Power Management Application Guide Altera FPGAs Using Switchers P

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Power Management Application Guide Altera FPGAs
Using Switchers Power Altera FPGAs Memory
Increased gate counts higher clock speeds FPGAs have resulted higher current requirements while smaller device geometries mean 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. These challenges very similar what computer motherboard makers have faced peripheral power been driven upward, transients have risen dramatically, sequencing become mandatory.
DC-DC Converter(s)
VI/O1 VI/O2 VCORE
Memory Power
VDDQ
FPGA
Memory
Inside:
Intersil's Recommended Power Supply Solutions Including Schematics BOMs Selection Tables Altera FPGA Power Tables Memory Power Solutions Supervisory Circuits Layout Considerations
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Selecting Power Supply FPGA-Based Systems
This Application Guide offers customers ways select best Intersil Power Supply solution FPGAbased systems: Selection number supplies needed (below) Selection Altera device being used supply voltages available (Page Tables StratixTM, Stratix CycloneTM) Also included this Application Guide: Power supply solutions diagrams Bill-of-Materials (Pages 4-8) Supply supervisory sequencing (Page Power solutions powering memory (Page Appendix Layout Considerations Power Supply (Page
Selecting Power Supply Number Supplies Needed
Three Four
20Amps ISL6521 Synchronous Buck Linears (Option Pages 4-5)
Smallest Size ISL6528 Standard Buck Linear (Option Page Highest Efficiency ISL6539 Dual Synchronous Buck (Table Page +24V ISL6227 Dual Synchronous Buck (Table 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 (Table Page
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Intersil's Recommended Power Supply Solutions
Stratix
Peak ICCINT Current Requirement Device EP1S10 EP1S20 EP1S25 EP1S30 EP1S40 EP1S60 EP1S80 300MHz 11.2 13.8 150MHz ISL6521 ISL6539 ISL6526 ISL6521, EL75XX Family, ISL6528 Recommended Intersil Power Solutions VIN=+5V VIN=+3.3V EL75XX Family ISL6526
Stratix
Peak ICCINT Current Requirement Device EP1SGX10D EP1SGX25F EP1SGX40G 300MHz 200MHz Recommended Intersil Power Solutions VIN=+5V ISL6521, EL75XX Family, ISL6528 VIN=+3.3V EL75XX Family ISL6526
Cyclone
Peak Current @350MHz Device EP1C3 EP1C4 EP1C6 EP1C12 EP1C20 ICCINT ICCIO ISL6521, EL75XX Family, ISL6528 EL75XX Family ISL6526 Recommended Intersil Power Solutions VIN=+5V VIN=+3.3V
ISL6410/A, EL7536 EL7562
Typical Field Programmable Gate Array Power Requirements
flexibility FPGAs leads requirement multiple supply voltages currents. Core Voltage Power large FPGAs, either logic core Input/Output (I/O) most demanding current requirements, >10Amps depending number gates being used clock frequency. Designated VCCINT Altera. Stratix, Stratix Cyclone require 1.5V. Voltage Power Designated VCCIO equal 1.5V, 1.8V, 2.5V 3.3V depending standard selected. standards independently block FPGA, more than voltage single FPGA possible. Memory: Memory very specific power requirements, typically 2.5V VDDQ VDDQ (1.25V) VTT. Page
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Four Output Voltages
Option ISL6521 Switcher VCCINT Linear Regulators VCCIO1, VCCIO2, VCCIO3.
Multi-output 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 Altera FPGAs (for example Stratix Stratix 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. ICCIO currents less than 120mA supplied directly from linear regulator drive pins shown here VCCIO2) they used control external transistor shown here VCCIO1 VCCIO3). complete application note utilizing ISL6521, including suggested board layout available http://www. complete data sheet available asp?pn=ISL6521. Simulation tools also available http://www.intersil.com/isim/.
+5VIN
0.1µF
MA732
ISL6521
BOOT
OCSET
VCCIO1 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
FPGA
VCCIO2 3.3V/120mA
100µF
10µF
DRIVE3
Switching Regulator
PGND
Linear Regulator
COMP
2.0k
18.2k
5.9k
DRIVE4
VCCIO3
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 ICCINT 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
Smallest Size, Output Voltages
Option ISL6528 8-pin, Cost Switcher VCCINT Linear Regulator VCCIO
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. VCCIO supplied linear regulator using external transistor minimize heat dissipated ISL6528. VCCINT VCCIO voltages both resistor dividers ground. This configuration applicable VCCINT from 0.8V 3.3V approximately 15A, VCCIO 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
VCCIO (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 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. Protection from overcurrent conditions provided 3.3V monitoring rDS(ON) upper MOSFET inhibit operation appropriately. This approach simplifies C5-7 implementation improves OCSET efficiency eliminating need current sense resistor. CPVOUT Additionally, design optimized ISL6526 given ISL6526 BOOT CPGND evaluation board available UGATE 1.5V VOUT PHASE an1021.pdf.
C10-12 LGATE complete application note COMP utilizing ISL6526, including suggested board layout available http://www. intersil.com/data/an/an1021. pdf. complete data sheet available http://www. asp?pn=ISL6526. Figure ISL6526-Based, Synchronous-Buck Solution
FPGA
ENABLE
ENABLE
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 T50-52B 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)
Vendor
Rubycon Intersil Vishay
Series ISL6526 Si7840DP
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Intersil's Recommended Power Supply Solutions
Intersil Switchers Powering Altera 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
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
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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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.
Appendix
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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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
Intersil recognized global leader power management solutions, offering broad portfolio products that will simplify your power designs. Intersil's Endura family power management products ranges from building blocks such charge pumps highly integrated multiple output multiphase PWMs dual voltage swap controllers. leading supplier controller with over million shipped, Intersil meet your power needs provide following benefits your designs: Superior technical support Reference designs evaluation boards Unprecedented performance reliability High efficiency Complete system monitoring protection (reduces need many external components) Industry wide adoption compatibility
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Power Management Application Guide Altera FPGAs Using Switchers P

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