171020560 WURTH
Document overview
- Manufacturer or author: Provided By digicamel.com
- PDF pages: 34
Technical content
Datasheet sections
- 1 PINOUT
- 2 ORDERING INFORMATION
- 3 PINOUT COMPATIBLE FAMILY MEMBERS
- 4 SALES INFORMATION
- 5 ABSOLUTE MAXIMUM RATINGS
- 6 OPERATING CONDITIONS
- 7 THERMAL SPECIFICATIONS
- 8 ELECTRICAL SPECIFICATIONS
- 9 RoHS, REACH
- 10 PACKAGE SPECIFICATIONS
- 11 NOTES
- 12 TYPICAL PERFORMANCE CURVES
- 12.1 RadiatedEmissions(WithEMIInputFilter)
- 12.1.1 RadiatedEmissionsEN55032(CISPR32)ClassBComplaintTestSetup
- 12.1.2 RadiatedEmissions
- 13 DC PERFORMANCE CURVES
- 13.1 Efficiency5Vin
- 13.3 ThermalDerating5Vin
- 14 BLOCK DIAGRAM
- 15 CIRCUIT DESCRIPTION
- 16 DESIGN FLOW
- 16.1 STEP1 SettheOutputVoltage(V OUT)
- 16.2 STEP2 SelecttheInputCapacitor(C IN)
- 16.3 STEP3 SelecttheOutputCapacitor(C OUT)
- 16.4 STEP4 SelecttheFeed-ForwardCapacitor(C FF)
- 16.5 STEP5 Optional: SetthePowerGoodResistor
- 17 MODES OF OPERATION
- 17.1 PFMOperation
- 17.2 PWMOperation
- 17.3 DropoutOperation
- 18 OUTPUT VOLTAGE RIPPLE
- 18.1 PFMOperation
- 18.2 PWMOperation
- 19 PROTECTION FEATURES
- 19.1 OvercurrentProtection(OCP)andShortCircuitProtection(SCP)
- 19.2 OverTemperatureProtection(OTP)
- 19.3 Soft-Start
WPME-VDMM -VariableStepDownMicroModule 2.5V - 5.5V Input / 2A Output / 0.6V - 4V Output
DESCRIPTION
TheVDMM171020560MagI 3CMicroModuleprovides a fully integrated DC-DC power supply including the switching regulator IC with integrated MOSFETs, controller, compensation and shielded inductor in one package. The 171020560 offers high efficiency and delivers up to 2A of output current. It operates with an input voltage from 2.5V to 5.5V and is designed for a small solutionsize. The automatic mode transitions ensure the best efficiencyandoutputvoltagerippleatallloadcurrents. The 171020560 is available in an LGA-9 package (3.5 x3.5x1.5mm). This module has integrated protection circuitry that guards against thermal overstress with thermal shutdown and protects against electrical damage using overcurrent, short-circuit and undervoltage protections. TYPICAL APPLICATIONS
- General point of load power supply for low power systems
- Replacementoflinearregulators
- DSPandFPGApowersupply,auxiliaryvoltages
- Portableinstruments
- Batterypoweredequipment TYPICAL CIRCUIT DIAGRAM
FEATURES
- Peakefficiencyupto96%
- Currentcapabilityupto2A
- Inputvoltagerange: 2.5Vto5.5V
- Outputvoltagerange: 0.6Vto4V
- 4µAtypicalquiescentcurrent
- Integratedshieldedinductor
- Lowoutputvoltageripple: ±7mVtyp.
- Outputvoltageaccuracy: 1%
- Fixedswitchingfrequency: 4MHz
- AutomaticPFM/PWMmode
- Synchronousoperation
- Undervoltagelockout
- Powergoodindicator
- Internalsoft-start
- Thermalshutdown
- Short-circuitprotection
- RoHSundREACHcompliant
- Operatingambienttemperatureupto105°C
- Operatingjunctiontemp. range: -40°Cto125°C
- Complies with EN55032 (CISPR-32) class B radiated emissionsstandard DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 1
WPME-VDMM -VariableStepDownMicroModule DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 3
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1 PINOUT
Figure1:Pinout Table1:MarkingDescription MARKING DESCRIPTION WE Logo
020560 Partnumber
°YYWWL Pin1indicator,year,weekandlotnumber Table2:PinDescription SYMBOL NUMBER TYPE DESCRIPTION VIN A1,A2 Power Inputvoltage. PlacetheinputcapacitorascloseaspossibletoVINand GND. EN A3 Input Enablepin. Settingthispinhighenablesthedevice,whilesettingthispin lowshutsdownthedevice. Thispinmustnotbeleftfloating. GND B1,C1 Power Powerground. Itmustbeconnectedtothegroundplaneandtothe exposedpad. VOUT B2,C2 Power Outputvoltage. PlaceoutputcapacitorsascloseaspossibletoVOUTand GND.Forthermalperformance,usecopperplane(s)atthispin. PG B3 Output Powergoodflagpin. Thisopendrainoutputassertslowiftheoutput voltageisoutofregulation. Apull-upresistorof100k Ω isrequiredifthis functionisused. FB C3 Input Feedbackpin. Thispinmustbeconnectedtotheexternalresistordivider (betweenVOUTandGND)toadjusttheoutputvoltage. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 4
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2 ORDERING INFORMATION
Table3:Orderinginformation. ORDER CODE SPECIFICATIONS PACKAGE PACKAGING UNIT 171020560 2A/0.6V-4VVout LGA-9 7”Reel(1000pieces) 178020560 2A/0.6V-4VVout EvalBoard 1piece
3 PINOUT COMPATIBLE FAMILY MEMBERS
Table4:Pinoutcompatiblefamilymembers. ORDER CODE SPECIFICATIONS PACKAGE PACKAGING UNIT 171010560 1A/0.6V-4VVout LGA-9 7”Reel(1000pieces) 171030560 3A/0.6V-4VVout LGA-9 7”Reel(1000pieces)
4 SALES INFORMATION
Table5:Salesinformation. SALES CONTACT WürthElektronikeiSosGmbH&Co.KG EMCandInductiveSolutions Max-Eyth-Str. 1 74638Waldenburg Germany Tel. +49(0)79429450 www.we-online.com/powermodules Technicalsupport: wpme-support@we-online.com DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 5
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5 ABSOLUTE MAXIMUM RATINGS
Caution: Exceedingthelistedabsolutemaximumratingsmayaffectthedevicenegativelyandmaycausepermanentdamage. Table6:AbsoluteMaximumRatings. SYMBOL PARAMETER LIMIT UNITMIN MAX VIN Inputvoltagepin -0.3 6 V VOUT Outputvoltagepin -0.3 VIN +0.3 V FB Feedbackpin -0.3 6 V EN Enablepin -0.3 6 V PG Powergoodpin -0.3 6 V Tstorage Assembled,non-operatingstoragetemperature -40 125 °C Vesd ESDVoltage(HBM),allpins(C=100pF,R=1.5k Ω)(4) -2 2 kV
6 OPERATING CONDITIONS
Operatingconditionsareconditionsunderwhichthedeviceisintendedtobefunctional. AllvaluesarereferencedtoGND. MINandMAXlimitsarevalidfortherecommendedambienttemperaturerangeof-40°Cto105°C. Table7:OperatingConditions. SYMBOL PARAMETER MIN TYP MAX UNIT VIN Inputvoltage 2.5 — 5.5 V VOUT Outputvoltage 0.6 — 4 V IPG PGsinkcurrent — — 1 mA Ta Ambienttemperaturerange -40 — 105 °C Tjop Junctiontemperaturerange -40 — 125 °C Iout Outputcurrent(5) 0 — 2 A
7 THERMAL SPECIFICATIONS
Caution: Exceedingthelistedabsolutemaximumratingsmayaffectthedevicenegativelyandmaycausepermanentdamage. Table8:ThermalSpecifications SYMBOL PARAMETER TYP UNIT ΘJA Junction-to-ambientthermalresistance (2) 42.5 K/W ΘJC Junction-to-case(top)thermalresistance (2) 28.4 K/W TSD Thermalshutdown,rising 150 °C Thermalshutdown,hysteresis 20 °C DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 6
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8 ELECTRICAL SPECIFICATIONS
Caution: MINandMAXlimitsarevalidfortherecommendedambienttemperaturerangeof-40°Cto105°C.Typicalvaluesrepresents statisticallytheutmostprobablevaluesatthefollowingconditions: V IN =5V,V OUT =1.5V,C IN =10µFceramic,C OUT =2x10µF MLCC,TA =25°Cunlessotherwisenoted. Table9:ElectricalSpecifications. SYMBOL PARAMETER TEST CONDITIONS LIMIT UNITMIN(1) TYP(3) MAX(1) Output Current IOC-HS Overcurrentlimit, high-sideswitch — 4.3 — A Output Voltage VOUT Loadregulation -2 — 2 % Outputvoltageripple (6) IOUT =2A — 7 — mV VFB Referencevoltage 594 600 606 mV IFB Feedbackpinbiascurrent — 10 50 nA Switching Frequency fSW Switchingfrequency — 4 — MHz Enable and Undervoltage Lockout VUVLO VIN undervoltagethreshold VIN increasing 2.1 2.2 2.3 V VUVLO hysteresis — 160 — mV VEN ENthreshold Enablelogichigh 1 — — V Enablelogiclow — — 0.4 V IEN ENpininputcurrent — 10 100 nA Soft-Start tSS Soft-starttime ENhighto95%ofV OUT — 1.25 — ms Power Good VPG PGlowerthreshold VPG rising — 96 — % VPG falling — 92 — % PGupperthreshold VPG rising — 105 — % VPG falling — 110 — % Input Quiescent and Shutdown Current ISD Shutdowncurrent EN=low — 50 500 nA IQ Quiescentcurrent EN=high,noswitching — 4 — µA Efficiency η Efficiency IOUT =1.1A — 89 — % VOUT =4V,I OUT =1.1A — 96 — % DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 7
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9 RoHS, REACH
Directive2011/65/EUoftheEuropeanParliamentandtheCouncil ofJune8th,2011ontherestrictionoftheuseofcertainhazardous substancesinelectricalandelectronicequipment. REACH directive Directive1907/2006/EUoftheEuropeanParliamentandthe CouncilofJune1st,2007regardingtheRegistration,Evaluation, AuthorizationandRestrictionofChemicals(REACH).
10 PACKAGE SPECIFICATIONS
ITEM PARAMETER TYP(3) UNIT MoldCompound UL94V-0 - - Weight - 0.056 g
11 NOTES
(1) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlationusingStatisticalQualityControl(SQC)methods. (2) Measuredwithoutheatsink. Naturalconvection(0-20LFM/0-0.1m/s)ona40x60mmfourlayerboard, with35µm(1ounce) copperonalllayers. (3) Typicalnumbersarevalidat25°CambienttemperatureandrepresentstatisticallytheutmostprobablevaluesassumingaGaussian distribution. (4) Thehumanbodymodelisa100pFcapacitordischargedthrougha1.5k Ω resistorintoeachpin. TestmethodisperJESD-22-114. (5) Dependentonambienttemperature;see THERMALDERATING. (6) Theindustrystandardforcomparisonoftheoutputvoltageripplebetweenswitchingregulatorsormodulesrequiresa10µFceramic (sometimesadditional1µFceramicinparallel)atthepointofloadwherethevoltagemeasurementisdoneusinganoscilloscope withitsprobeandprobejackdesignedforlowvoltage/highfrequency(lowimpedance)measurement. Theoscilloscopesbandwidth islimitedat20MHz. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 8
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12 TYPICAL PERFORMANCE CURVES
Ifnototherwisespecified,thefollowingconditionsapply: T A =25°C.
12.1 Radiated Emissions (With EMI Input Filter)
The171020560powermodulesweretestedinseveralEMCconfigurationstogivemorerealisticinformationaboutimplementationinthe applications. ThetestsetupisbasedonCISPR16withthelimitvaluesofCISPR32. Allmeasurementswereperformedwiththelayout andcomponentsshownin DESIGNEXAMPLE.
12.1.1 Radiated Emissions EN 55032 (CISPR 32) Class B Complaint Test Setup
- MeasuredinaFullyAnechoicRoom(FAR)at3mantennadistance.
- Inputwirelength: 160cm(80cmhorizontal+80cmvertical)
- Outputwirelength: Loaddirectlyonboard
12.1.2 Radiated Emissions
-10 Radiated Emissions in dBµV/m EN55032 Class A Limit EN55032 Class B Limit Horizontal Vertical Horizontal Figure2:Radiatedemissions171020560V IN =5V,V OUT =3.3,I LOAD =2Awithinputfilter. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 9
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13 DC PERFORMANCE CURVES
13.1 Efficiency 5VIN
100Efficiency in % Vout = 4V Vout = 1.5V Vout = 3.3V Vout = 1.2V Vout = 2.5V Vout = 0.8V Figure3:171020560efficiencyV IN =5V. 13.2 Efficiency 3.3VIN Output Current in A 100Efficiency in % Vout = 2.5V Vout = 1.2V Vout = 1.8V Vout = 0.8V Vout = 1.5V Vout = 0.6V Figure4:171020560efficiencyV IN =3.3V. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 10
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13.3 Thermal Derating 5VIN
0 10 20 30 40 50 60 70 80 90 100 110 120 130 Ambient Temperature in °C 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6Output Current in A Vout = 3.3V Vout = 3.3V Figure5:171020560outputcurrentthermalderatingV IN =5V. Note: Thermalderatinggraphsweremeasuredonthe178020560EvaluationBoard (2) (80x80mm,fourlayers,70µmouterlayers,35 µminnerlayerscopperthickness). PleaseseeT A limitsin OPERATINGCONDITIONS. 13.4 Load Regulation 3.3VOUT Output Current in A 3.26 3.28 3.30 3.32 3.34 3.36 3.38 3.40Output Voltage in V Vin = 5V Vin = 5V Figure6:171020560LoadRegulationV OUT =3.3V. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 11
WPME-VDMM -VariableStepDownMicroModule 13.5 Load Regulation 1.5VOUT Output Current in A 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54Output Voltage in V Vin = 5V Vin = 3.3V Vin = 5V Figure7:171020560LoadRegulationV OUT =1.5V. 13.6 Line Regulation 1.5VOUT Input Voltage in V 1.45 1.46 1.47 1.48 1.49 1.50Output Voltage in V Iout = 0.2A Iout = 2A Iout = 0.2A Figure8:171020560LineRegulationV OUT =1.5V. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 12
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14 BLOCK DIAGRAM
Figure9:171020560blockdiagram.
15 CIRCUIT DESCRIPTION
The WPME-VDMM 171020560 power module is a DC-DC power supply including the switching regulator with integrated MOSFETs, controller and compensation, as well as the shielded inductor integrated in one package. The control scheme is based on a combined architectureintegratingvoltage,currentandhystereticcontrolloops. TheVOUT oftheregulatorisdividedbythefeedbackresistornetworkR FBT andRFBB andfedintotheFBpin. Theerroramplifiercompares thissignalwiththeinternal600mVreference. Theerrorsignalisamplifiedtoadjusttheon-time,keepingthefrequencyalmostconstant. ThissignaldrivesthepowerMOSFETs. Theoperationalfrequencyadjustsbasedon theinput voltageandload conditions, ensuringthebest regulationand noiseperformance forthegivenconditions. Thisarchitecturesupportsfasttransientresponseandverysmalloutputvoltageripples(<7mV p-p). DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 13
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16 DESIGN FLOW
Thefollowingsimplestepswillshowhowtoselecttheexternalcomponentstodesignthe171020560intoanapplication. Essential Steps 1. Setoutputvoltage 2. Selectinputcapacitor 3. Selectoutputcapacitor 4. Selectfeed-forwardcapacitor Optional Steps 5. Setthepowergoodresistor 1.2. 3. Figure10:Designflowschematic. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 14
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16.1 STEP 1 Set the Output Voltage (VOUT)
TheoutputvoltageisselectedwithanexternalresistordividerbetweenV OUT andGND(seefigure 11). Thevoltageacrossthelowerresistor ofthedividerisprovidedtotheFBpinandcomparedwithareferencevoltageof600mV(V REF). Themodulecanprovidetheentireoutput currentof2Awithanoutputvoltagerangeof0.6Vto4V.Theoutputvoltagecanbecalculatedaccordingtothefollowingformula: V OUT = V REF · (RFBT RFBB + 1 (1) Oneresistormustbechosenandthentheotherresistorcanbecalculated. TherecommendedvalueforR FBT isbetween100k Ω to1MΩ. Forexample, ifRFBT =100kΩ thentheresistancevalueofthelowerresistorinthefeedbacknetworkisindicatedinthetablebelowfor commonoutputvoltages. Table10:171020560outputvoltageselection. RFBB (E96) (kΩ) 301 100 68 49.9 31.6 22.1 B2, C2 B1, C1 Figure11:Outputvoltageselectionschematic. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 15
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16.2 STEP 2 Select the Input Capacitor (CIN)
The energyat the input of the power module is stored in the input capacitor. MLCC(multi-layerceramic capacitor)input capacitors are required externally to provide cycle-by-cycle switching current and to support load transients. The external input capacitor must be placeddirectlyattheVINpin. Attentionmustbepaidtothevoltage,frequency,temperaturederatingandthermalclassoftheselected capacitor. OneWürthElektronik885012207026MLCChasbeenexperimentallyverifiedtoworkwiththispowermodule.
16.3 STEP 3 Select the Output Capacitor (COUT)
Theoutputcapacitorshouldbeselectedinordertominimizetheoutputvoltagerippleandtoprovideastablevoltageattheoutput. Italso affectstheloopstability. Attentionmustbepaidtothevoltage, frequencyandtemperaturederatingandthermalclassoftheselected capacitor. Ingeneral,theoutputvoltageripplecanbecalculatedusingthefollowingequation: V OUT,ripple = ∆IL · ESR + ∆IL · ( 1 8 · fSW · COUT (2) where∆IL istheinductorcurrentrippleandcanbecalculatedwiththefollowingequation: ∆IL = V OUT · (V IN − V OUT) fSW · L · V IN (3) The external output capacitors must be placed as close to the VOUT pin as possible. An output capacitance value of 20µF is recommendedforbestperformance. TwoWürthElektronik885012207026MLCCshavebeenexperimentallyverifiedtoworkwiththis powermodule. Usingtherecommendedoutputcapacitors,thetransientresponseofthepowermodulecanappearasfollows: Time in ms -75 -50 -25 Voltage in mV Figure12:171020560VIN =5V,V OUT =3.3V,loadjumps0%-100%. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 16
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16.4 STEP 4 Select the Feed-Forward Capacitor (CFF)
The 171020560 MagI3C power module allows for the selection of a feed forward capacitor, CFF. The Würth Elektronik 885012005032 MLCChasbeenexperimentallyverifiedtoworkwiththispowermodule.
16.5 STEP 5 Optional: Set the Power Good Resistor
ThePGpinisanopen-drainoutput. Oncetheoutputvoltageisabove96%(typ.) oftheinternalreferencevoltagethePGpintransitionsto ahighimpedancestate. Therecommendedpull-upresistorvalueis100k Ω,whichshouldbeconnectedtoavoltagesourcesuchasVOUT. ThePGpinispulledlowwhentheoutputvoltageislowerthan92%(typ.) orhigherthan105%(typ.) oftheinternalreferencevoltage. The PGpinwillbepulledlowwhentheUVLOorthermalshutdownactivatesorwhentheENpinispulledlow. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 17
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17 MODES OF OPERATION
Dependingontheloadcurrent,inputvoltageandoutputvoltage,the171020560powermoduleautomaticallyswitchesbetweenoneof threeoperationalmodes:
- PFM:powersavingoperationalmodeforlightloadswheretheinductorcurrentwouldbecomediscontinuous.
- PWM:standardoperationalmodeoncetheloadcurrentexceedshalfoftheinductorripplecurrent. Thedevicewillnolongeroperate inPFMmode,transitioningtoPWMmodeautomatically.
- Dropout: 100%dutycycleoperationalmodewhentheinputvoltageapproachesthesetoutputvoltage.
17.1 PFM Operation
PFMmodeisusedduringlightloadconditionsandreliesonpulseskipping. Inthismode,thefeedbackvoltageiscomparedtoaninternal reference. Ifthefeedbackvoltagefallsbelowthereference,aminimumon-timepulseistriggeredtoactivatethehigh-sideMOSFETand deliverenergytotheoutputcapacitor. Ifthefeedbackvoltageexceedsthereference, thepulseisskipped. Astheloadincreases, more pulsesaregenerateduntiltheswitchingfrequencyreachesitsnominalvalue,atwhichpointthesystemtransitionssmoothlyintoPWM mode.
17.2 PWM Operation
PWM mode is active under medium to heavy load conditions. It operates using an adaptive constant on-time control strategy, which ensures excellent transient response and maintains an almost constant switching frequency. The system monitors the switch node to estimate the actual output voltage and generates a ramp signal proportional to this value. An error amplifier produces a control signal thatiscomparedwiththeadaptiveramp. Thiscomparisonadjuststheon-timeduration—eitherextendingorshorteningit—tomaintain stableoperation.
17.3 Dropout Operation
Thispowermodulecanoperateat100%dutycycle. Duringdropoutoperationthehigh-sideswitchremainsonwhilethelow-sideswitch remainsoff. Inordertomaintainregulation,abufferoftypically5%morethanthedesiredoutputvoltagemustbemaintainedattheinput. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 18
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18 OUTPUT VOLTAGE RIPPLE
Theoutputvoltagerippleisdeterminedbytheoperationalmodeofthepowermodule. DuringPWMoperation,atypicaloutputvoltage rippleof7mVcanbeexpected. Theswitchingfrequencyof4MHzcanbeseenintheoutputripple. DuringPFM,aslightlyincreasedripple can be expected, to maximizethe powersavingof the powermodule while a lowerfrequencyenvelope can be observedon the output voltagerippleduetotheswitchingandnon-switchingportionsofoperationalmode.
18.1 PFM Operation
-25 -20 -15 -10 Output Voltage Ripple in mV Figure13:171020560outputvoltagerippleV IN =5V,V OUT =3.3V,I OUT =0A.
18.2 PWM Operation
Time in µs -10 Output Voltage Ripple in mV Figure14:171020560outputvoltagerippleV IN =5V,V OUT =3.3V,I OUT =2A. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 19
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19 PROTECTION FEATURES
19.1 Overcurrent Protection (OCP) and Short Circuit Protection (SCP)
The MagI3C 171020560 power module implements a cycle-by-cycle high-side switch current limit (seeELECTRICAL SPECIFICATION). Whenthelimitishit32times,thedevicewillstopswitching,leavingbothswitchesopen,thenresumeoperationafterafixedtimedelay. Iftheoutputfaultconditionremains,thisbehaviorwillrepeat,functioningashiccupprotectionforthedevice. Oncetheoutputfaulthas beenremovedandthedevicefinishesaperiodofnoswitching,thedevicewillresumenormaloperation. Time in ms Voltage in V Current in A Output Voltage Output Current Output Voltage Figure15:171020560overcurrentprotectionV IN =5V,V OUT =3.3V,I OUT =0Ato4A. 0 20 40 60 80 100 120 140 160 180 200 220 240 Time in ms Output Voltage in V Figure16:171020560shortcircuitprotectionV IN =5V,V OUT =3.3V. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 20
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19.2 Over Temperature Protection (OTP)
Thermal protection helps prevent catastrophic failures due to accidental device overheating. The junction temperature of the MagI3C powermoduleshouldnotbeallowedtoexceeditsmaximumratings. Thermalprotectionisimplementedbyaninternalthermalshutdown circuit,whichactivateswhenthejunctiontemperaturereaches150°C(typ.). UnderthethermalshutdownconditionbothMOSFETsremain off, causing the output voltage to drop. When the junction temperature falls below 130°C (typ.) the internal soft-start is released, the outputvoltagerisessmoothly,andnormaloperationresumes.
19.3 Soft-Start
TheMagI3Cpowermoduleimplementsaninternalsoft-startinordertolimittheinrushcurrentandavoidoutputvoltageovershootduring start-up. Thetypicaldurationofthesoft-startis1.25ms(seefigure 17). Time in ms Voltage in V Input Voltage Output Voltage Input Voltage Figure17:171020560soft-startV IN =5V,V OUT =3.3V. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 21
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19.4 Enable and Integrated/Adjustable UVLO
TheMagI3CpowermoduleisenabledbysettingtheENpinhigh. WhentheENvoltagereaches1Vthepowermodulebeginsswitching and the internal soft-start regulates the output voltage rise until the desired output voltage is met, allowing normal operation to take place. Thedeviceincorporatesaninternalinputundervoltagelockout(UVLO)toprotectfromunexpectedbehavioratinputvoltagesbelowthe recommendedvalues. ThethresholdsoftheinternalUVLOareindicatedinthe ELECTRICALSPECIFICATIONS. AnadditionalUVLOthresholdofthepowermodulecanbeexternallysetbyaddingaresistorbetweenVINandENandasecondresistor betweenENandGND.Thisvoltagedividershouldbechosensothatthedesiredminimuminputvoltagecorrespondsto1VatEN. Thetworesistorsshouldbechosenbasedonthefollowingratio: RENT RENB = V UVLO(EXT.) 1 − 1 (4) VUVLO(EXT.) =Desiredinputvoltagethresholdtoenableanddisablethepowermodule VIN MODULE EN VIN RENT RENB B1, C1 A1, A2 Figure18:ExternalUVLOvoltageselectionschematic. Thisisoftenusedinbattery-poweredsystemstopreventdeepdischargeofthesystembattery. Itisalsousefulinsystemdesignswith output rail sequencing or to prevent early turn-on of the supply as the main input voltage rail rises at power-up. Most systems will benefitbyusingtheprecisionenablethresholdtoestablishasystemundervoltagelockoutbasedonspecificapplicationparameters. In the case of sequencing supplies, the divider is connected to a rail that becomes active earlier in the power-up cycle than the MagI3C powermoduleoutputrail. TherecommendedapproachistochooseaninputUVLOlevelthatishigherthanthetargetregulatedoutput voltageforthestage. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 22
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20 DESIGN EXAMPLE
Thedesignexampleshowsarecommendedsolutionfor5Vto3.3Vwithamaximumoutputcurrentof2A.Allnecessarycomponentsto fulfill the CISPR 32 EMI conducted- and radiated emissions test requirements are included in the design example. The design example passestheconductedandradiatedemissionsrequirementsforclassBwith0.8minputandtheloaddirectlysolderedtotheboard. Filter componentsmaybeomitteddependingontherequirementsofthefinalapplication.
20.1 Layout
Top Layer Internal Layer 1 Internal Layer 2 Bottom Layer Figure19:171020560layoutrecommendation. Figure19aboveshowsthetop,innerandbottomroutedlayersforthedesignexample. TherearetwointernalGNDlayersthatimprove thermal performance. The pictures above show a possible layout for the 171020560 MagI3C power module. Nevertheless, some recommendationsshouldbefollowedwhendesigningthelayout: 1. TheinputandoutputcapacitorsshouldbeplacedascloseaspossibletotheVINandVOUTpinsofthedevice. 2. ThefeedbackresistordividershouldbeplacedascloseaspossibletotheFBpin. 3. Avoidplacingviasinanyofthepadsforthemodule. 4. UseaswideGNDplaneaspossibletoensurestableoperationofthepowermodule. 5. UseanuninterruptedGNDplaneonthebottomlayer,connectedwithadequatenumberofviastothetoplayertoimprovethermal performanceandEMIbehavior. 6. ToavoiddirectcouplingoftheDC/DCconverter´sE-andH-fieldsintoconnectors,thesusceptiblecomponentsandtracesmustbe placedasfarawayfromthemoduleaspossible. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 23
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20.2 Schematic
3.3V Figure20:171020560designexampleschematic.
20.3 Bill of Materials
Table11:RecommendedExternalComponents. Designator Description Function Quantity Order Code VDMM MagI3Cpowermodule Powersupply 1 171020560 CF 0805,X7R,10µF,10VDC Inputfilter 1 885012207026 LF 1610,0.33µH,1.9A Inputfilter 1 744383130033 CBULK Aluminumelectrolytic,1000µF,6.3V Inputfilter 1 865230157008 CIN 0805,X7R,10µF,10VDC Electricalperformance 1 885012207026 COUT 0805,X7R,10µF,10VDC Electricalperformance 2 885012207026 CFF 0603,NP0,150pF,16VDC Electricalperformance 1 885012006024 RFBT 100kΩ Electricalperformance 1 560112110019 RFBB 22kΩ forVOUT =3.3V Electricalperformance 1 560112110098 DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 24
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21 HANDLING RECOMMENDATIONS
- ThepowermoduleisclassifiedasMSL3(JEDECMoistureSensitivityLevel3)andrequiresspecialhandlingduetomoisturesensitivity (JEDECJ-STD033D). 2. Thepartsaredeliveredinasealedbag(MoistureBarrierBag=MBB)andshouldbeprocessedwithinoneyear. 3. Whenopeningthemoisturebarrierbag, checktheHumidityIndicatorCard(HIC)forcolorstatus. Bakepartspriortosolderingin caseindicatorcolorhaschangedaccordingtothenotesonthecard. 4. Partsmustbeprocessedafter168hour(7days)offloorlife. Oncethistimehasbeenexceeded,bakepartspriortosolderingper JEDECJ-STD033Drecommendation. 5. Maximumnumberofsoldercyclesistwo. 6. Forminimumrisk,solderthemoduleinthelastsoldercycleofthePCBproduction. 7. Forsolderingprocesspleaseconsiderleadmaterialcopper(Cu)andleadfinishENEPIG. 8. ItisrecommendedtouseastandardSACAlloysuchasSAC305,type3orhigher. 9. Theprofilebelowisvalidforconvectionreflowonly. 10. Othersolderingmethods(e.g. vaporphase)arenotverifiedandhavetobevalidatedbythecustomerattheirownrisk.
22 SOLDER PROFILE
Table12:Reflowsolderprofile. Profile Feature Symbol Value Preheattemperatureminimum Ts_min 150°C Preheattemperaturemaximum Ts_max 200°C PreheattimefromT s_min toTs_max ts 60-120seconds Liquidoustemperature TL 217°C TimemaintainedaboveT L tL 60-150seconds Classificationtemperature TC 260°C Peakpackagebodytemperature TP TP ≤ TC Timewithin5°CofthespecifiedT C tP tP ≤ 30seconds Ramp-uprate(T L toTp) 3°C/secondmaximum Ramp-downrate(T p toTL) 6°C/secondmaximum Time25°Ctopeaktemperature 8minutesmaximum PleaserefertoJEDECJ-STD020Fforfurtherinformationpertainingtoreflowsolderingofelectroniccomponents. Temperature [°C] Time [Seconds] tL tS Ts_min Ts_max TP TL tP tP User TP ≤T C Figure21:Solderprofile. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 25
WPME-VDMM -VariableStepDownMicroModule
23 PHYSICAL DIMENSIONS
23.1 Component
0,75 1,0 1,0 0,6 3,5 0,3 1,5 3,5 Figure22:171020560ModuleDimensions. Alldimensionsinmm Tolerances±0,1mmunlessotherwisespecified DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 26
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23.2 Example Landpattern Design
Figure23:Examplelandpatterndesign. Alldimensionsinmm Stencilthicknessof100µmisrecommended DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 27
WPME-VDMM -VariableStepDownMicroModule
23.3 Tape
End Feeding direction Start T Carrier Tape Top Cover Tape F E1 E2 W Cover Tape No Component min. 160mm Components No Component min. 100mm Cover Tape min. 400mm A A Figure24:Tape. Table13:Tapedimensions. Tape Type A0 B0 W T K0 P0 P1 P2 D0 D1 E1 E2 F Material typ. typ. +0.3/- Alldimensionsinmm DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 28
WPME-VDMM -VariableStepDownMicroModule
23.4 Reel
D detail B Cover Tape Chip Cavity Sprocket Hole Embossment N A close to center B C B Figure25:Reel. Table14:Reeldimensions. A B C D N W1 W2 W3 W3 Material Alldimensionsinmm DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 29
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24 DOCUMENT HISTORY
Table15:Documenthistory. Revision Date Description Comment
1.0 August2025 Initialdatasheetrelease
DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 30
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25 LIST OF FIGURES
DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 31
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26 LIST OF TABLES
DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 32
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27 CAUTIONS AND WARNINGS
The following conditions apply to all goods within the product series of MagI 3C of Würth Elektronik eiSos GmbH & Co. KG: General:
- Allrecommendationsaccordingtothegeneraltechnicalspecificationsofthedata-sheethavetobecompliedwith.
- The usage and operation of the product within ambient conditions which probably alloy or harm the component surface has to be avoided.
- The responsibility for the applicability of customer specific products and use in a particular customer design is always within the authorityofthecustomer. Alltechnicalspecificationsforstandardproductsdoalsoapplyforcustomerspecificproducts
- Residualwashingvarnishagentthatisusedduringtheproductiontocleantheapplicationmightchangethecharacteristicsofthebody, pinsortermination. Thewashingvarnishagentcouldhaveanegativeeffectonthelongtermfunctionoftheproduct. Directmechanical impacttotheproductshallbepreventedasthematerialofthebody,pinsorterminationcouldflakeorintheworstcaseitcouldbreak. AsthesedevicesaresensitivetoelectrostaticdischargecustomershallfollowproperICHandlingProcedures.
- Customeracknowledgesandagreesthatitissolelyresponsibleforcompliancewithalllegal,regulatoryandsafety-relatedrequirements concerning its products, and any use of Würth Elektronik eiSos GmbH & Co. KG components in its applications, notwithstanding any applications-relatedinformationorsupportthatmaybeprovidedbyWürthElektronikeiSosGmbH&Co.KG.
- Customerrepresentsandagreesthatithasallthenecessaryexpertisetocreateandimplementsafeguardswhichanticipatedangerous consequences of failures, monitor failures and their consequences lessen the likelihood of failures that might cause harm and take appropriateremedialactions
- CustomerwillfullyindemnifyWürthElektronikeiSosanditsrepresentativesagainstanydamagesarisingoutoftheuseofanyWürth ElektronikeiSosGmbH&Co.KGcomponentsinsafety-criticalapplications Product specific: Followallinstructionsmentionedinthedatasheet,especially:
- Thesolderprofilehastocomplywiththetechnicalrefloworwavesolderingspecification,otherwisethiswillvoidthewarranty.
- Allproductsaresupposedtobeusedbeforetheendoftheperiodof12monthsbasedontheproductdate-code.
- Violationofthetechnicalproductspecificationssuchasexceedingtheabsolutemaximumratingswillvoidthewarranty.
- Itisalsorecommendedtoreturnthebodytotheoriginalmoistureproofbagandresealthemoistureproofbagagain.
- ESDpreventionmethodsneedtobefollowedformanualhandlingandprocessingbymachinery. Disclaimer: This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governingsuchuse. MoreoverWürthElektronikeiSosGmbH&Co.KGproductsareneitherdesignednorintendedforuseinareassuch as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc. Würth Elektronik eiSos GmbH & Co. KG must be informedabouttheintentofsuchusagebeforethedesign-instage. Inaddition,sufficientreliabilityevaluationchecksforsafetymustbe performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance. These cautions and warnings comply with the state of the scientific and technical knowledge and are believed to be accurateandreliable. However,noresponsibilityisassumedforinaccuraciesorincompleteness. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 33
WPME-VDMM -VariableStepDownMicroModule
28 IMPORTANT NOTES
General Customer Responsibility SomegoodswithintheproductrangeofWürthElektronikeiSosGmbH&Co.KGcontainstatementsregardinggeneralsuitabilityforcertain applicationareas. Thesestatementsaboutsuitabilityarebasedonourknowledgeandexperienceoftypicalrequirementsconcerningthe areas, serve as general guidance and cannot be estimated as binding statements about the suitability for a customer application. The responsibility for the applicability and use in a particular customer design is always solely within the authority of the customer. Due to this fact it is up to the customer to evaluate, where appropriate to investigate and decide whether the device with the specific product characteristicsdescribedintheproductspecificationisvalidandsuitablefortherespectivecustomerapplicationornot. Accordingly,the customeriscautionedtoverifythatthedatasheetiscurrentbeforeplacingorders. Customer Responsibility Related to Specific, in Particular Safety-Relevant, Applications Ithastobeclearlypointedoutthatthepossibilityofamalfunctionofelectroniccomponentsorfailurebeforetheendoftheusuallifetime cannotbecompletelyeliminatedinthecurrentstateoftheart,eveniftheproductsareoperatedwithintherangeofthespecifications. Incertaincustomerapplicationsrequiringaveryhighlevelofsafetyandespeciallyincustomerapplicationsinwhichthemalfunctionor failureofanelectroniccomponentcouldendangerhumanlifeorhealthitmustbeensuredbymostadvancedtechnologicalaidofsuitable designofthecustomerapplicationthatnoinjuryordamageiscausedtothirdpartiesintheeventofmalfunctionorfailureofanelectronic component. Best Care and Attention Anyproduct-specificnotes,warningsandcautionsmustbestrictlyobserved. Anydisregardwillresultinthelossofwarranty. Customer Support for Product Specifications Someproductswithintheproductrangemaycontainsubstanceswhicharesubjecttorestrictionsincertainjurisdictionsinordertoserve specifictechnicalrequirements. Necessaryinformationisavailableonrequest. Inthiscasethefieldsalesengineerortheinternalsales personinchargeshouldbecontactedwhowillbehappytosupportinthismatter. Product R&D Due to constant product improvement product specifications may change from time to time. As a standard reporting procedure of the ProductChangeNotification(PCN)accordingtotheJEDEC-Standardweinformaboutminorandmajorchanges. Incaseoffurtherqueries regarding the PCN, the field sales engineer or the internal sales person in charge should be contacted. The basic responsibility of the customerasperSection1and2remainsunaffected. Product Life Cycle Duetotechnicalprogressandeconomicalevaluationwealsoreservetherighttodiscontinueproductionanddeliveryofproducts. Asa standard reporting procedure of the Product Termination Notification (PTN) according to the JEDEC Standard we will inform at an early stage about inevitable product discontinuance. According to this we cannot guarantee that all products within our product range will alwaysbeavailable. Thereforeitneedstobeverifiedwiththefieldsalesengineerortheinternalsalespersoninchargeaboutthecurrent productavailabilityexpectancybeforeorwhentheproductforapplicationdesign-indisposalisconsidered. Theapproachnamedabove doesnotapplyinthecaseofindividualagreementsdeviatingfromtheforegoingforcustomer-specificproducts. Property Rights AlltherightsforcontractualproductsproducedbyWürthElektronikeiSosGmbH&Co.KGonthebasisofideas,developmentcontracts aswellasmodelsortemplatesthataresubjecttocopyright,patentorcommercialprotectionsuppliedtothecustomerwillremainwith Würth Elektronik eiSos GmbH & Co. KG. Würth Elektronik eiSos GmbH & Co. KG does not warrant or represent that any license, either expressed or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination,application,orprocessinwhichWürthElektronikeiSosGmbH&Co.KGcomponentsorservicesareused. General Terms and Conditions Unlessotherwiseagreedinindividualcontracts,allordersaresubjecttothecurrentversionofthe“GeneralTermsandConditionsofWürth ElektronikeiSosGroup”,lastversionavailableatwww.we-online.com. DatasheetVersion1.0 ©August2025 www.we-online.com/powermodules 34