ISL6565BEVAL1: Voltage Regulator Down Solutions for Intel Designs ® Application Note February 2004 AN1126 Author: Shawn Evans Introduction ISL6565B VRD Reference Design The Intel family of microprocessors continues to increase in size with the addition of its next generation microprocessors. These newer processors are the most advanced pieces of silicon Intel has developed, requiring advanced power management solutions that have strict requirements for core voltage, transient response, and peak current demands. Responding to the increasing needs of these new Intel processors, Intersil introduces the ISL6565B and ISL6605 chipset to enable the next generation of power management solutions. The evaluation kit consists of the ISL6565BEVAL1 evaluation board, associated data sheets on the ISL6565B controller and ISL6605 driver, as well as this application note. The evaluation board is designed to meet the output voltage and current specifications, shown in Table 1, with the VID DIP switches (U7 or U8) set to 100101 (1.400V). TABLE 1. ISL6565BEVAL1 DESIGN PARAMETERS MAX TYPICAL MIN No Load VCORE Regulation 1.400V 1.380V 1.360V Intersil ISL6565B and ISL6605 VCORE Tolerance +20mV The ISL6565B controller IC and three ISL6605 Driver ICs work together to create a versatile three-phase power management solution. The ISL6565B is tailored specifically to accommodate Intel’s next generation microprocessor specifications, while the ISL6605 is a high efficient singlephase driver, capable of handling the stresses of high current loads. The ISL6565BEVAL1 combines these four ICs to form a highly integrated solution for Intel’s high current, high slew-rate applications. Load Line Slope The ISL6565B regulates core voltage, balances the phase currents, and provides protective features for two or three synchronous buck converter channels. The controller uses a 6-bit DAC, giving the user a digital interface to select the output voltage, which is precisely regulated to ±0.5% accuracy using differential remote voltage sensing. The ISL6565B also has DCR current sensing to balance the channel currents and give the user control of the output voltage over load current. Other features of the controller include over-current and under-voltage protection, internal temperature compensation, programmable voltage offset, and dynamic VID circuitry. For more information about the ISL6565B, consult the data sheet [1]. The ISL6605 is a high frequency, MOSFET driver, which drives multiple N-channel power MOSFETs. With a 4A sink current capability, fast rise and fall times, and short dead times, the ISL6605 can drive up to three upper and three lower MOSFETs efficiently, pushing load currents as high as 40A per phase. With the addition of adaptive shoot through technology, the ISL6605 is the premium driver to use with the ISL6565B controller to create a full power management solution. For further details on the ISL6605, consult the data sheet [2]. The Intersil multi-phase family controller and driver portfolio continues to expand with new selections to better fit our customer’s needs. Refer to our web site for updated information: www.intersil.com. 1 PARAMETER 1.0mΩ Continuous Load Current 5A Load Current Step 95A Load Current Transient -20mV 100A/µs The evaluation board provides convenient test points, two types of power supply connectors, a dynamic VID test circuit, and an on-board transient load generator to facilitate the evaluation process. On board LEDs are present to indicate the status of the PGOOD and OVP signals. The board is configured for down conversion from 12V to the DAC setting. The printed circuit board is implemented in 4-layer, 1-ounce copper. Layout plots and part lists are provided at the end of the application note for this design. Quick Start Evaluation VID Setup The ISL6565BEVAL1 board has two options for VID selection, a Static VID mode and a Dynamic VID mode. When in static VID mode the VID code, set by the Static DIP switch (U7), will not change during operation. If the dynamic VID mode is chosen, the regulator will start up with the VID code dictated by the Dynamic VID DIP switch (U8). This VID code can then be changed during the operation of the regulator to test the dynamic VID circuitry of the ISL6565B. Toggling the VID SELECT switch (S6) will change between the two modes (static and dynamic) of operation. The Static and Dynamic VID DIP switches (U7 and U8) are preset to 100101 (1.400V). If another output voltage level is desired, refer to page 14 of the ISL6565B data sheet for the complete DAC table and change the VID switches accordingly. Note that changing the VID states will change the dynamics of the load generator. CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1126 Jumper Setup On-Board Load Transient Generator There are two jumpers on the ISL6565BEVAL1 that must be populated before the board is powered. J1 selects the VCC voltage to the ISL6565B controller. This jumper is preset to 5V, but can be changed to 12V if desired. J2 sets the method by which the ENLL pin of the controller will be connected. This jumper is preset to the 5V setting, so that this pin is always connected high. This jumper can only be changed to the VID setting if the dynamic VID circuit is in use. Before connecting the power supplies to the board, place switches S1 and S2 in the “OFF” position. Most bench-top electronic loads are not capable of producing the current slew rates required to emulate modern microprocessors. For this reason, a discrete transient load generator is provided on the evaluation board, see Figure 1. The generator produces a load pulse of 225µs in duration with a period of 27ms. The pulse magnitude is approximately 95A with rise and fall slew rates of approximately 100A/µs as configured. The short load current pulse and long duty cycle is required to limit the power dissipation in the load resistors (R47-R51) and MOSFETs (Q21, Q22). To engage the load generator simply place switch SW2, in the “ON” position. VCC12 R41 46.4kΩ HS VSS 2 R42 ON 402Ω OFF S3 R44 562Ω R43 VCORE BAV99LT1 S4 R48 0.033Ω R49 0.033Ω 249Ω R46 562kΩ R45 Q22 HUF76129 BAV99LT1 R47 OPEN S2 C74 22µF M3 2N7002 Q21 HUF76129 In order to enable the controller all of the previous steps mentioned in the “Quick Start Evaluation” section must have been followed. If these steps have been properly followed, the regulator is enabled by toggling the ENABLE switch (S1) to the ON position. When S1 is switched, the voltage on the EN pin of the ISL6565B will rise above the ENABLE threshold of 1.31V and the controller will being its digital soft start sequence. The output voltage ramps up to the programmed VID setting, at which time the PGOOD indicator will switch form red to green. LO U6 Power Output Connections Enabling the Controller HO HIP2100 Once power is applied to the board, the PGOOD LED indicator will begin to illuminate red. With S1 in the OFF position, the ENABLE input of the ISL6565B is held low and the startup sequence is inhibited. The ISL6565BEVAL1 output can be exercised using either resistive or electronic loads. Copper alloy terminal lugs provide connection points for loading. Tie the positive load connection to VCORE, terminals J3 and J4, and the negative to ground, terminals J5 and J6. A shielded scope probe test point, J7, allows for inspection of the output voltage, VCORE. LI C72 1µF HB The second method of powering the ISL6565BEVAL1 board is with bench-top power supplies. Three female-banana jacks are provided for connection of bench-top supplies. Connect the +5V terminal to J8, +12V terminal to J9, and the common ground to terminal J10. Voltage sequencing is not required when powering the evaluation board. If the DAC code is changed from 100101(1.400V), the transient generator dynamics must be adjusted relative to the new output voltage level. Place a scope probe in TP9 to measure the voltage across the load resistors and the dV/dt across them as well. Adjust the load resistors, R34-R38, to achieve the correct load current level. Change resistors R30-R33 to increase or decrease the dV/dt as required to match the desired dI/dt profile. HI The ISL6565BEVAL1 includes two different methods for powering up the board. The first method allows for the use of an ATX power supply. The 20-pin header, J13, allows for the connection of the main ATX power connector, while the 4-pin header, J11, connects the 12V AUX power. It is very important that both connections are secure and the S1 and S2 switches are in the OFF position before switching on the ATX supply. VDD Input Power Connections R50 0.033Ω R51 0.200Ω 249Ω J12 VLOAD FIGURE 1. LOAD TRANSIENT GENERATOR Application Note 1126 ISL6565B VRD Performance Soft-Start Interval The typical start-up waveforms for the ISL6565BEVAL1 are shown in Figure 2. The waveforms represented in this image show the soft-start sequence of the regulator starting into a 100A load with the DAC set to 100101 (1.40V). Before the soft-start interval begins, VCC is above POR and ENLL is a logic high. With these two conditions met, throwing the ENABLE switch into the ON position causes the voltage on the EN pin to rise above the ISL6565B’s enable threshold, beginning the soft-start sequence. For a fixed time of 1ms, VCORE does not move due to the manner in which soft-start is implemented within the controller. After this delay, VCORE begins to ramp linearly toward the DAC voltage. With the converter running at 300kHz, this ramp takes approximately 5ms, during which time the input current, ICC12, also ramps slowly due to the controlled building of the output voltage. VCORE, 500mV/DIV ICORE, 50A/DIV 0V create a negative 20mV offset, regulating VCORE to the typical no load voltage of 1.380V specified in Table 1. Load line regulation is supported by the ISL6565B through the use of a resistor (R13) connected between the FB and VDIFF pins. The average current of the three active channels flows out of the FB pin across this resistor, and creates a voltage drop proportional to the output current of the converter. This voltage drop actively changes the position of the core voltage as the output current changes, creating an output voltage droop. For this design, the voltage droop is programmed to meet the set load line of 1mΩ. The leading edge transient response of the ISL6565BEVAL1, which meets the design specifications of Table 1, is shown in Figure 3. In order to obtain the load current waveform shown, a bench top load is providing a constant 5A, while the on-board transient generator is pulsing a 95A step for 225µs. When the load step occurs, the output capacitors provide the initial output current, causing VCORE to drop suddenly due to the ESR and ESL voltage drops in the capacitors. The controller immediately responds to this drop by increasing the PWM duty cycles to as much as 66%. The duty cycles then decrease to stabilize VCORE and the built in load line regulation holds the output voltage at the programmed level of 1.280V. 0A ICC12, 10A/DIV 1.38V 0A 0V VCORE, 50mV/DIV PGOOD, 5V/DIV 1.28V EN, 2V/DIV 100A 0V LOAD CURRENT, 50A/DIV 1ms/DIV FIGURE 2. SOFT-START INTERVAL WAVEFORMS Once VCORE reaches the DAC set point, the internal pull down on the PGOOD pin is released. This allows a resistor from PGOOD to VCC to pull PGOOD high and the PGOOD LED indicator changes from red to green. Transient Response The ISL6565BEVAL1 design parameters require the regulator to support a 95A maximum load step to a 5A continuous load. This load step will have a maximum slew rate of approximately 100A/µs on both the rising and falling edges. The on-board load transient generator is designed to provide the specified load step, simulating the actual conditions seen at the CPU socket on a motherboard. During the transient the core voltage is required to be regulated with a load line of 1mΩ and a tolerance of ±20mV around this load line. In order to meet these design parameters the controller VID is programmed to the maximum no load voltage of 1.400V (100101). A 4.32kW resistor (R7) is placed between the OFS pin and ground to 3 0A PWM1, 10V/DIV 0V PWM2, 10V/DIV 0V PWM3, 10V/DIV 0V 5µs/DIV FIGURE 3. RISING EDGE TRANSIENT RESPONSE At the end of the 225µs load pulse, the load current returns to the bench-top set level of 5A. The transient response to this falling edge of the load is shown in Figure 4. When the falling load step occurs, the output capacitors must absorb the inductor current which can not fall at the same rate of the load step. This causes VCORE to rise suddenly due to the ESR and ESL voltage drops in the capacitors. The controller Application Note 1126 immediately responds to this rise by decreasing the PWM duty cycles to zero, and then increasing them accordingly to regulate VCORE to the programmed 1.375V level. 1.38V VCORE, 50mV/DIV 1.28V Placing the PWM signals into a high impedance state forces the ISL6605 drivers to turn the upper and lower MOSFETs off, causing VCORE to fall to 0V. The controller holds the PWM signals in this state for a period of 4096 switching cycles, which at 300kHz is 13.5ms. The controller then reinitializes the soft-start cycle. If the load that caused the over-current trip remains, another over-current trip will occur before the soft-start cycle completes. The controller will continue to try to cycle soft-start indefinitely until the load current is reduced, or the controller is disabled. This operation is shown in Figure 5. 100A VID on the Fly LOAD CURRENT, 50A/DIV 0A PWM1, 10V/DIV 0V PWM2, 10V/DIV 0V PWM3, 10V/DIV 0V 5µs/DIV FIGURE 4. FALLING EDGE TRANSIENT RESPONSE Over-Current Protection The ISL6565B protects the CPU if an over-current event occurs by continuously monitoring the current through each channel. This is done by sensing the current through each channel’s inductor and creating a proportional current, ISEN, which flows out of the ICOMMON pin. This ISEN current is set by resistor R21 to be 70µA when the maximum load current is applied. If the ISEN current for any channel ever increases above 110µA, the ISL6565B immediately places the PWM signals into a high impedance state. The ISL6565B is designed to monitor the VID code from the Intel CPU at all times, and to actively adjust the output voltage if the VID code should change during normal operation. To do this, the controller checks the VID inputs six times every switching cycle. If the VID code is found to have changed, the controller will begin executing 12.5mV DAC steps six times per cycle until VID and DAC are equal. To simulate a VID transition, the ISL6556BEVAL1 has an onboard dynamic VID generator which simulates a VID-on-thefly transition. Using the dynamic VID circuit requires first toggling the VID SELECT switch (S6) to the DYNAMIC position. The DYNAMIC VID dip switch chooses the starting VID code for the controller. Pressing the DYNAMIC SWITCH (S5) button begins the VID transition. The on-board circuit is designed to transition the VID code 450mV below the DYNAMIC VID DIP switch code in 12.5mV steps that occur every 5µs. 1.40V VCORE, 200mV/DIV 5V VID12.5, 5V/DIV VCORE, 1V/DIV 5V 1.0V Load Current, 200A/DIV 50µs/DIV 0A PWM1, 10V/DIV 0V PWM2, 10V/DIV 0V PWM3, 10V/DIV 0V 10ms/DIV FIGURE 5. OVER-CURRENT PROTECTION 4 FIGURE 6. VID-ON-THE-FLY TRANSITION FROM 1.40V TO 0.950V Figure 6 shows a VID-on-the-fly transition from 1.40V (100101) to 0.950V(001011). This transition begins with the DYNAMIC SWITCH signal transition from 5V to 0V. Every time the VID code changes, the VID12.5 signal transitions between 0V and 5V. During the VID transitions, as Figure 6 shows, the controller smoothly transitions from one code to the next until the final code of 0.9500V is reached. Application Note 1126 Pressing the DYNAMIC SELECT switch again returns the VID code to the original setting of 1.40V, as Figure 7 shows. This transition is handled smoothly by the ISL6565B with no overshoot as the final code is reached. Thermal Performance Table 2 shows the laboratory measured upper and lower MOSFET, inductor, and driver temperatures at 100A of load current. The measurements were performed at room temperature (26 °C) and taken at thermal equilibrium with 300LFM OF AIR FLOW. 1.40V TABLE 2. THERMAL DATA AT 100A LOAD VCORE, 200mV/DIV COMPONENT 5V VID12.5, 5V/DIV PHASE 2 PHASE 3 Upper MOSFETs 73°C 65°C 76°C Lower MOSFETs 72°C 60°C 73°C Driver 63°C 62°C 68°C Inductor 59°C 56°C 58°C Summary 5V DYNAMIC SWITCH, 5V/DIV 50µs/DIV FIGURE 7. VID-ON-THE-FLY TRANSITION FROM 0.950V TO 1.40V Efficiency The efficiency of the ISL6565BEVAL1 board, loaded from 5A to 105A, is plotted in Figure 8. Measurements were performed at room temperature and taken at thermal equilibrium with 300LFM OF AIR FLOW. The efficiency peaks just below 90% at 30A and then levels off steadily to approximately 82% at 105A. The use of air flow is recommended for Intel’s microprocessor designs, with 300LFM as the mean. The addition of air flow keeps the components cooler and raises the overall efficiency across the load range. 92 90 EFFICIENCY (%) PHASE 1 88 86 84 82 80 78 0 -20 40 60 80 LOAD CURRENT (A) FIGURE 8. EFFICIENCY vs LOAD CURRENT 5 100 The ISL6565BEVAL1 is an adaptable evaluation tool which showcases the performance of the ISL6565B and ISL6605 chipset. Designed to meet the performance requirements of Intel’s next generation designs, the board allows the user the flexibility to configure the board for current as well as future microprocessor offerings. The following pages provide a schematic of the board, bill of materials and layout drawings to support implementation of this solution. References Intersil documents are available on the web at www.intersil.com. [1] ISL6565 Data Sheet, Intersil Corporation, File No. FN9135 [2] ISL6605 Data Sheet, Intersil Corporation, File No. FN9091 Application Note 1126 Schematic 6 Application Note 1126 Schematic (Continued) 7 Application Note 1126 Schematic (Continued) Bill of Materials QTY REFERENCE VALUE 1 C1 22pF 1 DESCRIPTION VENDOR PART NO. PACKAGE Capacitor, Ceramic, 50V, X7R, 10% Various 0805 C2 0.022µF Capacitor, Ceramic, 50V, X7R, 10% Various 0805 1 C3 0.01µF Capacitor, Ceramic, 50V, X7R, 10% Various 0805 1 C4 DNS Capacitor, Ceramic Various 0805 1 C5 DNS Capacitor, Ceramic Various 0603 7 C6, C10-C15 1.0µF Capacitor, Ceramic, 16V, X7R, 10% Various 0805 3 C7-C9 0.1µF Capacitor, Ceramic, 50V, X7R, 10% Various 0805 4 C16, C18, C20, C72 1.0µF Capacitor, Ceramic, 16V, X7R, 10% Various 1206 3 C17, C19, C21 2200pF Capacitor, Ceramic, 50V, X7R, 10% Various 0805 4 C22-C25 1800µF Capacitor, AL Electrolytic, 16V Rubycon 12 C26, C27, C32, C36, C37, C40, C41, C45, C47, C63, C66, C69 DNS Capacitor, Ceramic Various 1206 20 C28, C31, C33, C38, C42, C46, C49-C51, C54-C61, C64, C67, C70 22µF Capacitor, Ceramic, 6.3V, X5R, 20% Various 1206 8 16MBZ1800M10X23 Thru Hole Application Note 1126 Bill of Materials (Continued) QTY REFERENCE VALUE DESCRIPTION 10 C29, C30, C34, C35, C39, C43, C44, C48, C52, C53 560µF 1 C73 1 C74 22µF Capacitor, Ceramic, 16V, X5R, 20% TDK 2 C75, C76 2.2pF Capacitor, Ceramic, 50V, X7R, 10% Various 1 C77 1.0µF Capacitor, Ceramic, 10V, X7R, 10% 4 C78, C82, C84, C86 0.01µF Capacitor, Ceramic, 16V, X7R, 10% Various 0603 2 C79, C80 0.1µF Capacitor, Ceramic, 50V, X7R, 10% Various 0603 3 C81, C83, C85 10µF Capacitor, Ceramic, 10V, X7R, 10% Various 1206 1 D1 Red/Green LED Lumex SLL-LXA3025IGC SMT 1 D2 Red LED Lumex SLL-LXA1725IC SMT 2 J1, J2 Molex HDR 1x3 1MT Hole Molex 4 J3-J6 Terminal Connector Burndy KPA8CTP Solder Mount 2 J7, J12 Probe Socket Tektronix 1314353-00 Thru Hole 2 J8-J9 Female Banana Connector, Red Johnson Components 111-0702-001 Screw On 1 J10 Female Banana Connector, Black Johnson Components 111-0703-001 Screw On 1 J11 2x2 Power HDR 1MTG Hole Molex 39-29-9042 Thru Hole 1 J13 2x10 Power Conn-1MTG Pin Molex 39-29-9203 Thru Hole 1 L1 Inductor, T50-8/90 core, 8 turns AWG16 Micrometals T50-8/90 Thru Hole 3 L2-L4 Pulse PA1513.321 Surface Mount 15 P1-P4, P6-P9, P11, P17-P22 Small Test Point Jolo SPCJ-123-01 Thru Hole 8 P5, P10, P12-P16, P23 Turret Test Point Keystone 1514-2 Thru Hole 2 Q1, Q20 General Purpose MOSFET Various 2N7002 SOT-23 9 Q2-Q4, Q8-Q10, Q14-Q16 Power MOSFET International Rectifier IRLR7833 TO-252AA 9 Q5-Q7, Q11-Q13, Q17-Q19 Power MOSFET International Rectifier IRLR7821 TO-252AA 2 Q21, Q22 Power MOSFET Vishay SUD50N03-07 TO-252AA 3 R1, R2, R5 2.43kΩ Resistor, 1%, 1/16W Various 0603 19 R3, R22, R52-R64, R66-R68, R70 10kΩ Resistor, 1%, 1/16W Various 0603 1 R4 8.06kΩ Resistor, 1%, 1/16W Various 0603 6 R10, R14, R19, R29-R31 0Ω Resistor, 1%, 1/16W Various 0603 6 R6, R9, R11, R12, R18, R73 DNS Resistor Various 0603 1 R7 4.32kΩ Resistor, 1%, 1/16W Various 0603 1 R8 261kΩ Resistor, 1%, 1/16W Various 0603 1 R13 1.69kΩ Resistor, 1%, 1/16W Various 0603 Capacitor, OS-CON, 4V 1000pF Capacitor, Ceramic, 50V, X7R, 10% 1.0µH 0.320µH Inductor, 13x13mm 9 VENDOR Sanyo PART NO. 4SEPC560MX Various PACKAGE Thru Hole 0603 C3225X5R1C226M 1210 0603 0805 Thru Hole Application Note 1126 Bill of Materials (Continued) QTY REFERENCE VALUE 1 R15 1.87kΩ Resistor, 1%, 1/16W Various 0603 1 R16 10.7kΩ Resistor, 1%, 1/16W Various 0603 1 R17 301Ω Resistor, 1%, 1/8W Various 1206 1 R20 100kΩ Resistor, 1%, 1/16W Various 0603 1 R21 432Ω Resistor, 1%, 1/16W Various 0603 1 R23 56.2kΩ Resistor, 1%, 1/16W Various 0603 3 R26-R28 499kΩ Resistor, 1%, 1/16W Various 0603 2 R32, R37 DNS Resistor Various 1206 2 R33, R35 0Ω Resistor, 1%, 1/8W Various 1206 3 R38-R40 2.2Ω Resistor, 1%, 1/8W Various 1206 1 R41 46.4kΩ Resistor, 1%, 1/16W Various 0603 1 R42 402Ω Resistor, 1%, 1/16W Various 0603 1 R43, R45 249Ω Resistor, 1%, 1/16W Various 0603 1 R44, R46 562Ω Resistor, 1%, 1/16W Various 0603 1 R47 DNS Thick Film Chip Resistor Various 2512 2 R48, R49, R50 0.033Ω Thick Film Chip Resistor, 1%, 1W Various 2512 1 R51 0.200Ω Thick Film Chip Resistor, 1%, 1W Various 2512 1 R65 100kΩ Resistor, 1%, 1/16W Various 0603 1 R69 48.7kΩ Resistor, 1%, 1/16W Various 0603 1 R71 60.4kΩ Resistor, 1%, 1/16W Various 0603 1 R72 340kΩ Resistor, 1%, 1/16W Various 0603 1 R74 249kΩ Resistor, 1%, 1/16W Various 0603 3 S1, S2, S6 Switch SPDT, Ultra Mini Toggle C&K Components GT11MSCKE SMD 2 S3, S4 Dual Diode Various BAV99 SOT-23 1 S5 Momentary Pushbutton Switch Panasonic SW_EVQ_QWX SMD 1 U1 Endura Multi-phase Controller Intersil ISL6565BCR MLFP-28 1 U2 Endura Multi-phase Controller Intersil ISL6565BCB SOIC-28W 3 U3, U4, U5 Endura Multi-phase Driver Intersil ISL6605CB SO-8 1 U6 MOSFET Driver IC Intersil HIP2100IB SO-8 2 U7, U8 Low Profile DIP Switch, SPST, 6 Position C&K Components SD06H0SK SMT 1 U9 8.00MHz Quartz Crystal Citizen HCM49-8.000MABJT SMD 1 U10 8-bit microcontroller Microchip PIC16F873A-SO SOIC-32W 1 U11, U12 Quad 2-to-1 Line Data Selector/Multiplexer Texas Instruments SN74HC157D SOIC-16 DNS 10 DESCRIPTION VENDOR PART NO. PACKAGE Application Note 1126 ISL6565BEVAL1 Layout FIGURE 9. SILK SCREEN TOP 11 Application Note 1126 ISL6565BEVAL1 Layout (Continued) FIGURE 10. LAYER 1: TOP COPPER 12 Application Note 1126 ISL6565BEVAL1 Layout (Continued) FIGURE 11. LAYER 2: GROUND PLANE 13 Application Note 1126 ISL6565BEVAL1 Layout (Continued) FIGURE 12. LAYER 3: POWER PLANE 14 Application Note 1126 ISL6565BEVAL1 Layout (Continued) FIGURE 13. LAYER 4: BOTTOM COPPER 15 Application Note 1126 ISL6565BEVAL1 Layout (Continued) FIGURE 14. SILK SCREEN BOTTOM All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. 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 data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 16