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TPS54140A: Pull down in Enable pin Query

Part Number: TPS54140A
I'm using TPS54140A for 3.3V regulation from 5V input. I have used a 10K pull down to the EN pin of this regulator to keep it off during power ON.
through software control, I will make Enable pin high (1.8V) to turn ON the regulator when needed. 
But by during power ON itself I can see 2.6V output at the regulator output. my doubt is that whether this 10K pull down is not enough. Could you clarify on this.

Please refer the below snap for schematics reference.