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TPS74401: One question about the datasheet

Part Number: TPS74401


The datasheet writes "1% Accuracy Over Line, Load, and Temperature ", but I don't know what's the accurate meaning. Does it mean this chip's output voltage error related to the set output is less than 1% under all condition? Considered about that the max load regulation is about 0.9%, I don't think that's right.

Or does it mean the line regulation, the load regulation and the output error related to temp are under 1% respectively?

Thank you for your help.