Low-parts high voltage MOSFET regulator

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Hi,

I wanted to create a simple, low parts count series pass MOSFET regulator and I simulated this using LT Spice.

According to the simulation, it should work.

However, I would like to ask for your opinon if this can be simplified further (or improved with no major additional parts) with the goal of both load and line regulation.

TIA!
 

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Joined 2005
For low drop: output voltage not so big voltage difference with input stage you have no problem. But for big difference you will have big power dissipate at your fets like normal resistor = high temp = loss power. You can calculate the heat as loss power, imagine as a soldering iron as comparation.
 
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