Figure 2-1 and Figure 2-2 show the efficiency for the TPS563900EVM-574 in CCM at an ambient temperature of 25°C.

Figure 2-1 TPS563900EVM-574 V_OUT1 CCM Efficiency

Figure 2-2 TPS563900EVM-574 V_OUT2 CCM Efficiency

Figure 2-3 and Figure 2-4 show the efficiency for the TPS563900EVM-574 in CCM using a semi-log scale to more easily show efficiency at lower output currents. The ambient temperature is 25°C.

Figure 2-3 TPS563900EVM-574 V_OUT1 CCM Low Current Efficiency

Figure 2-4 TPS563900EVM-574 V_OUT2 CCM Low Current Efficiency

Figure 2-5 and Figure 2-6 show the efficiency for the TPS563900EVM-574 in SKIP mode at an ambient temperature of 25°C.

Figure 2-5 TPS563900EVM-574 V_OUT1 SKIP Mode Efficiency

Figure 2-6 TPS563900EVM-574 V_OUT2 SKIP Mode Efficiency

Figure 2-7 and Figure 2-8 show the efficiency for the TPS563900EVM-574 in SKIP mode using a semi-log scale to more easily show efficiency at lower output currents. The ambient temperature is 25°C.

Figure 2-7 TPS563900EVM-574 V_OUT1 SKIP Mode Low Current Efficiency

Figure 2-8 TPS563900EVM-574 V_OUT2 SKIP Mode Low Current Efficiency

The efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET.