Design Guide

A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
PwrPad
PwrPad
Vtt Sense
Vtt Sense
Vtt Sense
Single point
sense
near load
Single point
sense
near load
Default: J3G1 No Jumper
Non-EV Support EV Support
Stuff
No Stuff
R3V6
R3V6
EV Support Resistor Options
Only one output enabled at a time
R3G5
R3V7
R3G10
R3G5
R3V7
R3G10
4.401
DDR VR
A
44 50Monday, September 15, 2003
Intel 855GM/GME CRB <Doc>
Title
Size Document Number Rev
Date: Sheet
of
Project:
REFIN_2
COMP_2
VSENSE_2_D
OPAMP1_EN
+VDDR
VBIAS_2
BOOT_1
PH_2
FSEL
VSENSE_2
GND_DDR
OPAMP2_EN
FSEL
RT_2
V2.5_DDR_D
COMP_1_D
COMP_2_D BOOT_2
VSENSE_1_D
VBIAS_1
SS/ENA_1
VSENSE_1
PH_1
COMP_1
RT_1
SM_VREF_DIMM 11,12
+V520..23,27,36,37,45
+V3.315,18..20,23,27,30,32,35,37,38,45
+V2.5_DDR 11,12,46
+V520..23,27,36,37,45
+V2.59,11,12
DDR_VR_PWRGD 39
+V520..23,27,36,37,45
PM_SLP_S4#19,20,32,37,38,45
+V520..23,27,36,37,45
+V520..23,27,36,37,45
+V1.25S 14,46
PM_SLP_S3#19,25,32,37,38,45
SM_VREF_MCH_EV 46
SM_VREF_DIMM_EV 46
SM_VREF_MCH 7
+V2.5_GMCH_SM9,10
+V2.5_GMCH_SM9,10
1.25V_DDR_EV 46
2.5V_DDR_EV 46
+V2.5_GMCH_SM9,10
R3G12 0
R4G3 43.2_1%
C3V3
0.01UF
R4H1
0.01_1%
C4H1
150uF
C3V5
0.082uF
R3V8
10K
C4F1
0.1UF
R3V3
5.49k_1%
VDD+
GND
-
+
U3G2A
TLV2463
1
3
2
4
5
10
Note for layout: This part has
special pad on it's underside
U3G1
TPS54610
1
2
3
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
4
27
28
AGND
VSENSE
NC/Comp
BOOT
PH0
PH1
PH2
PH3
PH4
PH5
PH6
PH7
PH8
PGND4
PGND3
PGND2
PGND1
PGND0
VIN4
VIN3
VIN2
VIN1
VIN0
VBAIS
SS/ENA
PWRGD
FSEL
RT
R3V12
3.92k_1%
R3V4
25.5k_1%
C3V1
8200pF
C3G11
0.1UF
Note for layout: This part has
special pad on it's underside
U3G3
TPS54672
1
2
3
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
4
27
28
AGND
VSENSE
NC/Comp
BOOT
PH0
PH1
PH2
PH3
PH4
PH5
PH6
PH7
PH8
PGND4
PGND3
PGND2
PGND1
PGND0
VIN4
VIN3
VIN2
VIN1
VIN0
VBAIS
REFIN
STATUS
ENA
RT
C3H2
150uF
R3V2 221_1%
R3G10 0
C6J2
150uF
R3G6 0
R3G2
10K_1%
R3F22
NO_STUFF_10K
R3G9
10K
R3V5
NO_STUFF_10K
J3G1
1 2
R3V9
267_1%
C4H5
0.1UF
C4J1
150uF
C3F6
0.1UF
R3G3
10K_1%
L4G1
4.7uH
1 2
R3V11
10K_1%
R4G1 5.49k_1%
R3V10 NO_STUFF_0
R3F21 43.2_1%
L4H1
4.7uH
1 2
C3G12
0.1UF
C3G8
150uF
VDD+
GND
-
+
U3G2B
TLV2463
9
7
8
4
6
10
R3V7
10K
R3U2
NO_STUFF_10K_1%
R3G13 100K
R2G9
10K_1%
R3G5 0
C3H1
0.022uF
C3G9
0.022uF
C3V4
8200pF
R3W3
10K_1%
C3H4
0.1UF
R3W1
4.99k_1%
CON3_HDR
J3G2
3
2
1
C3V2
5600pF
R3G7
10K_1%
R3V6
NO_STUFF_10K
C3G1
0.01UF
C6J1
150uF
C3G10
0.1UF
R3V13
NO_STUFF_4.99k_1%
C3H3
150uF
R3W2
NO_STUFF_0
C3G5
47pF
R3V1 10K_1%
C3G7
150uF
C3G13
220PF