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LM2596产生-5V电路仿真失败

Other Parts Discussed in Thread: LM2596, TPS62150

    大家好,我打算用LM2596产生-5V的输出,可是我照着datasheet上的原理,在Tian TI上仿真。

    我画的仿真电路:

    

    Datasheet上原理图:

    

    在我“分析-设置分析参数-带初始条件的工作点”选为否时,直流仿真失败,错误原因是未找到工作点,选为是时,输出电压为900多uV,我想请问一下我这是哪里操作错误了吗?

    或者说,产生负电压不能这样做吗?