Power Management Application Guide Xilinx FPGAs Using Switchers P

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Power Management Application Guide Xilinx FPGAs Using Switchers P

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Power Management Application Guide Xilinx FPGAs
Using Switchers Power Xilinx FPGAs Memory
Increased gate counts higher clock speeds programmable logic have resulted higher current requirements while smaller device geometries driving lower core supply voltages. Both these trends leading more demanding power supply requirements. Fortunately, power management challenges presented high-performance FPGAs CPLDs have already been solved using solutions based Intersil's switching DC-DC products.
System Power
Sequencing Supervisory
DC-DC Converter(s)
VAUX VI/O VCORE
Memory Power
VDDQ
FPGA
Memory
I/Os
I/Os
Inside:
Intersil's Recommended Power Supply Solutions Including Schematics BOMs Selection Tables Xilinx FPGA Power Tables Memory Power Solutions Sequencers Supervisory Circuits Layout Considerations
more information, visit site
www.intersil.com/xilinx
Check Intersil's online power supply simulation tool www.intersil.com/isim
Selecting Power Supply FPGA-Based Systems
This Application Guide offers customers ways select best Intersil Power Supply solution FPGA-based systems: Selection number supplies needed (Page Selection Tree) Selection Xilinx device being used supply voltages available (Page Tables Virtex-II Pro, Spartan-3, Virtex-II) Also included this Application Guide: Power supply solutions diagrams Bill-of-Materials (Pages 6-11) Supply sequencers supervisory (Page Power solutions powering memory (Page Appendix Layout Considerations Power Supply (Page Appendix Power Current requirements Xilinx Devices (Page
What Type Regulator Should Use?
There basic types power regulators that used most electronic products: linear regulator switching regulator. Linear regulators inherently inefficient current levels required newest generations FPGA devices generate large amounts heat, which present additional challenge manage effectively. Switching regulators (PWMs) inherently more efficient because they theoretically "on" only when power needed. addition, switchers maintain efficiencies excess 90%, even when input output voltages differ large amount current requirements range from 100A. final decision type regulator should determined efficiency requirements, thermal management strategies, space constraints, cost. many cases, there good reason both types regulators design. Intersil's regulators available several configurations. These include single-phase switchers, multi-phase switchers, integrated regulators offering combinations multiple switchers and/or linear regulators single package. Several application circuits that these different approaches presented this application guide.
VOUT
IUPPER
IOUT VOUT
SHORT-CIRCUIT PROTECTION VOLTAGE REFERENCE
VPHASE
ILOWER
Linear Regulator
Synchronous Buck Switching Regulator (Pulse-Width-Modulation) Controller
Copyright Intersil Americas Inc. 2004. Rights Reserved. Intersil (and design), (and design), iSim trademarks Intersil Americas Inc. other trademarks mentioned property their respective owners.
Intersil's Power Supply Solutions
Selecting Power Supply Number Supplies Needed
Three Four
20Amps ISL6521 Synchronous Buck Linears (Option Pages 6-7) Smallest Size ISL6528 Standard Buck Linear (Option Page Highest Efficiency ISL6539 Dual Synchronous Buck (Option Page +24V ISL6227 Dual Synchronous Buck (Option Page
Ease-of-Use Integration 0.5Amps: ISL6410/A Fixed Output, Sync Buck with Integrated FETs (Option Page Amps: EL75XX Family Sync Bucks with Integrated FETS (Option Page Most Flexibility 20Amps) ISL6526 Sync Buck (Option Page +24V ISL6224 Sync Buck (Table Page Greater Than 20Amps ISL6563 two-phase Synchronous Buck with Integrated drivers (Option Page Greater Than 60Amps ISL6558 Multi-phase Synchronous Buck Controller plus HIP6601A MOSFET drivers (Table Page
Typical Field Programmable Gate Array Power Requirements
flexibility FPGAs leads requirement multiple supply voltages currents. Core Voltage Power large FPGAs, logic core generally most demanding current requirements, tens Amps depending number gates being used clock frequency. Designated VCCINT Xilinx, platform voltage required Virtex® Virtex-II Pro® series 1.5V Spartan-3 series 1.2V Voltage Power Designated VCCO equal 1.5V, 1.8V, 2.5V 3.3V depending standard selected. standards independently block FPGA, more than voltage single FPGA possible. VAUX Voltage Power: "auxiliary" supply important latest generation Xilinx FPGAs because tied into JTAG, DCM, other circuitry. designated VCCAUX usually 3.3V 2.5V. VCCAUX must sufficiently decoupled order avoid power supply transients coupling into FPGA's clock circuitry.
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Intersil's Recommended Power Supply Solutions
Virtex-II
Peak ICCINT Current Requirement* Device
XC2VP2 XC2VP4 XC2VP7 XC2VP20 XC2VP30 XC2VP40 XC2VP50 XC2VP70 XC2VP100 XC2VP125
Recommended Intersil Power Solutions VIN=+5V
ISL6528, EL75XX Family, ISL6521 ISL6521 ISL6539 ISL6526 ISL6521 ISL6563 ISL6558
13.7 20.1 28.5 35.1 49.5 66.2 83.4
200MHz
13.2 16.3 22.8 30.4 38.2
VIN=+3.3V
EL75XX Family ISL6526
Spartan-3
Peak ICCINT Current Requirement* Device
XC3S50 XC3S200 XC3S400 XC3S1000 XC3S1500 XC3S2000 XC3S4000 XC3S5000
Recommended Intersil Power Solutions VIN=+5V
ISL6410/A EL7536 ISL6528, EL75XX Family, ISL6521 EL75XX Family ISL6526
325MHz
15.3 17.6
150MHz
VIN=+3.3V
ISL6521 ISL6539
ISL6526
Virtex-II
Device
XC2V40 XC2V80 XC2V250 XC2V500 XC2V1000 XC2V1500 XC2V2000 XC2V3000 XC2V4000 XC2V6000 XC2V8000
Peak ICCINT Current (A)*
1.15 2.14 6.14 9.87 14.6 20.5 27.3 39.8 60.2 84.5 112.4
Recommended Intersil Power Solutions VIN=+5V VIN=+3.3V
ISL6528, EL75XX Family, ISL6521 EL75XX Family ISL6526
ISL6521 ISL6539 ISL6563 ISL6558
ISL6526
Calculated using Xilinx's Power Estimator, Appendix details.
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Intersil's Recommended Power Supply Solutions
Intersil Switchers Powering Xilinx FPGAs
Device ISL6521 HIP6021 ISL6520 ISL6526 ISL6526A ISL6528 ISL6529 ISL6410 ISL6410A EL7536 EL7562 EL7554 EL7566 EL7558 ISL6224 ISL6227 ISL6402/A ISL6539 ISL6558 ISL6563 Sync Buck Linears Sync Buck Linears Control Simple, 8-pin Sync Buck Voltage Sync Buck 300kHz High Frequency Sync Buck 600kHz Std. Buck Linear Sync Buck Linear 0.5A Integrated Buck 0.5A Integrated Buck Integrated Buck Integrated Buck Integrated Buck Integrated Buck Integrated Buck High Efficiency Sync Buck Dual Sync Buck with Wide Input Range Dual Sync Buck Linear Dual Sync Buck with Sequencing Multiphase Sync Buck Multiphase Sync Buck with Drivers Description Range 2.5V 3.3V 3.3V 3.3V 2.5V 5.5V 4.5V 5.5V 3.3V 4.5V 4.5V 4.5V VOUT Range 0.8V 4.5V 1.3V 3.5V 0.8V 0.8V 0.8V 0.8V 3.3V 0.8V 3.3V 1.2V, 1.5V 1.8V 1.2V, 1.8V 3.3V 0.8V 1.0V 0.9V 0.8V 0.8V 1.0V 3.8V 0.9V 5.5V 0.9V 5.5V 0.8V 0.9V 5.5V 0.8V 0.9V 3.9V IOUT 0.5A 0.5A 100A Pkg/Pin SOIC-16 SOIC-28 QFN-16, SOIC-8 QFN-16, SOIC-14 QFN-16, SOIC-14 SOIC-8 SOIC-14, QFN-16 QFN-16, MSOP-10 QFN-16, MSOP-10 MSOP-10, DFN-10 QSOP-16 HTSSOP-28 HTSSOP-28 HSOP-28 SSOP-16 SSOP-28 QFN-28, TSSOP-28 SSOP-28 SOIC-16 QFN-24
Sequencing Supervisory
+5VIN
MA732
BOOT
Supply Sequencers
Part Number ISL6123/4 ISL6125 Range 1.5V 5.5V 1.5V 5.5V 1.5V 5.5V Sequenced Range +0.7V +5.5V +0.7V +5.5V +0.7V +5.5V Comments Fully featured with charge-pump Fully featured with open drain logic Fixed Sequence with charge-pump Package QFN-24 QFN-24 QFN-24
DRIVE2
18.2k
OCSET
UGATE
5.9k
PHASE
LOUT
ISL6521
DRIVE3
12.7k 5.9k
LGATE
PGND
COMP
2.0k
ISL6127
VOUT1
DRIVE4
2.26k
1.5V
VOUT4 1.8V VOUT3 2.5V VOUT2 3.3V
9.09k
7.15k
Supervisory
Part Number ISL6131 ISL6132 ISL6536/A ICL7665S Range 1.5V 5.5V 1.5V 5.5V 2.7V 5.0V 1.8V Supervised Range +0.7V (min) +0.7V (min) +0.7V (min) +1.3V (min) Comments Quad undervoltage Dual over/ under voltage Quad undervoltage Micropower over/ under detector Package QFN-24 QFN-24 SOIC-8 SOIC-8, PDIP-8
UVLO_A UVLO_B UVLO_C UVLO_D
DLY_OFF_D DLY_OFF_C DLY_OFF_B
Intersil offers family voltage sequencers that control power-up power-down sequences voltage (0.7V 5.5V) power rails. They daisy-chainable allow sequencing higher numbers rails well. Intersil also supplies cost effective voltage supervisory circuits monitor power supply outputs.
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GATE
DLY_ON_D
ISL6123
GATE
DLY_ON_C
GATE
DLY_OFF_A DLY_ON_B
ENABLE
SYSRST#
RESET#
GROUND
DLY_ON_A
GATE
+5VSB
Four Output Voltages
Option ISL6521 Switcher VCCINT Linear Regulators VCCO1, VCCAUX, VCCO2.
Combination products that incorporate multiple switchers and/or linears single package excellent choice many FPGA-based designs. These combination devices provide voltages required from single board, they adjusted provide optimum responses application. Good layout bypassing techniques (see Appendix plus excellent on-chip isolation prevents supplies from interacting. ISL6521 provide required currents voltages latest generation Xilinx FPGAs (for example Spartan-3, Virtex-II Virtex-II Pro) 16-pin SOIC package with minimal external components. ISL6521 implements highly efficient synchronous buck design addition includes three linear regulators, which provide additional voltages board. ICCO ICCAUX currents less than 120mA supplied directly from linear regulator drive pins shown here VCCO2) they used control external transistor shown here VCCO1 VCCAUX). complete datasheet ISL6521 available Simulation tools also available http://www.intersil.com/isim/.
+5VIN
0.1µF
MA732
ISL6521
BOOT
OCSET
VCCO1 2.5V/3A
10µF
DRIVE2
Linear Regulator
0.47µF
UGATE
12.7k
5.9k
PHASE
LOUT
(see table next page)
10µF
VCCINT 1.5V/5A
LGATE
PGND
FPGA
VCCO2 3.3V/120mA
100µF
10µF
DRIVE3
Linear Regulator
Switching Regulator
COMP
2.0k
18.2k
5.9k
DRIVE4
VCCAUX
Linear Regulator
2.26k
Figure Highly Integrated ISL6521-Based Solution Memory Power Solutions, page Sequencing ICs, page
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Four Output Voltages
following bill-of-materials table shows external products selected Intersil's applications engineers optimize design 10A, 20A.
Component Selection Table
ICCINT
LOUT
7.5µH Pulse P1172.103 4.8µH Sumida CDEP134 1.6µH Sumida CDEP134 0.5µH Pulse PG0006.601
IRF7910 IRF7460 IRF7821 2xIRF7821
IRF7910 IRF7476 IRF7832 2xIRF7832
Q3/Q4
FZT649 less) 2SD1802 less) 2SD1802 (3Aor less) 2SD1802 (3Aor less)
1x1000µF 10MBZ1000M 10x12.5 2x1000µF 10MBZ1000M 10x12.5 2x1800µF 10MBZ1800M 10x20 3x1500µF 10MBZ1500M 10x16
1x1000µF 6.3MBZ1200M 8x16 2x1800µF 6.3MBZ1800M 10x16 2x3300µF 6.3MBZ3300M 10x23 3x3300µF 6.3MBZ3300M 10x23
ISL6521 automatically initializes upon receipt input power. Special sequencing input supplies necessary. Power-On Reset (POR) function continually monitors input bias supply voltage pin. function initiates soft-start operation after bias supply voltage exceeds threshold. voltages rise monotonicly less than 40ms. Also, ISL6521 includes bootstrap circuitry that allows solution powered from single supply shown Figure complete application note using ISL6521, including board layout available www.intersil.com/ along with design simulation tools.
Smallest Size, Output Voltages
Option ISL6528 8-pin, Cost Switcher VCCINT Linear Regulator VCCO
This excellent solution only voltage required. ISL6528 easily provide required current voltages latest generation FPGAs 8-pin SOIC package with minimal external components. VCCINT supplied standard buck switcher with bootstrap circuitry which enables operate from supply. +12V supply available, related ISL6529 offer even higher efficiency since implements synchronous buck design. VCCO supplied linear regulator using external transistor minimize heat dissipated ISL6528. VCCINT VCCO voltages both resistor dividers ground. This configuration applicable VCCINT from 0.8V 3.3V approximately 15A, VCCO from 0.8V 3.3V complete data sheet ISL6528 available deviceinfo.asp?pn=ISL6528, along with technical brief. Simulation tools also available http://www.intersil.com/isim/.
+3.3V
330µF
330µF
BAT54
0.1µF
UGATE
VCCINT (6A)
C9,C10 2x470µF
FPGA
VCCO (1A)
DRIVE2
11.3k
ISL6528
BOOT COMP
1.71µH
150pF 39.2k
470µF 5.36k
1500pF
2.32k
FDS6690A FZT649 ETQ-P6F1R8BFA B520C-13
Fairchild Fairchild Panasonic Diode Inc.
2.67k 0.018µF 30.9
Figure Cost, Small Board Space ISL6528-Based Solution
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Ease-of-Use Solutions
Option +3.3V Solutions EL75XX Family Integrated Switchers ISL6410/A
Single-phase switchers used generate single output voltage using either integrated power MOSFETs external power MOSFETs. integrated parts usually limited applications requiring output currents 8Amps less optimized circuit size design simplicity. Switchers using external power MOSFETs generally provide higher output currents offer other attributes that available integrated controllers. Intersil's EL7536/EL7562/EL7554/EL7566 family highly integrated switching regulators require only external components because power FETs integrated device. Input voltages possible continuous output currents amps respectively available. These products make very compact, >90% efficient solution either VCCINT VCCO. Additionally, systems continuous output EL7558 available. Component selection software, evaluation boards Gerber files available deviceinfo.asp?pn=EL7566.
COMP
SGND COSC 0.22µF
11.5K
8200pF 0.047µF
270pF
VREF
EL7566
PGND PGND PGND 100µF
VOUT (1.5V,
2.7µH 150µF
VCCINT VCCO
FPGA
Figure 3.3V EL7566-Based Integrated Buck Solution
Figure 6Amp EL7566 Eval Board (Actual Size)
Intersil's Family Buck Regulators with Integrated FETs
Part Number ISL6410 ISL6410A EL7536 EL7562 EL7554 EL7566 EL7558 Range 3.0V 3.6V 4.5V 5.5V 2.5V 5.5V 5.5V 4.5V 5.5V VOUT Selectable 1.2V, 1.5V 1.8V Selectable 1.2V, 1.8V 3.3V 0.8V 0.9V 0.8V 0.8V 3.8V IOUT 0.5A 0.5A Pkg/Pin MSOP-10, QFN-16 MSOP-10, QFN-16 MSOP/DFN-10 QSOP-16 HTSSOP-28 HTSSOP-28 HSOP-28
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Most Flexible, Single Output Voltage
Option Single Switcher ISL6526/A
ISL6526 ISL6526A designed efficient power management from voltages between 3.3V ISL6526-based design leaves power FETs external order minimize cost provide additional flexibility. example, ISL6526-based design shown supplies with external FETs with external FETs. Protection 3.3V from overcurrent conditions provided monitoring rDS(ON) upper MOSFET inhibit operation appropriately. C5-7 This approach simplifies OCSET implementation improves efficiency eliminating CPVOUT need current sense resistor. ISL6526 Additionally, design optimized BOOT CPGND given ISL6526 UGATE evaluation board available 1.5V VOUT PHASE an1021.pdf. ENABLE ENABLE
LGATE
FPGA
complete application note utilizing ISL6526, including suggested board layout available http://www. intersil.com/data/an/an1021. pdf. complete data sheet available http://www.intersil. com/products/deviceinfo. asp?pn=ISL6526.
COMP
10-12
Figure ISL6526-Based, Synchronous-Buck Solution
Suggested Bill Materials
Component
Suggested Bill Materials
Component
C5-7, 10-12
Description
1000pF Ceramic Capacitor, 3300pF Ceramic Capacitor, 18000pF Ceramic Capacitor, 10µF Ceramic Capacitor, Ceramic Capacitor, 0.1µF Ceramic Capacitor, MA732 Diode 1.5µH Inductor, 1.2m DCR, 16AWG T5052B Core 4.99k, Resistor 61.9k, Resistor 64.9, Resistor 5.62k, Resistor Design: 9.06k, Resistor Design: 9.53k, Resistor
Description
1500µF Alum Elec Cap, ESR, 6.3V Intersil Single Phase Synch Buck Regulator Design: N-Channel MOSFET (PowerPak), omit Design: N-Channel MOSFET (PowerPak)
Vendor
Rubycon Intersil Vishay
Series ISL6526 Si7840DP
Q1-4
Vishay
Si7840DP
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Highest Efficiency, Output Voltages
Option Highly Efficient, Highly Flexible Dual Switcher Solution ISL6539 ISL6227)
ISL6539 create most efficient dual-output solution using synchronous buck switchers supply VCCINT VCCO. addition, ISL6539 additional built-in sequencing control features that used further minimize cost size solution. ISL6539 also offers wide input range from +4.5V 15V, ISL6227 offered with 24V. complete data sheet application note available asp?pn=ISL6539.
+4.5V +15V
MA732
MA732
1.0µF
10µF
0.15µF
0.15µF
10µF
10µF
BOOT1
BOOT2
VCCO +2.50V 3.0A
10µH
Si7844DP
UGATE1 PHASE1
UGATE2 PHASE2
10µH Si7840DP
VCCINT
+1.5V
4.99K
17.8K
330µF
ISEN1
ISEN2
FPGA
LGATE1 PGND1
ISL6539
4.99K
LGATE2 PGND2
330µF
15nF
17.8K
Si7844DP
Si7840DP
15nF
VSEN1
VSEN2 OCSET2 SOFT2
10nF
VPULLUP
OCSET1
SOFT1
VCCO
6.65K 10.0K 17.8K 26.7K
100K
95.3K
10nF
PG2/REF
100K
26.7K
POWER GOOD VCCO ENABLE POWER GOOD VCCINT
Figure Very Power-Efficient ISL6227 ISL6539-Based Solution Memory Power Solutions, page design shown used supply both VCCINT VCCO completely independently with high efficiency. Efficiency enhanced using lower MOSFET rDS(ON) current sense element. ISL6539 control independent output voltages adjustable from 0.9V 5.5V. Power-up sequencing available integrated softstart/enable pins.
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>20Amp Solutions
Option >20A Solutions ISL6563 Multi-phase Switching Regulator
current requirements board rise greater level, more sophisticated power supply solutions required maintain well-regulated supply voltages. distributing power load current, implementation multi-phase converters utilize smaller lower cost transistors with fewer input output capacitors. These reductions accrue from higher effective conversion frequency with higher frequency ripple current phase interleaving process this topology. general rule thumb single-phase regulator when output currents less than required. multiphase switchers, phase every output current required recommended. Multi-phase switchers available configurations from over phases. These regulators have either internal external MOSFET drivers, available with integrated MOSFETs. cost associated with additional MOSFETs magnetics generally lower than cost similar devices with power ratings handle higher currents.
REFERENCE
OSCILLATOR
UGATE1
COMP
CIRCUIT
HALF-BRIDGE DRIVE
LGATE1
CIRCUIT
DROOP SOURCE,
HALF-BRIDGE DRIVE
VOUT UGATE2 COUT
FPGA
PHASE1
CURRENT SENSE AVERAGE
CURRENT SENSE
LGATE2
ISL6563
PHASE2
ISEN
RISEN
Figure Simplified Block Diagram ISL6563 Voltage Current Control Loops Two-Phase Switching Regulator
Outstanding features ISL6563 two-phase controller include programmable codes system regulation accuracy ±1%. droop characteristic, used reduce overshoot undershoot output voltage, easily programmed with single resistor. >60Amp designs, additional phases using ISL6558 Multiphase Synchronous Buck Controller HIP6601A MOSFET Drivers suggested. Intersil large family dual multi-phase controllers. Customers with power requirements that fall within range shown examples this application guide encouraged contact Intersil's applications engineers (www.intersil.com/tsc/) have more experience designing supporting multi-phase designs than those other semiconductor company.
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Intersil Powers Memory
Double Data Rate (DDR) Synchronous Dynamic Random Access Memory (SDRAM) today's memory choice many applications. name implies, SDRAM operates rate double that previous-generation Random Access Memory (RAM). While previous SDRAM allowed memory access clock cycle, SDRAM allows memory accesses cycle. Thus, data handling faster more efficient. addition dramatic increase data rate, memory requires less power because operates from lower source voltage, 2.5V compared 3.3V older SDRAM. utilize memory, special power considerations have addressed. memory requires three highly regulated voltages referred VDDQ, VREF VDDQ main high-current supply. memory termination voltage that half VDDQ (VDDQ/2). VREF low-power reference voltage that tracks half VDDQ which compared, where VREF DDR, VDDQ supply 2.5V produces high current power memory along with clock synthesizer core. Because this, VDDQ supply usually synchronous buck, switching regulator. supply must source sink current data lines. This also best handled synchronous buck regulator since linear regulators standard bucks cannot sink current.
PGOOD
ROCSET
OCSET/SD
RESET
PGOOD
BOOT1
DBOOT1
UGATE1
GNDA
PHASE1
CBOOT1
LOUT1
VDDQ
PVCC1
COUT1
SLEEP
V2_SD
LGATE1
VREF (.5xVDDQ)
VREF_IN VREF
COMP1
PGND1
ISL6530
DBOOT2
BOOT2 UGATE2
RTT1
CBOOT2
PHASE2
RTT2
SRAM
LOUT2 COUT2
RFB1
SENSE1
COMP2
LGATE2
PGND2
RTTN
SENSE2
RFB2
Intersil worked closely with industry chipset makers memory manufacturers Figure Typical Memory Power Solution provide power solutions that supply required voltages along with full range protection features. What's more, Intersil looked opportunities value beyond basic memory power requirements. doing, Intersil offers selection memory power that offer very high integration small packages.
Intersil's Power Supply Solutions Memory
Complete Solutions ISL6530/1 ISL6227 ISL6532/A ISL6534 ISL6539 Single Solutions ISL6520/A ISL6522/A ISL6527/A 4.5V 2.5V 3.3V 12V, 4.5V 12V, 3.3V Small, cost 1%/0.5% regulation External input Comments With VREF output Automatic light/heavy load selection Includes standby LDO, ACPI compliant Includes standby Dual with mode Comments SOIC-8 SOIC-14, QFN-16, TSSOP-14 SOIC-14, QFN-16 SSOP-28 QFN-20/28 TSSOP-24, QFN-32 SSOP-28 Pkg/Pins Pkg/Pins SOIC-24, QFN-32
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Appendix
Power Converter Layout Considerations
Layout very important high frequency switching converter design. With power devices switching efficiently 300kHz higher, resulting current transitions from device another cause voltage spikes across interconnecting impedances parasitic circuit elements. These voltage spikes degrade efficiency, radiate noise into circuit lead device over-voltage stress. Careful component layout printed circuit board design minimizes voltage spikes converters. example, consider turn-off transition MOSFET. Prior turn-off, MOSFET carrying full load current. During turn-off, current stops flowing MOSFET picked lower MOSFET. parasitic inductance switched current path generates large voltage spike during switching interval. Careful component selection, tight layout critical components short wide traces, minimize magnitude voltage spikes. There sets critical components DC-DC converter. switching components most critical because they switch large amounts energy, therefore tend generate large amounts noise. Next small signal components that connect sensitive nodes supply critical bypass current signal coupling. multi-layer printed circuit board recommended. Figure shows connections critical components ISL6530-based converter. Note that capacitors COUT could each represent numerous physical capacitors. Dedicate solid layer, usually middle layer board, ground plane make critical component ground connections with vias this layer. Dedicate another solid layer power plane break this plane into smaller islands common voltage levels. Keep metal runs from PHASE terminals output inductor short. power plane should support input power output power nodes. copper filled polygons bottom circuit layers phase nodes. remaining printed circuit layers small signal wiring. wiring traces from GATE pins MOSFET gates should kept short wide enough easily handle required drive current.
ISL6530
BOOT1
CBOOT1
UGATE1
PHASE1
PHASE1
LOUT1
VDDQ
LGATE1
PGND1
COUT1
COMP1
SENSE1
BOOT2
UGATE2
VDDQ
CBOOT2
PHASE2
LGATE2
PHASE2
LOUT2
LOAD
COUT2
PGND2
COMP1
switching components should placed close controller (ISL6530 Figure first. Minimize length connections between input capacitors, power switches placing them nearby. SENSE2 Position both ceramic bulk input capacitors close upper MOSFET drain possible. Place output inductor output capaciKEY tors between upper MOSFET load. critical small signal ISLAND POWER PLANE LAYER components include bypass capacitors, feedback components, ISLAND CIRCUIT PLANE LAYER compensation components. Position bypass capacitor, close CONNECTION GROUND PLANE with directly ground plane. Place controller compensation components close COMP pins. feedback resistors both regulators should also located close possible Figure Switching Power Supply Layout relevant with vias tied straight ground plane required. Recommendations Using
ISL6530 Example
LOAD
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Appendix
Power/Current Requirements Xilinx Devices
Virtex-II
Device XC2VP2 XC2VP4 XC2VP7 XC2VP20 XC2VP30 XC2VP40 XC2VP50 XC2VP70 XC2VP100 XC2VP125
Notes:
VCCINT
VCCO
VCCAUX
Slices 1,408 3,008 4,928 9,280 13,696 19,392 23,616 33,088 44,096 55,616
Max. 1,164 1,200
Block
LUTs 2,816 6,016 9,856 18,560 27,392 38,784 47,232 66,176 88,192 111,232
Rocket I/Os
ICCINT 450MHz 13.7 20.1 28.5 35.1 49.5 66.2 83.4
ICCINT 200MHz 13.2 16.3 22.8 30.4 38.2
ICCO 200MHz 0.58 0.98 1.12 1.59 1.81 2.27 2.40 2.81 3.28 3.38
0.49 0.49 0.81 0.81 0.81 1.14 1.46 1.79 1.79 2.11
ICCAUXTX+ +CCTX+ CCRX 0.65 0.65 1.25 1.25 1.25 1.88 2.50 3.13 3.13 3.75
Routing: Medium; Toggle Rate: 12%; Port Width: Read/Write Output Enable Rate: 100%; Registers: DDR; Avg. Output load: 35pF; Rocket I/O: 450MHz; I/O: LVCMOS25_12 (Default Power Estimator)
Spartan-3
VCCINT VCCO VCCAUX Slices 1,920 3,584 7,680 13,312 20,480 27,648 33,280 Max. Block ICCINT LUTs 1,536 3,840 7,168 15,360 26,624 40,960 55,296 66,560 325MHz 15.3 17.6 ICCINT 150MHz ICCO 150MHz 0.26 0.37 0.56 0.83 1.03 1.19 1.51 1.66 ICCAUX (mA)
Device XC3S50 XC3S200 XC3S400 XC3S1000 XC3S1500 XC3S2000 XC3S4000 XC3S5000
Notes:
Routing: Medium; Toggle Rate: 12%; Port Width: Read/Write 50%; Output Enable Rate: 100%; Registers: DDR; Avg. Output load: 35pF; I/O: LVCMOS25_12 (Default Power Estimator)
Virtex-II
VCCINT VCCAU VCCO Slices 1536 3072 5120 7680 10752 14336 23040 33792 46592 Max. 1104 1108 Block LUTs 1024 3072 6144 10240 15360 21504 28672 46080 67584 93184 Multiplier Block ICCINT 450MHz 1.15 2.14 6.14 9.87 14.6 20.5 27.3 39.8 60.2 84.5 112.4 ICCAUX (mA) ICCO 450MHz 0.25 0.31 0.46 0.58 0.91 1.28 1.85 2.25 2.25 ICCINT 100MHz (mA) 1151 1804 2585 3566 4758 6971 10454 14528 19272 ICCO 100MHz (mA)
Device XC2V40 XC2V80 XC2V250 XC2V500 XC2V1000 XC2V1500 XC2V2000 XC2V3000 XC2V4000 XC2V6000 XC2V8000
1024 3072 6144 10240 15360 21504 28672 46080 67584 93184
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Power Typical Microprocessor-based System
Power
HIP6301/HIP6601B HIP6302/HIP6602B ISL6402 ISL6406 ISL6558/HIP6601B ISL6560/HIP6602B ISL6559/HIP6602B ISL6569/HIP6602B ISL6556A/B, ISL6605 ISL6561, ISL6605 ISL6563 ISL6563A/B
DRAM Microprocessor
DDRAM Power
Core Term.
ISL6520 ISL6520A/B ISL6522 ISL6530/31 ISL6532 ISL6532A/32B ISL6534 ISL6224 ISL6227A/26 IPM6210A
System Power Control
Power Sequencing
ISL6123 ISL6124 ISL6125 ISL6126 ISL6127 ISL6128 HIP1020
Supervisory
ISL6131 ISL6132 ICL7665S ISL6536 ISL6550
ORing Control
ISL6144
FGPA/ASIC Power
ISL6521 ISL6227 ISL6520 ISL6526 EL7556 ISL6558 ISL6410/A
ISL6529 ISL6539 HIP6012 HIP6601BE ISL6522A ISL6563 EL7558B EL7536 EL7562 EL7554
FPGA/ASIC/ ASSPs
Pluggable Expansion
Swap Protection
ISL6111 HIP1011 HIP1011D ISL6118 HIP1012A ISL6161 ISL6115/16
Interface
ISL6119 EL7551 EL7512
Control
Cont. Power
Core
ISL6520 HIP6012 EL7551 EL7562 EL7564
Battery Management
ISL6291 ISL6292 ISL6293 ISL6295 ICL7673
Peripheral Power
ACPI General Control Purpose
HIP6501A HIP6502B HIP6503 ISL6504 ISL6505 ISL6521 ISL6227 ISL6401 ISL6402 ISL6406 ISL6439 ISL6522 ISL6526 ISL6528
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Printed 2/04 AG0001.4
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Power Management Application Guide Xilinx FPGAs Using Switchers P

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