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C__B
Mar 19, 2007, 10:12 AM
Does anyone know how to make a voltage regulator? :confused: I posted a question in the AP section about why a single cell lipo would make my camera act funny and shut itself off. The answer I got was that it was to much voltage. The regulator needs to have an output of 3.4 volt powered by a single cell.

Acetronics
Mar 19, 2007, 10:24 AM
Hi,

Just some VERY useful reading ...

http://www.micrel.com/_PDF/App-Hints/ah-20.pdf

I did some supplies from here .... and just can say : Works perfectly !!!

Alain

Daniel7866
Mar 19, 2007, 10:49 AM
You can drop about 0.3V to 0.7V from your cell with a diode in serie.

Daniel

mem
Mar 19, 2007, 11:07 AM
If you need the voltage regulated, here is a low dropout 3.3 part that you may want to look at also: http://www.sipex.com/Files/DataSheets/sp6200_6201.pdf

rmteo
Mar 19, 2007, 12:28 PM
For what you want to do, take a look at this:
http://www.enpirion.com/products/EN5312Q.asp

Integrated Inductor
1 A continuous output current
2.4 V to 5.5 V input range
Up to 95% peak efficiency

Excellent transient response, low ripple
Requires two MLC filter capacitors (0805)
3-pin VID output voltage programming
4 mm x 5 mm x 1.1 mm QFN package
Fully RoHS compliant and Pb-free manufacturing line compatible

Tiny Footprint Simple Layout, Easy Design
Low Part Count Excellent Transient Response

Pinecone
Mar 19, 2007, 07:56 PM
3.3 volt:

http://www.dimensionengineering.com/DE-SW0XX.htm

Adjustable:

http://www.dimensionengineering.com/DE-SWADJ.htm

vintage1
Mar 19, 2007, 08:13 PM
a transistor with based and emitter connected will drop about .5v reliably..tends to be a bit more reliable than just a diode.