USER’S MANUAL

ISL62881CGPUEVAL2Z AN1553 Evaluation Board Rev 0.00 Mar 24, 2010

Hardware Description Interface Connections The ISL62881CGPUEVAL2Z evaluation board •VIN: Input Voltage to the Power Stage demonstrates the performance of the ISL62881C -J5: VIN Positive Power Input single-phase synchronous-buck PWM GPU VCORE - TP31: V Positive Voltage Sense controller implementing Intel IMVP-6.5 protocol. The IN -J6: V Return Power Input ISL62881C features Intersil's Robust Ripple Regulator IN (R3™) technology. An on-board dynamic-load generator - TP32: VIN Return Voltage Sense is included for evaluating the transient-load response. It •VO: Regulated Output Voltage applies a 300µs pulse of approximately 0.2 load across -J12: VO Positive Power Output VO and PGND. -J14: VO Return Power Output Contents of this document include: •+5V: +5V Input Voltage • Design Criteria - TP29: +5V Positive Input • Recommended Test Equipment - TP30: +5V Return Input • Interface Connections • +12V: Input Voltage for the Dynamic-load Generator • Switch Descriptions - TP3: 12V Positive Input • DIP Switch Descriptions - TP2: 12V Return Input • Jumper Descriptions • Test Point Descriptions Test Set-Up

• Evaluation Board Documentation TP18 TP14 on S3 - Bill of materials RTN VSEN off 1 DPRSLPVR -Schematic _ J6 D1 S1 U2 PGND 0 1 0 VID0 - Silk-screen plots VID1 Vin VID2 VID3 -Board layer plots J5 VID4 + VIN VID5 VID6 TABLE 1. DC/DC DESIGN CRITERIA TP37 J16 +3.3V PARAMETER VALUE UNITS TP29 +5V + TP30 _5V VIN 4.5 to 20 VDC PGND

VO 0 to 1.5 VDC ISL62881CGPUEVAL2Z Full-load 26 ADC TP3 J12 TP2 VCORE PWM Frequency 300 kHz on J14 S2 PGND off

Recommended Equipment J10 VCORE • (Qty. 1) Adjustable 25V, 10A Power Supply • (Qty. 1) Fixed 5V, 100mA Power Supply FIGURE 1. TEST SET-UP • (Qty. 1) Fixed 12V, 100mA Power Supply • (Qty. 1) Adjustable Constant Current Electronic Load Switch Descriptions • (Qty. 1) Digital Voltmeter •S3: Enable • (Qty. 1) Four-Channel Oscilloscope - OFF: Short the VR_ON pin to GND (disable PWM) - ON: Allow the VR_ON pin to pull-up to +5V (enable PWM) •S2: Dynamic Load - OFF: On-board dynamic load disabled - ON: On-board dynamic load enabled

AN1553 Rev 0.00 Page 1 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

DIP-Switch Descriptions Test Point Descriptions (Continued) • S1: Set the control signals TEST POINT DESCRIPTION - S1.1: Set the DPRSLPVR signal TP12 Input side of the compensator. - S1.2: Set the DPRSTP# signal TP13 Monitor the PGOOD pin. • U2: Set the VID TP14 Monitor the VSEN pin. Jumper Descriptions TP16 Monitor the CLK_EN# pin. • J16: If installed, the +5V rail supplies the +3.3V rail TP17 Monitor the VR_ON pin. to the auxiliary circuit on the board. DO NOT APPLY +3.3V TO TP37/TP30 WHILE J16 IS TP18 Monitor the RTN pin. INSTALLED! IT’LL SHORT THE +5V AND THE TP19 Monitor the positive side of C82. +3.3V POWER SUPPLIES. When measuring board efficiency, uninstall J16 and apply +3.3V to TP20 Monitor the negative side of C82. TP37/TP30. TP21 Monitor the VID6 pin. Test Point Descriptions TP22 Monitor the VID5 pin. TP23 Monitor the VID4 pin. TEST POINT DESCRIPTION TP24 Monitor the VID3 pin. J7 Scope-probe socket for measuring PHASE1. TP25 Monitor the VID2 pin.

J10 Scope-probe socket for measuring VO. TP26 Monitor the VID1 pin. J15 Scope-probe socket for measuring the TP27 Monitor the VID0 pin. current of the on-board transient-load emulator. TP28 Monitor the IMON pin. TP29 TP1 Monitor the on-board 1.2V power supply. +5V power supply positive input. TP2 +12V power supply return input. TP30 +5V power supply return input. TP31 TP3 +12V power supply positive input. VIN positive voltage sense. TP32 TP4 Monitor the COMP pin. VIN return voltage sense. TP5 Monitor the VW pin. TP33 Monitor MOSFET Q3 gate signal. TP37 TP6 Monitor the FB pin. +3.3V power supply positive input. TP7 Monitor the DPRSLPVR pin.

Bill of Materials

QTY REFERENCE VALUE DESCRIPTION MFG. PART NUMBER PACKAGE 1 PCB ISL62881GPUEVAL2ZREVB 1 C1 0.01µF Multilayer Cap, 16V, 10% GENERIC H1045-00103-16V10 SM0603 1 C11 390pF Multilayer Cap, 16V, 10% GENERIC H1045-00391-16V10 SM0603 1 C12 330pF Multilayer Cap, 16V, 10% GENERIC H1045-00331-16V10 SM0603 1 C13 1000pF Multilayer Cap, 16V, 10% GENERIC H1045-00102-16V10 SM0603 0 C14, C15, C19, C39, DNP C44, C42, C43, C47- C50, C53, C62-C78, C81, C86 5 C16, C2, C22, C23, 1µF Multilayer Cap, 16V, 20% GENERIC H1045-00105-16V20 SM0603 C79 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

AN1553 Rev 0.00 Page 2 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

Bill of Materials (Continued)

QTY REFERENCE VALUE DESCRIPTION MFG. PART NUMBER PACKAGE 1 C25 56µF Radial Cap, 25V, 20% SANYO 25SP56M CASE-CC 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, 7M PANASONIC EEXSX0D221E7 1 C4 1000pF Multilayer Cap, 16V, 10% GENERIC H1045-00102-16V10 SM0603 2 C40, C41 22µF Multilayer Cap, 6.3V, 20% TAIYO JMK212BJ226MG-T SM0805 MURATA GRM21BC80J226M Kyocera CM21X5R226M04AT TDK C2012X5R0J226MT009N 2 C55, C60 10µF Multilayer Cap, 6.3V, 20% TAIYO JMK212BJ106MG-T SM0805 MURATA GRM21BR60J106ME19 Kyocera CM21X5R106M06AT TDK C2012X5R0J106MT009N 1 C6 47pF Multilayer Cap, 16V, 10% GENERIC H1045-00470-16V10 SM0603 1 C82 0.033µF Multilayer Cap, 16V, 10% GENERIC H1045-00333-16V10 SM0603 1 D1 3mmx2.5mm Surface Mount Lumex SSL-LXA3025IGC LED_3x2_5MM Red/Green LED 1 J10 Scope Probe Test POint PCB TEKTRONIX 131-4353-00 TEK131-4353-00 Mount 0 J15, J7 DNP 2 J12, J14 Wire Connector Lug BURNDY KPA8CTP KPA8CTP 1 J16 2 Pin Header 2.54mm BERG?FCI 69190-202 CONN2 (0.100) Pitch 1 J5 Binding Post Red JOHNSON- 111-0702-001 111-07XX-001 COMP 1 J6 Binding Post Black JOHNSON- 111-0703-001 111-07XX-001 COMP 1 L1 0.56µH Inductor, Inductance 20%, PANASONIC ETQP4LR56AFC 10mm x 10mm DCR 7% 2 Q1, Q14 N-Channel EMF Effect FAIRCHILD 2N7002-7-F SOT23 Transistor (Pb-Free) 1 Q15 N-Channel 30V (D-S) VISHAY SUD50N03-07 TO-252AA MOSFET 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, DNP R113, R114, R121, R2, R26, R4, R44, R62, R68, R77, R87, R93, R99, R107 1 R11 3.48k Thick Film Chip Resistor, 1% GENERIC H2511-03481-1/16W1 SM0603

AN1553 Rev 0.00 Page 3 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

Bill of Materials (Continued)

QTY REFERENCE VALUE DESCRIPTION MFG. PART NUMBER PACKAGE 3 R13, R15, R103 499 Thick Film Chip Resistor, 1% GENERIC H2511-04990-1/16W1 SM0603 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, 0 Thick Film Chip Resistor, 1% GENERIC H2511-00R00-1/16W1 SM0603 R27, R29, R32, R33, R34, R35, R40, R52, R56, R62, R87, R112 9 R21, R28, R36, R39, 10k Thick Film Chip Resistor, 1% GENERIC H2511-01002-1/16W1 SM0603 R43, R45, R46, R49, R51 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 H2511-02611-1/16W1 SM0603 1 R42 10k NTC Thermistor, 10k NTC PANASONIC ERT-J1VR103J SM0603 2 R5, R80 100 Thick Film Chip Resistor, 1% GENERIC H2511-01000-1/16W1 SM0603 1 R50 7.15k Thick Film Chip Resistor, 1% GENERIC H2511-07151-1/16W1 SM0603 2 R59, R96 0 Solder Joint (Heavy Duty) 1 R6 8.66k Thick Film Chip Resistor, 1% GENERIC H2511-08661-1/16W1 SM0603 1 R63 1.82k Thick Film Chip Resistor, 1% GENERIC H2511-01821-1/16W1 SM0805 1 R7 261k Thick Film Chip Resistor, 1% GENERIC H2511-02613-1/16W1 SM0603 1 S1 SD Series Low Profile Dip C&K SD02H0SK DIPSWSMT-4 Switch 2 S2, S3 SPDT On-None-On SMT C&K GT11MSCKE GT13MSCKE Ultraminiature Toggle Switch 1 S4 Schottky Barrier (Double) DIODES BAT54S SOT23 Diode 4 TP2, TP3, TP29, Test Point Turret 0.15 Pad KEYSTONE 1514-2 TP-150C100P TP30 0.1 Thole 28 TP1, TP4-TP7, Miniature White Test Point KEYSTONE 5002 MTP500X TP12-TP14, 0.100 Pad 0.040 Thole TP16-TP28, TP31-TP33, TP37, TP40 0TP38, TP39DNP 1 U1 Low Volt Precision ON-SEMI TLV431ASNT1 TSOP-5 Adjustable Shunt Regulator 1 U2 SD Series Low Profile Dip C&K SD07H0SK DIPSWSMT-14 Switch 1 U4 rPGA989 CPU Socket FOXCONN 1 U5 100V/2A Peak High INTERSIL HIP2100IBZ SOIC8_150_50 Frequency Half Bridge Driver (Pb-Free) 1 U6 IMVP-6.5 PWM Controller INTERSIL ISL62881CHRTZ QFN-28

AN1553 Rev 0.00 Page 4 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z 1OF AUGUST

DATE: PAGE: 100

VID0 VID1 VID2 VID3 VID4 VID5 VID6 R80 TP37 3.3V TP29 5V TP30 PGND 14 13 12 11 10 9 8 JIA WEI CONTROLLER 9 8 "1" 14 13 12 11 10

VCCP1.2V

1UF 1UF

+3.3V +5V

2

U2 1 2 1

C2 C23 J16 MST7_SPST ISL62881C GPU EVALULATION BOARD 1 2 3 4 5 6 7 0

R52

"0"

1 2 3 4 5 6 7 VID0 10K

ENGINEER:

TP27 TITLE:

R51

VID1 10K

TP26 ROUTE UGATEGOING TRACE TO INROUTE THE PARALLEL LGATE SOURCE WITHGOING TRACE OF THE TO IN Q1 PHASE1 THE PARALLEL AND SOURCE TRACE Q2. WITH OF THE Q3 VSSP AND TRACE Q4.

VSUM+ VSUM- R49

VID2 10K IN IN

TP25

0.1UF

R46 NOTE:

VSSSENSE

VID3 10K TP28 IMON C20 TP24

IN R45

DNP VID4 10K

1UF 0.047UF TP23

R43 R44

C22 C21

NTC VID5 10K

7.15K 2.61K 10K TP22

R39

----->

R50

OUT OUT OUT OUT R41 R42

VID6 10K

11K TP21

PLACE NEAR L1

R36

0

BOOT +5V VIN R38

IN

VSUM+ VSUM-

VID0 LGATE PHASE UGATE

DNP 0

R34

TP19 TP20 IN IN IN

VID1

0 19 18 17 16 15 C19 R33 21 20

0.27UF R35

0

R40 C18

0 VID1 VID0 VCCP VSSP

0.033UF VID2 BOOT

IN PHASE UGATE LGATE

VID2 22 14

0.22UF

0

R32 1

IMON VID3

IN

C82 VID3 13 23 R37

0

R29 C17

VIN VID4

IN

VID4

12 24

1UF

0 DNP

R27 R109

DNP DNP VDD VID5 R30

IN

VID5 25 11

0 1.07K

U6

R25 C16

ISUM+ VID6

IN

R26 C15 VID6

26 10 C81

DNP R24

ISUM- VR_ON ISL62881C

TP17

27 9 VR_ON

RTN DPRSLPVR

8 28 DNP

DPRSLPVR EP DNP R114 10K R21

R115

0 10K CLK_EN# PGOOD RBIAS VW COMP FB VSEN

FIGURE 2. 1 OF 5 SCHEMATIC, ISL62881CGPUEVAL2Z 2 R20 1.91K TP16

CLK_EN#

R28 1 2 3 4 5 6 7

29 RTN R23

P1 P2 DNP

VR_ON

S3

TP18

1 VSEN 3

OFF ON C14

1.91K TP13 TP14

PGOOD DPRSLPVR

R19 R16

47.5K TP7 0 499

R22 C13

C12

330PF

4 3

TP12

R15 1

1 2 "1" RED

1000PF

499

3 3 24 GRN

+3.3V

S1 R13 Q1 D1 EAD102L C11 2N7002 OUT "0" 390PF 10 10 IN IN 1 2 DPRSLPVR R17 R18 R11 3.48K

R5

100 FB R10 0.01UF 2.37K IN

VCCP1.2V 3 C1 TP6 VSSSENSE VCCSENSE

R7

1000PF

VW 261K VCORE

TP5 C6

TP1 47PF C4

5

U1 + - REF 8.66K C3 V

1.24

390PF

TLV431ASNT1 R6

COMP DNP DNP

4 TP4

R2 R4

DNP DNP

R1

49.9 R110 C83 +3.3V ISL62881CGPUEVAL2Z Schematics

AN1553 Rev 0.00 Page 5 of 20 Mar 24, 2010

ISL62881CGPUEVAL2Z

DNP

1 C61 1

J12 J14

10UF

C60

DNP

C59 DNP

J10

C56 4

3

10UF OUT

1 0.1UF 2

C55

DNP C58

->

C54 ------

VCORE

7MOHM CLOSE TO THE PROBE SOCKET 220UF 22UF

1 2

C57

C41

7MOHM

0.1UF 220UF 22UF

1 2

C52 C40 C45

------>

CENTERED IN THE CPU SOCKET

DNP R99

0

R96 DNP

R93 0

OUT

-----> R87 __ VSUM-

DNP --> R77

L1

0.56UH DNP

1.3MOHM --> R68

PADS FOR BIG INDUCTOR 1.82K PADS FOR SMALL INDUCTOR 0

__ OUT (Continued) R62 -----> R63 VSUM+

--> 0 J7

R59 PHASE1 4 3 1 2 FIGURE 3. 2 OF 5 SCHEMATIC, ISL62881CGPUEVAL2Z 10MIL CLEARANCE OPENINGS WITH 4 4

IRF7821 IRF7832 5 1 1 5

2 2

3 Q8 Q9 3 4 4

IRF7821 IRF7832 5 1 5 1

2 2

3

Q2 Q3 3

10UF

C33

LGATE

10UF C30 TP33

0.22UF C27 56UF

0

2 1 R56 C25 UGATE PHASE BOOT LGATE IN IN IN IN VIN PGND OUT J5 J6 VIN TP31 TP32 ISL62881CGPUEVAL2Z Schematics

AN1553 Rev 0.00 Page 6 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z 3 AUGU DATE: PAGE:

AC32 AC33 AC34 AC35 AD26 AD27 AD28 AD29 AD30 AD31 AD32 AD33 AD34 AD35 AF26 AF27 AF28 Y27

VSS VSS

W6 V10

VSS VSS

VCC

U8 W26

VSS VSS

AC31

VCC

W27 U4

VSS VSS

AC30 VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC

VCC

U2 W28

VSS VSS

AA27

VCC VCC W29 T35

VSS VSS

AA26 AF29

T34 VCC VCC W30

VSS VSS

AC29 AF30

VCC VCC

T33 W31

VSS VSS

AC28 AF31

VCC VCC

T32 W32

VSS VSS

Y35 AF32

VCC VCC

T31 W33

VSS VSS

Y34 AF33

VCC VCC

T30 W34

VSS VSS

AC27 AF34

VCC VCC

T29 W35

VSS VSS

AC26 AF35

VCC VCC

T28 Y2

VSS VSS

Y33 AG26

VCC T27 Y4 VCC

VSS VSS

Y32 AG27

VCC VCC Y8 T26

VSS VSS

AA35 AG28

T6 AA10 VCC VCC

VSS VSS

AA34 AG29

VCC VCC

R10 AB6

VSS VSS

Y31 AG30

VCC VCC

P8 AB26

VSS VSS

AG31 Y30

VCC VCC

P4 JIA WEI AB27

VSS VSS

AA33 AG32

VCC VCC

AB28 P2 CPU SOCKET

VSS VSS

AA32 AG33

VCC VCC

AB29 N35

VSS VSS

Y29 AG34

VCC VCC AB30 N34

VSS VSS

Y28 AG35

AB31 N33 VCC

VSS VSS

AA31

VTT2 VCC

AB32 N32

VSS VSS

AA30 A11

VTT2 VCC

AB33 N31

VSS VSS

Y26 A12

VTT2 VCC

N30 AB34

VSS VSS

V35 A13

VTT2 VCC

N29 AB35

VSS VSS

AA29 A14

VTT2 VCC N28 AC2

VSS VSS

AA28

B12 ISL62881C GPU EVALUATION BOARD

VTT2 VCC

N27 AC4

VSS VSS

V28 B14

VTT2 N26 VCC AC8

VSS VSS

V27 C11

VTT2 VCC

N6 AD10

VSS VSS

V26 C12

VTT2 M10 VCC AE6

VSS VSS

U35 C13

VTT2 VCC L35 AE26

VSS

VSS ENGINEER:

U34

C14 TITLE:

VTT2 VCC

L32 AE27

VSS VSS

U30 D11

VTT2 VCC

L29 AE28

VSS VSS

D12 U29

VTT2 VCC

L8 AE29

VSS VSS

U28 D13

VTT2 VCC

L5 AE30

VSS VSS

U27 D14

VTT2 VCC AE31 L2

VSS VSS

E12 U26

K34 VTT2 VCC AE32

VSS VSS

R35 E14

VTT2 VCC

AE33 K33

VSS VSS

V34 F11

VTT2 VCC

AE34 K30

VSS VSS

V33 F12

VTT2 VCC

AE35 K27

VSS VSS

V32 F13

VTT2 VCC

K9 AF2

VSS VSS

R34 F14

VTT2 VCC

K6 AF4

VSS VSS

R33 G11

VTT2 VCC

K3 AF8

VSS VSS

R32 G12

VTT2 AG10 VCC J32

VSS VSS

R31 G13

VTT2 VCC

AH3 J30

VSS VSS

R30 G14

VCC VTT2 J21 AH6

VSS VSS

R29 H12

VCC VTT2

AH9 J19

VSS VSS

U33 H14

VCC VTT2

AH13 H35

VSS VSS

J11

VTT2 VCC

AH17 H32

VSS VSS

J12

VTT2 VCC

AH20

VCCP1.2V H22 VSS VSS

J13

VTT2 VCC

AH26 H24

VSS VSS

J14

VTT2 VCC

AH27

IN H26 VSS VSS

K10

VTT2 AH28 VCC H28

VSS VSS

L10

VTT2 VCC

H18 AH29

VSS VSS

N10

VTT2 VCC

H15 TP39 VTT2 AH30

VSS VSS

P10

VTT2 VCC AH31 H13

VSS VSS

T10 0

VTT2 VCC

H11 AH32

VSS VSS

U10

VTT2 VCC

H8 AH33

VSS VSS

W10

VTT2 VCC H5 AH34

VSS VSS

U4 Y10

H2 VTT2 AH35 VCC

VSS VSS

AB10

VTT2 VCC G34 AJ2

VSS VSS

AC10

AJ5 G31 VTT2 VCC

VSS VSS

RPGA989 AE10

VTT2 VCC

G20 AJ8

VSS VSS

AF10

VTT2 VCC

G9 AJ11

VSS VSS

AH10 DNP

VTT2 VCC

G6 AJ14

VSS VSS

AH11

VTT2 VCC

AJ17 G3

VSS VSS

U32 AH12

VTT2 VCC

AJ20 F30

VSS VSS

U31 AH14

VCC

AJ23 F27

VSS VSS

R28

VTT1 AK17 F25 VCC

VSS VSS

E25 R27 DNP

VTT1 VCC

AK20

R113 F22 VSS VSS

E26 R26

VTT1 VCC

F19 AK25

VSS VSS

F26 P35

VTT1 VCC

F16 AK28

VSS VSS

G26 P34

VTT1 VCC

E35 AK31

VSS VSS

P33 G27

VTT1 VCC E32 AL3

VSS VSS

V31 G28 DNP

C84 C85

VCC VTT1 E29 AL6

VSS VSS

H19 V30

VTT1 E24 AL9 VCC

VSS VSS

H20 V29

VCC VTT1 E21

(Continued) AL12 VSS VSS

P32 H21

E18 AL17 VTT1 VCC

VSS VSS

P31 H25

VTT1 VCC

E13 AL20

VSS VSS

P30 H27

VTT1 VCC

E11 AL23

VSS VSS

P29 J18

VTT1 VCC

E8 AL34

VSS VSS

P28 J20

VTT1 VCC

E5 DNP AM2

R111 R112

VSS VSS

P27 J22

VCC VTT1

E2 AM5

VSS VSS

P26 J23

VTT1 D33 AM8

VSS VSS

J24

PSI_B AM11 D30 VTT1

VSS VSS

J25 AN33

DPRSLPVR VTT1

D26

AM14 FIGURE 4. 3 OF 5 SCHEMATIC, ISL62881CGPUEVAL2Z

VSS

TP38 VSS

AM34 J26 VTT1

VTT1

D9

IN AM17 VSS VSS

J27

VID6 VTT1

AM20 D6

VSS VSS

K26 AM35

VID5

AM26 D3

VSS VSS

AM33

VID4

AM28 C34

VSS VSS

VCCDDR_DQ

AL33

VID3

H1 AM31 C32

VSS VSS

VCCDDR_DQ

AL35

VID2 L1 C29 AN17

VSS VSS

VCCDDR_DQ

AK34

VID1

C28 N4 AN20

VSS VSS

VCCDDR_DQ

AK33

AN23 VID0 C24 N7

VSS VSS

VCCDDR_DQ AK35

P1 C22

VCCP1.2V AN34 VSS VSS

VCCDDR_DQ

ISENSE_DP

C20 T4 AP2

VSS VSS

AN35 VCCDDR_DQ

VCC_SENSE

C19 T7 AP4

VSS VSS

VCCDDR_DQ

AJ34

VSS_SENSE

U1 C16 AP7

VSS VSS

VCCDDR_DQ

AJ35

W4 B34 AP10

VSS VSS

VCCDDR_DQ

OUT VCCAXG_SENSE

W7 B31 AP13

VSS VSS

VCCDDR_DQ

AR22 VCCSENSE

OUT Y1 B25 VSSAXG_SENSE AP17

VSS VSS

VCCDDR_DQ AT22 VSSSENSE

AB4 B21 AP20

VSS VSS

VCCDDR_DQ DFGT_IMON

IN

AM24 AE4 B18 IMON AR3

VSS VSS

VCCDDR_DQ

OUT DFGT_VID6

AC1 AR6 B17

VSS VSS

VCCDDR_DQ

VID6 AN24

OUT DFGT_VID5

AF1 AR9 B13

VSS VSS

AP24 VID5 VCCDDR_DQ

OUT DFGT_VID4

AE7 B11 AR12

VSS VSS

VCCDDR_DQ

AM23 VID4

OUT DFGT_VID3 B8 AJ1 AR15

VSS VSS

AP23 VID3

OUT DFGT_VID2 B6 AR17

VSS VSS

AN22 VID2

DFGT_VID1 OUT

B4 AR20

VSS VSS

VCCDDR_DQ

VID1 AP22

OUT DFGT_VID0 AB7 B2 AR23

VSS VSS

AM22 VID0

B1 AR24

VSS VSS

OUT DFGT_VR_EN

AR25 VR_ON A35 AR26

VSS VSS

OUT DFGT_DPRSLPVR

DPRSLPVR AT25 AR28 A29

VSS VSS

AR31 A27

VSS VSS

AR34 A23

VSS VSS

AT1 A9 VSS

AP34 VSS

AT35

VSS

AT20

VSS

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 AT17

RPGA989

./MODELS 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 U4 VCORE IN ISL62881CGPUEVAL2Z Schematics

AN1553 Rev 0.00 Page 7 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

J15

4 3

1 2

DNP

R107

SUD50N03_07 0.2

Q15

2 3 VCORE R106 1 IN 3 S4 BAV99 1 2 249 249 R104 R105 OFF ON 1 3 P1 P2 S2

2

(Continued)

10UF

1 2 8 7 6 5 C80 FIGURE 5. 4 OF 5 SCHEMATIC, ISL62881CGPUEVAL2Z LO LI HI VSS U5 499 HIP2100 R103 VDD HB HO HS

1 2 3 4

TP3 +12V 49.9K

2N7002 Q14 3 2 R102 1

1UF C79 TP2 ISL62881CGPUEVAL2Z Schematics

AN1553 Rev 0.00 Page 8 of 20 Mar 24, 2010

ISL62881CGPUEVAL2Z

RSVD

G1 RSVD

G2

RSVD

G4

RSVD RSVD

G5 A2

RSVD RSVD

G7 J15

RSVD RSVD

G8 J16

RSVD RSVD

G10 F35

RSVD RSVD

G15 F34

RSVD RSVD

G16 F33

RSVD RSVD

F32 G17

RSVD RSVD

F31 G18

RSVD RSVD RSVD RSVD

F29 AL11 G19 AL13

RSVD RSVD RSVD RSVD

F28 AL14 G21 AL10

RSVD RSVD RSVD RSVD

F24 AL8 G22 AL15

RSVD RSVD RSVD RSVD

AL7 F23 G23 AL22

RSVD RSVD RSVD RSVD

AL5 AL24 F21 G24

RSVD RSVD RSVD RSVD

AL4 F20 G25 AL25

RSVD RSVD RSVD RSVD

G29 AL26 AL2 F18

RSVD RSVD RSVD RSVD

G30 AL27 AL1 F17

RSVD RSVD RSVD RSVD

G32 AL28 AK32 F15

RSVD RSVD RSVD RSVD

G33 AL29 F10 AK30

RSVD RSVD RSVD RSVD

G35 AL30 F9 AK29

RSVD RSVD RSVD RSVD

AK27 AL31 F8 H3

RSVD RSVD RSVD RSVD

AK26 F7 H4 AL32

RSVD RSVD RSVD RSVD

AK24 AM1 H6 F6

RSVD RSVD RSVD RSVD

AM3 AK23 F5 H7

RSVD RSVD RSVD RSVD

AM4 AK22 F4 H9

RSVD RSVD RSVD RSVD

AM6 AK15 H10 F3

RSVD RSVD RSVD RSVD

AM7 AK14 F2 H16

RSVD RSVD RSVD RSVD

AM9 AK13 F1 H17

RSVD RSVD RSVD RSVD

AM10 E34 H23 AK12

RSVD RSVD RSVD RSVD

AM12 AK11 H29 E33

RSVD RSVD RSVD RSVD

AK10 E31 H30 AM13

RSVD RSVD RSVD RSVD

E30 H31 AM15 AK9

RSVD RSVD RSVD RSVD

E28 AM25 H33 AK8

RSVD RSVD RSVD RSVD

E27 AK7 AM27 H34

RSVD RSVD RSVD RSVD

E23 J1 AM29 AK6

RSVD RSVD RSVD RSVD

E22 AM30 J2 AK5

RSVD RSVD RSVD RSVD

E20 J3 AM32 AK4

RSVD RSVD RSVD RSVD

E19 J4 AK3 AN1

RSVD RSVD RSVD RSVD

E17 J5 AK2 AN2

RSVD RSVD RSVD RSVD

E16 J6 AK1 AN3

RSVD RSVD RSVD RSVD

J7 E15 AJ33 AN4

RSVD RSVD RSVD RSVD

E10 J8 AJ32 AN5

RSVD RSVD RSVD RSVD

AJ31 E9 J9 AN6

RSVD RSVD RSVD RSVD

J10 E7 AN7 AJ30

RSVD RSVD RSVD RSVD

J17 E6 AN8 AJ29

RSVD RSVD RSVD RSVD

J28 E4 AN9 AJ28

RSVD RSVD RSVD RSVD

J29 AN10 E3 AJ27

RSVD RSVD RSVD RSVD

AN11 E1 J31 AJ26

RSVD RSVD RSVD RSVD

D35 J33 AN12 AJ25

RSVD RSVD RSVD RSVD

J34 D34 AN13 AJ24

RSVD RSVD RSVD RSVD

AJ22 J35 D32 AN14

RSVD RSVD RSVD RSVD

AJ15 D31 K1 AN15

RSVD RSVD RSVD RSVD

AJ13 D29 K2 AN25

RSVD RSVD RSVD RSVD

AJ12 K4 D28 AN26

RSVD RSVD RSVD RSVD

D27 K5 AN27 AJ10

RSVD RSVD RSVD RSVD

AN28 K7 D25 AJ9

RSVD RSVD RSVD RSVD

D24 K8 AN29 AJ7

RSVD RSVD RSVD RSVD

AN30 K28 D23 AJ6

RSVD RSVD RSVD RSVD

D22 AN31 K29 AJ4

RSVD RSVD RSVD RSVD

AN32 D21 K31 AJ3

RSVD RSVD RSVD RSVD

AP1 D20 K32 AH25

RSVD RSVD RSVD RSVD

AP3 D19 K35 AH24

RSVD RSVD RSVD RSVD

AP5 L3 D18 AH23

RSVD RSVD RSVD RSVD

AP6 AH22 D17 L4

RSVD RSVD RSVD RSVD

AP8 AH15 D16 L6

RSVD RSVD RSVD RSVD

AP9 D15 L7 AH8

RSVD RSVD RSVD

D10 L9 AH7

RSVD RSVD RSVD

L26 D8 AH5

RSVD RSVD RSVD

D7 AH4 L27

RSVD RSVD RSVD

AH2 D5 L28

RSVD RSVD RSVD RSVD

AP11 AH1 L30 D4

RSVD RSVD RSVD RSVD

D2 L31 AP12 AG9

RSVD RSVD RSVD RSVD

D1 L33 AP14 AG8

RSVD RSVD RSVD RSVD

L34 AP15 AG7 C35

RSVD RSVD RSVD RSVD

C33 M1 AP25 AG6

RSVD RSVD RSVD RSVD

C31 AP26 M2 AG5

RSVD RSVD RSVD RSVD

C30 AP27 M3 AG4

RSVD RSVD RSVD RSVD

AG3 AP28 M4 C27

RSVD RSVD RSVD RSVD

AP29 AG2 M5 C26

RSVD RSVD RSVD RSVD

C25 AP30 AG1 M6

RSVD RSVD RSVD RSVD

AF9 M7 AP31 C23

RSVD RSVD RSVD RSVD

AP32 M8 C21 AF7

RSVD RSVD RSVD RSVD

AP33 M9 AF6 C18

RSVD RSVD

(Continued) RSVD

C17 M26 AF5

RSVD RSVD RSVD RSVD

AP35 AF3 M27 C15

RSVD RSVD RSVD RSVD

AE9 AR1 C10 M28

RSVD RSVD RSVD RSVD

AE8 AR2 C9 M29

RSVD RSVD RSVD RSVD

AE5 AR4 M30 C8

RSVD RSVD RSVD RSVD

AR5 AE3 C7 M31

RSVD RSVD RSVD RSVD

AR7 AE2 M32 C6

RSVD RSVD RSVD RSVD

AR8 M33 AE1 C5

RSVD RSVD RSVD RSVD

AR10 M34 C4 AD9

RSVD RSVD RSVD

RSVD FIGURE 6. 5 OF SCHEMATIC, ISL62881CGPUEVAL2Z

M35 C3 AR11 AD8

RSVD RSVD RSVD RSVD

AR13 N1 C2 AD7

RSVD RSVD RSVD RSVD

AR14 C1 AD6 N2

RSVD RSVD RSVD RSVD

AR27 N3 AD5 B35

RSVD RSVD RSVD RSVD

AR29 N5 B33 AD4

RSVD RSVD RSVD RSVD

AR30 AD3 N8 B32

RSVD RSVD RSVD RSVD

AR32 AD2 N9 B30

RSVD RSVD RSVD RSVD

AR33 AD1 P3 B29

RSVD RSVD RSVD RSVD

AR35 P5 AC9 B28

RSVD RSVD RSVD RSVD

AT2 P6 AC7 B27

RSVD RSVD RSVD RSVD

AT3 B26 P7 AC6

RSVD RSVD RSVD RSVD

AT4 P9 AC5 B24

RSVD RSVD RSVD RSVD

AT5 R1 AC3 B23

RSVD RSVD RSVD RSVD

AT6 B22 R2 AB9

RSVD RSVD RSVD RSVD

R3 AT8 AB8 B20

RSVD RSVD RSVD RSVD

R4 AT9 B19 AB5

RSVD RSVD RSVD RSVD

AT10 R5 AB3 B16

RSVD RSVD RSVD RSVD

R6 AT11 AB2 B15

RSVD RSVD RSVD RSVD

R7 AT12 AB1 B10

RSVD RSVD RSVD RSVD

R8 AT13 B9 AA9

RSVD RSVD RSVD RSVD

AT14 B7 AA8 R9

RSVD RSVD RSVD RSVD

AT15 B5 T1 AA7

RSVD RSVD RSVD RSVD

AT23 B3 AA6 T2

RSVD RSVD RSVD RSVD

T3 AT24 AA5 A34

RSVD RSVD RSVD RSVD

T5 AT26 AA4 A33

RSVD RSVD RSVD RSVD

T8 AT27 AA3 A32

RSVD RSVD RSVD RSVD

T9 AT28 AA2 A31

RSVD RSVD RSVD RSVD

U3 AT29 A30 AA1

RSVD RSVD RSVD RSVD

U5 AT30 Y9 A28

RSVD RSVD RSVD RSVD

U6 AT31 Y7 A26

RSVD RSVD RSVD RSVD

U7 A25 AT32 Y6

RSVD RSVD RSVD RSVD

A24 U9 AT33 Y5

RSVD RSVD RSVD RSVD

AT34 Y3 V1 A22

RSVD RSVD RSVD

V2 AT7 A21

RPGA989 RSVD RSVD

V3 A20

RSVD RSVD

V4 A19

RSVD RSVD

V5 A18

RSVD RSVD

V6 A17

RSVD RSVD

U4

V7 A16

RSVD RSVD

V8 A15

RSVD RSVD

A10 V9

RSVD RSVD

A8 W1

RSVD ./MODELS RSVD

A7 W2

RSVD RSVD

U4 A6 W3

RSVD RSVD

A5 W5

RSVD RSVD

A4 W8

RSVD RSVD

A3 W9 RPGA989 ./MODELS ISL62881CGPUEVAL2Z Schematics

AN1553 Rev 0.00 Page 9 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout

FIGURE 7. TOP SILKSCREEN

AN1553 Rev 0.00 Page 10 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 8. BOTTOM SILKSCREEN

AN1553 Rev 0.00 Page 11 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 9. LAYER 1

AN1553 Rev 0.00 Page 12 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 10. LAYER 2

AN1553 Rev 0.00 Page 13 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 11. LAYER 3

AN1553 Rev 0.00 Page 14 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 12. LAYER 4

AN1553 Rev 0.00 Page 15 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 13. LAYER 5

AN1553 Rev 0.00 Page 16 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 14. LAYER 6

AN1553 Rev 0.00 Page 17 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 15. LAYER 7

AN1553 Rev 0.00 Page 18 of 20 Mar 24, 2010 ISL62881CGPUEVAL2Z

ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued)

FIGURE 16. LAYER 8

AN1553 Rev 0.00 Page 19 of 20 Mar 24, 2010

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