From the values listed in the table above, it is apparent that one common RF match may (potentially) be used to obtain different outputpower levels, simply by changing the VDD voltage supplied to the TX output pins. Although not shown in the table, it is often possible toobtain different output power levels for the same VDD supply voltage, by changing the differential load impedance presented to the PA.For example, the table above shows that it is possible to obtain +14 dBm from the chip for VDD = 1.8 V and a differential load impedanceof 100 to 125 Ω. It is also possible to obtain +14 dBm from the chip for VDD = 3.3 V and a differential load impedance of ~330 Ω.The PA current consumption from the 3.3 V supply will be less than the PA current consumption from the 1.8 V supply. However, theEFR32 family of chips provide for an on-chip DCDC Converter, and it is assumed that the 1.8 V (or 1.7 V) PA supply voltage will beobtained from the output of the DC-DC Converter, thus gaining the current efficiency of the converter (i.e., converting VBATT = 3.3 V toVDD = 1.8 V). In most cases, overall chip current consumption is minimized by using the DC-DC Converter as the voltage source for thePA for all applications with TX output power ≤+14 dBm. Moreover, with the DCDC the output power level is stable and immune againstVDD variations.