• LTM4668A INTVCC in polyphase


    LTM4668A datasheet P.7 says that FB pins for all slave channels  is connected to INTVCC  in PolyPhase operation.

    INTVCC of LTM4668A is 5V output LDO  but my input specification is 5V.

    So INTVCC output may be under 5V.

    In that case,  ,is there any p…

  • RE: LTM4668A

    Hi JSiko:

    The VINs of the LTM4668A are separate. You can use them independently.



  • Threshold at which Pulse-skipping mode of LTM4668A is enabled

    Hi all,

    Please tell us two points about the specifications of LTM4668A.


    1. Pulse-skipping mode threshold

    Is there an output current threshold that switches between high load mode and low load mode when used in Pulse-skipping Mode?


  • Dual Vin / split Vin for LTM4668A possible?

    I wonder if I can use LTM4668A with 2 Vin sources?

    In that case Vin1 (Pin A4 + B4) would be the source for Vout1 and Vout2 and Vin2 (Pin F4 + G4) would be the source for Vout3 and Vout4.

    The Block Diagram on page 6 in the datasheet suggests that each Vin…

  • RE: About θjc of LTM4668A


    datasheet of LTM4668A has been changed to reflect the correct theta values on page 2:

  • LTM4668A and duty cycle and output voltage


    Can you explain t_on_min on the D/S of LTM4668A.  The image below shows t_on_min = 60ns


    If the input voltage is 12V then the min output voltage possible is:

    Vout = t_on_min x 12V x Fsw = 60ns x 12V x 2.25MHz = 1.62V


    Did I get this right? The front…

  • LTM4668A output current at burst mode


    LTM4668A datasheet rev.A P.11 says below.

    "During Burst Mode operation, the peak current of the inductor is set to approximately 400mA in normal operation
    even though the output of the error amplifier (COMP) indicates a lower value."

  • LTM4668A PGOOD input current

    Good evening,

    I have got a question about the PGOOD open drain inputs of the LTM4668A.
    It says that those pins are pulled to GND when the output voltage leaves the aimed voltage window.
    In this case there is a resistance of R_pgood 275 Ohm left(?).

    I would…

  • Looking for at least few LTM4668A

    Looking for at least few LTM4668A DCDC module. it was vanished from inventory anywhere, someone took them all... and we need some of them to debug our designs.
    Can someone help?

  • LTM4668A About thermal shutdown


    I have a question.

    Please give me an answer.

    I want to use LTM4668A.

    I'm checking the data sheet,
    Please tell me about thermal shutdown.

    Is the thermal shutdown of the LTM4668A correct at 150 ° C?
    Also, I think that thermal shutdown will self…