Post Go back to editing

about INTVCC of LTM4630?


Recently I make LTM4630 to output 1V to FPGA VCCINT for 18A.During my design,I find a question about INTVCC with different connect between LTM4630fa datasheet and DS2081-a as following:

the datgasheet tells that INTVCC should connect PGND ,but the DS2081-a connect it to SGND,and there is a 0 ohm between SGND and GND,which is right?


  • Please following the layout of the DC2081a board. Datasheet graphs sometimes don't differentiate SGND and PGND. For uModules with higher current, we usually ask the customer to use a separated SGND ground copper area, and connect the SGND to PGND underneath the unit. SGND is more quiet than PGND and INTVCC can be decoupled to SGND. THANKS!