Simple Buck Converter Question

[jeff77789]

What is the dropout voltage for a LM2596 DC to DC buck converter?

for 5v 7805 voltage regulators i know that the output voltage drops around 6-7v depending on the regulator

but what about buck converters? does it work in the same way? does it even have a "dropout voltage?"


thanks!

 

[davenn]

most of them are lower dropout voltage

google LM2596 and get the datasheet, it will telly you everything

Dave

 

[(*steve*)]

If one looked at the datasheet, one might notice a graph showing the dropout voltage (page six, bottom right corner from memory).

Note that dropout voltage is input - output, so in the case of the 7805, you are quoting 1 to 2V (I have no idea if that's correct, but I'd be dubious about the lower limit without checking the datasheet)

 

[jeff77789]

thanks guys, wasnt quite sure how to read the graph at first lol but for me i think my voltage dropout would be around 1v if not 0.5v-0.8v