On Mon, Sep 21, 2009 at 6:35 AM, David Duffy (AVD) wrote: > Are there any small, low-current, hi-efficiency switching regulators out > there that are still reasonably priced? I realise that a 78L05 is hard > to beat price wise, but are there good alternatives out there? > David... Not really for such a low power. With a canned solution the best you can hope for is around 30-60% efficiency. You can get better efficiency with something that is carefully designed for your application, but it's probably not worth the trouble. -- Martin K. p.s. The LM2931 is only good for 26v. You need to be sure that your 24v line is well protected. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist