Depending on the input and output voltage, it is possible to get above 95% efficiency from all the regulators in the BD9x series. Highest efficiency is achieved when the voltage regulator is operating between 75%-80% of its maximum load. Due to this, it is important for the designer to pick the right part according to the application. The efficiency graph shown here is for the BD9A101MUV-LB switching regulator. This is a 1A output part. This efficiency graph is representative of the BD9x series regulators which have similar efficiency curves for their respective load capabilities.