[Buck converter controlled by a microcontroller]

Hello,

Here is a graduation project to have 10 volt input into a buck converter (step down), where the output is connected to the microcontroller through ADC as a feedback, so any variations of output (load change or whatever) than stated by the reference set by the user the microcontroller should adjust it and display output signal and status on a graphic LCD.

Anyway, I hope you can suggest a good buck converter design where the microcontroller can control the output through the pulse generated for switching of the converter.

Many Thanks

[Portable Power]

yes actually, it has an HDD and MMC to be activated with.

I was having ideas of buck or boost converters, but still I need to keep searching.

[Portable Power]

First of all, thanx for EVERYONE in helping me out in designing a good circuit 5 to 3.3V

[5 volt to 3.3 volt]

I want it for minimum 70mA, and yet doesn't get affected much by loading effect.
Many Thanks

[5 volt to 3.3 volt]

I would like to know any ideas of the simplest circuit to convert 5 volt dc into 3.3 volt dc.