Generate -+5V from 12V

vic · 2009-06-05T13:37:13+00:00

Hi,I need to generate a symmetric +/-5V supply from a single +12V supply. I need about 150mA from the +5V side, and less than 50mA from the -5V side.I've thought about using two 7805 in the following configuration : Supply + ----+--------[7805]---- +5 V | | `-[7805]----+------ 0v | Supply - ---------+------------- -5Vdoes it make sense ? Would it be OK for the 7805 to sink current instead of sourcing current, in the case of the 7805 in charge of the 0V supply ?If this idea is garbage, what would be the recommended solution to this problem ?Thanks.

Jun 05, 2009 60 Replies

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Jasen Betts 17 years ago

you need to authenticate to read, or post news.

jasen@gonzo:~$ telnet news.virginmedia.com nntp Trying 69.16.176.253... Connected to news.virginmedia.com. Escape character is '^]'.

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must be something else

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