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TI Home » TI E2E Community » Support Forums » Power Management » SIMPLE SWITCHER® » SIMPLE SWITCHER® - Forum » LMZ10501 Current Sharing Questions
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LMZ10501 Current Sharing Questions

LMZ10501 Current Sharing Questions

This question is answered
Patrick C
Posted by Patrick C
on Feb 13 2012 10:57 AM
Expert5865 points

Hello All,

I am looking for a few things for the LMZ10501 for a customer. He wants to know if we have an application note or example for this device being used in parallel, if it can be used in parallel can the devices share the same feedback network to help save board space?

I did not find any application notes or examples that showed this, If anyone has any comments or suggestions on these questions it would be appreciated.

Best Regards,
Patrick C
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  • Denislav Petkov
    Posted by Denislav Petkov
    on Feb 13 2012 14:03 PM
    Verified Answer
    Verified by Denislav Petkov
    Expert4870 points

    Hello Patrick, 

    Unfortunately, the LMZ10501 is not designed to be used in parallel configuration and won't share the current well. 

    Regards, 

    Denislav 

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  • Peter Galicki
    Posted by Peter Galicki
    on Jan 28 2013 11:57 AM
    Prodigy650 points

    Denislav,

    We are thinking about using 2 LMZ10501 side by side (one for 3.3V and one for 1.8V), both being powered from a single 5.V wall unit accross a toggle switch. Do you have any appnotes or see any problems with this configuration?

    Thanks Peter

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  • Denislav Petkov
    Posted by Denislav Petkov
    on Jan 28 2013 18:45 PM
    Expert4870 points

    Hello Peter, 

    I don't see an issue with this configuration. You can run two (or more) LMZ10501 from the same input. Please monitor the input voltage as you toggle the switch and be sure that the input voltage does not overshoot above the max operating (5.5V) limit after you flip the switch. If you see overshoot, you may need to put additional input cap with higher ESR for damping on the 5V.


    Regards, 

    Denislav 

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