Circuit Project Electronic

I want mini size switching regulator,so it input voltage 9V to 3V Step-Down Converter circuit.
The LT1073 is good idea,it used for dc to dc converter.
if want it,please read in http://www.linear.com .
Vout 3V at 100mA, L1 100?H , D1 - Diode 1N5818 or equiv
Detail more,please in image.
Related Links
More circuit about dc converter step [...]

If you want DC converter 5V to 15V Step-Up voltage.
I like IC LT1073,It is important part of this circuit.
15V OUTPUT
100mA AT 4.5VIN
Detail more, Please read in this image circuit.
Related Links
More Circuit about Switching power supply
More Circuit about dc to dc converter
More Circuit about dc to dc converter [...]

Here is the switching regulator 12V,so input 5V to output 12V at 0.13A.
It is Step-Up DC Converter by IC LT1073-12 Micropower DC/DC Converter.
I very like IC by http://www.linear.com because it is very small size and good ic.
Related Links
More Circuit about Switching power supply
More Circuit about dc to dc converter step [...]