The achievements of PowerXR as just a Power Management IC by itself, are one, there are four switching controllers in one small QFN40. Analog controllers invariably have cross talk between the different outputs, because leading edges and trailing edges of the PWM output will overlap each other and create jitter. PowerXR was specifically tested to see what that performance was, and there is minimal to no jitter between channels. The output accuracy is plus or minus 20mV over temperature with low component count.