At 11:15 AM 12/14/2010, you wrote:
>Hey all,
>
>I'm having trouble finding LDO linear regulators that can supply > 1 A at =
5
>V, so I'm thinking of stacking a few 250 mA or 500 mA regulators in
>parallel. I want to draw around 1.1 A or so.
>
>Is this a good idea? Is there anything I should watch out for?

You could use something like the MIC5157

http://www.micrel.com/_PDF/mic5156.pdf
Typical application on the first page is a 10A LDO.

But 1.1A is not a difficult task for a monolithic part.

Eg. Microchip MCP1827S-5002E/EB  (6V maximum Vin) dropout 0.33V at 1.5A
< $1 in 25's.

Micrel MIC29300-5.0WU (26V max Vin) dropout 0.37V at 3A, 200mV at 1A
< $3 in 25's.

etc.



>Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m



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