One big benefit of operating in an out-of-phase system is input current ripple is minimized. If Renesas were to compare three converters operating in-phase, the peak input current would be 24A or 12A_RMS at 50% duty cycle. On the other hand, an out-of-phase system would have an 8A peak or 4.3A at 50% duty cycle. Thus, significantly reducing the input capacitor requirements and EMI spectrum.