Linear Technology
DC1585A - LT3083EQ Demo Board | Single Resistor Prog Low Dropout Linear Regulator, 1.7V ≤ VIN ≤ 23V, Vout = 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V @ 3A
Manual
LT3083 - Product Info
LTspice - Software