SLVU380A September 2010 – October 2021 TPS54320
2.2 Efficiency
The efficiency of this EVM peaks at a load current of about 0.9 A and then decreases as the load current increases towards full load. Figure 2-1 shows the efficiency for the TPS54320 at an ambient temperature of 25°C.
Figure 2-1 TPS54320 EfficiencyFigure 2-2 shows the efficiency for the TPS54320 at lower output currents below 0.20 A at an ambient temperature of 25°C.
Figure 2-2 TPS54320 Low Current EfficiencyThe efficiency may be lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the internal MOSFET.