Figure 2-1 through Figure 2-3 show the PMP23194 efficiency graphs for 3.3 V, 5 V and 8 V, respectively.

For the main 3.3 V with 22-W maximum output power, efficiency peaks at 95% at 10 V_IN, just over 93% for 14 V_IN, and about 91.5% for 18 V_IN. For the lowest power 5 V with 0.6-W maximum output power, efficiency is in the 70%–80% range at 14 V_IN and loading above 50% maximum load. For the 8 V with 4.8-W maximum output power, efficiency is in the 80%–86% range for loads at and above 2 W at all three input voltages tested.

Figure 2-4 through Figure 2-6 show the loss graphs for 3.3 V, 5 V and 8 V, respectively. These loss graphs for all three outputs are shown from no load thru maximum load at the same input voltages. Losses in input EMI filters are not included here.