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TPS62205: TPS62205 PFM Mode

Part Number: TPS62205

Hi Team,

I get a question about TPS62205's PFM mode. 

Datasheet page 9 says [Two conditions allow the converter to enter the power save mode operation]. one is DCM and another is peak detection.

Does both conditions(DCM & peak) need to be satisfied then controller goes to PFM? or either DCM or peak can allow it go to PFM? 

thanks a lot.

Best regards,