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TPS54618: Webench仿真电路轻载启动总失败原因是什么?

Part Number: TPS54618

Webench仿真时当频率设置为2MHz,Vin=6V,Vout=1.8V,最大输出负载为0.1A,输出负载电阻设置为360欧姆,wenbench自动生成的外围配置,输出起不来。

是Webench仿真工具外围配置有问题,还是芯片本来就这样?