171013801

171033801 WURTH

Document overview

• Manufacturer or author: Provided By digicamel.com
• PDF pages: 37

Technical content

WPME-VDLM -VariableStepDownLGAModule 3.5V - 38V / 3A / 0.85V - 6V Output

DESCRIPTION

The VDLM series MagI3C Power Module provides a fully integrated DC-DC power supply including the switching regulator with integrated MOSFETs, controller and compensation, as well as the shielded inductorinonepackage. The 171033801 offers high efficiency and delivers up to 3A of output current. It operates with an input voltage from 3.5V to 38V and is designed for a small solutionsize. The module maintains high efficiency throughout the output current range by automatically transitioning betweenoperatingmodesbasedontheloaddemands. The 171033801 is available in an LGA-12EP package (10x6x3.1mm). This module has integrated protection circuitry that guards against thermal overstress with thermal shutdown and protects against electrical damage using overcurrent, overvoltage, short circuit and undervoltageprotections. TYPICAL APPLICATIONS

• Point-of-LoadDC-DCapplications
• Industrial, test and measurement, medical

applications

• DSPs,FPGAs,MCUsandMPUssupply
• I/Ointerfacepowersupply TYPICAL CIRCUIT DIAGRAM

FEATURES

• Peakefficiencyupto96%
• Currentcapabilityupto3A
• Inputvoltagerange: 3.5Vto38V
• Outputvoltagerange: – 0.85Vto6Vat3A – 0.85Vto13Vat2.5A
• 3.5µAtypicalquiescentcurrent
• Integratedshieldedinductor
• Adjustableswitchingfrequency
• Currentmodecontrol
• Synchronousoperation
• Undervoltagelockout
• Embeddedsoft-start
• Powergoodindicator
• SpreadspectrumforoptimizedEMIperformance
• Thermalshutdown
• Short circuit, overcurrent, and overvoltage protections
• Cycle-by-cyclecurrentlimit
• RoHSandREAChcompliant
• Operatingambienttemp. range: -40°Cto105°C
• Operatingjunctiontemp. range: -40°Cto125°C
• Complies with EN55032 class B conducted and radiatedemissionsstandard DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 1

WPME-VDLM -VariableStepDownLGAModule PINOUT AGND SYMBOL NUMBER TYPE DESCRIPTION FSW 1 Input Switchingfrequencyselectionpin. Connectanexternalresistortoselect theswitchingfrequency. TheresistorcanbeconnectedtoAGNDtodisable spreadspectrumbehavior. TheresistorcanbeconnectedtoVCCtoenable spreadspectrumbehavior. FB 2 Input Feedbackpintotheinternalerroramplifier. Thispinmustbeconnectedto theexternalresistordividertoadjusttheoutputvoltage. VCC 3 Power VCCpin. ThispinisattachedtotheoutputoftheinternalLDO.Connecta ceramiccapacitorof1µFtoVCCandAGND.VCCbeattachedtoFSWusing aseriesresistor,R SW. Itshouldnotbeusedtopowerotherapplication functions. VIN 4,5 Power Inputvoltagepins. Usedforinputpowersupplyconnection. Placetheinput capacitorascloseaspossibletoVINandPGND. VOUT 6,7 Power Outputvoltagepins. PlaceoutputcapacitorsascloseaspossibletoVOUT andPGND.Forthermalperformanceusecopperplane(s)atthispin. DNC 8 Thispinmustbeleftfloating. VIN 9 Power Inputvoltagepin. InternallyconnectedtoVIN,canbeusedtosupplyPG andENpin. NoneedtoconnectexternallytoVINtrace(pin4andpin5). AGND 10 Power Analoggroundpin. UsethispinasgroundforFSW,VCCandPGpins. PG 11 Output Powergoodflagpin. Thisopendrainoutputassertslowiftheoutput voltageisoutofregulation. Apull-upresistorof1M Ω isrequiredifthis functionisused. EN 12 Input Enablepin. Thispinhasaninternalvoltagedividerthatsetstheinternal UVLOvalue. PullthispindowntoAGNDtodisablethemodule. PGND 13(EP) Power ExposedPad. ThispinisinternallyconnectedtoPGND.Itisrecommended toconnectthispintothegroundplane(s)forheatdissipation. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 2

WPME-VDLM -VariableStepDownLGAModule

ORDERING INFORMATION

ORDER CODE SPECIFICATIONS PACKAGE PACKAGING UNIT 171033801 3A/0.85V-6VVoutversion LGA-12EP 13”Reel(1000pieces) 178033801 3A/0.85V-6VVoutversion EvalBoard 1piece PIN COMPATIBLE FAMILY MEMBERS ORDER CODE SPECIFICATIONS PACKAGE PACKAGING UNIT 171013801 1A/0.85V-13VVoutversion LGA-12EP 13”Reel(1000pieces) 171023801 2A/0.85V-13VVoutversion LGA-12EP 13”Reel(1000pieces) SALES INFORMATION SALES CONTACT WürthElektronikeiSosGmbH&Co.KG EMCandInductiveSolutions Max-Eyth-Str. 1 74638Waldenburg Germany Tel. +49(0)79429450 www.we-online.com/powermodules Technicalsupport: powermodules@we-online.com DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 3

WPME-VDLM -VariableStepDownLGAModule ABSOLUTE MAXIMUM RATINGS Caution: Exceedingthelistedabsolutemaximumratingsmayaffectthedevicenegativelyandmaycausepermanentdamage. SYMBOL PARAMETER LIMIT UNITMIN(1) MAX(1) VIN InputPinVoltage -0.3 42 V VOUT OutputPinVoltage -0.3 VIN +0.3 V FB FeedbackPinVoltage -0.3 8 V EN EnablePinVoltage -0.3 VIN +0.3 V PG PowerGoodPinVoltage -0.3 VIN +0.3 V VCC VCCpinvoltagewithinputvoltagefrom3.7Vto38V -0.3 4 V VCCpinvoltagewithinputvoltagefrom3.5Vto3.7V -0.3 VIN +0.3 V FSW Switchingfrequencyselectionpin -0.3 VCC +0.3 V Tstorage Assembled,non-operatingstoragetemperature -40 125 °C VESD ESDVoltage(HBM),allpins(C=100pFR=1.5k Ω) -2 2 kV OPERATING CONDITIONS Operatingconditionsareconditionsunderwhichthedeviceisintendedtobefunctional. AllvaluesarereferencedtoGND. MINandMAXlimitsarevalidfortherecommendedambienttemperaturerangeof-40°Cto105°C.Typicalvaluesrepresents statisticallytheutmostprobablevaluesatthefollowingconditions: V IN =24V,V OUT =5V,C IN =2x4.7µFceramic,C OUT =47µF ceramic,TA =25°Cunlessotherwisenoted. SYMBOL PARAMETER MIN(1) TYP(2) MAX(1) UNIT VIN InputVoltage 3.5 - 38 V VOUT OutputVoltage(MaximumI OUT =2.5A) 0.85 - 13 V OutputVoltage(MaximumI OUT =3A) 0.85 - 6 V Ta Ambienttemperaturerange -40 - 105 °C Tjop Junctiontemperaturerange -40 - 125 °C IOUT Outputcurrent - - 3 A THERMAL SPECIFICATIONS Typicalvaluesrepresentsstatisticallytheutmostprobablevaluesatthefollowingconditions: V IN =24V,V OUT =5V,C IN =2x 4.7µFceramic,C OUT =47µFceramic,T A =25°Cunlessotherwisenoted. SYMBOL PARAMETER TYP(2) UNIT ΘJA Junction-to-ambientthermalresistance (3) 34 K/W ΘJC Junction-to-case(top)thermalresistance (3) 17 K/W TSD Thermalshutdown,rising 165 °C Thermalshutdown,hysteresis 30 °C DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 4

WPME-VDLM -VariableStepDownLGAModule ELECTRICAL SPECIFICATIONS MINandMAXlimitsarevalidfortherecommendedambienttemperaturerangeof-40°Cto105°C.Typicalvaluesrepresents statisticallytheutmostprobablevaluesatthefollowingconditions: V IN =24V,V OUT =5V,C IN =2x4.7µFceramic,C OUT =47µF ceramic,TA =25°Cunlessotherwisenoted. SYMBOL PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT VUVLO VIN risingthreshold 2.3 - 3.3 V VIN fallingthreshold 2.15 - 3.15 V IOC Overcurrentlimit Noslopecontribution - 4.6 - A TON_MIN Minimumon-time - 75 - ns Enable VEN Enablethreshold Rising 1.08 1.2 1.32 V Hysteresis - 0.2 - V VCC Regulator VCC LDOoutputvoltage 3 3.3 3.6 V Input Quiescent, No Load and Shutdown Current ISD ShutdowncurrentfromV IN VEN =GND - 2 - µA IQ QuiescentcurrentfromV IN VOUT≤ 3.2V,noswitching 20 35 60 µA VOUT> 3.2V,noswitching 1 3.5 6 µA IIN-NL Noloadinputcurrent VOUT=3.3V - 15.3 - µA Output Voltage VFB Voltagereference TJ =-40°C ≤ TJ ≤ 125°C 0.842 0.85 0.858 V Soft-Start tSS Soft-starttime RisingedgetoV OUT (nom.) 1 1.3 1.6 ms Switching Frequency fSW Switchingfrequency 200 - 2200 kHz Power Good VPG PowergoodV OUT thresholdlow TJ =-40°C ≤ TJ ≤ 125°C 87 90 93 % VPG PowergoodV OUT_H threshold TJ =-40°C ≤ TJ ≤ 125°C - 120 - % VPG_HYS PowergoodV OUT threshold hysteresis - 3 - % Efficiency η Efficiency VIN =12V,V OUT =3.3V, IOUT =3A - 87 - % VIN =12V,V OUT =5V, IOUT =3A - 87 - % VIN =24V,V OUT =5V, IOUT =3A - 86 - % DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 5

WPME-VDLM -VariableStepDownLGAModule RoHS, REACh RoHS directive Directive2011/65/EUoftheEuropeanParliamentandtheCouncilof June8th,2011ontherestrictionoftheuseofcertainhazardous substancesinelectricalandelectronicequipment. REACh directive Directive1907/2006/EUoftheEuropeanParliamentandtheCouncilof June1st,2007regardingtheRegistration,Evaluation,Authorization andRestrictionofChemicals(REACh). PACKAGE SPECIFICATIONS Part Number Lead Finish Material WEIGHT 171033801 ENEPIG 0.78g NOTES (1) MinandMaxlimitsare100%productiontestedat25°C.Limitsovertheoperatingtemperaturerangeareguaranteed throughcorrelationusingStatisticalQualityControl(SQC)methods. (2) Typical numbers are valid at 25°C ambient temperature and represent statistically the utmost probable values assumingaGaussiandistribution. (3) Measuredonthe178033801evaluationboard,a80x80mmfourlayerboard,with70µm(2ounce)copper. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 6

WPME-VDLM -VariableStepDownLGAModule TYPICAL PERFORMANCE CURVES Ifnototherwisespecified,thefollowingconditionsapply: V IN =24V;C IN =2x4.7µFX7R50Vceramic(885012209048);C OUT =47µFX5Rceramic;T A =25°C. RADIATED EMISSIONS EN55032 (CISPR-32) CLASS B COMPLIANT TEST SETUP

• MeasuredwithmoduleonanEvaluationBoard178033801inaFullyAnechoicRoom(FAR)at3mantennadistance.
• Measurementinputwirelength: 160cm(80cmHorizontal+80cmVertical)
• Outputwirelength: 1m
• Resistorasload CONDUCTED EMISSIONS EN55032 (CISPR-32) CLASS B COMPLIANT TEST SETUP
• Measurementinputwirelength: 80cm
• Outputwirelength: 1m
• Resistorasload CONDUCTED EMISSIONS - FIXED FREQUENCY DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 7

WPME-VDLM -VariableStepDownLGAModule CONDUCTED EMISSIONS - SPREAD SPECTRUM RADIATED EMISSIONS - FIXED FREQUENCY DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 8

WPME-VDLM -VariableStepDownLGAModule RADIATED EMISSIONS - SPREAD SPECTRUM DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 9

WPME-VDLM -VariableStepDownLGAModule EFFICIENCY 12Vin 100 0.5 1.5 2.5 Efficiency [%] Output Current [A] 171033801 V IN = 12V, T A = 25 C Vout = 5V Vout = 3.3V Vout = 2.5V Vout = 1.8V Vout = 1.2V Vout = 0.85V EFFICIENCY 24Vin DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 10

WPME-VDLM -VariableStepDownLGAModule POWER DISSIPATION 12Vin 0.25 0.5 0.75 1.25 1.5 1.75 0.5 1.5 2.5 Power Dissipation [W] Output Current [A] 171033801 V IN = 12V, T A = 25 C Vout = 5V Vou = 3.3V Vout = 2.5V Vout = 1.8V Vout = 1.2V Vout = 0.85V POWER DISSIPATION 24Vin DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 11

WPME-VDLM -VariableStepDownLGAModule THERMAL DERATING 12Vin 0.5 1.5 2.5 3.5 -40 -35 -30 -25 -20 -15 -10 100 105 Output Current [A] Operating Temperature [ Output Current Thermal Derating V IN = 12V, V OUT = 5V THERMAL DERATING 24Vin Note: Boththermalderatinggraphsweremeasuredonthe178033801EvaluationBoard(80x80mm,fourlayers,70µm copperthickness). PleaseseeT A limitsinOperatingConditionsonpage4. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 12

WPME-VDLM -VariableStepDownLGAModule LOAD REGULATION 1.8Vout 1.79 1.795 1.8 1.805 1.81 1.815 1.82 1.825 1.83 1.835 1.84 0.5 1.5 2.5 Output Voltage [V] Output Current [A] 171033801 V OUT = 1.8V, T A = 25 C Vin = 24V Vin = 12V LOAD REGULATION 3.3Vout 3.3 3.32 3.34 3.36 3.38 3.4 0.5 1.5 2.5 Output Voltage [V] Output Current [A] 171033801 V OUT = 3.3V, T A = 25 C Vin = 24V Vin = 12V DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 13

WPME-VDLM -VariableStepDownLGAModule LOAD REGULATION 5Vout 5.05 5.07 5.09 5.11 5.13 5.15 5.17 0.5 1.5 2.5 Output Voltage [V] Output Current [A] 171033801 V OUT = 5V, T A = 25 C Vin = 24V Vin = 12V LINE REGULATION 1.8Vout 1.78 1.79 1.8 1.81 1.82 1.83 1.84 3.5 8.5 13.5 18.5 23.5 28.5 33.5 Output Voltage [V] Input Voltage [V] 171033801 V OUT = 1.8V, T A = 25 C Iout = 300mA Iout = 3A DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 14

WPME-VDLM -VariableStepDownLGAModule LINE REGULATION 3.3Vout 3.3 3.32 3.34 3.36 3.38 3.4 Output Voltage [V] Input Voltage [V] 171033801 V OUT = 3.3V, T A = 25 C Iout = 300mA Iout = 3A LINE REGULATION 5Vout 5.04 5.06 5.08 5.1 5.12 5.14 5.16 Output Voltage [V] Input Voltage [V] 171033801 V OUT = 5V, T A = 25 C Iout = 300mA Iout = 3A DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 15

WPME-VDLM -VariableStepDownLGAModule BLOCK DIAGRAM CIRCUIT DESCRIPTION The WPME-VDLM 171033801 MagI3C Power Module is a DC-DC power supply including the switching regulator with integratedMOSFETs,controllerandcompensation,aswellastheshieldedinductorintegratedinonepackage. Thecontrol schemeisbasedonacurrentmode(CM)regulationloop. The VOUT of the regulator is divided by the feedback resistor network RFBT and RFBB and fed into the FB pin. The error amplifiercomparesthissignalwiththeinternal0.85Vreference. Theerrorsignalisamplifiedandcontrolstheon-timeofa fixedfrequencypulsewidthgenerator. ThissignaldrivesthepowerMOSFETs. The current mode architecture features a constant frequency during load steps. Only the on-time is modulated. It is internallycompensatedandstablewithlowESRoutputcapacitorsandrequiresnoexternalcompensationnetwork. Thisarchitecturesupportsfasttransientresponseandverysmalloutputvoltageripples(<10mV p-p)areachieved. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 16

WPME-VDLM -VariableStepDownLGAModule DESIGN FLOW Thefollowingsimplestepswillshowhowtoselecttheexternalcomponentstodesignthe171033801intoanapplication. Essential Steps 1. Setoutputvoltage 2. Selectinputcapacitor 3. Selectoutputcapacitor 4. SelectVCC capacitor 5. Setswitchingfrequency Optional Steps 6. Setpowergood DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 17

WPME-VDLM -VariableStepDownLGAModule STEP 1 Setting the Output Voltage (VOUT) TheoutputvoltageisselectedwithanexternalresistordividerbetweenV OUT andGND(seecircuitbelow). Thevoltageacross thelowerresistorofthedividerisprovidedtotheFBpinandcomparedwithareferencevoltageof0.85V(V REF). Theoutput voltageadjustmentrangeisfrom0.85Vto6V.Theoutputvoltagecanbecalculatedaccordingtothefollowingformula: V OUT = V REF · ( RFBT RFBB + 1) (1) Oneresistormustbechosenandthentheotherresistorcanbecalculated. Forexample,ifR FBT =402kΩ thentheresistance valueofthelowerresistorinthefeedbacknetworkisindicatedinthetablebelowforcommonoutputvoltages. RFBB (E96) (kΩ) Open 976 357 205 137 80.6 41.2 30.1 *Notethatforoutputvoltagesabove6V,theoutputcurrentmaynotexceed2.5A. V OUT PGND VOUT R FBT MODULE R FBB FB STEP 2 Select the Input Capacitor (CIN) The energy at the input of the Module is stored in the input capacitor. An input capacitor (10µF) is required externally to provide cycle-by-cycle switching current and to support load transients. The external input capacitor must be placed directly at the VIN pin. For this MagI3C Module it is recommended to use a MLCC (multi-layer ceramic capacitor) of 10µF. Attentionmustbepaidtothevoltage,frequencyandtemperaturederatingsandthermalclassoftheselectedcapacitor. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 18

WPME-VDLM -VariableStepDownLGAModule STEP 3 Select the Output Capacitor (COUT) Theoutputcapacitorshouldbeselectedinordertominimizetheoutputvoltagerippleandtoprovideastablevoltageatthe output. Italsoaffectstheloopstability. Differentoutputcapacitorsarerecommendeddependingontheoutputvoltageand switchingfrequencyselectedforanapplication. Theexternalcomponentssectionprovidesevaluatedrecommendationsof componentsforvarioustypicalapplicationspecifications. Attentionmustbepaidtothevoltage,frequencyandtemperature deratingandthermalclassoftheselectedcapacitor. Ingeneral,theoutputvoltageripplecanbecalculatedusingthefollowingequation: V OUTripple = ∆IL · ESR + ∆IL · ( 1 8 · fSW · COUT ) (2) where∆IL istheinductorcurrentrippleandcanbecalculatedwiththefollowingequation: ∆IL = V OUT · (V IN − V OUT) fSW · L · V IN (3) DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 19

WPME-VDLM -VariableStepDownLGAModule STEP 4 Select the VCC Capacitor (CVCC) The 171033801 MagI3C Module requires a capacitor, CVCC, to be placed at the VCC pin to support the internal LDO integratedinsideofthemodule. Toensurestableoperationandoptimumperformanceacrosstheentirefunctionalrange,a 1µF capacitor is recommended. The Würth Elektronik eiSos capacitors have been experimentally evaluated for performanceandistherecommendedchoice. STEP 5 Select the Switching Frequency (fSW) The switching frequency must be selected according to the input voltage, output voltage and load current for the best performance in loop regulation and transient response. This is done by choosing a resistor value from the table below based on the application conditions. This resistor can either be tied directly to AGND for a fixed switching frequency, indicatedinthetablebelow, oritcanbetiedtoVCCallowforspreadspectrumoperation. Spreadspectrumoperationwill allow for a change in switching frequency typically of± 5%. The peaks of the switching spectrum will be reduced and spread, reducing the filter necessary to comply to EN55032 Radiated and Conducted Standards. The difference in EMI behaviorcanbeseenintheEMIsectionofthedatasheet. Switching Frequency (kHz) 200 400 400 500 700 700 RSW (kΩ) 1.8 0 0 3.3 5.6 5.6 WhenRSW isindicatedas0k Ω,FSWshouldbetieddirectlytoAGNDorVCC. STEP 6 Set Power Good Resistor ThePGpinisan open-drainoutput. Oncetheoutput voltageisabove90% (typ.) oftheinternalreferencevoltage, thePG pintransitionstoahighimpedancestate. Therecommendedpull-upresistorvalueis1M Ω,whichshouldbeconnectedto avoltagesourcesuchasVIN.ThePGpinispulledlowwhentheoutputvoltageislowerthan90%(typ.) orhigherthan120% (typ.) oftheinternalreferencevoltage. ThePGpinwillbepulledlowwhentheUVLOorthermalshutdownactivatesorwhen theENpinispulledlow. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 20

WPME-VDLM -VariableStepDownLGAModule MODES OF OPERATION The171033801 Modulehas twodifferentmodes of operationand thetransition takesplaceautomatically dependingon the load current value. Under light load conditions, the module operates in PFM mode where the Module runs at a lower switching frequency to reduce the current consumption, which leads to achieving a higher efficiency. The PFM control is achieved by creating a single pulse to turn on the high side switch while monitoring the inductor current. The high side switchiskeptonuntiltheinductorcurrenthitsapresetvalueof600mA(typ.). After reaching this value, the high side switch is turned off and the low side switch turns on. The inductor current decreases until it reaches zero. When the inductor current reaches zero, both switches are turned off (idle time) and the outputcapacitorsolelysuppliestheloadwithenergy. Whiletheenergyissuppliedtotheload,theoutputvoltagestartsto drop. TheModulemonitorstheoutputvoltageripplevalueandwhenithitsacertainlimit,whilethetwoswitchesareoff, anotherpulseisinitiatedandthecyclerepeats. Whentheloadcurrentincreases,theidletimedecreasesandtheswitching frequencyincreasesuntilthenominalswitchingfrequencyisreachedandtheModuletransitionstoPWMmode. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 21

WPME-VDLM -VariableStepDownLGAModule OUTPUT VOLTAGE RIPPLE IfthemoduleisworkinginPWMmode,theoutputvoltagerippleisverylowandisdeterminedbytheswitchingfrequency, which is set by the resistor RSW. If the load current is low enough to be in the PFM mode of operation then the output voltageripplewillbehigherwithafrequencylowerthanthenominalswitchingfrequency(seepicturesbelow). PFM Operation PWM Operation DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 22

WPME-VDLM -VariableStepDownLGAModule PROTECTION FEATURES Overcurrent Protection (OCP) and Short Circuit Protection (SCP) The 171033801 MagI3C Module implements a cycle-by-cycle current limit, which is realized through the peak current mode control architecture of the module. The peak current of the high side switch and the valley current of the low side switch are both monitored. Additionally, limiting the valley current during an overcurrent scenario reduces the thermal stressesgeneratedinsideofthepowermodulebyreducingthermscurrentvalue. By monitoring both switch currents the user can be confident that the power module will be well protected against overcurrent and short circuit scenarios even in the most extreme conditions of operation, such as very high or low duty cycles. Underverylowdutycycleconditions,thepeakcurrentcanexceedtheovercurrentpresetvalue. Whenthisoccurs, thelowsideswitchisturnedonuntilthecurrentdropsbelowthepresetvalleycurrentvalue. Thisbehaviormayresultin pulse skipping, temporarily decreasing the effective switching frequency in order to better protect the module during overcurrentscenarios. The inductor current exceeding the peak protection value will only take place if the minimum on-time stated in the ELECTRICAL SPECIFICATIONS is violated. Even in such a scenario, the power module will still be protected. Following the recommended switching frequencies stated in Step 5 of the DESIGN FLOW will always ensure the minimum on-time is maintained. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 23

WPME-VDLM -VariableStepDownLGAModule DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 24

WPME-VDLM -VariableStepDownLGAModule Output Overvoltage Protection (OVP) The MagI3C Module integrates an output overvoltage protection feature. This feature is implemented by monitoring the feedback pin and comparing it to the internal reference. When the feedback pin voltage is 20% higher than the reference voltage,thelowsideswitchisturnedontodischargetheoutputcapacitor. Thereisalsoanegativecurrentlimitsetonthe lowsideswitchtopreventovercurrentstresswhenthisprotectionfeatureactivates. This feature protects the module during specific application scenarios such as when the module is connected to a switchingloadwithlongwiresorbackfeedingfromotherloadssharingthesamevoltagenodeoccurs. Over Temperature Protection (OTP) Thermal protection helps prevent catastrophic failures due to accidental device overheating. The junction temperature of the MagI3C Module should not be allowed to exceed its maximum ratings. Thermal protection is implemented by an internalthermalshutdowncircuit,whichactivateswhenthejunctiontemperaturereaches165°C(typ). Underthethermal shutdown condition both MOSFETs remain off, causing the output voltage to drop. When the junction temperature falls below135°C(typ)theinternalsoftstartisreleased,V OUT risessmoothly,andnormaloperationresumes. Input Undervoltage Lockout (UVLO) The device incorporates input undervoltage lockout (UVLO) to protect from unexpected behavior at input voltages below therecommendedvalues. ThethresholdsoftheUVLOareindicatedintheELECTRICALSPECIFICATIONS. Soft Start TheMagI3CModuleimplementsaninternalsoftstartinordertolimittheinrushcurrentandavoidoutputvoltageovershoot duringstart-up. Thetypicaldurationofthesoftstartisaround1.3ms(seefigurebelow). DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 25

WPME-VDLM -VariableStepDownLGAModule Enable/Adjustable UVLO TheMagI3CModuleisenabledbysettingtheENpinhigh. WhentheENvoltagereaches1.2Vthemodulebeginsswitching and the internal soft start regulates the output voltage rise until the desired output voltage is met, allowing normal operationtotakeplace. The UVLO threshold of the power module can be externally set by adding a resistor between VIN and EN and a second resistor between EN and GND. This voltage divider should be chosen so that the desired minimum input voltage correspondsto1.2VatEN. Thetworesistorsshouldbechosenbasedonthefollowingratio: RENT RENB = V UVLO(EXT.) 1.2 − 1 (4) VUVLO(EXT.) =Userprogrammableinputvoltagethresholdtoenableanddisablethemodule Thisisoftenusedinbattery-poweredsystemstopreventdeepdischargeofthesystembattery. Itisalsousefulinsystem designs with 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 benefit by using the precision Enable threshold to establish a system undervoltage lockout basedonspecificapplicationparameters. Inthecaseofsequencingsupplies,thedividerisconnectedtoarailthatbecomesactiveearlierinthepower-upcyclethan theMagI3CModuleoutputrail. TherecommendedapproachistochooseaninputUVLOlevelthatishigherthanthetarget regulatedoutputvoltageforthestage. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 26

WPME-VDLM -VariableStepDownLGAModule LAYOUT RECOMMENDATION Layout recommedation for fixed frequency operation VOUT Theimagesaboveshowthetopandbottomroutedouterlayersforarecommendedfourlayerlayout. Therearetwointernal GNDlayersthatarenotpicturedabove. Thesearenecessaryforoptimalthermalperformance. The pictures above show a possible layout for the 171033801 MagI3C Module. Nevertheless, some recommendations shouldbefollowedwhendesigningthelayout: 1. TheinputandoutputcapacitorsshouldbeplacedascloseaspossibletotheVINandVOUTpinsofthedevice. 2. ThefeedbackresistordividershouldbeplacedascloseaspossibletotheFBpin. 3. Avoidplacingviasinanyofthepadsforthemodule. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 27

WPME-VDLM -VariableStepDownLGAModule RECOMMENDED EXTERNAL COMPONENTS VOUT (V) FSW* (kHz) RFBT (kΩ) RFBB (kΩ) RPG (MΩ) RSW (kΩ) CIN (µF) COUT (µF) CVCC (µF) 0.85 200 402 Open 1 1.8 2x4.7µF,50V 440µF,6.3V 1µF,16V 1.2 400 402 976 1 0 2x4.7µF,50V 200µF,6.3V 1µF,16V 1.8 400 402 357 1 0 2x4.7µF,50V 200µF,6.3V 1µF,16V 2.5 500 402 205 1 3.3 2x4.7µF,50V 100µF,6.3V 1µF,16V 3.3 700 402 137 1 5.6 2x4.7µF,50V 47µF,6.3V 1µF,16V 5 700 402 80.6 1 5.6 2x4.7µF,50V 47µF,10V 1µF,16V Würth Elektronik Part Number/Family 885012209048 WCAP-CSGP andWCAP-PSLP 885012207051 *Recommendedswitchingfrequencyvaluesforoptimummoduleoperation. Stablemoduleoperationcanalsobeachieved withdifferentswitchingfrequencies;however,areductionofthemoduleperformanceispossible. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 28

WPME-VDLM -VariableStepDownLGAModule FILTER SUGGESTION Theinputfiltershownintheschematicbelowisrecommendedtoachieveconductedandradiatedcomplianceaccordingto EN55032ClassB(seealso RADIATEDANDCONDUCTEDTYPICALPERFORMANCECURVES ). VIN Cf Lf GND Input LC Filter VIN GND Power Module+ Designator Description Order Code Manufacturer Cf 2xFilterceramiccapacitor4.7µF,X7R,50V 885012209048 WE Lf Filterinductor10µH,PD2family,I SAT =2.5A,I R =2.2A 74477410 WE DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 29

WPME-VDLM -VariableStepDownLGAModule HANDLING RECOMMENDATIONS 1. The power module is classified as MSL3 (JEDEC Moisture Sensitivity Level 3) and requires special handling due to moisturesensitivity(JEDECJ-STD033D). 2. Thepartsaredeliveredinasealedbag(MoistureBarrierBags=MBB)andshouldbeprocessedwithinoneyear. 3. Whenopeningthemoisturebarrierbag,checktheHumidityIndicatorCard(HIC)forcolorstatus. Bakepartspriorto solderingincaseindicatorcolorhaschangedaccordingtothenotesonthecard. 4. Partsmustbeprocessedafter168hour(7days)offloorlife. Oncethistimehasbeenexceeded,bakepartspriorto solderingperJEDECJ-STD033Drecommendation. 5. Maximumnumberofsoldercyclesistwo. 6. Forminimumrisk,solderthemoduleinthelastsoldercycleofthePCBproduction. 7. Forsolderingprocesspleaseconsiderleadmaterialcopper(Cu)andleadfinishtin(Sn). 8. ForsolderpasteuseastandardSACAlloysuchasSAC305,type3orhigher. 9. Theprofilebelowisvalidforconvectionreflowonly. 10. Othersolderingmethods(e.g. vaporphase)arenotverifiedandhavetobevalidatedbythecustomerattheirownrisk. SOLDER PROFILE Table1: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 Peakpackagebodytemperature TP TP ≤ 250°C Timewithin5°Cofactualpeak temperature tP tP ≤ 30seconds Ramp-upRate(T L toTp) 3°C/secondmaximum Ramp-downrate(T p toTL) 6°C/secondmaximum Time25°Ctopeaktemperature 8minutesmaximum PleaserefertoJEDECJ-STD020Eforfurtherinformationpertainingtoreflowsolderingofelectroniccomponents. Temperature [°C] Time [Seconds] tL tS Ts_min Ts_max TP TL tP DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 30

WPME-VDLM -VariableStepDownLGAModule PHYSICAL DIMENSIONS Bottom view All dimensions in mm Tolerances ±0,1mm unless otherwise specified DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 31

WPME-VDLM -VariableStepDownLGAModule EXAMPLE LANDPATTERN DESIGN All dimensions in mm Stencilthicknessof100µm. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 32

WPME-VDLM -VariableStepDownLGAModule PACKAGING Tape (mm) End Feeding direction Start Cover Tape E1 T Top Cover Tape W F P1D1 D0 P2 Carrier Tape No Component min. 160mm Components No Component min. 100mm Cover Tape min. 400mm A A Tape Type A0 B0 W T T1 T2 K0 P0 P1 P2 D0 D1 E1 E2 F Material DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 33

WPME-VDLM -VariableStepDownLGAModule Reel (mm) A B C D N W1 W2 W3 Material DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 34

WPME-VDLM -VariableStepDownLGAModule DOCUMENT HISTORY Revision Date Description Comment

1.0 February2022 Initialdatasheetrelease

1.1 March2022 Correctionofcomponentvalues

1. Feedback resistor value for 5Vo corrected 2. CffremovedfromEMIconditions

1.2 October2022 Updateddesignexamplelayoutpictures

DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 35

WPME-VDLM -VariableStepDownLGAModule CAUTIONS AND WARNINGS The following conditions apply to all goods within the product series of MagI3C of Würth Elektronik eiSos GmbH & Co. KG: General:

• Allrecommendationsaccordingtothegeneraltechnicalspecificationsofthedata-sheethavetobecompliedwith.
• Theusageandoperationoftheproductwithinambientconditionswhichprobablyalloyorharmthecomponentsurface hastobeavoided.
• The responsibility for the applicability of customer specific products and use in a particular customer design is always withintheauthorityofthecustomer. Alltechnicalspecificationsforstandardproductsdoalsoapplyforcustomerspecific products
• Residualwashingvarnishagentthatisusedduringtheproductiontocleantheapplicationmightchangethecharacteristics ofthebody,pinsortermination. Thewashingvarnishagentcouldhaveanegativeeffectonthelongtermfunctionofthe product. Directmechanicalimpacttotheproductshallbepreventedasthematerialofthebody,pinsorterminationcould flakeorintheworstcaseitcouldbreak. Asthesedevicesaresensitivetoelectrostaticdischargecustomershallfollow properICHandlingProcedures.
• Customer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-relatedrequirementsconcerningitsproducts,andanyuseofWürthElektronikeiSosGmbH&Co.KGcomponents in its applications, notwithstanding any applications-related information or support that may be provided by Würth ElektronikeiSosGmbH&Co.KG.
• Customer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipatedangerousconsequencesoffailures,monitorfailuresandtheirconsequenceslessenthelikelihoodoffailures thatmightcauseharmandtakeappropriateremedialactions
• CustomerwillfullyindemnifyWürthElektronikeiSosanditsrepresentativesagainstanydamagesarisingoutoftheuse ofanyWürthElektronikeiSosGmbH&Co.KGcomponentsinsafety-criticalapplications Product specific: Followallinstructionsmentionedinthedatasheet,especially:
• The solder profile has to comply with the technical reflow or wave soldering specification, otherwise this will void the warranty.
• Allproductsaresupposedtobeusedbeforetheendoftheperiodof12monthsbasedontheproductdate-code.
• Violationofthetechnicalproductspecificationssuchasexceedingtheabsolutemaximumratingswillvoidthewarranty.
• Itisalsorecommendedtoreturnthebodytotheoriginalmoistureproofbagandresealthemoistureproofbagagain.
• ESDpreventionmethodsneedtobefollowedformanualhandlingandprocessingbymachinery. Disclaimer: Thiselectroniccomponenthasbeendesignedanddevelopedforusageingeneralelectronicequipmentonly. Thisproductis notauthorizedforuseinequipmentwhereahighersafetystandardandreliabilitystandardisespeciallyrequiredorwhere afailureoftheproductisreasonablyexpectedtocauseseverepersonalinjuryordeath,unlessthepartieshaveexecutedan agreementspecificallygoverningsuchuse. MoreoverWürthElektronikeiSosGmbH&Co.KGproductsareneitherdesigned norintendedforuseinareassuchasmilitary,aerospace,aviation,nuclearcontrol,submarine,transportation(automotive control,traincontrol,shipcontrol),transportationsignal,disasterprevention,medical,publicinformationnetworketc. Würth ElektronikeiSosGmbH&Co.KGmustbeinformedabouttheintentofsuchusagebeforethedesign-instage. Inaddition, sufficientreliabilityevaluationchecksforsafetymustbeperformedoneveryelectroniccomponentwhichisusedinelectrical circuitsthatrequirehighsafetyandreliabilityfunctionsorperformance. Thesecautionsandwarningscomplywiththestate ofthescientificandtechnicalknowledgeandarebelievedtobeaccurateandreliable. However,noresponsibilityisassumed forinaccuraciesorincompleteness. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 36

WPME-VDLM -VariableStepDownLGAModule IMPORTANT NOTES General Customer Responsibility Some goods within the product range of Würth Elektronik eiSos GmbH & Co. KG contain statements regarding general suitabilityforcertainapplicationareas. Thesestatementsaboutsuitabilityarebasedonourknowledgeandexperienceof typical requirements concerning the 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 appropriatetoinvestigateanddecidewhetherthedevicewiththespecificproductcharacteristicsdescribedintheproduct specificationisvalidandsuitablefortherespectivecustomerapplicationornot. Accordingly,thecustomeriscautionedto verifythatthedatasheetiscurrentbeforeplacingorders. Customer Responsibility Related to Specific, in Particular Safety-Relevant, Applications Ithastobeclearlypointedoutthatthepossibilityofamalfunctionofelectroniccomponentsorfailurebeforetheendofthe usuallifetimecannotbecompletelyeliminatedinthecurrentstateoftheart,eveniftheproductsareoperatedwithinthe rangeofthespecifications. Incertaincustomerapplicationsrequiringaveryhighlevelofsafetyandespeciallyincustomer applications in which the malfunction or failure of an electronic component could endanger human life or health it must beensuredbymostadvancedtechnologicalaidofsuitabledesignofthecustomerapplicationthatnoinjuryordamageis causedtothirdpartiesintheeventofmalfunctionorfailureofanelectroniccomponent. Best Care and Attention Anyproduct-specificnotes,warningsandcautionsmustbestrictlyobserved. Anydisregardwillresultinthelossofwarranty. Customer Support for Product Specifications Some products within the product range may contain substances which are subject to restrictions in certain jurisdictions inordertoservespecifictechnicalrequirements. Necessaryinformationisavailableonrequest. Inthiscasethefieldsales engineerortheinternalsalespersoninchargeshouldbecontactedwhowillbehappytosupportinthismatter. Product R&D Due to constant product improvement product specifications may change from time to time. As a standard reporting procedure of the Product Change Notification (PCN) according to the JEDEC-Standard we inform about minor and major changes. IncaseoffurtherqueriesregardingthePCN,thefieldsalesengineerortheinternalsalespersoninchargeshould becontacted. ThebasicresponsibilityofthecustomerasperSection1and2remainsunaffected. Product Life Cycle Due to technical progress and economical evaluation we also reserve the right to discontinue production and delivery of products. AsastandardreportingprocedureoftheProductTerminationNotification(PTN)accordingtotheJEDECStandard we will inform at an early stage about inevitable product discontinuance. According to this we cannot guarantee that all productswithinourproductrangewillalwaysbeavailable. Thereforeitneedstobeverifiedwiththefieldsalesengineeror the internal sales person in charge about the current product availability expectancy before or when the product for application design-in disposal is considered. The approach named above does not apply in the case of individual agreementsdeviatingfromtheforegoingforcustomer-specificproducts. Property Rights AlltherightsforcontractualproductsproducedbyWürthElektronikeiSosGmbH&Co.KGonthebasisofideas,development contracts as well as models or templates that are subject to copyright, patent or commercial protection supplied to the customerwillremainwithWürthElektronikeiSosGmbH&Co.KG.WürthElektronikeiSosGmbH&Co.KGdoesnotwarrantor representthatanylicense,eitherexpressedorimplied,isgrantedunderanypatentright,copyright,maskworkright,orother intellectualpropertyrightrelatingtoanycombination,application,orprocessinwhichWürthElektronikeiSosGmbH&Co.KG componentsorservicesareused. General Terms and Conditions Unless otherwise agreed in individual contracts, all orders are subject to the current version of the “General Terms and ConditionsofWürthElektronikeiSosGroup”,lastversionavailableatwww.we-online.com. DatasheetVersion1.2 ©October2022 www.we-online.com/powermodules 37