User`s guide

Setting up Power Management
i.MX53 System Development User’s Guide, Rev. 1
5-2 Freescale Semiconductor
If either of these bits are cleared, the internal LDO source provides the respective PLL supply. If they are
set, the fuse is blown and PLL power must be provided from the external pad, which is not recommended
due to possible noise injections or other issues.
Figure 5-1 shows the internal LDOs.
Figure 5-1. Internal LDOs
i.MX53
VDD_REG
2.5 V
VDD_ANA_PLL
VDD_DIG_PLL
VDDA
VDDAL1
VP
1.
8
V
1.3 V
NVCC_RESET