fast switched voltage regulators

[Goddard, Duncan]

>>>All right, I'm looking for a tiny switched power supply chip
> with internal power transistors (not more than 1 or 2 Watts
> required) with the highest switching frequency available,
> and with external control of the output voltage.<<<
> 
you don't specify input- mains or d.c.? variables are hard to come by, and
the catalogue I have at work doesn't list operating frequency amongst the
parameters. but then, this catalogue is aimed at people who just need 12's
and 5's, not weirdos like us.
whatever- the same six names come up over and over, with a huge variety of
smpsu's and dc converters in all manner of packages from 4-pin sil upwards.
these are they:

traco power products
newport components
astec
lambda (formerly coutant lambda)
mascot
ems (honestly!)

traco and newport seem (as far as this catalogue- rs components- is
concerned) to have the small end of things sewn up between them. one of the
newport devices (nms0515) will turn 5v dc into + and - 15v dc at 67mA each;
it's rated at 2W and it says the output is unregulated. the thing costs £20!
is this the sort of thing you're looking for?

d. 


***************************************************************************
CONFIDENTIALITY NOTICE

The contents of this e-mail are confidential to the ordinary user
of the e-mail address to which it was addressed, and may also
be privileged.  If you are not the addressee of this e-mail you may 
not copy, forward, disclose or otherwise use it or any part of it
in any form whatsoever.
If you have received this e-mail in error, please e-mail the sender
by replying to this message.

MTV Networks Europe
*****************************************************************************