I designed a chip with 3.3v/5v process. The digital part is working with 3.3v.
but the analog part need 5v power source, How can I raise the signal of digital output from 3.3v to 5v? Is there any good suggestion?
I tried a simple inverter. Though it can work, the pmos could not be shut down since the input is only 3.3v. There is some static current there. Is there any better method?
Instead of trying to boost the 3.3V, Simple method is to use a 5 volt for one section and then drop it to 3.3volts for use with another section. Dropping is easier than boosting. Good luck.
yes, that's right. But my analog part need 5v dynamic range, so the switch signal have to be 5v. And my digital library use 3.3v circuits. There's no way for me to reverse it.
you can use what is called a step-up dc dc controller
there are various manufacturers of such chips
you need a diode and an inductor also.
see for example maxim's chip
**broken link removed**
yes, that's right. But my analog part need 5v dynamic range, so the switch signal have to be 5v. And my digital library use 3.3v circuits. There's no way for me to reverse it.