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Power consumption in Hercules MCUs

F-14 Tomcat
Prodigy 40 points
Other Parts Discussed in Thread: TMS570LS20216

Hello

I need a safety MCU for my project, but RM4x and TMS570 series consume about 150 .. 700 mA.

I need a microcontroller which consumes less than 50mA (average).

Do RM4x or TMS570 support sleep mode? Does TI have any microcontroller (not only safet MCU) with CAN 2.0 and power consumption less than 50mA?

thanks

  • 0
    TI__Guru 68920 points
    Hi Tomcat,

    I'll do some thinking on this and see what we can recommend. The RM4x and TMS570 do support low power modes, and one of my colleagues showed me the other day actually getting below 1mA in one of these modes. But that was room temp on a typical part. The number in the datasheet accounts for the entire process variation as well as temperature and voltage ranges.

    We probably need to get into some detials about what you mean by average. Especially when it comes to temperature. Do you need the average power consumption at high temperature to be < 50mA for example? And how many parts are you considering? (100's, 1000's or even more).

    Also what type of performance do you need out of the MCU? Would an RM42 or TMS470M product meet your needs? The smaller the MCU the less the leakage and the better we'll be able to keep your high temp power consumption down.
  • 0 in reply to Anthony F. Seely
    TI__Guru 68920 points
    Tomcat,

    The TMS570LS20216 might be an option. It's a few process nodes behind the latest TMS570/RM parts, but otherwise close in function and software. It has a DOZE spec of 35mA on the core at the max core VCC, across temp.