Question about DC/DC converter

[batistuta]

hi,guys

i have a question to ask. about dc/dc.

just as follows:

if i have a dc/dc(buck)converter, its input from 5.9v to 12v and output is 3.3v iout is 1A, but now if i change input voltage to 5v, and i also want get the same output voltage 3.3v and iout=1A, which circuit should make some changes??
i have some ideas, but not clear, so need your opinion,

thanks.

 

[Sayem Ahmed]

Re: ask a question.

You can look following page.It may help you.

 

[batistuta]

ask a question.

can anyone give more ideas???
thanks

 

[Audioguru]

ask a question.

You forgot to tell us which buck converter circuit or IC you have.
It might work or might not work with a lower input voltage. Its datasheet will tell you if it might work or not.