• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 327 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS560430-Q1: Current consumption with light loads

Sumangala Shivanna
Prodigy 190 points
Part Number: TPS560430-Q1

Hi,

I am using TPS560430YFQDBVRQ1 in one of my designs with 9V as its input and 5V as output. The total current consumption of the board without any code running is 8 mA. I bypassed TPS560430YFQDBVRQ1 regulator and directly provided 5V to my load through bench power supply and the current consumed by board was 3 mA. It seems like the regulator itself is consuming 5 mA. Is this because the regulator operates in FPWM? Please help me out here.

Thank you!

  • 0
    TI__Genius 10715 points

    Hello Sumangala,

    It is expected for the device to consume more quiescent current when operating in FPWM mode because the regulator switches at constant frequency rather than reducing frequency which would reduce losses due to switching.

    The TPS560430YQDBVRQ1 operates in PFM mode which does reduce the switching frequency at light loads and consumes 80uA of quiescent current typically. This is at the cost of increased output voltage ripple.

    If your load can handle increased output voltage ripple, consider using the PFM version as this will offer increased efficiency at light loads.

    Regards,

    Harrison Overturf