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7
Reference circuitry:
In this section there are 5 reference circuits to show how to design an application circuit with this
module.
Reference Circuit configuration 1
Configurations summary for reference circuit 1
Config no.
Main Supply
EXT Supply Output USB
VDDH VDD
Config.1 Battery/Ext.regulator N/A Yes Yes
Ex
planation of symbols in reference circuit 1 schematic
Symbol Parameter Min. Typ. Max. Units
V
DDH
Main supply voltage in high voltage mode 2.5 3.7 5.5 V
V
BUS
Supply voltage on VBUS pin 4.35 5 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