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8
Reference Circuit configuration 2
Configurations summary for reference circuit 2
Config no.
Main Supply
EXT Supply Output
USB
VDDH
VDD
Config.2
Battery/Ext.regulator
N/A
Yes
No
Explanation of symbols in reference circuit 2 schematic
Symbol
Parameter
Min.
Typ.
Max.
Units
V
DDH
Main supply voltage in high voltage mode
2.5
3.7
5.5
V
V
EXT
Voltage output on VDD when supplied from internal
regulator (REG0). V
DDH
is the input to REG0.
1.8
3.3
V
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