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TPS54331: WEBENCH 负载0.5A测试输出波动大

Part Number: TPS54331

输入:4.8~5.2

输出:3.3V @0.5A

仿真时电源3.62V~2.43 V范围输出,动态响应太差了,0.5A的电流就掉了1V左右,

这是什么原因呢?实际按照这个参数设计,输出也这么差吗