4
Linear Regulator in Closed Loop Operation
This is lab 4 of 12 in the course
by Dr. Nicola Femia | University of Salerno, and Texas Instruments
The goal of this lab is to analyze the closed loop operation of a linear regulator. We investigate the impact of the loop gain on the ability to reject noise and changes in the output voltage, which is the most important feature of linear regulators. First, we will review the principle of operation and the simplified model of a closed loop linear regulator. Next, we will use the simplified model to predict its response to AC perturbations and its accuracy to the reference signal. Then, we will simulate the linear regulator in DC and AC operation to evaluate the impact of the MOSFET and error amplifier parameters. Finally, we will perform experimental tests with a real linear regulator, and will compare the results of simulations and measurements to verify their consistency.