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 11 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 9. LAYER 1 12 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 10. LAYER 2 13 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 11. LAYER 3 14 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 12. LAYER 4 15 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 13. LAYER 5 16 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 14. LAYER 6 17 AN1553.0 March 24, 2010 Application Note 1553 ISL62881CGPUEVAL2Z Evaluation Board Layout (Continued) FIGURE 15. LAYER 7 18 AN1553.0 March 24, 2010 Application Note 1553 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 19 AN1553.0 March 24, 2010