Intel EP80579

Intel
®
EP80579 Integrated Processor Product Line—System Power Delivery Guide
Intel
®
EP80579 Integrated Processor Product Line
Platform Design Guide May 2010
82 Order Number: 320068-005US
• One 10 µF,±20% 6.3V X7R capacitors are recommended as bulk decoupling.
6.7.4 VCCAPE (1.2V, PCI Express Power) Decoupling
• Three 0.1 µF ±10%, 16V X7R capacitors are recommended.
• One 10 µF,±20% 6.3V X7R capacitors are recommended as bulk decoupling.
6.7.5 VCC18 (1.8V - DDR2) Decoupling
VCC18 power pins are decoupled separately from the DIMMs. These recommendations
apply only to the VCC18 power pins. The decoupling of the DIMMs DDR2 power pins are
specified below.
• Five 0.1 µF ±10%, 16V X7R capacitors are recommended for the DDR2 power
plane (VCC18) for decoupling.
• Three 10 µF,±20% 6.3V X7R capacitors are recommended as bulk decoupling.
6.7.6 VTTDDR (0.9V - DDR2_VTT) Decoupling
VTTDDR power pins are decoupled separately from the DIMMs. These
recommendations apply only to the VTTDDR power pins.
• Ten 0.1 µF ±10%, 16V X7R capacitors are recommended for the VTTDDR power
plane for decoupling.
• Two 2.2 µF ±10%, 10V X5R capacitors are recommended as bulk decoupling for
VTTDDR power plane decoupling.
6.7.7 V1P8_DDR (DIMM) Decoupling (CRB Power Reference)
These recommendations apply to the decoupling of the DIMMs’ power pins. All
decoupling capacitors should have direct connection to the V1P8_DDR power plane and
two vias to ground.
• Six 100 µF ±20%, 6.3V (electrolytic) capacitors are recommended as bulk
decoupling for the DIMMs’ power pins decoupling.
• Eight 0.1 µF ±10%, 16V X7R capacitors are recommended for the DIMMs’ power
pins decoupling.
6.7.8 VCC33 (3.3V) Decoupling
• Three 0.1 µF ±10%, 16V X7R capacitors are recommended to be placed near the
VCC33 power plane for decoupling. It is recommended that the designer use
ceramic capacitor 0603 package type.
• Ten 10 µF,±20% 6.3V X5R capacitors are recommended as bulk decoupling.
6.7.9 VCC25 (2.5V GbE Voltage) Decoupling
• Three 0.1 µF ±10%, 16V X7R capacitors are recommended to be near the VCC25
power plane for decoupling. It is recommended that the designer use ceramic
capacitor 0603 package type.
• One 2.2 µF ±10%, 10V X5R capacitor is recommended.
• One 10 µF,±20% 6.3V X5R capacitor is recommended as bulk decoupling.