Ahh...your right.  I looked at one datasheet but it must have been the DPAK or TO220, not the TO3 since it was stating 1A on those.  Yep, two extra resistors isnt a deal breaker. 


--- On Mon, 10/20/08, Byron Jeff <byronjeff@clayton.edu> wrote:

> From: Byron Jeff <byronjeff@clayton.edu>
> Subject: Re: [EE] wanted: 18V linear regulator for more than 1A
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> Date: Monday, October 20, 2008, 7:27 AM
> On Mon, Oct 20, 2008 at 02:17:34PM -0400, alan smith wrote:
> > 
> 
> > Yes..I know a switcher will do the job, but there are
> reasons for using a
> > linear in this application (low noise, RF, AF).  And
> its not my design,
> > I'm just trying to circumvent the power problem
> before it becomes an
> > issue.
> 
> > 
> > The good ol 7818 and such in the TO-220 package are
> only rated to 1A, but
> > I need closer to 2A.  Anyone know of a device, doesnt
> have to be that
> > package, that can go upwards of that current load?
> 
> Get a LM317 in the TO-3 metal can. Only requires two extra
> resistors to set
> the voltage and is rated up to 5A with heatsinking.
> 
> BAJ
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