TPS25947: Cout selection

Shota Mago

Expert 7710 points

Part Number: TPS25947

Hi team,

My customer considers to use TPS25947 and has some questions.

How should we choose value of Cout?
I think total Cout would depend on input capacitance of downstream DCDC, but I'd like to know how to select Cout which is close to OUT pin of TPS25947.
The customer doesn't use PG/PGTH or AUXOFF/FLT pins. How should we terminate these pins if these are unused?
Is it okay to leave floating?

Best regards,

Shota Mago

over 4 years ago

+1 Praveen GD over 4 years ago

TI__Guru 57737 points

Hi Shota,

1. The Output capacitance of TPS25947 is purely based on system level requirement. For decoupling purpose, you can consider using a minimum of 0.1 uF - 1 uF at the output of TPS25947.

2. Yes, you can leave the PG/PGTH or AUXOFF/FLT pins floating if unused.

0 Shota Mago over 4 years ago in reply to Praveen GD

TI__Expert 7710 points

Hi Praveen,

Noted.

Thanks for your very quick response!

Best regards,

Shota Mago

Power management

Power management forum

TPS25947: Cout selection