Intel VC820 Design Guide - Page 192
Voltage Regulators, VCC 5V DUAL VOLTAGE SWITCHER
View all Intel VC820 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 192 highlights
8 7 6 5 4 3 2 1 Voltage Regulators AGP VDDQ VOLTAGE REGULATOR VCC 5V DUAL VOLTAGE SWITCHER The VCC5DUAL plane should not drive any logic components requiring 5V. It should be used only for further regulation of lower voltage power planes because the true voltage of VCC5DUAL will not remain constant D Rdson of the FET is not negligible for large currents VCC5SBY VCC12 C347 47UF VCC5 C324 47UF VCC5DUAL R330 1K VCC12 1 2 VCC3_3 1 2 C173 + 47UF D VDDQ C193 + 10UF SN74LVC07A has 5V input and output tolerance. VCC5SBY VCC3_3SBY VCC5SBY 14 R331 1K C U18 9,31 SLP_S3# 74LS1432 14VCC 6 PWROK 5 U14 VCC 1 2 7,9,16,31 VD_G1 7 VD_G2 7 GND GND SN74LVC07A VCC5DUAL_R Q12 SI4562DY 1 S1 2 G1 3 S2 4 G2 D1 8 D1A 7 D2 6 D2A 5 Q13 C R340 3 B1 1K VD_G3 2 E MMBT3904LT1 VCC1_8 C352 + 1500UF C336 + 1500UF 1 1 2 2 VCC3_3 R218 1K R363 0K C174 + 1UF No stuff R363 1 2 220UF 1+ 2 C160 VR6 LT1575 1 SHDN 2 VIN 3 GND 4 FB IPOS 8 Q6 3 INEG GATE 7 6 VDDQ_G R135 VDDQ_G2 1 1 3 COMP 5 5.1-5% 2 2 VDDQ_COMP C164 10PF 2 + 1VDDQ_COMP_R R137 C168 0.001UF 7.5K-1% R141 IRL2203NS C 11111 22222 301 1% C200 + 1UF-X7R C225 + 1UF-X7R C211 + 1UF-X7R C179 + 1UF-X7R C242 + 22UF R158 2.2K VCC3_3 VTT1_5 VTT 1.5 VOLTAGE REGULATOR VR4 LT1587-1_5 VOUT 2 3 VIN 1 1 1 GND 1 C142 + 100UF C124 + 100UF C104 + 1UF-X7R 2 2 2 B R361 1K VR_SHUTDOWN Q16 C 3 VR_SDB B 1 2 E MMBT3904LT1 TYPEDET# 19 R360 10K Q7 C 3 B1 2 E MMBT3904LT1 VDDQ_FB R146 1.21K-1% Route VR6 GND to VDDQ output caps and then via to ground. B R362 1K VCC3_3 1 VCC 1.8 VOLTAGE REGULATOR VR8 LT1587ADJ VOUT 2 3 VIN 1 ADJ 1 VCC1_8_ADJ R311 301-1% C333 + 100UF C108 + 100UF C311 + 100UF VCC1_8 VCC2_5SBY 1 1 1 + BAT17 AC CR11 VCC5 VCC2_5 VOLTAGE REGULATOR VR5 LT1587ADJ 2 2 2 VOUT 2 3 VIN 1 1 ADJ 1 VCC2_5_ADJ R134 100-1% VCC2_5 1 2 VCC5DUAL VCC3_3SBY VCC3_3SBY VOLTAGE REGULATOR VR1 LT1529-3_3 5 VIN VOUT 1 1 1 4 SHDN# SENSE 2 1 2 2 2 C91 + 100UF TAB 6 GND3 3 C35 + 1UF-X7R C15 + 330UF-T510 C167 + 100UF A 2 2 2 2 A C161 + 1UF-X7R C159 + 100UF R133 100-1% C268 + 1UF-X7R C319 + 100UF R309 131-1% Place C311 at regulator. Place C108 and C333 at RIMM termination 8 7 6 5 4 TITLE: INTEL(R) 820 CHIPSET CUSTOMER REFERENCE BOARD REV: VOLTAGE REGULATORS 1.01 R PCD PLATFORM DESIGN DRAWN BY: PROJECT: 1900 PRAIRIE CITY ROAD FOLSOM, CALIFORNIA 95630 LAST REVISED: SHEET: 11-18-1999_11:24 29 OF 36 3 2 1