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TPS43330A-Q1: Differences between TPS43330-Q1 & TPS43330A-Q1

Part Number: TPS43330A-Q1
Other Parts Discussed in Thread: TPS43330-Q1, , TPS54618-Q1, TPS54618

Hi Team,

What is the primary difference between the "A" & "non-A" versions of this device? Understood that the non-A is considered NRND today, but my customer is currently using it in an older application, and is looking to migrate to the new version.

Regards,

Andy

  • Hi Andy,

      I can't find the document with their difference listed; but from TPS43330-Q1 search result in TI website, it shows result below. 

    Pin-for-pin with same functionality to the compared device.

    TPS43330A-Q1

    Automotive 2V to 40V Low Iq Single Boost & Dual Synchronous Buck Controller
    The TPS43330A-Q1 is a replacement for the TPS43330-Q1.
    Thanks!
    Phil
  • Hi Phil,

    If you could keep digging for whatever document list's the associated differences I'd much appreciate it. 

    I know for some other devices we've added a Polyimide (PI) layer to the process flow for improved quality & reliability, and with that introduction we created a new device with a letter denotation - the TPS54618-Q1 vs. TPS54618C-Q1 is a prime example. However, I'm not certain if that was what changed on this device.

    Regards,

    Andy

  • Hi Andy,

       Sure; I'll do and let you know if I get any result.

    Thanks!

    Phil

  • Hi Andy,

      Please see the answer below from a previous designer of the device:

      In device TPS43330 (non-A version): When device in LPM and waking up EXTSUP gets shorted to VREG and that may cause a restart of the device (including running buck regulators):
        High-IQ in Low-Power Mode under certain load-change condition (when changing load from 700mA to 170mA, and then removing the load results in Continuous-Mode operation instead of low-power mode.)
    The above silicon bugs were fixed in TPS43330A.

    Thanks!

    Phil