This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS61099: switch between a battery and and external power

Part Number: TPS61099
I would like to put the outputs (3.5V) of two regulators in parallel. 
A TPS61099 with a 3V battery connected to Vin and another buck regulator with a serial diode.
 If the buck regulator is powered, it cuts the Enable of the TPS61099.
 How then behaves the TPS61099 with Vout always at 3.5V