LTC3769 as a SEPIC converter


we have found that the Fig.13 in LTC3769 DS has a possible mistake: INTVCC is tied to BG (MOSFET gate) and it makes the MOSFET open when INTVCC is present. Is it correct that the connection of INTVCC and BG pins should be simply cut and then the SEPIC converter starts-up and works correctely. 

Also I have done an LT Spice simulation and the simulatioon shows that there should not be a connection between INTVCC and BG pins.

Top Replies

    •  Analog Employees 
    Jun 9, 2020 +2 verified

    Hi DmitryVasilenko,

    This question was also asked to an ADI FAE. The design engineer is already notified for necessary correction. Thank you for the post.