an1553

Application Note AN1553
Author: Jia Wei
ISL62881CGPUEVAL2Z Evaluation Board User Guide
Hardware Description
Interface Connections
The ISL62881CGPUEVAL2Z evaluation board
demonstrates the performance of the ISL62881C
single-phase synchronous-buck PWM GPU VCORE
controller implementing Intel IMVP-6.5 protocol. The
ISL62881C features Intersil's Robust Ripple Regulator
(R3™) technology. An on-board dynamic-load generator
is included for evaluating the transient-load response. It
applies a 300µs pulse of approximately 0.2Ω load across
VO and PGND.
• VIN: Input Voltage to the Power Stage
- J5: VIN Positive Power Input
- TP31: VIN Positive Voltage Sense
- J6: VIN Return Power Input
- TP32: VIN Return Voltage Sense
Contents of this document include:
• VO: Regulated Output Voltage
- J12: VO Positive Power Output
- J14: VO Return Power Output
• +5V: +5V Input Voltage
- TP29: +5V Positive Input
- TP30: +5V Return Input
• Design Criteria
• Recommended Test Equipment
• Interface Connections
• +12V: Input Voltage for the Dynamic-load Generator
- TP3: 12V Positive Input
- TP2: 12V Return Input
• Switch Descriptions
• DIP Switch Descriptions
• Jumper Descriptions
• Evaluation Board Documentation
- Bill of materials
- Schematic
- Silk-screen plots
- Board layer plots
TP18 TP14
RTN
_
J6
PGND
VSEN
on
S3
off
1
D1
DPRSLPVR
Test Set-Up
• Test Point Descriptions
0
S1
0 U2 1
VID0
VID1
VID2
VID3
VID4
VID5
VID6
Vin
+
J5
VIN
TABLE 1. DC/DC DESIGN CRITERIA
PARAMETER
VALUE
UNITS
VIN
4.5 to 20
VDC
VO
0 to 1.5
VDC
J16 TP37
+3.3V
TP29
+5V
Full-load
PWM Frequency
26
ADC
300
kHz
Recommended Equipment
• (Qty. 1) Adjustable 25V, 10A Power Supply
• (Qty. 1) Fixed 5V, 100mA Power Supply
• (Qty. 1) Fixed 12V, 100mA Power Supply
TP30
+
_ 5V
PGND
ISL62881CGPUEVAL2Z
TP3
J12
VCORE
TP2
J14
on
S2
off
PGND
J10
VCORE
FIGURE 1. TEST SET-UP
• (Qty. 1) Adjustable Constant Current Electronic Load
Switch Descriptions
• (Qty. 1) Digital Voltmeter
• S3: Enable
- OFF: Short the VR_ON pin to GND (disable PWM)
- ON: Allow the VR_ON pin to pull-up to +5V
(enable PWM)
• (Qty. 1) Four-Channel Oscilloscope
• S2: Dynamic Load
- OFF: On-board dynamic load disabled
- ON: On-board dynamic load enabled
March 24, 2010
AN1553.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Application Note 1553
DIP-Switch Descriptions
Test Point Descriptions (Continued)
• S1: Set the control signals
- S1.1: Set the DPRSLPVR signal
- S1.2: Set the DPRSTP# signal
TEST POINT
• U2: Set the VID
Jumper Descriptions
• J16: If installed, the +5V rail supplies the +3.3V rail
to the auxiliary circuit on the board. DO NOT APPLY
+3.3V TO TP37/TP30 WHILE J16 IS
INSTALLED! IT’LL SHORT THE +5V AND THE
+3.3V POWER SUPPLIES. When measuring board
efficiency, uninstall J16 and apply +3.3V to
TP37/TP30.
Test Point Descriptions
TEST POINT
J7
DESCRIPTION
Scope-probe socket for measuring
PHASE1.
DESCRIPTION
TP12
Input side of the compensator.
TP13
Monitor the PGOOD pin.
TP14
Monitor the VSEN pin.
TP16
Monitor the CLK_EN# pin.
TP17
Monitor the VR_ON pin.
TP18
Monitor the RTN pin.
TP19
Monitor the positive side of C82.
TP20
Monitor the negative side of C82.
TP21
Monitor the VID6 pin.
TP22
Monitor the VID5 pin.
TP23
Monitor the VID4 pin.
TP24
Monitor the VID3 pin.
TP25
Monitor the VID2 pin.
J10
Scope-probe socket for measuring VO.
TP26
Monitor the VID1 pin.
J15
Scope-probe socket for measuring the
current of the on-board transient-load
emulator.
TP27
Monitor the VID0 pin.
TP28
Monitor the IMON pin.
TP1
Monitor the on-board 1.2V power supply.
TP29
+5V power supply positive input.
TP2
+12V power supply return input.
TP30
+5V power supply return input.
TP3
+12V power supply positive input.
TP31
VIN positive voltage sense.
TP4
Monitor the COMP pin.
TP32
VIN return voltage sense.
TP5
Monitor the VW pin.
TP33
Monitor MOSFET Q3 gate signal.
TP6
Monitor the FB pin.
TP37
+3.3V power supply positive input.
TP7
Monitor the DPRSLPVR pin.
Bill of Materials
QTY
REFERENCE
VALUE
1
PCB
1
C1
0.01µF
1
C11
1
C12
1
DESCRIPTION
MFG.
PART NUMBER
PACKAGE
Multilayer Cap, 16V, 10%
GENERIC
H1045-00103-16V10
SM0603
390pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00391-16V10
SM0603
330pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00331-16V10
SM0603
C13
1000pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00102-16V10
SM0603
0
C14, C15, C19, C39,
C44, C42, C43, C47C50, C53, C62-C78,
C81, C86
DNP
5
C16, C2, C22, C23,
C79
1µF
Multilayer Cap, 16V, 20%
GENERIC
H1045-00105-16V20
SM0603
2
C17, C30
0.22µF
Multilayer Cap, 25V, 10%
GENERIC
H1045-00224-25V10
SM0603
1
C18
0.27µF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00274-16V10
SM0603
3
C20, C45, C58
0.1µF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00104-16V10
SM0603
1
C21
0.047µF Multilayer Cap, 16V, 10%
GENERIC
H1045-00473-16V10
SM0603
ISL62881GPUEVAL2ZREVB
2
AN1553.0
March 24, 2010
Application Note 1553
Bill of Materials (Continued)
QTY
REFERENCE
VALUE
1
C25
56µF
3
C27, C33, C80
10µF
Multilayer Cap, 25V, 20%
GENERIC
H1065-00106-25V20
SM1206
1
C3
390pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00391-16V10
SM0603
2
C52, C57
220µF
SPCAP, 2V, 7MΩ
PANASONIC
EEXSX0D221E7
1
C4
1000pF
Multilayer Cap, 16V, 10%
GENERIC
H1045-00102-16V10
SM0603
2
C40, C41
22µF
Multilayer Cap, 6.3V, 20%
SM0805
2
C55, C60
10µF
DESCRIPTION
Radial Cap, 25V, 20%
SANYO
PART NUMBER
25SP56M
TAIYO
JMK212BJ226MG-T
MURATA
GRM21BC80J226M
Kyocera
CM21X5R226M04AT
TDK
C2012X5R0J226MT009N
PACKAGE
CASE-CC
TAIYO
JMK212BJ106MG-T
MURATA
GRM21BR60J106ME19
Kyocera
CM21X5R106M06AT
TDK
C2012X5R0J106MT009N
Multilayer Cap, 16V, 10%
GENERIC
H1045-00470-16V10
SM0603
0.033µF Multilayer Cap, 16V, 10%
GENERIC
H1045-00333-16V10
SM0603
SSL-LXA3025IGC
LED_3x2_5MM
47pF
Multilayer Cap, 6.3V, 20%
MFG.
SM0805
1
C6
1
C82
1
D1
3mmx2.5mm Surface Mount Lumex
Red/Green LED
1
J10
Scope Probe Test POint PCB
Mount
TEKTRONIX
131-4353-00
TEK131-4353-00
Wire Connector Lug
BURNDY
KPA8CTP
KPA8CTP
2 Pin Header 2.54mm
(0.100) Pitch
BERG?FCI
69190-202
CONN2
0
J15, J7
2
J12, J14
DNP
1
J16
1
J5
Binding Post Red
JOHNSONCOMP
111-0702-001
111-07XX-001
1
J6
Binding Post Black
JOHNSONCOMP
111-0703-001
111-07XX-001
1
L1
Inductor, Inductance 20%,
DCR 7%
PANASONIC
ETQP4LR56AFC
10mm x 10mm
2
Q1, Q14
N-Channel EMF Effect
Transistor (Pb-Free)
FAIRCHILD
2N7002-7-F
SOT23
1
Q15
N-Channel 30V (D-S)
MOSFET
VISHAY
SUD50N03-07
TO-252AA
2
Q2, Q8
N-Channel Power MOSFET
IR
IRF7821
PWRPAKSO8
2
Q3, Q9
N-Channel Power MOSFET
IR
IRF7832
PWRPAKSO8
1
R1
49.9
Thick Film Chip Resistor, 1% GENERIC
H2511-049R9-1/16W1
SM0603
1
R10
2.37k
Thick Film Chip Resistor, 1% GENERIC
H2511-02371-1/16W1
SM0603
1
R102
49.9k
Thick Film Chip Resistor, 1% GENERIC
H2511-04992-1/16W1
SM0603
2
R104, R105
249
Thick Film Chip Resistor, 1% GENERIC
H2511-02490-1/16W1
SM0603
1
R106
0.2
Thick Film Chip Resistor, 1% GENERIC
H2515-00R50-1W1-T
SM2512
0
R109, R110, R111,
R113, R114, R121,
R2, R26, R4, R44,
R62, R68, R77, R87,
R93, R99, R107
DNP
1
R11
3.48k
Thick Film Chip Resistor, 1% GENERIC
H2511-03481-1/16W1
SM0603
0.56µH
3
AN1553.0
March 24, 2010
Application Note 1553
Bill of Materials (Continued)
QTY
REFERENCE
VALUE
DESCRIPTION
MFG.
3
R13, R15, R103
499
1
R16
47.5k
Thick Film Chip Resistor, 1% GENERIC
H2511-04752-1/16W1
SM0603
2
R17, R18
10
Thick Film Chip Resistor, 1% GENERIC
H2511-00100-1/16W1
SM0603
2
R19, R23
1.91k
Thick Film Chip Resistor, 1% GENERIC
H2511-01911-1/16W1
SM0603
16
R20, R22, R24, R25,
R27, R29, R32, R33,
R34, R35, R40, R52,
R56, R62, R87,
R112
0
Thick Film Chip Resistor, 1% GENERIC
H2511-00R00-1/16W1
SM0603
9
R21, R28, R36, R39,
R43, R45, R46, R49,
R51
10k
Thick Film Chip Resistor, 1% GENERIC
H2511-01002-1/16W1
SM0603
1
R30
1.07k
Thick Film Chip Resistor, 1% GENERIC
H2511-01071-1/16W1
SM0603
1
R37
1
Thick Film Chip Resistor, 1% GENERIC
H2511-01R00-1/16W1
SM0603
1
R38
11k
Thick Film Chip Resistor, 1% GENERIC
H2511-01102-1/16W1
SM0603
1
R41
2.61k
Thick Film Chip Resistor, 1% GENERIC
1
R42
2
R5, R80
100
1
R50
7.15k
2
R59, R96
0
1
R6
8.66k
1
R63
1
R7
1
S1
2
S2, S3
1
Thick Film Chip Resistor, 1% GENERIC
PART NUMBER
H2511-04990-1/16W1
PACKAGE
SM0603
H2511-02611-1/16W1
SM0603
ERT-J1VR103J
SM0603
Thick Film Chip Resistor, 1% GENERIC
H2511-01000-1/16W1
SM0603
Thick Film Chip Resistor, 1% GENERIC
H2511-07151-1/16W1
SM0603
Thick Film Chip Resistor, 1% GENERIC
H2511-08661-1/16W1
SM0603
1.82k
Thick Film Chip Resistor, 1% GENERIC
H2511-01821-1/16W1
SM0805
261k
Thick Film Chip Resistor, 1% GENERIC
H2511-02613-1/16W1
SM0603
SD Series Low Profile Dip
Switch
C&K
SD02H0SK
DIPSWSMT-4
SPDT On-None-On SMT
Ultraminiature Toggle
Switch
C&K
GT11MSCKE
GT13MSCKE
S4
Schottky Barrier (Double)
Diode
DIODES
BAT54S
SOT23
4
TP2, TP3, TP29,
TP30
Test Point Turret 0.15 Pad
0.1 Thole
KEYSTONE
1514-2
TP-150C100P
28
TP1, TP4-TP7,
TP12-TP14,
TP16-TP28,
TP31-TP33, TP37,
TP40
Miniature White Test Point
0.100 Pad 0.040 Thole
KEYSTONE
5002
MTP500X
0
TP38, TP39
1
U1
Low Volt Precision
Adjustable Shunt Regulator
ON-SEMI
TLV431ASNT1
TSOP-5
1
U2
SD Series Low Profile Dip
Switch
C&K
SD07H0SK
DIPSWSMT-14
1
U4
rPGA989 CPU Socket
FOXCONN
1
U5
100V/2A Peak High
Frequency Half Bridge
Driver (Pb-Free)
INTERSIL
HIP2100IBZ
SOIC8_150_50
1
U6
IMVP-6.5 PWM Controller
INTERSIL
ISL62881CHRTZ
QFN-28
10k NTC Thermistor, 10k NTC
PANASONIC
Solder Joint (Heavy Duty)
DNP
4
AN1553.0
March 24, 2010
VID0
TP27
11
5
10
6
9
7
8
14
100
VID0
VID1
VID2
VID3
VID4
VID5
VID6
13
12
11
10
9
8
MST7_SPST
10K
10K
R51
10K
R49
R80
VID1
TP26
VID2
TP25
VID3
VID4
TP24
10K
R46
12
4
VSEN
EP
UGATE
16
15
OUT
PHASE
UGATE
OUT
BOOT
OUT
8
9
10
11
12
13
14
C21
R50
NOTE: ROUTE
GOING
ROUTE
TP28
GOING
IMON
IN
J16
1 12 2
TP29
5V
UGATE TRACE IN PARALLEL
TO THE SOURCE OF Q1 AND
LGATE TRACE IN PARALLEL
TO THE SOURCE OF Q3 AND
WITH THE PHASE1 TRACE
Q2.
WITH THE VSSP TRACE
Q4.
VSSSENSE
IN
VSUM+
IN
VSUM-
0.1UF
C20
DNP
R44
10K 2.61K
NTC
R41
11K
R38
3.3V
PGND
7.15K
TP19
DNP
C18
R35 0.27UF
C19
0
-----> R42
DNP
VSUM-
R109
TP37
TP30
PLACE NEAR L1
TP20
C81
DNP
0.033UF
C15
R30
1.07K
IN
+5V
OUT
VSUM+
0.22UF
1UF
C17
1000PF
0
+5V
VIN
IN
R40
0
1UF
17
R37
1
1UF
C2
PHASE
LGATE
18
C23
VSSP
ISL62881C
FB
R52
19
1UF
COMP
0
TP18
10K
R45
10K
R43
10K
R39
R36
VR_ON
VID6
VID5
VID4
VID3
VID2
DPRSLPVR
LGATE
C82
C13
TP23
VID5
TP21
TP22
VID6
IN
VID0
0
0
R24
0 R25
0 R27
0 R29
0 R32
DNP
R114
VW
C16
330PF
10
VCCP
DNP DNP
IN
IN
U6
20
R20
C12
3
21
0.047UF
VSEN
R17
R18
VID0
RBIAS
TP14
29
PGOOD
R26
VSSSENSE
7
10
13
+3.3V
VID1
CLK_EN#
RTN
VCCSENSE
6
C22
4
6
C14
IN
5
7
DNP
VCORE
<VSEN>
R11
3.48K
R33
VID1 IN
0 R34
VR_ON
TP17
VID6 IN
VID5 IN
VID4 IN
VID3 IN
VID2 IN
3
R22
0
4
2
28
27
26
25
24
23
22
2
R16
2
R7
261K
10K
R28
R23
4 3
2
1
TP12
C4
8.66K
1000PF
2.37K 390PF
FB
R4
DNP
DNP DNP
47PF
TP6
C83 R110
C3
1
C11
3
14
TP16
5
R10
2
"1"
U2
1
CLK_EN#
47.5K
C6
"0"
1
RTN
ISUMISUM+
VDD
VIN
IMON
BOOT
TP5
VW
COMP
R6
TP4
Q1
VCCP1.2V
AN1553.0
March 24, 2010
FIGURE 2. ISL62881CGPUEVAL2Z SCHEMATIC, 1 OF 5
TITLE:
ISL62881C GPU EVALULATION BOARD
CONTROLLER
ENGINEER:
JIA WEI
DATE:
AUGUST
PAGE:
1 OF
Application Note 1553
2N7002
390PF
1.91K
499
R19
TP13
PGOOD
D1
GRN
RED
V REF
C1
1.24
+3.3V
5
R2
DNP
-
EAD102L
R13
+
10K
P2
3
3
3 499
1 R15
5
4
100 2
ON
R21
2
1 S3
1.91K
TLV431ASNT1
U1
VR_ON R115
DNP
OFF
3 P1
DPRSLPVR
"0" S1 "1"
R5 DPRSLPVR
1
4
R1
49.9
OUT
0.01UF
+3.3V
TP7
TP1
VCCP1.2V
DPRSLPVR
ISL62881CGPUEVAL2Z Schematics
ISL62881CGPUEVAL2Z Schematics (Continued)
OUT
5
1
220UF
7MOHM
1
1
2
C52
220UF
7MOHM
C57
2
DNP
R99
DNP
0
R93
0
R87
R77
0.56UH
1.3MOHM
J12
R96
C61
DNP
C60
C59
10UF
J14
3
4 J10
1
CLOSE TO THE PROBE SOCKET
CENTERED IN THE CPU SOCKET
FIGURE 3. ISL62881CGPUEVAL2Z SCHEMATIC, 2 OF 5
DNP
C56
OUT
0.1UF
C58
->
DNP
C55
10UF
C54
DNP
22UF
C41
C40
C45
1
2
------
----------
-->
0.1UF
VSUM-
VCORE
OUT
OUT
VSUM+
22UF
PHASE1
R63
3
1
2
0
0
4 J7
R68
4
R62
R59
IRF7832
Q9
L1
DNP
3
2
1
5
4
__
PADS FOR SMALL INDUCTOR
Application Note 1553
TP33
__ PADS FOR BIG INDUCTOR
1.82K
0.22UF
IRF7832
Q3
3
2
1
C30
LGATE
6
0
IRF7821
4 OPENINGS WITH
10MIL CLEARANCE
DNP
5
5
3
2
1
IN
LGATE
R56
3
2
1
BOOT
Q8
-->
IN
4
-->
UGATE
PHASE
IRF7821
Q2
-->
IN
IN
10UF
10UF
C33
C27
C25
2
J6
----->
VIN
PGND
----->
TP32
1
J5
TP31
56UF
VIN
AN1553.0
March 24, 2010
AT17
AT20
AT35
AP34
A9
A23
A27
A29
A35
B1
B2
B4
B6
B8
B11
B13
B17
B18
B21
B25
B31
B34
C16
C19
C20
C22
C24
C28
C29
C32
C34
D3
D6
D9
D26
D30
D33
E2
E5
E8
E11
E13
E18
E21
E24
E29
E32
E35
F16
F19
F22
F25
F27
F30
G3
G6
G9
G20
G31
G34
H2
H5
H8
H11
H13
H15
H18
H28
H26
H24
H22
H32
H35
J19
J21
J30
J32
K3
K6
K9
K27
K30
K33
K34
L2
L5
L8
L29
L32
L35
M10
N6
N26
N27
N28
N29
N30
N31
N32
N33
N34
N35
P2
P4
P8
R10
T6
T26
T27
T28
T29
T30
T31
T32
T33
T34
T35
U2
U4
U8
V10
AT1
AR34
AR31
AR28
AR26
AR24
AR23
AR20
AR17
AR15
AR12
AR9
AR6
AR3
AP20
AP17
AP13
AP10
AP7
AP4
AP2
AN34
AN23
AN20
AN17
AM31
AM28
AM26
AM20
AM17
AM14
AM11
AM8
AM5
AM2
AL34
AL23
AL20
AL17
AL12
AL9
AL6
AL3
AK31
AK28
AK25
AK20
AK17
AJ23
AJ20
AJ17
AJ14
AJ11
AJ8
AJ5
AJ2
AH35
AH34
AH33
AH32
AH31
AH30
AH29
AH28
AH27
AH26
AH20
AH17
AH13
AH9
AH6
AH3
AG10
AF8
AF4
AF2
AE35
AE34
AE33
AE32
AE31
AE30
AE29
AE28
AE27
AE26
AE6
AD10
AC8
AC4
AC2
AB35
AB34
AB33
AB32
AB31
AB30
AB29
AB28
AB27
AB26
AB6
AA10
Y8
Y4
Y2
W35
W34
W33
W32
W31
W30
W29
W28
W27
W26
W6
K26
J27
J26
J25
J24
J23
J22
J20
J18
H27
H25
H21
H20
H19
G28
G27
G26
F26
E26
E25
AH14
AH12
AH11
AH10
AF10
AE10
AC10
AB10
Y10
W10
U10
T10
P10
N10
L10
K10
J14
J13
J12
J11
H14
H12
G14
G13
G12
G11
F14
F13
F12
F11
E14
E12
D14
D13
D12
D11
C14
C13
C12
C11
B14
B12
A14
A13
A12
A11
AG35
AG34
AG33
AG32
AG31
AG30
AG29
AG28
AG27
AG26
AF35
AF34
AF33
AF32
AF31
AF30
AF29
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT1
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VTT2
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
VCCDDR_DQ
DFGT_DPRSLPVR
DFGT_VR_EN
DFGT_VID0
DFGT_VID1
DFGT_VID2
DFGT_VID3
DFGT_VID4
DFGT_VID5
DFGT_VID6
DFGT_IMON
VSSAXG_SENSE
VCCAXG_SENSE
VSS_SENSE
VCC_SENSE
ISENSE_DP
VID0
VID1
VID2
VID3
VID4
VID5
VID6
DPRSLPVR
PSI_B
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
VCCAXG
AJ1
AE7
AF1
AC1
AE4
AB4
Y1
W7
W4
U1
T7
T4
P1
N7
N4
L1
H1
AB7
AT21
AT19
AT18
AT16
AR21
AR19
AR18
AR16
AP21
AP19
AP18
AP16
AN21
AN19
AN18
AN16
AM21
AM19
AM18
AM16
AL21
AL19
AL18
AL16
AK21
AK19
AK18
AK16
AJ21
AJ19
AJ18
AJ16
AH21
AH19
AH18
AH16
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
RPGA989
VCORE
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
IN
RPGA989
U4
VCCP1.2V
IN
R111
DNP
TP38
VTT1
C84
R113
DNP
DNP
C85
R112
DNP
0
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
IN
TITLE:
AN1553.0
March 24, 2010
FIGURE 4. ISL62881CGPUEVAL2Z SCHEMATIC, 3 OF 5
ISL62881C GPU EVALUATION BOARD
CPU SOCKET
ENGINEER:
JIA WEI
AC32
AC33
AC34
AC35
AD26
AD27
AD28
AD29
AD30
AD31
AD32
AD33
AD34
AD35
AF26
AF27
AF28
Y27
VCCP1.2V
Application Note 1553
U4
7
./MODELS
U33
R29
R30
R31
R32
R33
R34
V32
V33
V34
R35
U26
U27
U28
U29
U30
U34
U35
V26
V27
V28
AA28
AA29
V35
Y26
AA30
AA31
Y28
Y29
AA32
AA33
Y30
Y31
AA34
AA35
Y32
Y33
AC26
AC27
Y34
Y35
AC28
AC29
AA26
AA27
AC30
AC31
AT25
AR25
AM22
AP22
AN22
AP23
AM23
AP24
AN24
AM24
AT22
AR22
AJ35
AJ34
AN35
AK35
AK33
AK34
AL35
AL33
AM33
AM35
AM34
AN33
P26
P27
P28
P29
P30
P31
P32
V29
V30
V31
P33
P34
P35
R26
R27
R28
U31
U32
DPRSLPVR
VR_ON
VID0
VID1
VID2
VID3
VID4
VID5
VID6
IMON
VSSSENSE
VCCSENSE
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
OUT
OUT
ISL62881CGPUEVAL2Z Schematics (Continued)
TP39
VTT2
DATE:
PAGE:
AUGU
3
TP3
+12V
HB
VSS
HO
LI
HS
HI
8
7
6
5
HIP2100
R104
249
49.9K
2
Q14
499
P1
3
1
BAV99
ON
3
S2 1
P2
S4
OFF
2
2N7002
2
1
C80 1
10UF
3
R102
249
2
FIGURE 5. ISL62881CGPUEVAL2Z SCHEMATIC, 4 OF 5
1
Q15
SUD50N03_07
1
2
4 J15
Application Note 1553
R105
R103
VCORE
IN
3
4
LO
DNP
8
3
VDD
R107
2
2
1UF
U5
3
1
0.2
C79
R106
TP2
ISL62881CGPUEVAL2Z Schematics (Continued)
AN1553.0
March 24, 2010
FIGURE 6. ISL62881CGPUEVAL2Z SCHEMATIC, 5 OF 5
U4
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
A3
A4
A5
A6
A7
A8
A10
A15
A16
A17
A18
A19
A20
A21
A22
A24
A25
A26
A28
A30
A31
A32
A33
A34
B3
B5
B7
B9
B10
B15
B16
B19
B20
B22
B23
B24
B26
B27
B28
B29
B30
B32
B33
B35
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C15
C17
C18
C21
C23
C25
C26
C27
C30
C31
C33
C35
D1
D2
D4
D5
D7
D8
D10
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D27
D28
D29
D31
D32
D34
D35
E1
E3
E4
E6
E7
E9
E10
E15
E16
E17
E19
E20
E22
E23
E27
E28
E30
E31
E33
E34
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F15
F17
F18
F20
F21
F23
F24
F28
F29
F31
F32
F33
F34
F35
J16
J15
A2
Application Note 1553
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
./MODELS
RPGA989
RSVD
RSVD
Y3
Y5
Y6
Y7
Y9
AA1
AA2
AA3
AA4
AA5
AA6
AA7
AA8
AA9
AB1
AB2
AB3
AB5
AB8
AB9
AC3
AC5
AC6
AC7
AC9
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AE1
AE2
AE3
AE5
AE8
AE9
AF3
AF5
AF6
AF7
AF9
AG1
AG2
AG3
AG4
AG5
AG6
AG7
AG8
AG9
AH1
AH2
AH4
AH5
AH7
AH8
AH15
AH22
AH23
AH24
AH25
AJ3
AJ4
AJ6
AJ7
AJ9
AJ10
AJ12
AJ13
AJ15
AJ22
AJ24
AJ25
AJ26
AJ27
AJ28
AJ29
AJ30
AJ31
AJ32
AJ33
AK1
AK2
AK3
AK4
AK5
AK6
AK7
AK8
AK9
AK10
AK11
AK12
AK13
AK14
AK15
AK22
AK23
AK24
AK26
AK27
AK29
AK30
AK32
AL1
AL2
AL4
AL5
AL7
AL8
AL10
AL11
9
W9
W8
W5
W3
W2
W1
V9
V8
V7
V6
V5
V4
V3
V2
V1
U9
U7
U6
U5
U3
T9
T8
T5
T3
T2
T1
R9
R8
R7
R6
R5
R4
R3
R2
R1
P9
P7
P6
P5
P3
N9
N8
N5
N3
N2
N1
M35
M34
M33
M32
M31
M30
M29
M28
M27
M26
M9
M8
M7
M6
M5
M4
M3
M2
M1
L34
L33
L31
L30
L28
L27
L26
L9
L7
L6
L4
L3
K35
K32
K31
K29
K28
K8
K7
K5
K4
K2
K1
J35
J34
J33
J31
J29
J28
J17
J10
J9
J8
J7
J6
J5
J4
J3
J2
J1
H34
H33
H31
H30
H29
H23
H17
H16
H10
H9
H7
H6
H4
H3
G35
G33
G32
G30
G29
G25
G24
G23
G22
G21
G19
G18
G17
G16
G15
G10
G8
G7
G5
G4
G2
G1
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RPGA989
RSVD
U4
./MODELS
AP9
AP8
AP6
AP5
AP3
AP1
AN32
AN31
AN30
AN29
AN28
AN27
AN26
AN25
AN15
AN14
AN13
AN12
AN11
AN10
AN9
AN8
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AM32
AM30
AM29
AM27
AM25
AM15
AM13
AM12
AM10
AM9
AM7
AM6
AM4
AM3
AM1
AL32
AL31
AL30
AL29
AL28
AL27
AL26
AL25
AL24
AL22
AL15
AL14
AL13
AT7
AT34
AT33
AT32
AT31
AT30
AT29
AT28
AT27
AT26
AT24
AT23
AT15
AT14
AT13
AT12
AT11
AT10
AT9
AT8
AT6
AT5
AT4
AT3
AT2
AR35
AR33
AR32
AR30
AR29
AR27
AR14
AR13
AR11
AR10
AR8
AR7
AR5
AR4
AR2
AR1
AP35
AP33
AP32
AP31
AP30
AP29
AP28
AP27
AP26
AP25
AP15
AP14
AP12
AP11
ISL62881CGPUEVAL2Z Schematics (Continued)
AN1553.0
March 24, 2010
Application Note 1553
ISL62881CGPUEVAL2Z Evaluation Board Layout
FIGURE 7. TOP SILKSCREEN
10
AN1553.0
March 24, 2010
Application Note 1553
ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 8. BOTTOM SILKSCREEN
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 9. LAYER 1
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 10. LAYER 2
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 11. LAYER 3
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 12. LAYER 4
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 13. LAYER 5
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 14. LAYER 6
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 15. LAYER 7
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ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)
FIGURE 16. LAYER 8
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the
reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
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