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PINASSIGNMENTS
1
2
3
4
12
11
10
9
5 6 7 8
131516
EN
RUN
ENVGL
ENVGH
FBL
FBM
AGND
VMAIN
PGND
激励
VGH
FBH
门
VIN
SWN
SWP
1
2
3
4
12
11
10
9
5 6
7
8
13141516
EN
RUN
AGND
AGND
FBL
FBM
AGND
VMAIN
PGND
激励
VGH
FBH
门
VIN
SWP
1
2
3
4
12
11
10
9
5 6
7
8
13141516
Exposed
热的 die*
EN
RUN
LDOIN
LDOOUT
FBL
FBM
AGND
VMAIN
PGND
激励
VGH
FBH
门
VIN
SWN
SWP
AGND
SWN
Exposed
热的 die*
AGND
14
Exposed
热的 die*
AGND
tps65120/1/2
(t运算 视图)
TPS65123
(t运算 视图)
TPS65124
(t运算 视图)
tps65120,tps65121,tps65123,tps65124
SLVS531–JUNE2004
TERMINALFUNCTIONS
终端
i/odescription
nameno.
vin15ithisistheinputvoltagepinofthedevice.
thispincaneitherbethegatedriveroutputtoanexternalsmallp-channelmosfet(seeapplication
gate16i/osection),oranactivehighcontrolinput.pullinggateabovethe1.4vlogic-highlevelandruntoalogic-低
leveldisablestheintegratedactivepower-downsequencing.
runcontrolstheexternalp-channelmosfet.thispinmustbeterminatedandnotbeleftfloating.forcing
RUN2I
thispintoalogic-highlevelturnsontheexternalmosfetswitch.
thisistheenablepinofthemultiple-outputdc-至-dcconverter.thispinmustbeterminatedandnotbeleft
en1ifloating.asimultaneouslogic-highlevelonenandrunenablestheconverterandalogic-lowshutsdown
thedevice.
swn14i/oconnecttheinductortothispin.thispinisconnectedtothesourceofthehigh-sidemosfetswitch.
swp13i/oconnecttheinductortothispin.thispinisconnectedtothedrainofthelow-sidemosfetswitch.
pgnd12opowerground.connecttoagndunderneaththeic.
VGH10OPositiveoutput
providesabootstrappedsupplyfortherectifiermosfetdriver,enablingthegateofthemosfettobe
BOOT11O
drivenabovetheoutputvoltage.
VMAIN8IMainoutput
fbh9ifeedbackpinforthepositiveoutputvoltagedivider.regulatesto1.213vnominal.
feedbackpinforthenegativeoutputvoltagedivider.regulatesto0vnominal.connectfeedbackresistor
FBL5I
dividerbetweenvglandmainoutput.
fbm6ifeedbackpinforthemainoutputvoltagedivider.regulatesto1.213vnominal.
analogground.connecttopowerground(pgnd)underneathic.pins3and4areonlyusedforagndin
agnd7,3,4
tps65123.
auxiliarylinearregulatorinput.ifthispinisconnectedtognd,thevoltageregulatorisdisabled
ldoin3i(tps65120/1/2).thelow-dropoutseries-passregulator(ldo)isenabledaccordingtothegatesignal
定时.
ldoout4oauxiliarylinearregulatoroutput(tps65120/1/2).
envgl3ienablepinfornegativeoutput(tps65124).thispinshouldbeterminatedandnotbeleftfloating.
envgh4ienablepinforpositiveoutput(tps65124).thispinshouldbeterminatedandnotbeleftfloating.
6
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