I've had some success with Microchip's own 1253 charge pump
regulator, and even better with the 60210 series from TI.  They
only require caps, no inductors or diodes, and the 60210's are very
low noise and fairly high efficiency.

Of course I don't remember off the top of my head exactly how
loow input voltage they range, but worth a look!

Mike H.

> > But you'll have GREAT sucess looking at National, TI, and
> > Linear Technology for step-up switching regulators. I'm using
> > a 1.5V to 5V step-up switcher than works like a charm; but
> > there are so many I won't make a recommendation.
>
>Which one do you use? Which one not to use?
>If low current is needed, do you have an opinion about using charge
>pumps with capacitors or DC-DC with inductors instead?
>
>
>Regards,
>Moises Cambra
>
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