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TPS54225 / Internal 5V regulator

S.Satoshi
Guru 21675 points
Other Parts Discussed in Thread: TPS54225

Hi,

Please let me ask about internal 5V regulator of TPS54225.

  1. Is VCC input used only for internal 5V regulator? Or is it used for other internal circuit directly?
  2. Can you provide PSRR of this internal 5V regulator? Or can you provide general target PSRR spec of internal regulator for such DC/DC converter if it's difficult to share the spec for TPS54225?

Your comment will be appreciated.

Best Regards,

Sonoki / Japan Disty

  • 0
    TI__Genius 15135 points
    hi, Satoshi

    1. Yes, the VCC is only used for internal LV circuit directly.
    2. Generally, the VCC pin will connect a big capacitor(1uF) to stabilize VCC voltage in application, so we don't care about the PSRR of 5V regulator.

    thanks.

    zhao