ST STM32H7B3I-DK Discovery

Figure 13. Config3 - SMPS and LDO cascaded
Figure 14. Config4 - External SMPS
To change the power supply configuration, some reworks are needed on the STM32H7B3I-DK board as detailed
in the table below.
Table 8. Internal SMPS / LDO and board configuration
Config1
SMPS OFF
LDO ON
Config2
SMPS ON
LDO OFF
(Default config)
Config3
(SMPS and LDO
cascaded)
SMPS ON
LDO ON
Config4
(External SMPS)
SMPS ON
LDO ON
SB2 ON - - -
R14 ON - - -
SB39 ON - - -
R71 ON ON ON ON
UM2569
Power supply
UM2569 - Rev 6
page 17/53