1.7 Voltage-Mode DCM Closed Loop

As mentioned before, buck converters operating in the DCM are not desirable. But, for academic completeness, the closed-loop formulation for this operation mode is also given. We first consolidate (1.12) and (1.15):

(1.33)

We then replace the power stage of Figure 1.10 with one for the DCM. This step leads to Figure 1.11 for the DCM.

Figure 1.11: Buck converter DCM in a closed loop

By defining a new implicit function based on (1.33), we certainly can perform the same sensitivity study as outlined in the previous section. It is not repeated here.