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DCDC 中COT和DCAP1 输出应用高ESR?

Other Parts Discussed in Thread: TPS51116

DCDC中COT和DCAP1代拓扑结构稳定输出电压,从理论上来说是需要比较大的输出ESR,但是目前很多芯片是采用这两种控制拓扑,推荐的输出电容又是低ESR的瓷介容,这样不是很矛盾吗(芯片没有采用RCC结构来采集电感电流纹波)?请问大家这是为什么?