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TPS2660: TPS26600 About the SHDN pin

Part Number: TPS2660

Dear support member,

My customer used TPS26600.

I have a question.

Q1
When controlling this signal (/ SHDN) by the description in the data sheet,
It is described to make it like pulling (touching) against GND.

When connected to GND "Does not reverse polarity protection function become invalid?

Is it correct to connect to "RTN pin"?

Best regard.
Bob Lee.