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'[EE]: Obtaining -12V @ 0.5A from 14.4V'
2002\10\03@021223 by Donovan Parks

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Hello,

I am looking for a circuit to convert 5V, 12V, or 14.4V (I have all of them available to me) to -12V @ 0.5A.  I have found several IC's that can convert these voltages to -12V @ 200mA or less, but only one that can handle the higher current.  Unfortunately, this IC only comes in SMT packaging and I am hoping to find something I can place on a breadboard.  I've explored the Maxim, National, and Linear Technology sites with no luck.  I've been looking at "switching regulators" - should I be looking for something else?

Thanks,
Donovan Parks

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2002\10\03@040033 by Mike Singer

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Donovan Parks wrote:
> I am looking for a circuit to convert 5V, 12V, or 14.4V
> (I have all of them available to me) to -12V @ 0.5A.
> I have found several IC's that can convert these voltages
> to -12V @ 200mA or less, but only one that can handle
> the higher current.  Unfortunately, this IC only comes in
> SMT packaging and I am hoping to find something I can
> place on a breadboard.  I've explored the Maxim, National,
> and Linear Technology sites with no luck.  I've been looking
> at "switching regulators" - should I be looking for something else?


34063A, 33063A as Voltage Inverting Converter.

Mike.

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2002\10\04@124856 by Nelson Hochberg

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> I am looking for a circuit to convert 5V, 12V, or 14.4V (I have
> all of them available to me) to -12V @ 0.5A.

www.st.com/stonline/books/pdf/docs/5257.pdf
MC34063 page 8

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