need 3.3V LDO volt reg SMD with reverse polarity protection

[Admin]

I'm having serious trouble finding a:

voltage regulator
surface mount
3.3V
200mA+
low voltage drop LDO
reverse polarity protection
thermal shutdown

Anyone know of a part number they can point me to? Mouser/Digikey don't include reverse polarity in the search option and I've gone through tons of datasheets already . . .

[izua]

what about switching mode regulators? they don't do anything if you drain current out of the input (as far as i know and tested), are efficient and most have thermal shutdown.

lm2576 comes in both smt and th versions. the downside is that it needs a few parts around it, and only this combination assures the rev polarity protection.

[fuzzyt]

Not sure it covers reverse polarity protection, but everything else seems to be in order...

http://www.st.com/stonline/books/pdf/docs/2572.pdf

[TrickyNekro]

I think Schottky diodes have a drop down voltage around 0V15 to 0V45....
That will do... unless you are so space and cost restricted....

[want2learn]

Have you looked at Micrel's website http://www.micrel.com/index.do
They have a regulator which probably suits your needs 'MIC5209-3.3YM' . As far as I can see it meets all of your needs and is available in a couple of different SMD packages.

As for where to buy, you can check the availability on their website.
The only place I looked was (the dreaded) Digikey. Their prices aren't that bad but I've got to agree with your comments about their nosey policy

Sorry I don't know how to post those fancy links I see others using

[Admin]

thanks want2learn!!!

The MIC5209-3.3YS seems to be *exactly* what I was looking for.

futureelectronics.com appears to be selling them at $0.69 each.

[pomprocker]

aww man I just came back to this post to tell you about Micrel too. Guess I'm too slow