ADP1607 PWM MODE EFFICIENCY

Hi,

I am looking at the ADP1607 datasheet and I can't find an efficiency curve for the ADP1607ACPZN001-R7  which is the permanent PWM mode IC (not auto mode PFM,PWM).

Basically I have a problem with the 2% deviation in PFN mode and I would like to work with PWM mode at the current of 2-4mA.

Any advise? 

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