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TPS62132: Confirmation and clarification of output accuracy

legacy_love
Prodigy 40 points
Part Number: TPS62132

Tool/software:

Hello!

In the TPS6213x datasheet (Sec.7.5), "initial output voltage accuracy" is indicated as 800mV; however there is no actual definition of this characterictic.

In case of TPS62132RGTR (3.3V output version), does this mean that its output voltage may vary between 2.5V (=3.3-0.8) and 4.1V (=3.3+0.8),

i.e. variation from the center target voltage value?

If yes, this range seems to be relatively large if compared to a typical 3.3V system, with a typical range of +/-10%. Or possibly...  is this 800uV, instead of 800mV?

Please clarify the definition of this value, together with its quantitative confirmation.

Thank you!

  • +1
    TI__Mastermind 21131 points

    Hi,

    You can regard initial output voltage accuracy which indicated as 800mV as internal reference voltage accuracy.

    Thanks,

    Colin

  • 0 in reply to Colin Chen
    Prodigy 40 points

    Thank you for your information.

    Just after this discussion I was reported that this output voltage is actually destroying the load ICs,

    as they are not tolerant against such high voltage i.e. 4.1V, which is normally out of range for standard 3.3V components....

    Is there any "emergency" method to reduce/stabilize the output voltage?

    e.g.1 increase its load current (10mA at the moment) or

    e.g.2 increase output capacitor/inductor?

    e.g.3 or any other possible ideas?

  • 0 in reply to Colin Chen
    Prodigy 40 points

    Thank you for your information.

    Just after this discussion I was reported that this output voltage is actually destroying the load ICs,

    as they are not tolerant against such high voltage i.e. 4.1V, which is normally out of range for standard 3.3V components....

    Is there any "emergency" method to reduce/stabilize the output voltage?

    e.g.1 increase its load current (10mA at the moment) or

    e.g.2 increase output capacitor/inductor?

    e.g.3 or any other possible ideas?

  • 0 in reply to Colin Chen
    Prodigy 40 points

    Thank you for your information.

    Just after this discussion I was reported that this output voltage is actually destroying the load ICs,

    as they are not tolerant against such high voltage i.e. 4.1V, which is normally out of range for standard 3.3V components....

    Is there any "emergency" method to reduce/stabilize the output voltage?

    e.g.1 increase its load current (10mA at the moment) or

    e.g.2 increase output capacitor/inductor?

    e.g.3 or any other possible ideas?

  • 0 in reply to legacy_love
    TI__Mastermind 21131 points

    It is the internal reference voltage, not the initial voltage.

    Thanks,

    Colin

  • 0 in reply to Colin Chen
    Prodigy 40 points

    I can imagine that you're very talented engineer and capable of understanding all the technical issues in the short time, but I'm not so familiar with your products. Please clarify:

    1. Clear definition of "initial voltage"

    2. Physical role of "reference voltage"

    3. What voltage range we can expect as 3.3V power supply