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Original question:

TPS22959: TPS22959 alternatives

TPS22959: Power derating and part alternatives

Daniel De Sousa
Intellectual 580 points
Part Number: TPS22959
Other Parts Discussed in Thread: TPS22975, TPS22969, TPS22962, , TPS22961

Hi there, we have 2 questions regarding TI load switches

Our application:

-Robotics
-VIN = 3.3V
- IOUT = 5.5A peak, 4A DC

1. What does TI recommend for current derating within your load switch line? Both DC and peak current derating.

- Would it be suitable to use a 6A switch (TPS22975) for an application with IOUT = 5.5A peak, 4A DC?

2. Are the following parts all compatible from a layout and schematic perspective?

TPS22969
TPS22962
TPS22959
TPS22961

Thank you

  • 0
    TI__Genius 13260 points

    Hello Daniel,

    The current derating is based on thermal characteristics. You will need to calculate self heating at ambient temperature to make sure the junction temperature stays below 125C. In the TPS22975 datasheet in section 12.3 it explains how you can calculate the max power dissipation.

    The four devices you've mentioned are P2P.

    Regards,

    Kalin Burnside