27/30
8.3 Power Source Selection and Sequencing
The 96Boards specification calls for only one power source to be applied to the board at a time.
Following this requirement, the user of the SD 600eval board should never apply power to the board from J2 and the SYS_DCIN
on the Low Speed Expansion connector at the same time.
Upon applying power to the SD 600eval board, buck regulators will be enabled and will start regulating their target voltages.
PMIC has 9 buck regulators, 21 LDO’S & 9 voltage switches. Out of these voltage generators, SD 600eval uses 31 voltage rails (9
buck regulators, 16 LDO’s & 6 voltage switches).
The 5V buck regulator (U17) will power up the on-board PMIC PMM8920. The sequencing of all power rails is configured within
the PMM8920 configuration scheme. The user has no access to alter, modify or change the PMIC power up sequencing.
The default power up sequence for PMIC is shown in the following diagram:
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
