This slide shows the efficiency curves of the ISL8203MEVAL2Z evaluation board with input voltages at either 3.3V or 5V. The curves are from a single output of 3A. Efficiency is defined as the ratio of the output power to the input power. The graphs show the efficiencies for each combination of output voltage and load current. For example if the customer’s requirement is an input voltage of 3.3V and an output voltage of 1.5V at 2.0A, the expected efficiency will be 84%. Similarly, with an input of +5V, if a customer’s output voltage requirement is 3.3V at 2.5A, the expected efficiency will be 91%.