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Difference between Simple Switcher and Swift

Duane Hopkins
Prodigy 140 points

Hi,

For a new design should the Simple Switcher (LM226xx) be chosen over the Swift Regulator (TPS54xxx) for low current (< 1A).  Is there any documentation outlining the differences between the two.

Thanks

  • 0
    TI__Mastermind 35165 points

    Hi Duane,

    Either a Swift Regulator or Simple Switcher are recommended for new designs. Neither is recommended primarily over the other. Unfortunately there is not any documentation I know of specifically detailing the differences.

    The requirements of the application should help determine which is a better choice. Although two parts appear the same when looking at the input voltage/output current they will likely have different features and performance specifications which may be desirable.

    I recommend looking into both for your application. Let us know if you have an questions on any part numbers specifically.

    Regards,
    Anthony 

  • 0 in reply to Anthony F
    Prodigy 140 points

    Hi Anthony,

    Thanks for the help.  I chose the LM22675-0.5 and built a prototype board based on a design produced using WEBENCH.  The board is all surface mount and components were solder manually.  The board works when new. After a few days a crack develops in the inductor (Bourns SRN8040-101M) case.  The boards keeps working but gradually deteriorates.  Any ideas what is causing this problem? I am considering solder iron temperature or moisture inside the inductor.

    Vin: 16V to 42:

    Vout: 12V

    Iout: 0.5A

    Thanks

    Duane

  • 0 in reply to Anthony F
    Intellectual 510 points

    I also would like to know differences between SWIFT (TM) and SIMPLE SWITCHER ( TM ) TI power devices especially regarding their usage to power Altera FPGAs.

    Why in the TI document "Power Management for Altera® Cyclone® FPGAs" ( SLYT395B ) only SWIFT (TM) TI power devices are recommended to power Altera Cyclone IV PGAs?

    Why not SIMPLE SWITCHER ( TM ) TI power devices?

    What features in SIMPLE SWITCHER ( TM ) TI power devices makes them less suitable, than SWIFT (TM) to power Altera Cyclone IV FPGAs?

    7444.Power Management for Altera ® Cyclone ® FPGAs.pdf

  • 0 in reply to Sergei Vereskov
    TI__Guru**** 191445 points

    SWIFT devices are TI DC/DC converters with integrated switching FETs.  They include voltage mode control, current mode control and proprietary DCAP2 control topologies.  SIMPLE SWITCHER devices are originally from National Semiconductor which is now part of TI.  There may be some overlap in specification between the two product families.  Let me know if you have specific questions about them.

  • 0 in reply to JohnTucker
    Intellectual 510 points

    Please help to choose between TPS54312PWP ( SWIFT, Iout max =3A, V out fixed =1.2V ) and LM2852XMXA-1.2 ( SIMPLE SWITCHER, Iout max =2A, V out fixed =1.2V ).

    Which one is better to provide 1.2V@~1.5A for Cyclone IV GX's digital core if Vin=3.3V and it is drawn from PCI Express PC slot?

    Or maybe there is a better third variant?

  • 0 in reply to Sergei Vereskov
    TI__Genius 11085 points

    I'd suggest you do a Webench design on your conditions and pick the best fit solution.

    Both of the two parts should work fine. There are minor differences between the two and it depends on the application requirement.

    Yang