DP83848I / Ceramic capcitor for PFBOUT

Ryuji

Guru 20090 points

Hello,

In the datasheet page 14, there is PFBOUT description as "output Parallel caps, 10μ F (Tantalum preferred) and 0.1μF, should be placed close to the PFBOUT. Connect this pin to PFBIN1 (pin 18) and PFBIN2 (pin 37)".

Can we use ceramic capacitor for this 10uF output cap ?
Since I believe that Tantalum caps need for stability, ceramic capacitor is accepted if we added series resistor.
If yes, please let me know the resistor value for keeping stability with ceramic cap.

Best Regards,

Ryuji Asaka

over 11 years ago

0 Patrick OFarrell over 11 years ago

TI__Mastermind 31600 points

Please see the response to a similar post at:

http://e2e.ti.com/support/interface/ethernet/f/903/p/202247/718336.aspx#718336

As noted in that post, "the use of the Tantalum cap would constitute best practice and would provide more stability for the regulator, but many designs have used ceramic caps instead and have not seen any issues."

No additional series resistor should be necessary.

Patrick

0 Ryuji over 11 years ago in reply to Patrick OFarrell

Guru 20090 points

Hello Patrick san,

Thank you.

I understood.

Best Regards,

Ryuji Asaka

Interface

Interface forum

DP83848I / Ceramic capcitor for PFBOUT