• LTM4668 soft-start time


    I have a question about the soft-start time of LTM4668 powering the FPGA.
    I can find the typical time is 800us, so what are the minimum and the maximum values?

    Because FPGA needs a power ramping between 200us and 4ms.

    Best Regards,

  • PGOOD in LTM4668 won't go high

    I am using the LTM4668 in a multi-channel parallel configuration.  From the picture below, channel 1 and 2 are tied together and are programmed to output 1V.  The regulator is outputting 0.95V, but PGOOD won't go high.  Am I doing anything wrong?

  • Anyone succeeded to get higher than 1.8V output from LTM4668?

    The LTM4668A is out of stock worldwide and i need to assemble few engineering cards.

    One of the outputs is 2.5V/300mA but Vout maximum for LTM4668 is 1.8V according to data sheet...

  • RE: About θjc of LTM4668A


    this should be a typo in the datasheet. The smaller value should be the thetaJCbottom value. Similar to the definition in the LTM4622 datasheet (similar package size):



    Thanks for spotting this error

    kind regards


  • The 1.82mm Real Estate Deal

    It is a situation to which everyone can relate; you are sitting in a favorite chair, a lamp glowing brightly above as you read a book or magazine. Suddenly, someone in your house starts vacuuming or using a hair dryer. The light, once warm and bright…

  • RE: part validity & Datasheet

    Hi Bharti,

    The LTM4668 is not yet released. Once the part is released, the datasheet will be available.


  • LTM4668A not availabile in LTpowerCAD

    The LTM4668A web page https://www.analog.com/en/products/ltm4668a.html#product-tools indicates that there are models for LTpowerCAD. I have downloaded the latest version and sync'ed but the LTM4668A or the LTM4668 do not seem to be available.


  • RE: LTM4668A datasheet vs LTPowerCAD

    Hi RKR,

    Please sync release for LTPowerCad as some changes have been implemented:

    1) Standard default switching frequency is 2.25MHz for LTM4668A

    2) The switching frequency can now be changed to mimic an external switching frequency source (window of…

  • RE: LTM4668A output current at burst mode


    Thank you for your reply.

    My specification is 6V input -> 0.9V output 1.2A.   ( the other outputs are 0.95V 0.2A, 1.8V 0.3) 

    Minimum on time of LTM4668A is 60ns TYP and that of above condition is 68ns.

    So I thought that  it might be difficult to…