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Thread: 2-tran boost circuit; 5v -> 13v
www.piclist.com/techref/index.htm?key=tran+boost+circuit
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face BY : Wagner Lipnharski email (remove spam text)



Sometimes I understand the effort for the search the best possible solution
using the simple components. But also, sometimes I suggest to move and use
actual available technology, something that, by the way, is just here based
on our own requirements and demands for a better and easier solution.

The MC34063 is a switching regulator, one of the best price/performance I
ever used. By less than 75 cents a piece, it is very difficult not to think
about to use it. It is almost the cost of coulpe of zener diodes. Output
switching current in excess of 1.5A, working from 3 to 40V, with a
regulation around 2% (better than most 7805 around). Step up, Step down.
What else do you need?

VIN
o--o---RLIM--o-------L100uH------o---|>|--o----o--->
    |        |                   |        |    |
    |        |        .-------.  |        |   _|_
    |        |        |       |  |        R   ---
    |        o--R180--8       1--'        |    |
    |        |        |    FB 5----1.25V--o    |
    |        '--------7       |           |    |
    '-----------------6       3--.        |    |
                      |       |  |        R    |
                      '-2---4-' _|_       |    |
                        |   |   --- 1nF   |    |
                       _|_ _|_  _|_      _|_  _|_

http://www.st.com/stonline/books/pdf/docs/5257.pdf

Wagner Lipnharski - email:  spamwagner@spam@spamustr.net
UST Research Inc. - Development Director
http://www.ustr.net - Orlando Florida 32837
Licensed Consultant Atmel AVR _/_/_/_/_/_/


Roman Black wrote:
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Subject (change) 2-tran boost circuit; 5v -> 13v

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