Application Note 1632 ISL9440AMGTHEVAL1Z - Power Module User Guide Introduction Voltage margining on all the output rails is achieved by changing the equivalent feedback resistor divider setting using the I2C bus controlled quad-Digitally Controlled Potentiometer (DCP) ISL22346. The ISL9440AMGTHEVAL1Z is Intersil’s high performance, cost-effective power module for Xilinx’s high speed GTH serial transceivers on Virtex-6 HXT Characterization Boards. Utilizing the popular ISL9440A and ISL8009A for the power stage, the module also features quad-DCP ISL22346 for set point adjustment. Sequencing is achieved using Intersil’s dual voltage monitor ISL88012. The power module achieves excellent regulation by remotely sensing the output voltage close to its load. Figure 1 shows the block diagram implementation of the power module. This user guide is intended to serve as a manual for using the ISL9440AMGTHEVAL1Z power module and also list its various performance characteristics. 5V FOR BIAS ISL9440A PWM1 1.1V, 3.5A MGTHAVCCRX 3.3V FOR POWER STAGE Key Features PWM2 The ISL9440AMGTHEVAL1Z power module uses the three channel buck controller and single linear controller ISL9440A for generating voltage rails MGTHAVCC, MGTHAVCCRX and MGTHAVCCPLL. MGTHAVTT is generated using the tiny integrated FET regulator ISL8009A. Switching at 600kHz, the ISL9440A reduces output inductor and capacitor requirements. The ISL8009A integrates upper and lower power MOSFETs and switches at 1.6MHz, reducing external component requirements even further. Table 1 lists the specifications of each rail. 1.1V, 5.1A MGTHAVCC EN1 ISL88012 (DUAL SUPPLY MONITOR) EN2 EN3 PWM3 1.8V, 2.6A MGTHAVCCPLL ISL22346 (DCP) ISL8009A EN 1.2V, 1.5A MGTHAVTT FIGURE 1. ISL9440AMGTHEVAL1Z BLOCK DIAGRAM FIGURE 2. ISL9440AMGTHEVAL1Z TOP VIEW TABLE 1. POWER MODULE PARAMETERS PARAMETER MGTHAVCC MGTHAVCCRX MGTHAVTT MGTHAVCCPLL Output Voltage 1.1V ±1% 1.1 ±1% 1.2 ±1% 1.8 ±1% Rated Current 5.5A 4A 1.5A 3.2A Peak to Peak Ripple <10mV <10mV <10mV <10mV Please contact Intersil Marketing for ordering this power module. March 31, 2011 AN1632.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. Copyright Intersil Americas Inc. 2011. All Rights Reserved. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. Application Note 1632 TABLE 2. ADDRESS BYTE AND VALUE OF WIPER REGISTER FOR MARGINING WR FOR -10% MARGINING (HEX) WR FOR -5% MARGINING (HEX) WR FOR +5% MARGINING (HEX) WR FOR +10% MARGINING (HEX) WR FOR +15% MARGINING (HEX) OUTPUT RAIL ADDRESS (HEX) DEFAULT VALUE (HEX) MGTHARX 00 5D 6E 66 52 4A 42 MGTHAVCC 01 5D 6E 66 52 4A 42 MGTHAVCCPLL 10 37 5A 48 29 1B 0F MGTHAVTT 11 56 6E 62 4C 43 39 Voltage Margining Using DCP The ISL22346 is a quad-DCP that allows changing the center tap position by writing an 8-bit word into its Wiper Position (WP) register through the I2C bus. Changing the center tap position of DCP changes the equivalent feedback resistor divider and results in a change in output voltage. The DCP can be identified via the I2C byte ‘A0’. Please refer to the part datasheet for description of the I2C bus. Table 2 lists the MGTHAVCCPLL MGTHAVCC MGTHAVTT MGTHAVCCRX specific address for each output rail. It also lists the typical value of the wiper register for each rail to achieve margining. Margining is fairly linear between the values shown. Sequencing Using ISL88012 The power module uses the 5V input rail to bias the ISL9440A. The 3.3V input rail is used as input voltage for power conversion. The ISL88012 is a dual voltage monitor that signals a logic high when both the 5V and the 3.3V rails have started up. Subsequent RC circuits are used to generate delays on ‘Enable’ of each individual output rail to give the following start-up sequence: 1. MGTHAVCC powers up first. 2. MGTHAVCCRX powers up within 1ms of MGTHAVCC. 3. MGTHAVTT and MGTHAVCCPLL delayed relative to MGTHAVCC and MGTHAVCCRX by a minimum of 10µs. Figure 3 shows a typical start-up waveform. 2 VOLTAGES AT 500mV/DIV TIME AT 5ms/DIV FIGURE 3. START-UP SEQUENCE Protection Features All the output rails feature overcurrent protection. Please refer to ISL9440A and ISL8009A datasheets for specific overcurrent protection mechanisms. The ISL9440A also has output over voltage protection. Both the controllers feature built-in thermal protection. In the event remote sense feedback from control connector J2 is lost, the module will not get damaged. In fact, all the output rails of the power module continue good voltage regulation under such an event. This is achieved via a redundant internal feedback path. AN1632.0 March 31, 2011 Application Note 1632 Typical Performance Curves 2.0 100 1.5 MGTHAVCCPLL (1.8V, 2.6A) REGULATION (%) EFFICIENCY (%) 80 MGTHAVCCRX (1.1V, 3.5A) 60 MGTHAVCC (1.1V, 5.1A) MGTHAVTT (1.2V, 1.5A) 40 MGTHAVTT (1.2V, 1.5A) 1.0 MGTHAVCC (1.1V, 5.1A) 0.5 0 -0.5 MGTHAVCCPLL (1.8V, 2.6A) -1.0 20 MGTHAVCCRX (1.1V, 3.5A) -1.5 0 20 40 60 80 FULL LOAD (%) FIGURE 4. EFFICIENCY vs LOAD CURRENT MGTHAVCC AT 10mV/DIV TIME AT 2µs/DIV FIGURE 6. MGTHAVCC OUTPUT RIPPLE (LOAD = 5.1A) MGTHAVCCPLL AT 10mV/DIV TIME AT 2µs/DIV FIGURE 8. MGTHAVCCPLL OUTPUT RIPPLE (LOAD = 2.6A) 3 100 -2.0 0 20 40 60 80 100 FULL LOAD (%) FIGURE 5. LOAD REGULATION MGTHAVCCRX AT 10mV/DIV TIME AT 2µs/DIV FIGURE 7. MGTHAVCCRX OUTPUT RIPPLE (LOAD = 3.5A) MGTHAVTT AT 2mV/DIV TIME AT 2µs/DIV FIGURE 9. MGTHAVTT OUTPUT RIPPLE (LOAD = 1.5A) AN1632.0 March 31, 2011 Schematic 5 4 3 2 1 V_3p3 CIN3 CIN1 CIN2 DNP 10u 6.3V 10u 6.3V CIN4 10u 6.3V Q1 M2 FDS6982AS Q2 PH2 UG2 J2 UG3 22 1.8V @ 2.6A LG3 21 0.1u Crx1 Crx2 Crx3 Crx4 0.1uF 16V 47u 6.3V DNP 6.3V 47u 6.3V Rsen3 1.5K R39 V_3p3 A1 200 VCCRX_SNS 0 PH2 3 EN_VCC 5 Cdcr22 100p R11 Cp2 69.8K DNP 1% RST VMON 4 1% V_3p3 EN_VCCRX D2 DNP R9 25.5K 1% 5 FB_VTT 50K 1% CIN7 CIN8 10u 6.3V DNP 16 17 A0 19 18 RH1 RW0 RL1 ISL22346 U3 RH3 RW1 RL3 RH2 RW3 RL2 Epad 15 VCC_SNS 14 13 1% R24 10K 12 FB_VCC VCCPLL_SNS R25 0 1% 11 21 R22 0 1% FB_VCCPLL 150K 1% SCL SDA 3 4 VIN EN LX ISL8009A GND POR SKIP VFB RSI 8 Coiltronics SD53-2R0-R VTT Ltt 7 6 5 2.0u FB_VTT 200R411% VTT_SNS R4 59K 1% R30 0 1% Ctt1 Ctt2 Ctt3 Ctt4 22u 6.3V DNP DNP 22u 6.3V 1.2V @ 1.5A 0805 Size Cff4 DNP R7 118K 1% Cdel1 0.047uF Cdel2 0.47uF 4 RL0 U2 1 EN_VTT 2 RPOR 100K 1% R5 102K VTT_SNS3 R12 EN_VCCPLL V_5p0 GND 2 0.47u 6.3V R23 ISL88012 R28 10K 1% FB_VCCRX 1% 10K R27 PH3 9 2 VDD 1 1% R10 0 1% 0.47u 6.3V CIN10 U4 RST/MR# R40 19.6K DNP V_3p3 1 R29 50K 1% EN_VCCPLL Cp3 Cdcr32 100p RW2 R26 A1 3.3n Cdcr31 3.3n Cdcr21 R38 19.6K CIN9 A0 VCCPLL VCC 1210/1206 Size Rpu 30K 1% CL3 DNP EN_VCCPLL R37 200 1.1V @ 3.5A LG3 RL3 DNP 10 Lrx 1.5u 1.5u 1210/1206 Size VCC_SNS VCCRX PH1 0.1uF 16V 16V UG3 Q2 PH3 R6 63.4K 1% ROC3 50K Cll1 47u 6.3V VCC 17 CB3 Cll2 47u 6.3V GND 18 R17 0 Cll3 47u 6.3V SDA 20 19 Cll4 9 R8 26.1K 1% Coiltronics DR73-1R5-R CL1 DNP DNP Lll 23 Q1 MPLL FDS6982AS PH3 20 EN/SS3 24 R3 78.7K 1% FB_VCC MRX FDS6982AS 1.1V @ 5.1A VCCPLL FB_VCCPLL RL1 DNP D1 47u 6.3V 1210/1206 Size EPAD Q2 47u 6.3V Coiltronics DR73-1R5-R ROC2 50K LG1 47u 6.3V RH0 FB_VCC V_3p3 Q1 UG1 47u 6.3V 25 PHASE2 27 26 BOOT2 30 28 LGATE2 UGATE2 LGATE1 ISEN3 RST_N PH1 47u 6.3V SHDN# DNP Ccc4 DNP 10V 6 R43 10K PHASE3 OCSET1 Cdcr12 330p R36 15K Ccc3 SCL 2.2n 8 BOOT3 FB1 PAD A0 A1 ROC1 50K R2 69.8K 1% Ccc2 V_3p3 VCCPLL_SNS Cp1 Cdcr11 UGATE3 ISL9440A EN/SS1 FB3 7 VCCRX VIN 16 SCL SDA 6 PGND OCSET3 FB_VCCRX R35 200 ISEN2 LGATE3 EN/SS2 EN_VCCRX 5 Ccc1 Rsen2 1.1K VCC_5V FB2 4 R1 26.1K 1% VCCRX_SNS Ccc6 CL2 1200pF CB2 0.1u PGOOD 15 3 OCSET2 2 6.3v ISEN1 SGND 1 CVCC1 4.7u 13 10 12 RFIN1 V_5p0 UGATE1 Rsen1 1.1K 11 VCCPLL_SNS 29 PH1 U1 R34 0 Ccc5 16V PHASE2 32 VTT_SNS R14 0 PHASE1 R33 0 R13 0 31 16V LG1 UG1 CB1 0.1u BOOT1 M2 M1 CON8 VCCRX_SNS VCC VCCRX VTT VCCPLL G4 R32 0 V_5p0 V_3p3 LDOFB VCC_SNS 9 0 10 R31 VCC Lcc 1uH RL2 2.4R 14 EN_VCC M2 M1 1 2 3 4 5 6 7 8 J1 R42 10K CON80 Coiltronics DR74-1R0-R LG2 33 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 M2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 Title ISL9440AMGTHEVAL1Z Size Document Number Custom<Doc> Date: AN1632.0 March 31, 2011 5 4 3 2 Sunday, February 13, 2011 Sheet 1 1 Application Note 1632 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 M1 4 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 A2 DNP 8 CIN6 10u 6.3V 7 CIN5 Application Note 1632 TABLE 3. BILL OF MATERIALS ITEM QTY PART REFERENCE VALUE 1 1 Cdcr32 100pF 2 2 3 DESCRIPTION MANUFACTURER PART NUMBER 100pF; 50V; NPO, SMD, 0603 TDK C1608C0G1H101J Cdcr12, Cdcr22 330pF 330pF; 50V; NPO, SMD, 0603 TDK C1608C0G1H331J 5 CB1, CB2, CB3, Crx1, Cll1 0.1µF TDK C1608X7R1H104K 4 1 CL2 1200pF 1200pF; 50V; X7R; SMD; 0603 TDK C1608X7R1H122K 5 1 Cdcr31 3300pF 3300pF; 50V; X7R; SMD; 0603 TDK C1608X7R1H332K 6 2 Cdcr11, Cdcr21 2200pF 2200pF; 50V; X7R; SMD; 0603 TDK C1608X7R1H222K 7 1 Cdel1 0.047µF 0.047µF; 50V; X7R; SMD; 0603 TDK C1608X7R1H473K 8 3 CIN9, CIN10, Cdel2 0.47µF 0.47µF; 50V; X7R; SMD; 0603 TDK C1608X7R1H474K 9 5 CIN1, CIN2, CIN4, CIN5, CIN7 10µF 10µF; 10V; X5R; SMD; 0805 TDK C2012X5R1A106K 10 2 Ctt1, Ctt4 22µF 22µF; 6.3V; X5R; SMD; 0805 TDK C2012X5R1A226K 11 1 CVCC1 4.7µF 4.7µF; 6.3V; X5R; SMD; 0805 TDK C2012X5R0J475K 12 10 Crx2, Crx4, Ccc1-Ccc4, Ccc6, Cll2, Cll3, Cll4 47µF 47µF; 6.3V; X5R; SMD; 1206 TDK C3216X5R0J476M 13 2 LLL, LRX 1.5µH Inductor Coiltronics DR73-1R5-R 14 1 LCC 1.0µH Inductor Coiltronics DR74-1R0-R 15 1 LTT 2.0µH Inductor Coiltronics SD53-2R0-R 16 1 U3 Quad-DCP Intersil ISL22346UFRT20Z 17 1 U2 Integrated FET Regulator Intersil ISL8009AIRZ 18 1 U4 Dual Voltage Monitor Intersil ISL88012IH546Z 19 1 U1 Three Channel Buck and One Linear Regulator Controller Intersil ISL9440AIRZ 20 3 MRX, M2, MPLL Fairchild FDS6982AS 21 4 R35, R37, R39, R41 200Ω Resistor, SMD, 0603, 1% 22 1 RL2 2.4Ω Resistor, SMD, 0603, 1% 23 12 R10, R13, R14, R17, R22, R25, R26, R30, R31, R32, R33, R34. 0Ω Resistor, SMD, 0603, 1% 24 5 R24, R27, R28, R42, R43 10kΩ Resistor, SMD, 0603, 1% 25 1 RPOR 100kΩ Resistor, SMD, 0603, 1% 26 1 R5 102kΩ Resistor, SMD, 0603, 1% 27 2 RSEN1, RSEN2 28 1 R7 29 1 RSEN3 1.5kΩ Resistor, SMD, 0603, 1% 30 1 R36 15kΩ Resistor, SMD, 0603, 1% 31 1 R23 150kΩ Resistor, SMD, 0603, 1% 32 2 R38, R40 19.6kΩ Resistor, SMD, 0603, 1% 33 1 R9 25.5kΩ Resistor, SMD, 0603, 1% 34 2 R1, R8 26.1kΩ Resistor, SMD, 0603, 1% 35 1 Rpu 0.1µF; 50V; X7R; SMD; 0603 N-Channel MOSFET 1.1kΩ Resistor, SMD, 0603, 1% 118kΩ Resistor, SMD, 0603, 1% 30kΩ 5 Resistor, SMD, 0603, 1% AN1632.0 March 31, 2011 Application Note 1632 TABLE 3. BILL OF MATERIALS (Continued) ITEM QTY PART REFERENCE VALUE 36 5 R12, R29, ROC1, ROC2, ROC3 49.9kΩ Resistor, SMD, 0603, 1% 37 1 R4 38 1 R6 63.4kΩ Resistor, SMD, 0603, 1% 39 2 R2, R11 69.8kΩ Resistor, SMD, 0603, 1% 40 1 R3 78.7kΩ Resistor, SMD, 0603, 1% 41 1 RFIN 42 1 J2 43 1 J1 59kΩ 10Ω DESCRIPTION MANUFACTURER PART NUMBER Signal Connector Samtec BSE-040-01-L-D-A Power Connector Samtec MPS-08-7.70-01-L-V Resistor, SMD, 0603, 1% Resistor, SMD, 0603, 1% ISL9440AMGTHEVAL1Z PCB Layout FIGURE 10. TOP LAYER 6 FIGURE 11. SECOND LAYER (SOLID GROUND) AN1632.0 March 31, 2011 Application Note 1632 ISL9440AMGTHEVAL1Z PCB Layout FIGURE 12. THIRD LAYER (Continued) FIGURE 13. BOTTOM LAYER 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 7 AN1632.0 March 31, 2011