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LM2660: LM2660一脚在接入V+的时候,无法切换至80Khz,且输出电压只有-3V

Part Number: LM2660

c9418dc9a0832ca7b7da821709794f89.png461e0878-ec7e-4b31-b8f5-fa079f5be666.png232b8e3638fa965536d7804ff59c7a7e.png示波器二个图都是1脚有接VCC,一个是好的,一个是不行的,目前手上有二种背文,同一种的IC动作都一样,一种有拉高频率,另一种就没有。