreference = 98% of Vout, but It doesn't
 

davenn

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Sep 5, 2009
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did you understand my explanation ? :)
 
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