Intel EP80579

Intel
®
EP80579 Integrated Processor Product Line—System Power Delivery Guide
Intel
®
EP80579 Integrated Processor Product Line
Platform Design Guide May 2010
78 Order Number: 320068-005US
• Analog Voltage Filter
• Bandgap Filter
6.6.4.1 Recommended Filter Topologies for Analog (PLL) and Bandgap Filters
Figure 47 shows the recommended filtering for Analog (PLL) and Bandgap supplies, and
Table 13 provides the recommended component values for the filters.
6.6.4.1.1 Analog Filtering
The Analog filtering applies to the following signals:
• VCCARX - 1.2V Analog Power for SATA AFE Receiver
• VCCATX - 1.2V Analog Power for SATA AFE Transmitter
• VCCAPLL - 1.2V Analog Power for SATA PLL
• VCCAUSB12 - 1.2V Analog Power for USB PLL
• VCCAPE0PLL12 - 1.2V Analog Power for PCI Express PLL
• VCCAHPLL - 1.2V Analog Power for CRU PLL
6.6.4.1.2 Bandgap Filtering
The Bandgap filtering applies to the following signals:
• VCCSATABG3P3 - 3.3V Band-Gap Power for SATA AFE Reference Circuitry
• VCCABG3P3_USB - 3.3V Band-Gap Power for USB AFE Reference Circuitry
• VCCABGP033 - 3.3V Band-Gap Power for PCI Express Reference Circuitry
Figure 47. Analog/Bandgap Filter Topology
B-0
VCC
1.00 in.
To Analog Pin
L
C1 C2
R