Datasheet

CP2102/9
20 Rev. 1.8
Figure 7. CP2102 Configuration 2: USB Self-Powered
Figure 8. CP2109 Configuration 2: USB Self-Powered
4.7 F
0.1 F
Voltage Regulator (REG0)5 V In
3 V Out
VBUS Sense
REGIN
VBUS
To 3V
Power Net
Device
Power Net
V
DD
CP2102
From 5 V
Power Net
From VBUS
1.0 F 0.1 F
4.7 F
0.1 F
Voltage Regulator (REG0)5 V In
3 V Out
VBUS Sense
REGIN
VBUS
To 3V
Power Net
Device
Power Net
V
DD
CP2109
From 5 V
Power Net
From VBUS
1.0 F 0.1 F
Note 1 : For self-powered systems where VDD or REGIN may be unpowered when VBUS is
connected to 5 V, a resistor divider (or functionally-equivalent circuit) on VBUS is required
to meet the absolute maximum voltage on VBUS specification in the Electrical
Characteristics section.
47 k
24 k
Note 1
(Optional)