AN4938
Power supplies
Figure 1. VDD33USB connected to V
power supply
DD
Figure 2. VDD33USB
VDD50USB connected to external power supply
/
1. V
can be any power supply voltage among V
, V
, V
and V
.
DDx
DDA
DD33USB
DD50USB
DDDSI
2. If the SMPS is available, V
and V
must be wired together to follow the same voltage sequence.
DD
DDSMPS
AN4938 Rev 4
9/46
45
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