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DEVICEINFORMATION
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28
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26
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24
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AGND
VSENSE
竞赛
PWRGD
激励
PH
PH
PH
PH
PH
PH
PH
PH
PH
RT
同步
ss/ena
VBIAS
VIN
PVIN
PVIN
PVIN
PVIN
PGND
PGND
PGND
PGND
PGND
热的
垫子
TPS54010
SLVS509–MAY2004
PWPPACKAGE
(topview)
TERMINALFUNCTIONS
PINNAMEPINNUMBERDESCRIPTION
analogground.returnforcompensationnetwork/outputdivider,慢-startcapacitor,vbias
agnd1capacitor,andrtresistor.ifusingthepowerpad,connectittoagnd.seethe
应用
信息
sectionfordetails.
bootstrapoutput.0.022-µfto0.1-µflow-esrcapacitorconnectedfromboottophgenerates
BOOT5
floatingdriveforthehigh-sidefetdriver.
comp3erroramplifieroutput.connectfrequencycompensationnetworkfromcomptovsense
powerground.highcurrentreturnforthelow-sidedriverandpowermosfet.connectpgnd
pgnd15,16,17,18,19withlargecopperareastotheinputandoutputsupplyreturns,andnegativeterminalsoftheinput
andoutputcapacitors.asinglepointconnectiontoagndisrecommended.
phaseoutput.junctionoftheinternalhigh-sideandlow-sidepowermosfets,andoutput
ph6-14
inductor.
inputsupplyforthepowermosfetswitchesandinternalbiasregulator.bypassthepvinpins
pvin20,21,22,23
tothepgndpinsclosetodevicepackagewithahigh-质量,低-esr10-µfceramiccapacitor.
powergoodopendrainoutput.highwhenvsense.90%v
ref
,otherwisepwrgdislow.便条
PWRGD4
thatoutputislowwhenss/enaislowortheinternalshutdownsignalisactive.
frequencysettingresistorinput.connectaresistorfromrttoagndtosettheswitching
RT28
频率,f
s
.
慢-开始/enableinput/输出.dualfunctionpinwhichprovideslogicinputtoenable/使不能运转
ss/ena26
deviceoperationandcapacitorinputtoexternallysetthestart-uptime.
synchronizationinput.dualfunctionpinwhichprovideslogicinputtosynchronizetoanexternal
sync27oscillatororpinselectbetweentwointernallysetswitchingfrequencies.whenusedto
synchronizetoanexternalsignal,aresistormustbeconnectedtothertpin.
internalbiasregulatoroutput.suppliesregulatedvoltagetointernalcircuitry.bypassvbiaspinto
VBIAS25
agndpinwithahigh-质量,低-esr0.1-µfto1.0-µfceramiccapacitor.
inputsupplyfortheinternalcontrolcircuits.bypassthevinpintothepgndpinsclosetodevice
VIN24
packagewithahigh-质量,低-esr1-µfceramiccapacitor.
vsense2erroramplifierinvertinginput.connecttooutputvoltagecompensationnetwork/outputdivider.
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