Re: +5 to -5 charge pump thingie

From: Spehro Pefhany (speffSNIP_at_interlogDOTyou.knowwhat)
Date: 02/28/05 

Date: Sun, 27 Feb 2005 20:06:47 -0500

On Sun, 27 Feb 2005 16:14:07 -0800, the renowned John Larkin
<jjSNIPlarkin@highTHISlandPLEASEtechnology.XXX> wrote:
>
>Yeah, that one should work with ceramic caps.
>
>Your other problem, in the 1-amp range, is trickier. One of our
>products uses an LM2596 ($1.80 at 1K) in the weird upside-down config,
>where -Vout is the chip ground. We use a standard Talema inductor, 68
>uH, 3A, another $1.33.

Thanks, that's better than the 2576 and compatible- the output cap
should be a lot smaller with the higher frequency. Good enuf.

>Thanks, everybody.
>John

Thank you, I didn't realize the low end ones were that cheap these
days.. $260 for a reel of 1K of the low current ones. Nice if you need
a taste of -V for a front end or whatever.

Best regards,
Spehro Pefhany 

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