TPS25947: TPS259470ARPWR Power mux

 I want to add more accurate schematic. Does it work as 4.5V priority , ? And at least does that device valid? 

I want to use less components as possible in case of space constraints. 

Hi! 

The schematic given in the datasheet is similar to what you have shared above but there is some error in your schematic. OVLO is connected in wrong way.

If you wish to reduce the number of components, you can use following.

• If blanking timer is not required, leave itimer floating for fastest fault response.
• If not using PG signal, leave the PG pin floating.

Best Regards,
Arush

Why you tell that my schematic is wrong. I have connected exactly as it is in the datasheet. UVLO controls OVLO .  

In the datasheet it is written. "TPS259474x devices as shown in Figure 9-15 below. Here, the EN/UVLO signal of the primary path device is used to control the OVLO of the auxiliary path device. This ensures that auxiliary path device is turned on only when the primary supply falls below a user-defined undervoltage (UVLO) threshold. In this configuration, supply overvoltage protection is not available on both channels. The PG pins of the devices can be used as a digital indication to identify which of the 2 supplies is active and delivering power to the load."