Bob Blick <bobblick <at> ftml.net> writes:
=20
> I'm looking for a switching regulator chip. Something inexpensive like
> the MC34063, but not limited to 100 KHz because I need to reduce the
> physical size of my layout, especially the inductor. Not having to use a
> current sense resistor would be nice too.
>=20
> The basic operating parameters will be 8V in, 3.3V out, at 1 amp.
>=20
> It doesn't have to be as cheap as the 34063, three times as much (US
> prices) would be OK if the rest of it were fantastic.

You did not say up or down converting. The sense resistor is optional but h=
ighly
recommended:

MCP1623/4 boost for single battery op. of mcus.
AL1603 as above but from Diodes
AP1533SG buck 300kHz 1.5A 8sop: ~$0.4
TL/LM2575 buck I don't have to explain this one
AP1609 boost counterpart of AL1603 300kHz

There are many many others out there. I shun 34063 because it requires bulk=
y
external parts, but there is a new 34063 variant which uses a higher switch=
ing
frequency and is otherwise identical. I just can't find it now, it may be
CMOS inside, even. All the above are available from Farnell/Newark and are =
under
$1 in 1s.


--=20
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