DC/DC regulator Input 3.0 - 5.5 V Output 10 A
Transcript of DC/DC regulator Input 3.0 - 5.5 V Output 10 A
Key Features • Wideinput,3.0-5.5Vdc
• Programmableoutput,0.75-3.6Vdc
• Undervoltageprotection
• Shortcircuitprotection
• Remotesense
• RemoteOn/Off
• DesignforEnvironment(DfE)
• EuropeanCommissionDirective2002/95/EC(RoHs)compliant
E Datasheet
DC/DCregulatorInput3.0-5.5VOutput10A
PMB4418TWP
ThePMBseriesofSILDC/DCregulators(POL)areintendedtobeusedaslocaldistributedpowersourcesindistributedpowerarchitecturelevel4.Thesinglein-linedesignmakesthePMBseriessuit-ableforapplicationswhereboardspaceislimited.ThehighefficiencyandhighreliabilityofthePMBseriesmakesthemparticularlysuitedforthecom-municationsequipmentoftodayandtomorrow.
Theseproductsaremanufacturedusingthemostadvancedtechnologiesandmaterialstocomplywithenvironmentalrequirements.Designedtomeethighreliabilityrequirementsofsystemsmanufacturers,thePMBrespondstoworld-classspecifications.EricssonPowerModulesisanISO9001/14001certifiedsupplier.
ContentsProductProgram. . . . . . . . . . . . . . . . . . . . . . 2MechanicalData. . . . . . . . . . . . . . . . . . . . . . 2Connections . . . . . . . . . . . . . . . . . . . . . . . . . 3AbsoluteMaximumRatings . . . . . . . . . . . . . 3Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3ProductQualificationSpecification. . . . . . . . 4SafetySpecification . . . . . . . . . . . . . . . . . . . 5Adjustedto1.0Vout-Data. . . . . . . . . . . . . 6Adjustedto1.2Vout-Data. . . . . . . . . . . . . 9Adjustedto1.5Vout-Data. . . . . . . . . . . . 12Adjustedto1.8Vout-Data. . . . . . . . . . . . 15Adjustedto2.5Vout-Data. . . . . . . . . . . . 18Adjustedto3.3Vout-Data. . . . . . . . . . . . 21EMCSpecification. . . . . . . . . . . . . . . . . . . . 24OperatingInformation. . . . . . . . . . . . . . . . . 24ThermalConsiderations . . . . . . . . . . . . . . . 27SolderingInformation. . . . . . . . . . . . . . . . . 28DeliveryPackageInformation. . . . . . . . . . . 28Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . 28CompatibilitywithRoHSrequirements. . . . 28SalesOfficesandContactInformation. . . . 29
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
8,80[0.346]
7,40[0.291]
51,80 [2.039]
48,26 [1.900]
Recommended footprint (customer board), no components within border.Holes: Ø1,0 [0.04] through plated holes with Ø1,5 [0.06] pads on both sides.
Note 1: For other pin lengths, refer to Product program/Ordering information
1 2 3 4 5 6 7 8 9 10
Dimensions in mm [inch]
Tolerances (unless specified):x,x +/-0,5 [0.02]x,xx +/-0,25 [0.01]
E
7,0 [0.27]
8,5 [0.33] max
choke
35,56 [1.400]
48,26 [1.900]
2,54 [0.100] (7x) (1,27 [0.05])
13,20[0.520]
50,8 [2.00]
pinlength3,60[0.142]
(Note1)
1
1
Mechanical Data
Product Program
Delivery option M.o.q. Suffix Example
Tray 100pcs /B PMB4xxxxWP/B
Ordering Information
VIVO/IOmax
POmax OrderingNo. CommentOutput1
3.0-5.5V* 0.8-3.6V/10A 33W PMB4418TWP Standardversion
3.0-5.5V 1.0V/10A 10W PMB4118NWP Onrequest
3.0-5.5V 1.2V/10A 12W PMB4118LWP Onrequest
3.0-5.5V 1.5V/10A 15W PMB4118HWP Released
3.0-5.5V 1.8V/10A 18W PMB4118GWP Released
3.0-5.5V 2.5V/10A 25W PMB4219WP Released
3.8-5.5V 3.3V/10A 33W PMB4310WP Released
*Inputvoltagelimitedto3.8-5.5Vfor3.3Voutandforoutputvoltagesof3.3Vand4.5-5.5foroutputvoltagesabove3.3V.
Option Suffix Example
PositiveRemoteControllogic P PMB4418TWPP
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Characteristics min typ max Unit
Tref OperatingReferenceTemperature,seepg.27 -45 +115 ˚C
TS Storagetemperature -55 +125 ˚C
VI Inputvoltage -0.3 +5.5 Vdc
Characteristics Conditions min typ max Unit
VI Inputvoltagerange 3.0 5.5 Vdc
VIoff Turn-offinputvoltage
Rampfromhighervoltage,Voutsetto1.0-1.8V 1.9
VdcRampfromhighervoltage,Voutsetto2.5V 2.5
Rampfromhighervoltage,Voutsetto3.3V 3.5
VIon Turn-oninputvoltage
Rampfromlowervoltage,Voutsetto1.0-1.8V 2.1
VdcRampfromlowervoltage,Voutsetto2.5V 2.7
Rampfromlowervoltage,Voutsetto3.3V 3.6
CI Inputcapacitance 20 µF
PIi Inputidlingpower Io=0A,VI=5V 590 mW
PRC Inputstand-bypower(RCactive) Nonoperation,VI=5V 7.5 mW
VIac Inputripple1) 20Hz...5MHz,Iomax,VI=5V 400 mV
Input
StressinexcessofAbsoluteMaximumRatingsmaycausepermanentdamage.
AbsoluteMaximumRatings,sometimesreferredtoasnodestructionlimits,are
normallytestedwithoneparameteratatimeexceedingthelimitsofOutputdata
orElectricalCharacteristics.Ifexposedtostressabovetheselimits,functionand
performancemaydegradeinanunspecifiedmanner.
Absolute Maximum Ratings
Tref = -30 ... +90 ˚C, VI=3.0...5.5VunlessotherwisespecifiedTypvaluesspecifiedat:Tref = +25 ˚C, VInom,Iomax=10A
1)Measuredwith2x22µFceramiccapacitors
Connections Weight7.7g
Pin Designation Function
1 +Out Positiveoutput
2 +Out Positiveoutput
3 +Sense Positivesense
4 +Out Positiveoutput
5 GND Ground
6 GND Ground
7 +In Positiveinput
8 +In Positiveinput
9 Vadj Outputvoltageadjust
10 RC Remotecontrol
PinsMaterial:CopperalloyPlating:Mattetinovernickel
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Characteristics
RandomVibration IEC60068-2-64FrequencyAccelerationdensity
5...500Hz0.5g2/Hz
Mechanicalshock(halfsinus)
IEC60068-2-27PeakaccelerationDuration
50g11ms
Leadintegrity IEC60068-2-21Ub Simultaneousbending Allleads
Temperaturecycling JESD22-A104-BGTemperatureNumberofcycles
-40 ... +125 ˚C300
Accelerateddampheat JESD22-A101-B
TemperatureHumidityDurationBias
+85 ˚C85%RH1000hoursmaxinputvoltage
SolderabilityIEC60068-2-54(AgedaccordingtoJESD22-A101-B,240hnobias)
SolderimmersiondepthTimeforonsetofwettingWettingforce
2mm<2.5s>200mN/m
Cold(inoperation) IEC60068-2-1TemperatureDuration
-45 ˚C72h
Hightemperaturestorage JESD22-A103-BATemperatureDuration
+125 ˚C1000h
Product Qualification Specification
Fundamental Circuit Diagram
GNDGND
PWM
+IN +OUT
+SENSE
Vadj
controller
Ref
GND
Erroramplifier
RC RC
GND
Block
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
EricssonPowerModulesDC/DCconvertersandDC/DCregulatorsaredesignedinaccordancewithsafetystandardsIEC/EN/UL60950, Safety of Information Technology Equipment.
IEC/EN/UL60950containsrequirementstopreventinjuryordamageduetothefollowinghazards:•Electrical shock •Energy hazards •Fire •Mechanical and heat hazards •Radiation hazards •Chemical hazards
On-boardDC-DCconvertersaredefinedascomponentpowersupplies.AscomponentstheycannotfullycomplywiththeprovisionsofanySafetyrequirementswithout“ConditionsofAcceptability”.ItistheresponsibilityoftheinstallertoensurethatthefinalproducthousingthesecomponentscomplieswiththerequirementsofallapplicableSafetystandardsandDirectivesforthefinalproduct.
ComponentpowersuppliesforgeneraluseshouldcomplywiththerequirementsinIEC60950,EN60950andUL60950“Safetyofinformationtechnologyequipment”.
Thereareothermoreproductrelatedstandards,e.g.IEC61204-7“Safetystandardforpowersupplies",IEEE802.3af“EthernetLAN/MANDataterminalequipmentpower”,andETS300132-2“Powersupplyinterfaceattheinputtotelecommunicationsequipment;part2:DC”,butallofthesestandardsarebasedonIEC/EN/UL60950withregardstosafety.
EricssonPowerModulesDC/DCconvertersandDC/DCregulatorsareUL60950recognizedandcertifiedinaccordancewithEN60950.
TheflammabilityratingforallconstructionpartsoftheproductsmeetsUL94V-0.
Theproductsshouldbeinstalledintheend-useequipment,inaccordancewiththerequirementsoftheultimateapplication.NormallytheoutputoftheDC/DCconverterisconsideredasSELV(SafetyExtraLowVoltage)andtheinputsourcemustbeisolatedbyminimumDoubleorReinforcedInsulationfromtheprimarycircuit(ACmains)inaccordancewithIEC/EN/UL60950.
Safety Specification
IsolatedDC/DCconverters.
TheinputvoltagetotheDC/DCregulatorisSELV(SafetyExtraLowVoltage)andtheoutputremainsSELVundernormalandabnormaloperatingconditions.
ItisrecommendedthataslowblowfusewitharatingtwicethemaximuminputcurrentperselectedproductbeusedattheinputofeachDC/DCregulator.
Non-isolatedDC/DCregulators.
24Vdcsystems.TheinputvoltagetotheDC/DCconverterisSELV(SafetyExtraLowVoltage)andtheoutputremainsSELVundernormalandabnormaloperatingconditions.
48and60Vdcsystems.IftheinputvoltagetoEricssonPowerModulesDC/DCconverteris75Vdcorless,thentheoutputremainsSELV(SafetyExtraLowVoltage)undernormalandabnormaloperatingconditions.SinglefaulttestingintheinputpowersupplycircuitshouldbeperformedwiththeDC/DCconverterconnectedtodemonstratethattheinputvoltagedoesnotexceed75Vdc.
IftheinputpowersourcecircuitisaDCpowersystem,thesourcemaybetreatedasaTNV2circuitandtestinghasdemonstratedcompliancewithSELVlimitsandisolationrequirementsequivalenttoBasicInsulationinaccordancewithIEC/EN/UL60950.
ItisrecommendedthatafastblowfusewitharatingtwicethemaximuminputcurrentperselectedproductbeusedattheinputofeachDC/DCconverter.Ifaninputfilterisusedinthecircuitthefuseshouldbeplacedinfrontoftheinputfilter.IntherareeventofacomponentproblemintheinputfilterorintheDC/DCconverterthatimposesashortcircuitontheinputsource,thisfusewillprovidethefollowingfunctions:
•IsolatethefaultyDC/DCconverterfromtheinputpowersourcesoasnottoaffecttheoperationofotherpartsofthesystem.
•Protectthedistributionwiringfromexcessivecurrentandpowerlossthuspreventinghazardousoverheating.
Thegalvanicisolationisverifiedinanelectricstrengthtest.Thetestvoltage(VISO)betweeninputandoutputis1500Vdcor2250Vdcfor60seconds(refertoproductspecification).Leakagecurrentislessthan1µAatnominalinputvoltage.
Generalinformation.
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Characteristics ConditionsOutput
Unitmin typ max
VOi Outputvoltageadjustedsetting Tref=+25°C,VInom,IOmax,Radj80kΩ 1.00 V
VO
Outputvoltagetoleranceband IO=0.01...1.0xIOmax 0.97 1.03 V
Idlingvoltage IO=0 0.98 1.02 V
Lineregulation VImin...VImax,IOmax 11 mV
Loadregulation IO=0.01...1.0xIOmax,VInom 10 mV
VtrLoadtransientvoltagedeviation
Loadstep=0.25...0.75xIOmax,dI/dt=5A/µs,CO=150µF,VI=3.3V
140 mV
ttr Loadtransientrecoverytime 60 µs
Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.1 0 +0.1 mV/°C
ts Start-uptimeFromVIconnectedtoVO=0.9xVOI,IO=0.1...1.0xIOmax,VInom
8.5 ms
tr Ramp-uptime 0.1...0.9xVO,IO=0.1...1.0xIOmax,VInom 4 ms
tr Falltime,VOx0.1 IO=IOmax,VInom 0.2 ms
tr Falltime,VOx0.1 IO=0A,VInom 5 s
tRCoff RCshut-downtimetoVOx0.1 IO=IOmax,VInom 0.2 ms
tRCon RCstart-uptimetoVOx0.9 IO=IOmax,VInom 8 ms
tRC RCfalltime,VOx0.1...0.9 IO=0A,VInom 10 s
IO Outputcurrent 0 10 A
POmax Maxoutputpower AtVO=VOnom 10 W
Ilim Currentlimitthreshold Tref<Trefmax 15 18 22 A
VOac Outputripple 20Hz...5MHz,IOmax 10 20 mVp-p
η Efficiency-50%load IO=0.5xIOmax,VI=5V 87 %
η Efficiency-100%load IO=IOmax,VI=5V 84 85.8 %
Pd PowerDissipation IO=IOmax,VI=5V 1.6 2.0 W
Fo Switchingfrequency IO=0...1.0xIOmax 250 300 350 kHz
Isense Remotesensecurrent 8 mA
II Staticinputcurrent VI=3.0V,IO=IOmax,Tref=25°C 3.9 A
MTBF Predictedreliability Tref=40°C 6millionhours
Tref=-30...+90°C,VI=3.0...5.5Vunlessotherwisespecified.Inputfilter2x22µF,Outputfilter1x150µFTypvaluesspecifiedat:Tref=+25°CandVInom.IOmax=10A.Note:+Senseconnectedto+Out
Adjusted to 1.0 V out - Data
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Output Current Derating at 5 V input
Start-Up
Outputvoltagevs.loadcurrent.
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=5V.Seeconditionsonpage27.
Start-upatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.StartenabledbyconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Efficiency Power Dissipation
Output Characteristics
Adjusted to 1.0 V out - Typical Characteristics
Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C
Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
Output Current Derating at . V input
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=3.3V.Seeconditionsonpage27.
60 70 80 90 100 110 1200
2
4
6
8
10
12
[°C]
[A]
2.0 m/s (400 lfm)1.5 m/s (300 lfm)1.0 m/s (200 lfm)Nat. Conv.
3.0 m/s (600 lfm) 2.5 m/s (500 lfm)
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Turn Off Output Ripple
Transient with 150 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Transient with 00 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=3.3V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.
Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Adjusted to 1.0 V out - Typical CharacteristicsGeneralconditions:Inputfilter2x22µF,Outputfilter1x150µF
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Tref=-30...+90°C,VI=3.0...5.5Vunlessotherwisespecified.Inputfilter2x22µF,Outputfilter1x150µFTypvaluesspecifiedat:Tref=+25°CandVInom,IOmax=10A.Note:+Senseconnectedto+Out
Adjusted to 1. V out - Data
Characteristics ConditionsOutput
Unitmin typ max
VOi Outputvoltageadjustedsetting Tref=+25°C,VInom,IOmax,Radj42kΩ 1.20 V
VO
Outputvoltagetoleranceband IO=0.01...1.0xIOmax 1.164 1.236 V
Idlingvoltage IO=0 1.18 1.22 V
Lineregulation VImin...VImax,IOmax 11 mV
Loadregulation IO=0.01...1.0xIOmax,VInom 10 mV
VtrLoadtransientvoltagedeviation
Loadstep=0.25...0.75xIOmax,dI/dt=5A/µs,CO=150µF,VI=3.3V
140 mV
ttr Loadtransientrecoverytime 60 µs
Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.1 0 +0.1 mV/°C
ts Start-uptimeFromVIconnectedtoVO=0.9xVOI,IO=0.1...1.0xIOmax,VInom
8.5 ms
tr Ramp-uptime 0.1...0.9xVO,IO=0.1...1.0xIOmax,VInom 4 ms
tr Falltime,VOx0.1 IO=IOmax,VInom 0.2 ms
tr Falltime,VOx0.1 IO=0A,VInom 5 s
tRCoff RCshut-downtimetoVOx0.1 IO=IOmax,VInom 0.2 ms
tRCon RCstart-uptimetoVOx0.9 IO=IOmax,VInom 8 ms
tRC RCfalltime,VOx0.1...0.9 IO=0A,VInom 5 s
IO Outputcurrent 0 10 A
POmax Maxoutputpower AtVO=VOnom 12 W
Ilim Currentlimitthreshold Tref<Trefmax 15 18 22 A
VOac Outputripple 20Hz...5MHz,IOmax 10 20 mVp-p
η Efficiency-50%load IO=0.5xIOmax,VI=5V 89.2 %
η Efficiency-100%load IO=IOmax,VI=5V 85 87.5 %
Pd PowerDissipation IO=IOmax,VI=5V 1.7 2.1 W
Fo Switchingfrequency IO=0...1.0xIOmax 250 300 350 kHz
Isense Remotesensecurrent 8 mA
II Staticinputcurrent VI=3.0V,IO=IOmax,Tref=25°C 4.6 A
MTBF Predictedreliability Tref=40°C 6millionhours
10 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Output Current Derating at 5 V input
Output Characteristic Start-Up
Outputvoltagevs.loadcurrent.
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=5V.Seeconditionsonpage27.
Start-upatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.StartenabledbyconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Efficiency Power Dissipation
Adjusted to 1. V - Typical Characteristics
Efficiencyvs.loadcurrentandinputvoltageatTre=+25°C
Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
Output Current Derating at . V input
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=3.3V.Seeconditionsonpage27.
60 70 80 90 100 110 1200
2
4
6
8
10
12
[°C]
[A]
2.0 m/s (400 lfm)1.5 m/s (300 lfm)1.0 m/s (200 lfm)Nat. Conv.
3.0 m/s (600 lfm) 2.5 m/s (500 lfm)
11 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Turn Off Output Ripple
Transient with 150 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Transient with 00 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=3.3V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.
Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Adjusted to 1. V - Typical CharacteristicsGeneralconditions:Inputfilter2x22µF,Outputfilter1x150µF
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Characteristics ConditionsOutput
Unitmin typ max
VOi Outputvoltageadjustedsetting Tref=+25°C,VInom,IOmax,Radj23kΩ 1.5 V
VO
Outputvoltagetoleranceband IO=0.01...1.0xIOmax 1.445 1.545 V
Idlingvoltage IO=0 1.48 1.52 V
Lineregulation VImin...VImax,IOmax 11 mV
Loadregulation IO=0.01...1.0xIOmax,VInom 10 mV
VtrLoadtransientvoltagedeviation
Loadstep=0.25...0.75xIOmax,dI/dt=5A/µs,CO=150µF,VI=3.3V
100 mV
ttr Loadtransientrecoverytime 60 µs
Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.1 0 +0.1 mV/°C
ts Start-uptimeFromVIconnectedtoVO=0.9xVOI,IO=0.1...1.0xIOmax,VInom
8.5 ms
tr Ramp-uptime 0.1...0.9xVO,IO=0.1...1.0xIOmax,VInom 4 ms
tr Falltime,VOx0.1 IO=IOmax,VInom 0.2 ms
tr Falltime,VOx0.1 IO=0A,VInom 5 s
tRCoff RCshut-downtimetoVOx0.1 IO=IOmax,VInom 0.2 ms
tRCon RCstart-uptimetoVOx0.9 IO=IOmax,VInom 8 ms
tRC RCfalltime,VOx0.1...0.9 IO=0A,VInom 5 s
IO Outputcurrent 0 10 A
POmax Maxoutputpower AtVO=VOnom 15 W
Ilim Currentlimitthreshold Tref<Trefmax 15 18 22 A
VOac Outputripple 20Hz...5MHz,IOmax 15 25 mVp-p
η Efficiency-50%load IO=0.5xIOmax,VI=5V 90 %
η Efficiency-100%load IO=IOmax,VI=5V 87 89.5 %
Pd PowerDissipation IO=IOmax,VI=5V 1.8 2.3 W
Fo Switchingfrequency IO=0...1.0xIOmax 250 300 350 kHz
Isense Remotesensecurrent 8 mA
II Staticinputcurrent VI=3.0V,IO=IOmax,Tref=25°C 6 A
MTBF Predictedreliability Tref=40°C 6millionhours
Tref=-30...+90°C,VI=3.0...5.5Vunlessotherwisespecified.Inputfilter2x22µF,Outputfilter1x150µFTypvaluesspecifiedat:Tref=+25°CandVInom.IOmax=10A.Note:+Senseconnectedto+Out
Adjusted to 1.5 V out - Data
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Output Current Derating at 5 V input
Output Characteristic Start-Up
Outputvoltagevs.loadcurrent.
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=5V.Seeconditionsonpage27.
Start-upatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.StartenabledbyconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Efficiency Power Dissipation
Adjusted to 1.5V out - Typical Characteristics
Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C
Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
Output Current Derating at . V input
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=3.3V.Seeconditionsonpage27.
60 70 80 90 100 110 1200
2
4
6
8
10
12
[°C]
[A]
2.0 m/s (400 lfm)1.5 m/s (300 lfm)1.0 m/s (200 lfm)Nat. Conv.
3.0 m/s (600 lfm) 2.5 m/s (500 lfm)
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Turn Off Output Ripple
Transient with 150 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Transient with 00 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=3.3V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.
Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Adjusted to 1.5V out - Typical CharacteristicsGeneralconditions:Inputfilter2x22µF,Outputfilter1x150µF
15 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Tref=–30…+90°C,VI=3.0...5.5Vunlessotherwisespecified.Inputfilter2x22µF,Outputfilter1x150µFTypvaluesspecifiedat:Tref=+25°CandVInom.IOmax=10A.Note:+Senseconnectedto+Out
Adjusted to 1. V out - Data
Characteristics ConditionsOutput
Unitmin typ max
VOi Outputvoltageadjustedsetting Tref=+25°C,VInom,IOmax,Radj15kΩ 1.80 V
VO
Outputvoltagetoleranceband IO=0.01...1.0xIOmax 1.746 1.854 V
Idlingvoltage IO=0 1.78 1.82 V
Lineregulation VImin...VImax,IOmax 11 mV
Loadregulation IO=0.01...1.0xIOmax,VInom 10 mV
VtrLoadtransientvoltagedeviation
Loadstep=0.25...0.75xIOmax,dI/dt=5A/µs,CO=150µF,VI=3.3V
120 mV
ttr Loadtransientrecoverytime 60 µs
Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.1 0 +0.1 mV/°C
ts Start-uptimeFromVIconnectedtoVO=0.9xVOI,IO=0.1...1.0xIOmax,VInom
8.5 ms
tr Ramp-uptime 0.1...0.9xVO,IO=0.1...1.0xIOmax,VInom 4 ms
tr Falltime,VOx0.1 IO=IOmax,VInom 0.2 ms
tr Falltime,VOx0.1 IO=0A,VInom 5 s
tRCoff RCshut-downtimetoVOx0.1 IO=IOmax,VInom 0.2 ms
tRCon RCstart-uptimetoVOx0.9 IO=IOmax,VInom 8 ms
tRC RCfalltime,VOx0.1...0.9 IO=0A,VInom 5 s
IO Outputcurrent 0 10 A
POmax Maxoutputpower AtVO=VOnom 18 W
Ilim Currentlimitthreshold Tref<Trefmax 15 18 22 A
VOac Outputripple 20Hz...5MHz,IOmax 15 25 mVp-p
η Efficiency-50%load IO=0.5xIOmax,VI=5V 91 %
η Efficiency-100%load IO=IOmax,VI=5V 89.5 91.1 %
Pd PowerDissipation IO=IOmax,VI=5V 1.8 2.2 W
Fo Switchingfrequency IO=0...1.0xIOmax 250 300 350 kHz
Isense Remotesensecurrent 8 mA
II Staticinputcurrent VI=3.0V,IO=IOmax,Tref=25°C 6.6 A
MTBF Predictedreliability Tref=40°C 6millionhours
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Efficiency
Output Current Derating at . V input Output Current Derating at 5 V input
Adjusted to 1. V - Typical Characteristics
Output Characteristic Start-Up
Outputvoltagevs.loadcurrent.
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=5V.Seeconditionsonpage27.
Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C
Start-upatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.StartenabledbyconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=3.3V.Seeconditionsonpage27.
Power Dissipation
Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C
60 70 80 90 100 110 1200
2
4
6
8
10
12
[°C]
[A]
2.0 m/s (400 lfm)1.5 m/s (300 lfm)1.0 m/s (200 lfm)Nat. Conv.
3.0 m/s (600 lfm) 2.5 m/s (500 lfm)
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Turn Off Output Ripple
Adjusted to 1. V out - Typical Characteristics
Transient with 150 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Transient with 00 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=3.3V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.
Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(0.5V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2.0ms/div.
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Characteristics ConditionsOutput
Unitmin typ max
VOi Outputvoltageadjustedsetting Tref=+25°C,VInom,IOmax,Radj7kΩ 2.5 V
VO
Outputvoltagetoleranceband IO=0.01...1.0xIOmax 2.425 2.575 V
Idlingvoltage IO=0 2.48 2.52 V
Lineregulation VImin...VImax,IOmax 11 mV
Loadregulation IO=0.01...1.0xIOmax,VInom 10 mV
VtrLoadtransientvoltagedeviation
Loadstep=0.25...0.75xIOmax,dI/dt=5A/µs,CO=150µF,VI=3.3V
120 mV
ttr Loadtransientrecoverytime 60 µs
Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.1 0 +0.1 mV/°C
ts Start-uptimeFromVIconnectedtoVO=0.9xVOI,IO=0.1...1.0xIOmax,VInom
8.5 ms
tr Ramp-uptime 0.1...0.9xVO,IO=0.1...1.0xIOmax,VInom 4 ms
tr Falltime,VOx0.1 IO=IOmax,VInom 0.2 ms
tr Falltime,VOx0.1 IO=0A,VInom 5 s
tRCoff RCshut-downtimetoVOx0.1 IO=IOmax,VInom 0.2 ms
tRCon RCstart-uptimetoVOx0.9 IO=IOmax,VInom 8 ms
tRC RCfalltime,VOx0.1...0.9 IO=0A,VInom 5 s
IO Outputcurrent 0 10 A
POmax Maxoutputpower AtVO=VOnom 25 W
Ilim Currentlimitthreshold Tref<Trefmax 15 18 22 A
VOac Outputripple 20Hz...5MHz,IOmax 20 30 mVp-p
η Efficiency-50%load IO=0.5xIOmax,VI=5V 93.8 %
η Efficiency-100%load IO=IOmax,VI=5V 92 93.5 %
Pd PowerDissipation IO=IOmax,VI=5V 1.8 2.3 W
Fo Switchingfrequency IO=0...1.0xIOmax 250 300 350 kHz
Isense Remotesensecurrent 8 mA
II Staticinputcurrent VI=3.0V,IO=IOmax,Tref=25°C 9.0 A
MTBF Predictedreliability Tref=40°C 6millionhours
Tref=-30...+90°C,VI=3.0...5.5Vunlessotherwisespecified.Inputfilter2x22µF,Outputfilter1x150µFTypvaluesspecifiedat:Tref=+25°CandVInom.IOmax=10A.Note:+Senseconnectedto+Out
Adjusted to .5 V out - Data
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Output Current Derating at 5 V input
Output Characteristic Start-Up
Outputvoltagevs.loadcurrent.
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=5V.Seeconditionsonpage27.
Start-upatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.StartenabledbyconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2ms/div.
Efficiency Power Dissipation
Adjusted to .5 V out - Typical Characteristics
Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C
Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
Output Current Derating at . V input
Availableloadcurrentvs.ambientairtemperatureandairflowatVin=3.3V.Seeconditionsonpage27.
60 70 80 90 100 110 1200
2
4
6
8
10
12
[°C]
[A]
2.0 m/s (400 lfm)1.5 m/s (300 lfm)1.0 m/s (200 lfm)Nat. Conv.
3.0 m/s (600 lfm) 2.5 m/s (500 lfm)
0 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Turn Off Output Ripple
Transient with 150 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Transient with 00 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=3.3V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=3.3V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.
Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=3.3V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2ms/div.
Adjusted to .5 V out - Typical CharacteristicsGeneralconditions:Inputfilter2x22µF,Outputfilter1x150µF
1 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Tref=-30...+90°C,VI=3.8...5.5Vunlessotherwisespecified.Inputfilter2x22µF,Outputfilter1x150µFTypvaluesspecifiedat:Tref=+25°CandVI=5.0V.IOmax=10A.Note:+Senseconnectedto+Out
Adjusted to . V out - Data
Characteristics ConditionsOutput
Unitmin typ max
VOi Outputvoltageadjustedsetting Tref=+25°C,VI>3.8V,IOmax,Radj3.1kΩ 3.3 V
VO
Outputvoltagetoleranceband IO=0.1...1.0xIOmax 3.201 3.399 V
Idlingvoltage IO=0 3.28 3.32 V
Lineregulation VI=5V...VImax,IOmax 11 mV
Loadregulation IO=0.01...1.0xIOmax,VI=5V 10 mV
VtrLoadtransientvoltagedeviation
Loadstep=0.25...0.75xIOmax,dI/dt=5A/µs,CO=150µF,VI=5V
120 mV
ttr Loadtransientrecoverytime 60 µs
Tcoeff Temperaturecoefficient Tref=-30...+90°C,IOmax -0.1 0 +0.1 mV/°C
ts Start-uptimeFromVIconnectedtoVO=0.9xVOadj,IO=0.1...1.0xIOmax,VI=5V
8.5 ms
tr Ramp-uptime0.1...0.9xVO,IO=0.1...1.0xIOmax,VI=5V
4 ms
tr Falltime,VOx0.1 IO=IOmax,VI=5V 0.2 ms
tr Falltime,VOx0.1 IO=0A,VI=5V 5 s
tRCoff RCshut-downtimetoVOx0.1 IO=IOmax,VI=5V 0.2 ms
tRCon RCstart-uptimetoVOx0.9 IO=IOmax,VI=5V 8 ms
tRC RCfalltime,VOx0.1...0.9 IO=0A,VI=5V 5 s
IO Outputcurrent 0 10 A
POmax Maxoutputpower AtVO=VOnom 33 W
Ilim Currentlimitthreshold Tref<Trefmax 15 18 22 A
VOac Outputripple 20Hz...5MHz,IOmax 20 30 mVp-p
η Efficiency-50%load IO=0.5xIOmax,VI=5V 95.5 %
η Efficiency-100%load IO=IOmax,VI=5V 93.5 95.0 %
Pd PowerDissipation IO=IOmax,VI=5V 1.8 2.3 W
Fo Switchingfrequency IO=0...1.0xIOmax 250 300 350 kHz
Isense Remotesensecurrent 8 mA
II Staticinputcurrent VI=3.8V,IO=IOmax,Tref=25°C 9.3 A
MTBF Predictedreliability Tref=40°C 6millionhours
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Output Current Derating at 5 V inputOutput Characteristic
Start-Up
Outputvoltagevs.loadcurrent. Availableloadcurrentvs.ambientairtemperatureandairflowatVin=5V.Seeconditionsonpage27.
Start-upatIO=10AresistiveloadatTref=+25°C,Vin=5V.StartenabledbyconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2ms/div.
Efficiency Power Dissipation
Adjusted to . V out - Typical Characteristics
Efficiencyvs.loadcurrentandinputvoltageatTref=+25°C
Dissipatedpowervs.loadcurrentandinputvoltageatTref=+25°C
Generalconditions:Inputfilter2x22µF,Outputfilter1x150µF
Turn Off
Turn-offatIO=10AresistiveloadatTref=+25°C,Vin=5V.Turn-offenabledbydisconnectingVin.Toptrace:outputvoltage(1V/div.).Bottomtrace:inputvoltage(2V/div.).Timescale:2ms/div.
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Output Ripple Transient with 150 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=5V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Transient with 00 µFoutputcapacitor
Outputvoltageresponsetoloadcurrentstep-change(2.5-7.5-2.5A)atTref=+25°C,Vin=5V.dI/dt=5A/µsToptrace:outputvoltage(ac)(100mV/div.).Bottomtrace:loadcurrent(dc)(10A/div.)Timescale:0.1ms/div.
Outputvoltageripple(20mV/div.)atTref=+25°C,Vin=5V,IO=10Aresistiveload.Bandwidth=5MHz.Timescale:2µs/div.
Adjusted to . V out - Typical CharacteristicsGeneralconditions:Inputfilter2x22µF,Outputfilter1x150µF
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
RCRegulatorcondition
min typ max Unit
HighlevelreferencedtoGND
OFF 1.7 5.5 V
Open ON
EMC Specification
Layout Recommendation TheradiatedEMIperformanceoftheDC/DCregulatorwillbeoptimisedbyincludingagroundplaneinthePCBareaundertheDC/DCregulator.Thisapproachwillreturnswitchingnoisetogroundasdirectlyaspossible,withimprovementstobothemissionandsusceptibility.
Operating Information
Remote Control (RC)TheRCpinmaybeusedtoturnonorturnofftheregulatorusingasuitableopencollectorfunction.TurnoffisachievedbyconnectingtheRCpintotheinputvoltage.
TheregulatorwillruninnormaloperationwhentheRCpinisleftopen.
AllPMB4000SeriesDC/DCregulatorshaveapositivere-motesensepinthatcanbeusedtocompensateformoder-ateamountsofresistanceinthedistributionsystemandal-lowforvoltageregulationattheloadorotherselectedpoint.Theremotesenselinewillcarryverylittlecurrentanddoesnotneedalargecrosssectionalarea.However,thesenselineonthePCBshouldbelocatedclosetoagroundtraceorgroundplane.Theremotesensecircuitrywillcompensateforupto10%voltagedropbetweenthesensevoltageandthevoltageattheoutputpinsfromVOnom.Iftheremotesenseisnotneededthesensepinshouldbeleftopen.
Remote Sense
RC
Vi
Module
Vi
GND
5 EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Operating Information
Output Voltage Adjust (Vadj)
Theoutputvoltagecanbesetbymeansofanexternalresistor,connectedtotheVadjpin.Nominaloutputvoltage0.75VissetbyleavingtheVadjpinopen.Adjustmentcanonlybemadetoincreasetheoutputvoltagesetting.
Toincrease:Connectaresistorbetween(Vadj)and(Gnd).Theoutputvoltageincreaseswithdecreasingresistorvalueasshowninthetablebelow.Notethatthemaximumoutputvoltage3.63Vmaynotbeexceeded.
Rextup(kohm)=(21.007/(VO-0.75225))-5.1
Circuitconfigurationforoutputvoltageadjust
Increase
+Out
GND
VadjLoad
Radj
Sense
OutputVoltage(V) Resistor(ohm)
0.75 Open
1.0 79.691k
1.2 41.817k
1.5 22.990k
1.8 14.949k
2.5 6.919k
3.3 3.145k
Current Limit Protection ThePMB4000SeriesDC/DCregulatorsincludecurrentlimitingcircuitrythatallowsthemtowithstandcontinuousoverloadsorshortcircuitconditionsontheoutput.Thecur-rentlimitisofhick-upmodetype.Theregulatorwillresumenormaloperationafterremovaloftheoverload.Theloaddistributionsystemshouldbedesignedtocarrythemaximumoutputshortcircuitcurrentspecified.
Input And Output ImpedanceTheimpedanceofboththepowersourceandtheloadwillinteractwiththeimpedanceoftheDC/DCregulator.Itismostimportanttohavealowcharacteristicimpedance,bothattheinputandoutput,astheregulatorshavealowenergystoragecapability.Usecapacitorsacrosstheinputifthesourceinductanceisgreaterthan4.7µH.Suitableinputcapacitorsare22µF-220µFlowESRceramics.
Maximum Capacitive LoadWhenpoweringloadswithsignificantdynamiccurrentre-quirements,thevoltageregulationattheloadcanbeimprovedbyadditionofdecouplingcapacitanceattheload.ThemosteffectivetechniqueistolocatelowESRceramiccapacitorsasclosetotheloadaspossible,usingseveralcapacitorstolowerthetotalESR.Theseceramiccapacitorswillhandleshortdurationhigh-frequencycomponentsofdynamicloadchanges.Inaddition,highervaluesofcapaci-tors(electrolyticcapacitors)shouldbeusedtohandlethemid-frequencycomponents.ItisequallyimportanttousegooddesignpracticewhenconfiguringtheDCdistributionsystem.
LowresistanceandlowinductancePCBlayoutsandca-blingshouldbeused.Rememberthatwhenusingremotesensing,allresistance(includingtheESR),inductanceandcapacitanceofthedistributionsystemiswithinthefeedbackloopoftheregulator.Thiscanaffectontheregulatorscom-pensationandtheresultingstabilityanddynamicresponseperformance.
VerylowESRandhighcapacitancemustbeusedwithcare.A“ruleofthumb”isthatthetotalcapacitancemustneverexceedtypically500-700µFifonlylowESR(<2mΩ)ce-ramiccapacitorsareused.Ifmorecapacitanceisneeded,acombinationoflowESRtypeandelectrolyticcapacitorsshouldbeused,otherwisethestabilitywillbeaffected.
ThePMB4000seriesregulatorcanacceptupto5mFofcapacitiveloadontheoutputatfullload.Thisgives<500µF/AofIO.Whenusingthatlargecapacitanceitisimportanttoconsidertheselectionofoutputcapacitors;theresultingbehaviorisacombinationoftheamountofcapacitanceandESR.
Minimum Required External Capacitors
Externalinputcapacitorsarerequiredtoincreasethelifetimeoftheinternalcapacitorsandtofurtherreducetheinputripple.Aminimumof44µF external input capacitanceµF external input capacitanceFexternalinputcapacitancewithlowESRshouldbeadded.
Aminimumof150µF external output capacitance , lowµF external output capacitance , lowFexternaloutputcapacitance,lowESR,shouldbeaddedfortheconvertertooperateproperlyatfullload.
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Operating Information
Parallel Operation
ThePMB4000SeriesDC/DCregulatorscanbeconnectedinparallelwithacommoninput.Parallelingisaccomplishedbyconnectingtheoutputvoltagepinsdirectlyandusingaloadsharingdeviceontheinput.Layoutconsiderationsshouldbemadetoavoidloadimbalance.Formoredetailsonparalleling,pleaseconsultyourlocalapplicationssupport.
Input Undervoltage LockoutThePMB4000SeriesDC/DCregulatorsareequippedwithalockoutfunctionforlowinputvoltage.Whentheinputvoltageisbelowtheundervoltagelockoutlimitoftheregulatoritwillshutoff.Whentheinputvoltageincreasesabovethelockoutleveltheregulatorwillturnon.
AcombinationoflowESRandoutputcapacitanceexceeding5mFcancausetheregulatorintoovercurrentprotectionmode(hick-up)duetohighstartupcurrent.TheoutputfiltermustthereforebedesignedwithoutexceedingtheabovestatedcapacitancelevelsiftheESRislowerthan30-40mΩ.
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Thermal Considerations
GeneralThePMB4000SeriesDC/DCregulatorsaredesignedtooperateinavarietyofthermalenvironments,howeversufficientcoolingshouldbeprovidedtohelpensurereliableoperation.Heatisremovedbyconduction,convectionandradiationtothesurroundingenvironment.Increasedairflowenhancestheheattransferviaconvection.Propercoolingcanbeverifiedbymeasuringthetemperatureatthereferencepoint(Tref).
Calculation of ambient temperature
Byusingthethermalresistancethemaximumallowedambienttemperaturecanbecalculated.
A.Thepowerlossiscalculatedbyusingtheformula ((1/η)-1)×outputpower=powerlosses. η=efficiencyofregulator.Example:95%=0.95
B.FindthevalueofthethermalresistanceRthTref-Ainthedia-grambyusingtheairflowspeedatthemodule.Takethether-malresistance×powerlosstogetthetemperatureincrease.
Thermalresistancevs.airspeedmeasuredattheregulator.
C.Maxallowedcalculatedambienttemperatureis:MaxTrefofDC/DCregulator-temperatureincrease.
Example:5Vinput,1.8Voutputat1m/s,fullload:
B.2W×9°C/W=18°C
C.115°C-18°C=maxambienttemperatureis97°C
Therealtemperaturewillbedependentonseveralfactors,likePCBsizeandtype,directionofairflow,airturbulenceetc.Itisrecommendedtoverifythetemperaturebytesting.
A.((1/0.9)-1)×18W=2W
ThePMB4000thermaltestingisperformedwiththeproductmountedonanFR4board254× 254 mm with 8× 254 mm with 8254mmwith8layersof35µm copper. Airflow is perpendicular to the Tµm copper. Airflow is perpendicular to the Tmcopper.AirflowisperpendiculartotheTrefside.
25m
m[1
in.]
airflow
Test board
choke
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
ThePMB4000seriesDC/DCregulatorsareintendedformanualorwavesoldering.Theplasticbodyofthepinconnectorsresistssolderingheatforlimitedtimeupto260°C..Whenhandsoldering,careshouldbetakentoavoiddirectcontactbetweenthehotsolderingirontipandthepinsformorethanafewsecondsinordertoavoidmeltingoftheplastic.
Soldering Information
Delivery Package InformationThePMB4000seriesregulatorsaredeliveredinantistatictrayswithJedecstandardouterdimensions.Traycapacity25pcs.Eachboxcontains4trays.
ReliabilityThe Mean Time Between Failure (MTBF) of the PMB 4000seriesDC/DCregulatorfamilyiscalculatedtobegreaterthan6millionhoursatfulloutputpowerandareferencetemperatureof+40°CusingTelCordiaSR332.
Compatibility with RoHS requirementsTheproductsarecompatiblewiththerelevantclausesandrequirementsoftheRoHSdirective2002/95/ECandhaveamaximumconcentrationvalueof0.1%byweightinhomogeneousmaterialsforlead,mercury,hexavalentchromium,PBBandPBDEandof0.01%byweightinhomogeneousmaterialsforcadmium.
ExemptionsintheRoHSdirectiveutilizedinEricssonPowerModulesproductsinclude:•Leadinhighmeltingtemperaturetypesolder(usedtosolderthedieinsemiconductorpackages)•Leadinglassofelectronicscomponentsandinelectronicceramicparts(e.g.fillmaterialinchipresistors)•Leadasanalloyingelementincopperalloycontainingupto4%leadbyweight(usedinconnectionpinsmadeofBrass)
EN/LZT146048R4A©EricssonPowerModules,March2007PMB4418TWPDatasheet
Sales Offices and Contact Information
CompanyHeadquarters EricssonPowerModulesABLMEricssonsväg30SE-12625StockholmSweden
Phone:+46-8-568-69620Fax:+46-8-568-69599
China EricssonSimtekElectronicsCo.33FuhuaRoadJiadingDistrictShanghai201818China
Phone:+86-21-5990-3258Fax:+86-21-5990-0188
NorthandSouthAmerica EricssonInc.PowerModules6300LegacyDr.Plano,TX75024USA
Phone:+1-972-583-5254+1-972-583-6910Fax:+1-972-583-7839
HongKong(AsiaPacific) EricssonLtd.12/F.DevonHouse979King’sRoadQuarryBayHongKong
Phone:+852-2590-2453Fax:+852-2590-7152
Italy,Spain(Mediterranean) EricssonPowerModulesABViaCadorna7120090Vimodrone(MI)Italy
Phone:+39-02-265-946-07Fax:+39-02-265-946-69
Allothercountries ContactCompanyHeadquartersorvisitourwebsite:www.ericsson.com/powermodules
Informationgiveninthisdatasheetisbelievedtobeaccurateandreliable.Noresponsibilityisassumedfortheconsequencesofitsusenorforanyinfringementofpatentsorotherrightsofthirdpartieswhichmayresultfromitsuse.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofEricssonPowerModules.TheseproductsaresoldonlyaccordingtoEricssonPowerModules’generalconditionsofsale,unlessotherwiseconfirmedinwriting.Specificationssubjecttochangewithoutnotice.
Germany,Austria EricssonPowerModulesABMühlhauserWeg1885737IsmaningGermany
Phone:+49-89-9500-6905Fax:+49-89-9500-6911
Japan EricssonPowerModulesABKimuraDainiBuilding,3FL.3-29-7Minami-Oomachi,Shinagawa-kaTokyo140-0013Japan
Phone:+81-3-5733-5107Fax:+81-3-5753-5162