System and method for supplying power to a power amplifier

A method of providing power to a radio frequency power amplifier, the method comprising:

• converting a first input voltage to a first output voltage;
• providing the first output voltage to a first stage of the radio frequency power amplifier and to a second stage of the radio frequency power amplifier in a first mode of operation;
• converting a second input voltage to a second output voltage in a second mode of operation;
• and
• providing, in the second mode of operation, the first output voltage to the first stage of the radio frequency power amplifier and at least a portion of the second output voltage to the second stage of the radio frequency power amplifier.

A method of providing power to a power amplifier, the method comprising:

• detecting an amplitude of an input signal;
• comparing the amplitude to a signal threshold;
• selectively providing at least one of a first converted voltage and a second converted voltage to the power amplifier in response to the amplitude being lower than the signal threshold;
• and
• combining the second converted voltage and a third converted voltage to provide a combined voltage to the power amplifier in response to the amplitude being higher than the signal threshold.