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TPS61030 - Graph of Efficiency

Dice-K
Mastermind 6330 points
Other Parts Discussed in Thread: TPS61030, TPS61096, TPS61099, TPS61220

Hello,
I have a question about TPS61030 of WEBENCH.
I attach a result of WEBENCH.

WebenchReportsServlet_4.pdf

Is graph of efficiency in the power save mode?

Regards,
Dice-K

  • 0
    TI__Mastermind 41310 points

    Dice-K,

    Are you actually looking at an output current of 10uA for your design?

    Power save is enabled because the SYNC pin is tied to GND, but I am not sure how much help it will provide at such a low current. The power save shuts off the switching, but at such a low current, it may take a very long time for the voltage to drop low enough before the switching starts again. The output current is lower than the quiescent current, so I would guess a VERY low efficiency.

  • 0 in reply to Britt Brooks - Online Design Tools
    Mastermind 6330 points

    Hello Britt,
    Thank you for your reply.

    I use TPS61030 with light load (less than 100uA).
    Therefore I want a graph of the efficiency with these load.

    SYNC pin is tied to GND in the WEBENCH circuit.

    Is this graph of efficiency in the power save mode?


    Best regards,
    Dice-K

  • 0 in reply to Dice-K
    TI__Mastermind 41310 points

    Dice-K,

    As I said before, yes, the device is in power save mode. My concern is that this device (the TPS61030) is recommended for much higher current operation than 100uA. If your application is only operating at or near that value, there are much more efficient parts to use (like the TPS61096 or TPS61099 for example).

    The TPS61220 is enabled in WEBENCH® and would have better efficiency at the lower current levels.

    When your currents get below the Iq of the TPS61030, the power save feature will not help the efficiency.