How to get 0.3V DC power from 3.3V ?

[sita]

Hi friends,

In my power supply deisgn section, I need a 0.1V DC power from 3.3V. Is there any way out?

Suppose if there's no way to get 0.1V. Is there any way to produce 03V from 3.3V?

Regards,
sita

Added after 1 minutes:

sorry, I need 0.3V from 3.3V

Please do suggest any other methods other than Voltage divider

 

[rkodaira]

Re: Need a 0.1V

Some schottky diodes have forward voltage around 0.3V. You may have to select one that matches exactly 0.3V.

 

[sita]

Re: Need a 0.1V

Thanks friend.

I have chosen OA79 which provides 0.47V and changed design slightly. There was some time limitations and I doubt whether Schottky diodes will be available in local stores!

But please do inform me if there's such a kind

Regards,
sita

 

[rkodaira]

Re: Need a 0.1V

But please do inform me if there's such a kind

Try the very common 1N5817 to 1N5819 series schottky diodes. They present maximum forward voltage of 0.34V at 0.1 A forward current. Typical curve present 0.3V @ 0.15A

Connect a 20 ohm resistor in series with the diode and a 3.3V voltage source. The forward voltage should be around 0.3V over the diode.

(3.3 - 0.3)V / 0.15 A = 20 ohm

 

[FvM]

Re: Need a 0.1V

Cause you didn't tell any requirements, it's impossible to give an exact suggestion. For reference voltage, I would used a divider with a buffer. For power supply, an usual adjustable regulator with additional circuitry to lower the output voltage could be used.