• LT4321 Mos Selection


    According to LT4321 Mos Selection,

    Vgs_th_min should not lower than 2V.

    Is that any risk on it?

    Will it impact the force current ?

    Because we found lots of Mos Vgs_th_min<2V except Nxperia

    And as Rds_on section said,

    VF is between 20mV and 70mV…

  • Lot / date code for LT4321

    My LT4321 shows the lot / date code of N8615.

    what's the date code?

    I can not find any documentation.


  • Question about adding a capacitor to the signal line going into the IN12 pin of the LT4321

    I am using PoE (10Gbase-T+802.bt T4-CLS8 (PD 71.3W)) through the LT4293+LT4321 solution.

    During verification, there was a phenomenon in which packet loss occurred when PoE of 10Gbase-T link performance was applied, and it was confirmed that symptoms improved…

  • LT4320 implementation with LT4293


    The DC2911A carries LT4321 ideal diode bridge (for 2 lines). Our customer tried to use 2x LT4320 instead of LT4321 with LT4293 and it was not successful. Is there any restriction to use an ideal diode bridge for such application and utilize only LT4321…

  • LT4320 Voltage Range


    It seems this is a relatively basic question but does the LT4320/LT4321 operate down to 12VAC?



  • RE: Θja, Θjc and Pd of LT4321HUF#TRPBF


    LT4321 has a thermal resistance, junction to case, θJC = 4.5° C/W. The θJA = 47° C/W you mentioned is based on a JEDEC 4 layer board.

    Please note, LT4321 is an Ideal Diode Controller. As such, it consumes very little power even during full load…

  • RE: IEEE 802.3bt Backward Compatibility with market in general

    Yes the 802.3bt PSE & PD. LTC4291/LTC4292 and LT4321.

  • Overvoltage Protection over 100V for the LT4293


    My customer wants to design a IEEE802.bt complient PD module with overvoltage protection function for over 100V using the LT4293 + the LT4321.

    Could you please provide any information fot the above application ?


  • RE: LTC4291-1 & LTC4292 Issue

    The DC2685 is the demo board for the LTC4291-1/LTC4292 and is a PSE.

    The LT4321 is an ideal diode controller, not a PD controller.

    I recommend the DC2583A, LT4294 IEEE 802.3bt PD interface demo board for evaluating the PSE.

  • RE: Is there an LTSpice model for LT4295?

    Hi Eric,

    Do you know if there is a new POE solution coming out of the Analog Devices / Linear Tech merger?  Basically I am thinking of a LT4295 solution use iCoupler Analog Devices technology.  Currently to do this I would need to combine the LT4294 with…