I order stuff from www.mouser.com and get it in 2-3 days
Go to maxim's homepage and do a search for the MAX774...-5v at 1 Amp inverting switching regulator. Page 10 of the data sheets has some usable schematics, although some of the parts may be a bit hard to find...but then every power supply I have looked at has had had hard to source parts...
p.s also look at www.sproggy for other ideas
[This message has been edited by AussieGuy (edited 03-06-2001).]
Originally posted by AussieGuy:
Go to maxim's homepage and do a search for the MAX774...-5v at 1 Amp inverting switching regulator. Page 10 of the data sheets has some usable schematics, </STRONG>
Im planning on using this chip for my -5V but page 10 shows 3 schematics. Which one should I use? something about bootstrapping or not. Heres the link to the schematics: http://pdfserv.maxim-ic.com/arpdf/MAX774-MAX776.pdf
thanks in advance.
PS I cant get -5V from my power supply as im using a laptop
Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
"If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."
I would suggest non-bootstraped mode. -5V to ~14V is 19V difference and one pin has a 21V limit. thats close. to close for me to feel safe.
I personally use Digikey.com as my parts source. I perfer the parametric search abilities over mouser.
FYI parametric = sorting and filtering by multiple part spec's simultaniously (i.e. voltage, value, package tolerance, etc.)
Also i had problems finding the 774 in qty less than 1000 so you may want to get a sample for free from maxim. just make up some $h!t and they'll send a few to you. its worked many a time for me.
PS. I'm EE so hit me up if you have Q's.
The ultimate CarPC - Wow!
holy crap, talk about digging up old threads...
what were you searching for to find this?