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TMS570LC4357: TMS570LC4357 Current Consumpion extimation

Dario Moscardi
Prodigy 115 points

Part Number: TMS570LC4357
Other Parts Discussed in Thread: TPS62160-Q1

Good Morning,

I am designing a new board with TMS570LC4357-Q1 and I am guessing about the current consumption. In the datasheet I see a 510mA typ and a maximum of 990mA.

Where is all this difference coming from? Is it a transient or it refers to full operating capabilities? Or is it the worst case in temperature and voltage supply?

The typical 510mA is in full operating at standard temperature or in a different operating condition?

All theese questions because I would like to supply the MCU with two 1-A Buck controller TPS62160-Q1 (1V2 and 3V3) and I am not sure if it is enough.

Hope you can clarify my doubt.

Thanks in advance,

Dario Moscardi

  • 0
    TI__Guru**** 199286 points

    Hello Dario,

    990mA is the maximum for the core (1.2V) supply. That covers the case with the CPU running at 300MHz, the core voltage is at 1.32V and the junction temperature is 150C. There is a footnote showing how you can derate that value when at different conditions. Running LBIST/PBIST consumes more current which is up to 1375mA. The typical value is measured at room temperature (25C).

    1-A buck for 1.2V+3.3V is not enough.