• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 63 subscribers
  • Views 572 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS562200: TPS562200 output ripple specification

JeffYC Yang
Expert 1290 points
Part Number: TPS562200

Hi Sir,

I have check the TPS562200 datasheet but there have no output ripple specification, Figure 27,28,29 seems it based on EVM condition VIN = 12 V and an output voltage of 1.05 V, for other voltage level have any criteria can judgement ripple is in specification? If Vin =12V, Vout = 3.3V?

Thanks!

Jeff

  • 0
    TI__Mastermind 18510 points
    Hi Jeff,

    562200 is a D-CAP2 mode part, supports all ceramic output cap(lower ESR), so the Vout ripple is always smaller. of course, the ripple also depends on the LC filter design(TI provide recommend value table, page16 in DS).
    For 3.3Vout, I think it can meet most application system spec. either, except yours is very special.

    BR,
    Yuchang
  • 0 in reply to Yuchang Zhang
    Expert 1290 points
    Hi Yuchang,

    I got it. I will try to follow P16 design for Vout=3.3V to get better Vout ripple.
    But for 3.3Vout, could you please comment vout ripple should be lower than maybe 20mV? 50mV?80mV? is normally?

    Thanks!
    Jeff
  • 0 in reply to JeffYC Yang
    TI__Mastermind 18510 points
    Hi Jeff,

    Draft estimate, if same LC with 1.05V EVM, 3.3Vout inductor choke ripple current will be about double as 1.05V, so the ripple should be also double.
    and if 3.3V L value double to 4.7uh or 3.3uh + 3*22uf, the ripple maybe almost same as 1.05V.
    I think also you can evaluate with TI Webench tool.

    BR,
    yuchang