I'd like to build an audio amplifier using the TPA3004D2 IC (datasheet).
My supply input is 24 VDC and I'm currently using a switching regulator (datasheet) with a switching frequency of 500 kHz to get 17 V and was wondering if an additional LDO for smoothing the supply would provide any noticeable benefit or if I can just connect the 17 V to the amplifier IC.
My logic is that any switching noise is too high in frequency to be audible so an LDO would likely not have much of an effect, is this correct?
Also, Figure 18 in the TPA3004D2 shows -63 dB supply ripple rejection from 10 Hz to 1 kHz so is this already working like an LDO?