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TPS63000: Power-save mode

ArTzy
Genius 13999 points
Part Number: TPS63000

Hi Experts,

Good day! This queries is about buck-boost converter, TPS63000.

Can you clarify us about the PS/SYNC pin? Is this for more of a stand by use? Or is it for using the part at lower currents?

Client has to use the TPS63000 part for 4.4V and under 100mA application.

Does putting the such pin to LOW would make the part more efficient at these low 50mA current uses? The D/S sort of seems to indicate that, but then it describes the part like shutting down when under 300mA and stuff.

Thank you for your guidance.

Regards,
Archie A.

  • 0
    TI__Genius 13999 points

    Need your confirmation on this.

    Thanks!

    Regards,
    Archie A.

  • 0 in reply to ArTzy
    TI__Mastermind 34201 points

    Hi Archie,

    To enable power-save mode, PS/SYNC must be set low. Power-save mode is used to improve efficiency at light load. If power-save mode is enabled, the converter stops operating (stop switching) if the average inductor current gets lower than about 300 mA and the output voltage is at or above its nominal value. If the output voltage decreases below its nominal value, the device ramps up the output voltage again by starting operation using a programmed average inductor current higher than required by the current load condition. Operation can last for one or several pulses. The converter again stops operating once the conditions for stopping operation are met again.

    If you want to achieve higher efficiency at light load condition, you can select power-save mode, such as 10mA load current. The device doesn't shutdown in power-save mode.

  • 0 in reply to Zack Liu
    TI__Genius 13999 points

    Hi Zack,

    Thanks for your response.

    Yes, as what the datasheet explains it from page 9. So does it mean, putting the PS pin to low all the time will activate such feature? Do you mean 100mA, not 10mA load current?

    Thank you.

    Regards,
    Archie A.

  • 0 in reply to ArTzy
    TI__Mastermind 34201 points

    Hi Archine,

    Yes, putting the PS pin to low will enable power save mode. In short, in power save mode, the device switches for several cycles, Vout increases, the device sees Vout is higher then it stops switching (doesn't mean shutdown) until Vout is lower than setting value. Then it switches again. With such kind of operating scheme, the efficiency is improved.

    The 10mA is just an example.