Hi, we’re using the MPQ3446GUE-0002-AEC1 (12 V → 24 V boost, I2C). The public datasheet’s DVS_VOUT table doesn’t match this part: with power-on values (USER00 0x3008, USER01 0x1B21, USER02 0x50CD) it regulates at about 18.9 V, not 55 V. Writing the datasheet’s 24 V codes (0x7C or 0x80) stops switching entirely (BG flat, VOUT = VIN − diode). I2C is verified (no errors, byte order confirmed). Could you send the -0002 register map / OTP defaults and tell us which DVS_VOUT code gives 24 V?
Thanks!