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transistors (as switches) in charge pump converter, should be LINEAR or SATURATION?

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allennlowaton

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good day guys...
In my charge pump converter simulation, I found out
that few of my transistors (in my capacitor and switches network) are operating in saturation.
I believe that it should only be just LINEAR or CUTOFF.

What are the possible implications on this?

Below is the circuit for the capacitor and switches network:
13_1291353050_thumb.jpg
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Thank you....
 

Your image doesn't open.
 

mdorian said:
No , to minimize the power consumption they must be saturated or cutoff .
Click to expand...

But during saturation, Vds of the transistor is greater than the Vds during linear.
With that, I believe switches (transistors) should be in Linear.....
 

You want to move as quickly as possible between linear (on)
and "off" because these are your two (almost) non-dissipative
states. If efficiency roll-up is primarily driven by switch
conduction losses, which is not to be assumed in a capacitive
charge pump.
 
hello dick_freebird...
I got confused with your statement.
Do you mean my desired state is LINEAR or CUTOFF and I need their transition to be pretty fast?
sorry if I can't easily grasp what you've tried to say.
 

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