USB 2.0 Hi-Speed 2-Port Hub Controller
Datasheet
Chapter 4 Power Connections
4.1
Integrated Power Regulators
The integrated 3.3V and 1.2V power regulators allow the device to be supplied via a single 3.3V
external power supply.
The regulators are controlled by RESET_N. When RESET_N is brought high, the 3.3V regulator will
turn on. When RESET_N is brought low the 3.3V regulator will turn off.
4.2
Power Connection Diagrams
Figure 4.1 illustrates the power connections for the USB2532.
Single Supply Application
3.3V Internal
Logic
1.2V
Core Logic
3.3V I/O
+3.3V
Supply
1.2V Regulator
3.3V Regulator
VDDA33
VSS
(IN)
(OUT)
(IN)
(OUT)
(Bypass)
VDD33
USB2532
(2x)
VDDA33
VDDA33
VDDCR12
1.0uF
Figure 4.1 Power Connections
Revision 1.0 (06-17-13)
20
SMSC USB2532
DATASHEET
SMSC [ SMSC CORPORATION ]
