I had incredible luck with National's 50Khz series , LM2576 in D2T mode. It
never gets warmer than 30C, and is 95% efficient, even operates down to
bottom+1V! NO heat. A wonderful part. Be careful to use the inductor they
recommend, to prevent flux saturation.

It will still be working into the next century.

--Bob

At 03:24 PM 6/4/2003 +0100, you wrote:
>Hi
>
>As part of a battery charging circuit I need to regulate the current. The
>problem is I cannot lose the heat in the hand held device so need to use a
>Switch mode Current regulator. I have found them to be very thin on the
>ground. Can anybody recommend one?  It needs to be capable of about 1500ma
>at 5V (I am charging 4 AA NIMH batteries)
>
>
>Many thanks
>
>
>Tim
>
>--
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