Load Regulation: 11mV/A*
Line Regulation: 44.53uV/V**
Dropout Voltage: ~2.25V***
Quiescent Current: 3.36mA****
Note1 - I haven't tested this IRL.
Note2 - The MOSFET is just a TL431 voltage reference and is not a part of the regulator circuit. I know that a TL431 isn't quite discrete, but I'm unable to make a stable discrete voltage reference. Any ideas?
*Vin = 10V, 100mA<=Io<=500mA
**Io = 500mA, 10V<=Vin<=30V
***Io = 500mA
****Vin = 10V, Io = 0A
