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LM43601: Negative output issue

Part Number: LM43601

Hi TI,

I have designed -5V Inverter design based on Webench simulation. But It's not working(No output).

This issue is solved when I removed the capacitor is from VIN to VOUT (Cio) or reduced to under 0.1uF 

Load current is under 100mA.

Please let me know about the reason.

The voltage rating of Cio is over 25V.