Figure 4

The regulator circuit structure, simulation results and the test results.
(a) The regulator circuit. (b) The DC Sweep results of the current through the transistor Q1 and Q2. (c) The Time Domain results of the current through the transistor Q1 and Q2. (d) The Time Domain result of the total output current. (e) The actual output voltage of the buck regulator. (f) The actual output current of the regulator.