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[FAQ] TPS65218D0: What difference between this new version and the old version?

Part Number: TPS65218D0
Other Parts Discussed in Thread: TPS65218

Hi,

I noted TPS65218 has been NRNDed. The new version is TPS65218D0. I am wondered what is the difference of this new version? Is the technical issue (DCDC4 cannot start up) with the old version has been fixed in this new version?

Thank you,

John

  • John,

    Simply put, the TPS65218D0 is a device that is functionally equivalent to the TPS65218 (-B1 version) that meets the majority of the original target specs of the device. They are pin-2-pin compatible and functionally equivalent. The TPS65218D0 is replacing the -B1 version, and they are a not complementary devices.

    Yes, DCDC4 start-up is one of the issues resolved in the -D0 version.

    Notifications were sent out to all TPS65218 customers in December 2017, highlighting the spec changes made to the -B1 datasheet. The -D0 product was also released in December 2017, but it takes extra time for the NRND process to complete.
  • Hi Brian,

    This is first time my customer use TPS65218 so the did not receive any notification. Can you please send me that notifications to me? They want to know what changes made from -B1 version to D0 version.

    Thank you,
    John
  • John,

    If your customer is new to using this PMIC then it should be quite simple to explain the the TPS65218D0 is an improvement over the original device. This is a new design, therefore the TPS65218 is not recommended (NRND).

    The Revision History in the TPS65218 datasheet captures all of the spec changes that were made to ensure the datasheet accurately represented device performance. The major issues that presented a system-level problem were fixed in -D0 silicon. The non-critical issues that had no impact on system performance were not fixed and the -B1 datasheet will still match the -D0 datasheet.
  • Below is a short list I have compiled of changes you can easily identify where the TPS65218D0 performance is improved (the TPS65218 -B1 datasheet has a revision that has been modified in the new datasheet):

    • IN_BIAS VUVLO hysteresis - fix = device will not turn on until VIN_BIAS > 2.7V + VUVLO,hys (rising) and will shut off when VIN_BIAS < 2.7V (falling)
    • VOV and VPG tolerance when STRICT == 1b - fix = tolerance is accurate to within +/0.5% of the typical value
    • DCDC4 startup - fix = no restrictions on start-up based on DCDC4 input voltage or temperature
    • DCDC4 DC accuracy and voltage ripple in PFM - fix = accuracy is improved across all output current ranges, and spec is added for accuracy with low input voltage
    • DCDC5 DC accuracy - fix = accuracy is greatly improved across temp and at light loads
    • DCDC6 DC accuracy - fix = accuracy is greatly improved across temp and at light loads

  • Thank you Brian,

    Do you have the formal PCN document? Could you please send it to me if you have? My customer asking me for it.

    Regards,
    John
  • John,

    PCN's are unique, personalized documents created for each customer that has purchased the device.

    The Revision History in the TPS65218 (-B1 silicon) datasheet is a public version of the spec change-related info included in the PCN.