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SC635MLTRT 데이터시트(PDF) 9 Page - Semtech Corporation

부품명 SC635MLTRT
상세설명  Charge Pump Flash LED Driver
PDF  12 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC635MLTRT 데이터시트(HTML) 9 Page - Semtech Corporation

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 2005SemtechCorp.
www.semtech.com
POWER MANAGEMENT
SC635
SuggestedLayout
ThesensetracebetweenPin6andRisroutedaround
thegroundvias,allowingtheshortestgroundreturnpath
possible.ThesensetraceisconnectedtoRattheposi-
tiveterminalpadforthemostaccurateoutputpossible.
Thebottomcopperlayerismostlyagroundplanewithno
obstructionsbetweenthegroundvias.Thesmallerrect-
angletotheleftconnectstheinputpowertoVINpin1and
inputcapacitorC4.Thetwotracesatthelowerleftarefor
logicinputsFLASHandCTRL.Thetracetotherightisthe
ISETpin“sense”trace.Thesensetraceisroutedoutof
thepathofthereturninggroundcurrent.
LayoutGuidelines
Thefollowinglayoutissuggestedforatwo-layerdesign.
ThecapacitorsCandC2arethebucketcapacitorsand
eachconductsthefullloadcurrentofupto200mApulsed
foronehalfclockcycle.C3istheoutputdecouplingca-
pacitorplacedneartheSC635VOUTpin.C4isthein-
putdecouplingcapacitorplacedneartheSC635VINpin.
Multipleviasshouldbeusedwheneveritisnecessaryto
changelayersonnetsconnectingtopinsVIN,VOUT,GND,
C1-,C1+,C2-andC2+.ResistorR1isroutedwithavery
low resistance connection between R1 and GND pin 3.
BottomCopper
TopCopper



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