LAN9730 Datasheet, PDF (24/61 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

High-Speed Inter-Chip (HSIC) USB 2.0 to 10/100 Ethernet Controller
Datasheet
Chapter 3 Power Connections
The LAN9730/LAN9730i can be operated with the internal core regulator enabled or disabled.
Figure 3.1 illustrates the power connections for operating the device with the internal regulator enabled.
Figure 3.2 illustrates the power connections for operating the device with the internal regulator
disabled. In this mode, +1.2 V must be supplied to the device by an external source.
LAN9730/LAN9730i
+3.3 V
56-PIN QFN
0.1 µF
0.1 µF
0.1 µF
0.1 µF
0.1 µF
51 VDD33IO
25 _VDD33IO
35 _VDD33IO
48 _VDD33IO
52 _VDD33IO
0.5 A
120 Ohm @
100 MHz
0.1 µF
0.1 µF
0.1 µF
4 _VDD33A
8 _VDD33A
15 _VDD33A
+3.3 V
49 _{CORE_REG_EN}
Internal 1.2 V Core
Regulator
ENABLED
+3.3 V (IN)
+1.2 V (OUT)
VDD12CORE
50
1 µF
0.1 µF
Core Logic
VDD12CORE ₂₁
0.1 µF
PLL
&
Ethernet PHY
HSIC
USB PHY
VDD12PLL 9
VDD12USBPLL 17
0.5 A
120 Ohm @
100 MHz
0.1 µF
0.5 A
120 Ohm @
100 MHz
0.1 µF
VDD12A
VSS
0.5 A
120 Ohm @
100 MHz
12
Exposed Pad
0.1 µF
Figure 3.1 Power Connections - Internal Regulator Enabled
Revision 1.1 (05-13-13)
24
DATASHEET
SMSC LAN9730/LAN9730i