An envelope tracking (ET) integrated circuit (ETIC) operable across wide modulation bandwidth is disclosed. The ETIC includes at least two auxiliary voltage outputs coupled to a high-bandwidth power amplifier circuit that has a lower equivalent capacitance, and thus a higher impedance resonance frequency. The ETIC also includes a pair of ET voltage circuits configured to generate a pair of ET voltages, respectively. To help mitigate potential distortion in the ET voltages, a control circuit is configured to couple the ET voltage circuits exclusively to the auxiliary voltage outputs when the ETIC needs to operate with a high modulation bandwidth (e.g., 200 MHz). Given the higher impedance resonance frequency of the high-bandwidth power amplifier circuit, it is possible to increase separation between an energy spectrum of a voltage disturbance and an energy spectrum of the high modulation bandwidth, thus helping to reduce the potential distortion in the ET voltages.

An envelope tracking (ET) integrated circuit (ETIC) operable across wide modulation bandwidth is disclosed. The ETIC includes at least two auxiliary voltage outputs coupled to a high-bandwidth power amplifier circuit that has a lower equivalent capacitance, and thus a higher impedance resonance frequency. The ETIC also includes a pair of ET voltage circuits configured to generate a pair of ET voltages, respectively. To help mitigate potential distortion in the ET voltages, a control circuit is configured to couple the ET voltage circuits exclusively to the auxiliary voltage outputs when the ETIC needs to operate with a high modulation bandwidth (e.g., 200 MHz). Given the higher impedance resonance frequency of the high-bandwidth power amplifier circuit, it is possible to increase separation between an energy spectrum of a voltage disturbance and an energy spectrum of the high modulation bandwidth, thus helping to reduce the potential distortion in the ET voltages.