Silicon Laboratories C8051F347 - Manual (Page 70)

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
70 Rev. 1.3
Figure 8.1. REG0 Configuration: USB Bus-Powered
Figure 8.2. REG0 Configuration: USB Self-Powered
Voltage Regulator (REG0) 5 V In
3 V Out
VBUS Sense
REGIN
VBUS
From VBUS
To 3 V
Power Net
Device
Power Net
VDD
Voltage Regulator (REG0) 5 V In
3 V Out
VBUS Sense
REGIN
VBUS
To 3 V
Power Net
Device
Power Net
VDD
From 5 V
Power Net
From VBUS