Neil,

 Just to be argumentative, if it is in fact a true drop in replacement,
 then external caps would be required.  At least when I use as 7805, I
 always add a 10uF to 20uF or so cap to the input, and a .01 uF and 10uF
 caps to the output for transient response, and an added bit of ripple
 reduction.   They may not be truly necessary, but I believe they can't 
 hurt.

 
                                              Regards,

                                                Jim







> There are a few different manufacturers of similar products, but they
> all  require external caps (at least I have not found any that does
> not).  My  intention is to use them on boards already designed for a
> 7805, as a true  drop-in replacement.
> 
> Cheers,
> -Neil.
> 
> 
> On Wednesday 03 May 2006 16:25, Diego Sierra wrote:
>> Hi!
>>
>> I'm going to resurrect my 78xx-switcher project.  In this case, 78SW05
>> -- a
>>
>> > small switcher circuit that will be a drop-in for a 7805, and NOT
>> > requiring external caps.  So far, I have designed it for
>>
>> Do you know about this switching 78xx replacements?, it only need the
>> caps.
>>
>>    http://www.recom-international.com/
>>
>> The AC/DC converter seems pretty cool too :-)
>>
>> Cheers,
>> Diego.
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