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AM3517 power management

Edwin Ng
Intellectual 980 points
Other Parts Discussed in Thread: AM3517, TPS65023

Hi,

My product is using AM3517 CPU, for the reference design TI is provide several PMU match for AM3517 but my product is not a portable product, which is 5V DC adapter power source, so it didn't requirement any power management, and for cost issue the PMU TPS65023 will be replaced by several LDO, what I need to consider? 

 

B.R.

Edwin Ng

  • 0
    Genius 3685 points

    Hi Edwin,

    I think the main issues you need to consider are:

    1. Right sequencing of the different LDOs start time compared to each other
    2. The amount of current to be delivered from each LDO

    This being said: Unless aiming for a mid/high volume product (and even in this case) I doubt that you can save much from using discrete LDOs with timing control compared to using i.e. the TPS65023. Especially not taking the potential risk and new needed verification and design hours into account. This of cause all very much depends on the final volume of your application and your required time for time-to-market...

    Best regards - Good luck
      Søren

  • 0 in reply to Soren Steen Christensen
    Intellectual 310 points


    Logic PD release their new Wattson software for the AM3517 EVM today which will help you see actual power transitions for all power rails to the CPU and SOM design.  There is an adapter required to connect to the PC available from this website: http://createnewstuff.webs.com/breakoutboardwattson.htm

    The Logic PD software is available from here: http://www.logicpd.com/wattson