V
INL1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1µH
C
2
C
3
2.7Vto
5.5V
V
OUT
3.3V/2A
TPS63020
PG
PowerGood
Output
C
1
2X10µF
0.1µF
3X22µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
HIGHEFFICIENCYSINGLEINDUCTORBUCK-BOOSTCONVERTERWITH4-ASWITCHES
CheckforSamples:TPS63020,TPS63021
FEATURES
•Upto96%Efficiency•SmartPowerGoodOutput
•3AOutputCurrentat3.3VinStepDownMode•LoadDisconnectDuringShutdown
(V
IN
=3.6Vto5.5V)
•OvertemperatureProtection
•Morethan2AOutputCurrentat3.3VinBoost
•OvervoltageProtection
Mode(V
IN
>2.5V)
•Availableina3×4-mm,QFN-14Package
•AutomaticTransitionBetweenStepDownand
BoostModeAPPLICATIONS
•DynamicInputCurrentLimit
•AllTwo-CellandThree-CellAlkaline,NiCdor
•DeviceQuiescentCurrentlessthan50μA
NiMHorSingle-CellLiBatteryPowered
Products
•InputVoltageRange:1.8Vto5.5V
•UltraMobilePC'sandMobileInternetDevices
•FixedandAdjustableOutputVoltageOptions
from1.2Vto5.5V
•DigitalMediaPlayers
•PowerSaveModeforImprovedEfficiencyat
•DSC'sandCamcorders
LowOutputPower
•CellularPhonesandSmartphones
•ForcedFixedFrequencyOperationat2.4MHz
•PersonalMedicalProducts
andSynchronizationPossible
•IndustrialMeteringEquipment
•HighPowerLED's
DESCRIPTION
TheTPS6302xdevicesprovideapowersupplysolutionforproductspoweredbyeitheratwo-cellorthree-cell
alkaline,NiCdorNiMHbattery,currentscangoashighas3A
whileusingasingle-cellLi-IonorLi-PolymerBattery,k-boost
converterisbadonafixedfrequency,pul-width-modulation(PWM)controllerusingsynchronousrectification
oadcurrents,theconverterentersPowerSavemodetomaintainhigh
erSaveModecanbedisabled,forcingtheconverterto
imumaveragecurrentintheswitchesislimitedtoatypicalvalue
putvoltageisprogrammableusinganexternalresistordivider,orisfixedinternallyonthechip.
shutdown,theloadisdisconnectedfromthe
iceispackagedina14-pinQFNPowerPAD™packagemeasuring3×4mm(DSJ).
Pleabeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduincriticalapplicationsofTexas
Instrumentsmiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
PowerPADisatrademarkofTexasInstruments.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2010–2011,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
tionprocessingdoesnot
necessarilyincludetestingofallparameters.
芯天下--/
TPS63020
TPS63021
SLVS916A–APRIL2010–
dsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
AVAILABLEDEVICEOPTIONS(1)
OUTPUTVOLTAGE
T
A
PACKAGEMARKINGPACKAGEPARTNUMBER(2)
DC/DC
AdjustablePS63020TPS63020DSJ
–40°Cto85°C14-PinQFN
3.3VPS63021TPS63021DSJ
(1)Contactthefactorytocheckavailabilityofotherfixedoutputvoltageversions.
(2)FordetailedorderinginformationpleacheckthePACKAGEOPTIONADDENDUMctionattheendofthisdatasheet.
ABSOLUTEMAXIMUMRATINGS
overoperatingfree-airtemperaturerange(unlessotherwinoted)(1)
MINMAXUNIT
Voltagerange(2)VIN,VINA,L1,L2,VOUT,PS/SYNC,EN,FB,PG–0.37V
Operatingjunction,T
J
–40150°C
Temperaturerange
Storage,T
stg
–65150°C
HumanBodyModel-(HBM)3kV
ESDrating(3)MachineModel-(MM)200V
ChargeDeviceModel-(CDM)1.5kV
(1)Stressbeyondtholistrestressratings
only,andfunctionaloperationofthedeviceattheoranyotherconditionsbeyondthoindicatedunderrecommendedoperating
retoabsolute-maximum-ratedconditionsforextendedperiodsmyaffectdevicereliability.
(2)Allvoltagesarewithrespecttonetworkgroundterminal.
(3)ESDtestingisperformedaccordingtotherespectiveJESD22JEDECstandard.
THERMALINFORMATION
TPS63020,
TPS63021
THERMALMETRIC(1)UNITS
DSJ
14PINS
θ
JA
Junction-to-ambientthermalresistance41.8
θ
JC(TOP)
Junction-to-ca(top)thermalresistance47
θ
JB
Junction-to-boardthermalresistance17
°C/W
ψ
JT
Junction-to-topcharacterizationparameter0.9
ψ
JB
Junction-to-boardcharacterizationparameter16.8
θ
JC(BOTTOM)
Junction-to-ca(bottom)thermalresistance3.6
(1)Formoreinformationabouttraditionalandnewthermalmetrics,etheICPackageThermalMetricsapplicationreport,SPRA953.
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TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
RECOMMENDEDOPERATINGCONDITIONS
MINNOMMAXUNIT
SupplyvoltageatVIN,VINA1.85.5V
Operatingfreeairtemperaturerange,T
A
–4085°C
Operatingjunctiontemperaturerange,T
J
–40125°C
ELECTRICALCHARACTERISTICS
overrecommendedfree-airtemperaturerangeandoverrecommendedinputvoltagerange(typicalatanambienttemperature
rangeof25°C)(unlessotherwinoted)
DC/DCSTAGE
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
Inputvoltagerange1.85.5V
V
IN
Minimuminputvoltageforstartup0°C≤T
A
≤85°C1.51.81.9V
Minimuminputvoltageforstartup1.51.82.0V
V
OUT
TPS63020outputvoltagerange1.25.5V
Minimumdutycycleinstepdownconversion30%40%
V
FB
TPS63020feedbackvoltage495500505mV
PS/SYNC=VIN
TPS63021outputvoltage3.2673.33.333V
V
FB
TPS63020feedbackvoltagePS/SYNC=GNDreferencedto500mV0.6%5%
TPS63021outputvoltageregulationPS/SYNC=GNDreferencedto3.3V0.6%5%
Maximumlineregulation0.5%
Maximumloadregulation0.5%
fOscillatorfrequency22kHz
Frequencyrangeforsynchronization22kHz
I
SW
AverageswitchcurrentlimitV
IN
=V
INA
=3.6V,T
A
=25°C35mA
HighsideswitchonresistanceV
IN
=V
INA
=3.6V50mΩ
LowsideswitchonresistanceV
IN
=V
INA
=3.6V50mΩ
VINandVINA2550μA
QuiescentI
O
=0mA,V
EN
=V
IN
=V
INA
=3.6V,
I
qcurrentV
OUT
=3.3V
VOUT510μA
TPS63021FBinputimpedanceV
EN
=HIGH1MΩ
I
S
ShutdowncurrentV
EN
=0V,V
IN
=V
INA
=3.6V0.11μA
CONTROLSTAGE
UndervoltagelockoutthresholdV
INA
voltagedecreasing1.41.51.6V
UVLO
Undervoltagelockouthysteresis200mV
V
IL
EN,PS/SYNCinputlowvoltage0.4V
V
IH
EN,PS/SYNCinputhighvoltage1.2V
EN,PS/SYNCinputcurrentClampedtoGNDorVINA0.010.1μA
PGoutputlowvoltageV
OUT
=3.3V,I
PGL
=10μA0.040.4V
PGoutputleakagecurrent0.010.1μA
Outputovervoltageprotection5.57V
Overtemperatureprotection140°C
Overtemperaturehysteresis20°C
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VOUT
L1
EN
GND
L2
PS/SYNC
VINA
FB
P
o
w
e
r
P
a
d
L2
P
G
N
D
VIN
L1
PG
VIN
VOUT
P
G
N
D
P
G
N
D
P
G
N
D
P
G
N
D
P
G
N
D
P
G
N
D
P
G
N
D
TPS63020
TPS63021
SLVS916A–APRIL2010–
PINASSIGNMENTS
DSJPACKAGE
(TOPVIEW)
PinFunctions
PIN
I/ODESCRIPTION
NAMENO.
EN12IEnableinput(1enabled,0disabled),mustnotbeleftopen
FB3IVoltagefeedbackofadjustableversions,mustbeconnectedtoVOUTonfixedoutputvoltage
versions
GND2Control/logicground
L18,9IConnectionforInductor
L26,7IConnectionforInductor
PS/SYNC13IEnable/disablepowersavemode(1disabled,0enabled,clocksignalforsynchronization),must
notbeleftopen
PG14OOutputpowergood(1good,0failure;opendrain)
PGNDPowerPAD™Powerground
VIN10,11ISupplyvoltageforpowerstage
VOUT4,5OBuck-boostconverteroutput
VINA1ISupplyvoltageforcontrolstage
PowerPAD™solderedtoachieveappropriatepowerdissipation.
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_
+
PGNDPGND
VIN
VOUT
+
-
VREF
PGND
PGND
FB
VOUT
L2L1
VIN
VINA
PS/SYNC
EN
GND
VINA
Current
Sensor
Gate
Control
Modulator
Oscillator
Device
Control
PG
Temperature
Control
_
+
_
+
PGNDPGND
VIN
VOUT
+
-
VREF
PGND
PGND
FB
VOUT
L2L1
VIN
VINA
PS/SYNC
EN
GND
VINA
Current
Sensor
Gate
Control
Modulator
Oscillator
Device
Control
PG
Temperature
Control
_
+
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
FUNCTIONALBLOCKDIAGRAM(TPS63020)
FUNCTIONALBLOCKDIAGRAM(TPS63021)
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TPS63020
TPS63021
SLVS916A–APRIL2010–
TYPICALCHARACTERISTICS
TABLEOFGRAPHS
DESCRIPTIONFIGURE
vsInputvoltage(TPS63020,V
OUT
=2.5V/V
OUT
=4.5V)1
Maximumoutputcurrent
vsInputvoltage(TPS63021,V
OUT
=3.3V)2
vsOutputcurrent(TPS63020,PowerSaveEnabled,V
OUT
=2.5V/V
OUT
=4.5V)3
vsOutputcurrent(TPS63020,PowerSaveDisabled,V
OUT
=2.5V/V
OUT
=4.5V)4
vsOutputcurrent(TPS63021,PowerSaveEnabled,V
OUT
=3.3V)5
vsOutputcurrent(TPS63021,PowerSaveDisabled,V
OUT
=3.3V)6
vsInputvoltage(TPS63020,PowerSaveEnabled,V
OUT
=2.5V,I
OUT
={10;500;1000;
7
2000mA})
vsInputvoltage(TPS63020,PowerSaveEnabled,V
OUT
=4.5V,I
OUT
={10;500;1000;
8
2000mA})
Efficiency
vsInputvoltage(TPS63020,PowerSaveDisabled,V
OUT
=2.5V,I
OUT
={10;500;
9
1000;2000mA})
vsInputvoltage(TPS63020,PowerSaveDisabled,V
OUT
=4.5V,I
OUT
={10;500;
10
1000;2000mA})
vsInputvoltage(TPS63021,PowerSaveEnabled,V
OUT
=3.3V,I
OUT
={10;500;1000;
11
2000mA})
vsInputvoltage(TPS63021,PowerSaveDisabled,V
OUT
=3.3V,I
OUT
={10;500;
12
1000;2000mA})
vsOutputcurrent(TPS63020,V
OUT
=2.5V)13
OutputvoltagevsOutputcurrent(TPS63020,V
OUT
=4.5V)14
vsOutputcurrent(TPS63021,V
OUT
=3.3V)15
Loadtransientrespon(TPS63021,VI
N
OUT
,Loadchangefrom500mAto1500
16
mA)
Loadtransientrespon(TPS63021,V
IN
>V
OUT
,Loadchangefrom500mAto1500
17
mA)
Waveforms
Linetransientrespon(TPS63021,V
OUT
=3.3V,I
OUT
=1500mA)18
Startupafterenable(TPS63021,V
OUT
=3.3V,V
IN
=2.4V,I
OUT
=1500mA)19
Startupafterenable(TPS63021,V
OUT
=3.3V,V
IN
=4.2V,I
OUT
=1500mA)20
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InputVoltage(V)
M
a
xi
m
u
m
O
ut
p
ut
C
u
r
r
e
nt
(
A)
1.82.22.633.43.84.24.655.4
0
0.5
1
1.5
2
2.5
3
3.5
4
TPS63020
V
OUT
=2.5V
V
OUT
=4.5V
InputVoltage(V)
M
a
xi
m
u
m
O
ut
p
ut
C
u
r
r
e
nt
(
A)
1.82.22.633.43.84.24.655.4
0
0.5
1
1.5
2
2.5
3
3.5
4
TPS63021
V
OUT
=3.3V
OutputCurrent(A)
Ef
f
i
ci
e
n
c
y
(
%)
0
10
20
30
40
50
60
70
80
90
100
100µ1m10m100m14
TPS63020,PowerSaveEnabled
V
IN
=1.8V,V
OUT
=2.5V
V
IN
=3.6V,V
OUT
=2.5V
V
IN
=2.4V,V
OUT
=4.5V
V
IN
=3.6V,V
OUT
=4.5V
OutputCurrent(A)
Ef
f
i
ci
e
n
c
y
(
%)
0
10
20
30
40
50
60
70
80
90
100
100µ1m10m100m14
TPS63020,PowerSaveDisabled
V
IN
=1.8V,V
OUT
=2.5V
V
IN
=3.6V,V
OUT
=2.5V
V
IN
=2.4V,V
OUT
=4.5V
V
IN
=3.6V,V
OUT
=4.5V
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
MAXIMUMOUTPUTCURRENTMAXIMUMOUTPUTCURRENT
vsvs
INPUTVOLTAGEINPUTVOLTAGE
2.
EFFICIENCYEFFICIENCY
vsvs
OUTPUTCURRENTOUTPUTCURRENT
4.
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OutputCurrent(A)
Ef
f
i
ci
e
n
c
y
(
%)
0
10
20
30
40
50
60
70
80
90
100
100µ1m10m100m14
TPS63021,PowerSaveEnabled
V
IN
=2.4V
V
IN
=3.6V
OutputCurrent(A)
Ef
f
i
ci
e
n
c
y
(
%)
0
10
20
30
40
50
60
70
80
90
100
100µ1m10m100m14
TPS63021,PowerSaveDisabled
V
IN
=2.4V
V
IN
=3.6V
InputVoltage(V)
Ef
f
i
ci
e
n
c
y
(
%)
1.82.22.633.43.84.24.655.4
0
10
20
30
40
50
60
70
80
90
100
TPS63020,V
OUT
=2.5V,PowerSaveEnabled
I
OUT
=10mA
I
OUT
=500mA
I
OUT
=1A
I
OUT
=2A
InputVoltage(V)
Ef
f
i
ci
e
n
c
y
(
%)
1.82.22.633.43.84.24.655.4
0
10
20
30
40
50
60
70
80
90
100
TPS63020,V
OUT
=4.5V,PowerSaveEnabled
I
OUT
=10mA
I
OUT
=500mA
I
OUT
=1A
I
OUT
=2A
TPS63020
TPS63021
SLVS916A–APRIL2010–
EFFICIENCYEFFICIENCY
vsvs
OUTPUTCURRENTOUTPUTCURRENT
6.
EFFICIENCYEFFICIENCY
vsvs
INPUTVOLTAGEINPUTVOLTAGE
8.
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InputVoltage(V)
Ef
f
i
ci
e
n
c
y
(
%)
1.82.22.633.43.84.24.655.4
0
10
20
30
40
50
60
70
80
90
100
TPS63020,V
OUT
=2.5V,PowerSaveDisabled
I
OUT
=10mA
I
OUT
=500mA
I
OUT
=1A
I
OUT
=2A
InputVoltage(V)
Ef
f
i
ci
e
n
c
y
(
%)
1.82.22.633.43.84.24.655.4
0
10
20
30
40
50
60
70
80
90
100
TPS63020,V
OUT
=4.5V,PowerSaveDisabled
I
OUT
=10mA
I
OUT
=500mA
I
OUT
=1A
I
OUT
=2A
InputVoltage(V)
Ef
f
i
ci
e
n
c
y
(
%)
1.82.22.633.43.84.24.655.4
0
10
20
30
40
50
60
70
80
90
100
TPS63021,PowerSaveEnabled
I
OUT
=10mA
I
OUT
=500mA
I
OUT
=1A
I
OUT
=2A
InputVoltage(V)
Ef
f
i
ci
e
n
c
y
(
%)
1.82.22.633.43.84.24.655.4
0
10
20
30
40
50
60
70
80
90
100
TPS63021,PowerSaveDisabled
I
OUT
=10mA
I
OUT
=500mA
I
OUT
=1A
I
OUT
=2A
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
EFFICIENCYEFFICIENCY
vsvs
INPUTVOLTAGEINPUTVOLTAGE
10.
EFFICIENCYEFFICIENCY
vsvs
INPUTVOLTAGEINPUTVOLTAGE
12.
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OutputCurrent(A)
O
ut
p
ut
V
ol
t
a
g
e
(
V)
2.4
2.45
2.5
2.55
2.6
100µ1m10m100m15
TPS63020,PowerSaveDisabled
V
IN
=3.6V
OutputCurrent(A)
O
ut
p
ut
V
ol
t
a
g
e
(
V)
4.4
4.45
4.5
4.55
4.6
100µ1m10m100m15
TPS63020,PowerSaveDisabled
V
IN
=3.6V
V=2.4V,I=500mAto1500mA
INOUT
Time2ms/div
TPS63021
OutputVoltage
50mV/div,AC
OutputCurrent
500mA/div,DC
OutputCurrent(A)
O
ut
p
ut
V
ol
t
a
g
e
(
V)
3.2
3.25
3.3
3.35
3.4
100µ1m10m100m15
TPS63021,PowerSaveDisabled
V
IN
=3.6V
TPS63020
TPS63021
SLVS916A–APRIL2010–
OUTPUTVOLTAGEOUTPUTVOLTAGE
vsvs
OUTPUTCURRENTOUTPUTCURRENT
14.
OUTPUTVOLTAGE
vs
OUTPUTCURRENTLOADTRANSIENTRESPONSE
16.
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V=4.2V,I=500mAto1500mA
INOUT
Time2ms/div
TPS63021
OutputVoltage
50mV/div,AC
OutputCurrent
500mA/div,DC
V=3.0Vto3.7V,I=1500mA
INOUT
Time2ms/div
TPS63021
OutputVoltage
50mV/div,AC
InputVoltage
500mV/div,AC
V=2.4V,R=2.2
INL
W
Time100s/divm
TPS63021
Enable
2V/div,DC
OutputVoltage
1V/div,DC
InductorCurrent
1A/div,DC
VoltageatL1
5V/div,DC
V=4.2V,R=2.2
INL
W
Time40s/divm
TPS63021
Enable
2V/div,DC
OutputVoltage
1V/div,DC
InductorCurrent
500mA/div,DC
VoltageatL2
5V/div,DC
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
LOADTRANSIENTRESPONSELINETRANSIENTRESPONSE
18.
STARTUPAFTERENABLESTARTUPAFTERENABLE
20.
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V
INL1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1.5µH
C
2
C
3
2.5Vto
5.5V
V
OUT
3.3V/500mA
TPS63020
PG
PowerGood
Output
C
1
2X10µF
0.1µF
3X10µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
TPS63020
TPS63021
SLVS916A–APRIL2010–
PARAMETERMEASUREMENTINFORMATION
Components
REFERENCEDESCRIPTIONMANUFACTURER
TPS63020orTPS63021TexasInstruments
L11.5μH,4mmx4mmx2mmXFL4020-152ML,Coilcraft
C12×10μF6.3V,0603,X5RceramicGRM188R60J106ME84D,Murata
C23×22μF6.3V,0603,X5RceramicGRM188R60J106ME84D,Murata
C30.1μF,X5RorX7Rceramic
R1DependingontheoutputvoltageatTPS63020,0ΩatTPS63021
R2DependingontheoutputvoltageatTPS63020,notudatTPS63021
R31MΩ
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TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
DETAILEDDESCRIPTION
Thecotrolleralsousinput
sofinputandoutputvoltagearemonitoredandimmediatelycanchange
tageerroramplifiergetsits
stableoutputvoltages,aresistivevoltagedividermustbeconnectedto
doutputvoltages,
dbackvoltagewillbecomparedwiththe
internalreferencevoltagetogenerateastableandaccurateoutputvoltage.
Thedeviceus4internalN-channelMOSFETstomaintainsynchronouspowerconversionatallpossible
ablesthedevicetokeephighefficiencyoverawideinputvoltageandoutputpower
dgroundshiftproblemsduetothehighcurrentsintheswitches,twoparategroundpinsGND
erswitchesareconnectedto
oundsmustbeconnectedonthePCBatonlyonepoint,ideally,he
4-switchtopology,thelect
thedevicefromoverheatinganinternaltemperaturensorisimplemented.
Buck-BoostOperation
Toregulatetheoutputvoltageatallpossibleinputvoltageconditions,thedeviceautomaticallyswitchesfrom
ysusoneactiveswitch,onerectifying
switch,oneswitchpermanentlyon,ore,itoperatesasastepdown
converter(buck)whentheinputvoltageishigherthantheoutputvoltage,andasaboostconverterwhenthe
snomodeofoperationinwhichall4switchesare
llingtheswitchesthiswayallowstheconvertertomaintainhighefficiencyatthe
mostimportantpointofoperation,currentthroughthe
switchesandtheinductoriskeptataminimum,tominimizeswitchingandconductionloss.
Controlloopdescription
Theaverageinductorcurrentisregulatedbyafastcurrentregulatorloopwhichiscontrolledbyavoltagecontrol
21showsthecontrolloop.
Thenon-invertinputof
rentthroughresistorRS,whichreprentstheactualinductor
current,iscomparedtothedesiredvalueandthedifference,orcurrenterror,isamplifiedandcomparedtothe
sawtoothrampofeithertheBuckortheBoost.
TheBuck-BoostOverlapControlTMspecifiesthattheclassicalbuck-boostfunction,whichwouldcautwo
switchestobeoneveryhalfacycle,eofthisblock,wheneverallswitchesbecomesactive
duringoneclockcycle,r,whenthereisnoswitching
activitiesbecauthereisagapbetweentheramps,ult,the
numberofclassicalbuck-boostcyclesornoswitchingisreducedtoaminimumandhighefficiencyvaluesis
achieved.
Slopecompensationisnotrequiredtoavoidsubharmonicoscillationwhichareotherwiobrvedwhenworking
withpeakcurrentmodecontrolwithD>0.5.
TheamplifiedinductorcurrentdownslopeatoneinputofthePWMcomparatormustnotexceedtheoscillator
rpoisreachedlimitingthegainofthecurrentamplifier.
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TM
TPS63020
TPS63021
SLVS916A–APRIL2010–
eCurrentModeControl
Power-savemodeandsynchronization
ThePS/aveModeisudtoimprove
lePowerSaveMode,PS//SYNCistlowthen
PowerSaveMopointthe
converteroperateswithreducedswitchingfrequencyandwithaminimumquiescentcurrenttomaintainhigh
efficiency.
DuringthePowerSaveMode,theoutputvoltageismonitoredwithacomparatorbythethresholdcomplowand
edeviceentersPowerSaveMode,theconverterstopsoperatingandtheoutputvoltage
peoutput
voltagefallsbelowthecomplowthresholdtto2.5%typicalaboveVout,thedevicerampsuptheoutput
voltageagain,bystartingoperationusingaprogrammedaverageinductorcurrenthigherthanrequiredbythe
vertercontinuesthepulsuntil
thecomphighthreshold,ttotypically3.5%aboveVoutnominal,isreachedandtheaverageinductorcurrent
eloadincreasabovetheminimumforcedinductorcurrentofabout
100mA,thedevicewillautomaticallyswitchtoPWMmode.
ThePowerSaveModecanbedisabledbyprogrammingthePS/tingaclocksignalat
PS/SYNCforcesthedevicetosynchronizetotheconnectedclockfrequency.
SynchronizationisdonebyaPLL,sosynchronizingtolowerandhigherfrequenciescomparedtotheinternal
can/SYNCinput
supportsstandardlogicthresholds.
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HeavyLoadtransientstep
Vo
PFMmodeatlightload
current
PWMmode
ComparatorHigh
Comparatorlow
AbsoluteVoltagedrop
withpositioning
3.5%
3%
2.5%
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
-SaveModeThresholdsandDynamicVoltagePositioning
Dynamicvoltagepositioning
AsdetailedinFigure22,theoutputvoltageistypically3%abovethenominaloutputvoltageatlightload
currents,vesadditionalheadroomforthevoltagedropduringaload
lowstheconvertertooperatewithasmalloutputcapacitorandstill
ure22fordetailedoperationof
thepowersavemode
DynamicCurrentLimit
Toprotectthedeviceandtheapplication,nal
operatingconditions,rentlimitvaluecanbefoundintheelectrical
upplyvoltageatVINdropsbelow2.3V,nhappen
singoutputimpedance,whenthebatteriesarealmost
discharged,oranadditionalh
dynamiccurrentlimithasit
thisvoltage,thedeviceisforcedintoburstmodeoperationtryingtostayactiveaslongaspossibleevenwitha
weakinputpowersource.
Ifthedietemperatureincreasabovetherecommendedmaximumjunctiontemperature,thedynamiccurrent
rtothebehaviorwhentheinputvoltageatVINdrops,thecurrentlimitisreducedwith
temperatureincreasing.
DeviceEnable
shutdownmode,theregulatorstopsswitching,allinternalcontrolcircuitryisswitchedoff,andtheloadis
ansthattheoutputvoltagecandropbelowtheinputvoltageduring
start-upoftheconverter,thedutycycleandthepeakcurrentarelimitedinordertoavoidhigh
peakcurrentsflowingfromtheinput.
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TPS63020
TPS63021
SLVS916A–APRIL2010–
PowerGood
Thedevicehasabuiltinpowerg
soonastheaverageinductorcurrentislimitedtoavaluebelowthecurrent,thevoltageregulatordemandsfor
putisopendrain,soitslogic
functioncanbeadjustedtoanyvoltageleveltheconnectedlogicisusing,byconnectingapullupresistortothe
toringthestatusofthecurrentcontrolloop,thepowergoodoutputprovides
theearliestindicationpossibleforanoutputvoltagebreakdownandleavestheconnectedapplicationa
maximumtimetosafelyreact.
SoftstartandShortCircuitProtection
Afterbeingenabled,ragecurrentlimitrampsupfromaninitial400mA
tputvoltageofabout1.2V,thecurrentlimitisatitsnominal
utputvoltagedoesnotincrea,snotimerimplemented.
Thus,theoutputvoltageovershootatstartup,aswellastheinrushcurrent,ice
rampsuptheoutputvoltag
theoutputvoltagedoesnotincreaabove1.2V,thedeviceassumesashortcircuitattheoutput,andkeepsthe
rtontheoutputduringoperation,thecurrentlimit
alsoisdecreadaccordingly.
OvervoltageProtection
If,foranyreason,theoutputvoltageisnotfedbackproperlytotheinputofthevoltageamplifier,controlofthe
ore,overvoltageprotectionisimplementedtoavoidtheoutput
voltageexceedinlemented
overvachestheovervoltage
threshold,thevoltageamplifierregulatestheoutputvoltagetothisvalue.
UndervoltageLockout
Anundervoltagelockoutfunctionpreventsdevicestart-upifthesupplyvoltageonVINAislowerthan
approximatelyitsthreshold(etheElectricalCharacteristicstable).Wheninoperation,thedeviceautomatically
enterstheshutdownice
automaticallyrestartsiftheinputvoltagerecoverstotheminimumoperatinginputvoltage.
OvertemperatureProtection
Thedevicehamperature
exceedstheprogrammedthreshold(etheElectricalCharacteristicstable)
astheICtemperaturehasdecreadbelowtheprogrammedthreshold,sa
built-inhysteresistoavoidunstableoperationatICtemperaturesattheovertemperaturethreshold.
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VoutVin
D=
Vout
-
DutyCycleBoost
PEAK
IoutVinD
I=+
η(1D)2L
´
´-´´f
RHPZ
2(1D)Vout
=
2IoutL
-´
´´
f
p
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
APPLICATIONINFORMATION
DESIGNPROCEDURE
Thore,theexternalL-Cfilter
e,theproductL×Cshouldnotmoveovera
r,whenlectingtheoutputfilteralowlimitforthe
inductorvalueexiststoavoidsubharmonicoscillationwhichcouldbecaudbyafartoofastrampupofthe
TPS6302Xries,theminimuminductorvalueshouldbekeptat1µH.
Selectingalargeroutputcapacitorvalueislesscriticalbecauthecornerfrequencymovestolowerfrequencies
lifythisprocess,Table2outlinespossibleinductorandcapacitorvalue
combinations.
InductorSelection
Forhighefficiencies,allyat
high-ingsmallchipinductors,
edstobeconsideredwhenlecting
gertheinductorvalue,
thesmallertheinly,larger
dsaturationoftheinductor,withthechon
inductancevalue,thon1and
Equation2showhowtocalculatethepeakcurrentI
PEAK
.Onlytheequationwhichdefinestheswitchcurrentin
boostmodeisreportedbecauthisisprovidingthehighestvalueofcurrentandreprentsthecriticalcurrent
valueforlectingtherightinductor.
(1)
(2)
With,
D=DutyCycleinBoostmode
f=Converterswitchingfrequency(typical2.4MHz)
L=Selectedinductorvalue
η=Estimatedconverterefficiency(uthenumberfromtheefficiencycurvesor0.80asanassumption)
Note:Thecalculationmustbedonefortheminimuminputvoltagewhichispossibletohaveinboostmode
Considerationmustbegiventotheloadtransientsanderrorconditionsthatcancauhigherinductorcurrents.
Thile2fortypicalinductors.
iculartheboosttransferfunction
exhibitsarighthalf-planezero,whofrequencyisinverproportionaltotheinductorvalueandtheload
anshigheristhevalueofinductanceandloadcurrentmorepossibilitieshastherightplanezero
commended
tochootheinductor'svalueinordertohavethefrequencyoftherighthalfplanezero>quency
oftheRHPZcanbecalculatedusingEquation3.
(3)
With,
D=DutyCycleinBoostmode
Note:Thecalculationmustbedonefortheminimuminputvoltagewhichispossibletohaveinboostmode.
Copyright©2010–2011,TexasInstrumentsIncorporatedSubmitDocumentationFeedback17
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OUT
FB
V
R1=R2×-1
V
æö
ç÷
èø
TPS63020
TPS63021
SLVS916A–APRIL2010–
orSelection
VENDORINDUCTORSERIES
CoilcraftXFL4020
TokoFDV0530S
Capacitorlection
InputCapacitor
Atleasta10μFinputcapacitorisrecommendedtoimprovetransientbehavioroftheregulatorandEMIbehavior
iccapacitorplacedascloaspossibletotheVINandPGNDpinsof
theICisrecommended.
OutputCapacitor
Fortheoutputcapacitor,uofasmallceramiccapacitorsplacedascloaspossibletotheVOUTandPGND
,foranyreason,theapplicationrequirestheuoflargecapacitorswhichcan
notbeplacedclototheIC,ll
capaommended
typicaloutputcapacitorvalueis30µFwithavariancethatdependsonthespecificapplicationrequirements.
capacitorswillcauloweroutputvoltage
rippleaswellasloweroutputvoltagedropduringloadtransients.
Whenchoosinginputandoutputcapacitors,itneedstobekeptinmind,thatthevalueofcapacitance
experiencessignificantlossfromtheirratedvaluedependingontheoperatingtemperatureandtheoperating
tuncommonforasmallsurfacemountceramiccapacitortolo50%andmoreofit'srated
sreason,itisimportanttoualargervalueofcapacitanceoracapacitorwithhigher
voltageratinginordertoensuretherequiredcapacitanceatthefulloperatingvoltage.
BypassCapacitor
Tomakesurethattheinternalcontrolcircuitsaresuppliedwithastablelownoisupplyvoltage,acapacitoris
ceramiccapacitorwithavalueof0.1μue
ofthiscapacitorshouldnotbehigherthan0.22μF.
SettingtheOutputVoltage
WhentheadjustableoutputvoltageversionTPS63020isud,theoutputvoltageistbytheexternalresistor
istordividermustbeconnectedbetweenVOUT,eoutputvoltageis
regulated,imumrecommendedvalueforthe
rentthroughtheresistivedividershouldbeabout100timesgreaterthanthecurrent
icalcurrentintotheFBpinis0.01μA,andthevoltageacrosstheresistorbetweenFBand
GND,R
2
,nthetwovalues,therecommendedvalueforR2shouldbelowerthan
500kΩ,inordertotthedividercurrentat3μcommendedtokeepthevalueforthisresistorin
therangeof200kΩ.Fromthat,thevalueoftheresistorconnectedbetweenVOUTandFB,R1,dependingonthe
neededoutputvoltage(V
OUT
),canbecalculatedusingEquation4:
(4)
AsmallcapacitorC2=10pF,inparallelwithR2needstobeplacedwhenusingthePowersavemodeandthe
adjustableversion,toprovidefilteringandimprovetheconsiderablytheefficiency.
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E
N
P
S/
S
Y
N
C
P
G
L1
U1
VIN
GND
VOUT
GND
C1
C2
R1
R2
C3GND
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
LAYOUTCONSIDERATIONS
Forallswitchingpowersupplies,thelayoutisanimportantstepinthedesign,especiallyathighpeakcurrents
ayoutisnotcarefullydone,theregulatorcouldshowstabilityproblemsas
ore,uwideandshorttracesforthemaincurrentpathandforthepowerground
utcapacitor,outputcapacitor,andtheinductorshouldbeplacedascloaspossibletotheIC.
Uacommongroundnodeforpowergroundandadifferentoneforcontrolgroundtominimizetheeffectsof
tthegroundnodesatanyplaceclotooneofthegroundpinsoftheIC.
Thefeedbackdivutthe
controlground,shorttracesarerecommendedaswell,oids
groundshiftproblems,whichcanoccurduetosuperimpositionofpowergroundcurrentandcontrolground
current.
outSuggestion
THERMALINFORMATION
Implementationofintegratedcircuitsinlow-profileandfine-pitchsurface-mountpackagestypicallyrequires
stem-dependentissuessuchasthermalcoupling,airflow,added
heatsinksandconvectionsurfaces,andtheprenceofotherheat-generatingcomponentsaffectthe
power-dissipationlimitsofagivencomponent.
Threebasicapproachesforenhancingthermalperformancearelistedbelow:
•ImprovingthepowerdissipationcapabilityofthePCBdesign
•ImprovingthethermalcouplingofthecomponenttothePCBbysolderingthePowerPAD™
•Introducingairflowinthesystem
Formoredetailsonhowtouthethermalparameters,etheapplicationnotes:ThermalCharacteristics
ApplicationNote(SZZA017),andICPackageThermalMetricsApplicationNote(SPRA953).
Copyright©2010–2011,TexasInstrumentsIncorporatedSubmitDocumentationFeedback19
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V
INL1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1.5µH
C
2
C
3
2.5Vto
5.5V
V
OUT
3.3V/500mA
TPS63020
PG
PowerGood
Output
C
1
2X10µF
0.1µF
3X10µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
V
INL1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1µH
C
2
C
3
2.5Vto
5.5V
V
OUT
3.3V/1.5A
TPS63020
PG
PowerGood
Output
C
1
2X10µF
0.1µF
2X22µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
V
INL1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1µH
C
2
C
3
2.7Vto
5.5V
V
OUT
3.3V/2A
TPS63020
PG
PowerGood
Output
C
1
2X10µF
0.1µF
3X22µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
TPS63020
TPS63021
SLVS916A–APRIL2010–
TYPICALAPPLICATION
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V
INL1
VIN
VINA
EN
PS/SYNC
GND
L2
VOUT
FB
PGND
L
1
1µH
C
2
C
3
2.7Vto
5.5V
V
OUT
3.3V/2A
TPS63020
PG
PowerGood
Output
C
1
2X10µF
0.1µF
3X22µF
1MΩ
180kΩ
R
1
R
2
1MΩ
R
3
R
2
C
4
4.7pF
68kΩ
R
4
TPS63020
TPS63021
S916A–APRIL2010–REVISEDDECEMBER2011
CapacitorC4andresistorR4areaddedforimprovedloadtransientperformance.
Copyright©2010–2011,TexasInstrumentsIncorporatedSubmitDocumentationFeedback21
ProductFolderLink(s):TPS63020TPS63021
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PACKAGEOPTIONADDENDUM
26-Feb-2011
Addendum-Page1
PACKAGINGINFORMATION
OrderableDevice
Status
(1)PackageTypePackage
Drawing
PinsPackageQty
EcoPlan
(2)Lead/
BallFinish
MSLPeakTemp
(3)Samples
(RequiresLogin)
TPS63020DSJRACTIVEVSONDSJ143000Green(RoHS
&noSb/Br)
CUNIPDAULevel-1-260C-UNLIM
TPS63020DSJTACTIVEVSONDSJ14250Green(RoHS
&noSb/Br)
CUNIPDAULevel-1-260C-UNLIM
TPS63021DSJRACTIVEVSONDSJ143000Green(RoHS
&noSb/Br)
CUNIPDAULevel-1-260C-UNLIM
TPS63021DSJTACTIVEVSONDSJ14250Green(RoHS
&noSb/Br)
CUNIPDAULevel-1-260C-UNLIM
(1)
Themarketingstatusvaluesaredefinedasfollows:
ACTIVE:Productdevicerecommendedfornewdesigns.
LIFEBUY:TIhasannouncedthatthedevicewillbediscontinued,andalifetime-buyperiodisineffect.
NRND:isinproductiontosupportexistingcustomers,butTIdoesnotrecommendusingthispartinanewdesign.
PREVIEW:smayormaynotbeavailable.
OBSOLETE:TIhasdiscontinuedtheproductionofthedevice.
(2)
EcoPlan-Theplannedeco-friendlyclassification:Pb-Free(RoHS),Pb-Free(RoHSExempt),orGreen(RoHS&noSb/Br)-pleacheck/productcontentforthelatestavailability
informationandadditionalproductcontentdetails.
TBD:ThePb-Free/Greenconversionplanhasnotbeendefined.
Pb-Free(RoHS):TI'sterms"Lead-Free"or"Pb-Free"meanmiconductorproductsthatarecompatiblewiththecurrentRoHSrequirementsforall6substances,includingtherequirementthat
leadnotexceed0.1%esignedtobesolderedathightemperatures,TIPb-Freeproductsaresuitableforuinspecifiedlead-freeprocess.
Pb-Free(RoHSExempt):ThiscomponenthasaRoHSexemptionforeither1)lead-badflip-chipsolderbumpsudbetweenthedieandpackage,or2)lead-baddieadhesiveudbetween
ponentisotherwiconsideredPb-Free(RoHScompatible)asdefinedabove.
Green(RoHS&noSb/Br):TIdefines"Green"tomeanPb-Free(RoHScompatible),andfreeofBromine(Br)andAntimony(Sb)badflameretardants(BrorSbdonotexceed0.1%byweight
inhomogeneousmaterial)
(3)
MSL,PeakTemp.--TheMoistureSensitivityLevelratingaccordingtotheJEDECindustrystandardclassifications,andpeaksoldertemperature.
ImportantInformationandDisclaimer:TheinformationprovidedonthispagereprentsTI'sitsknowledgeandbeliefoninformation
providedbythirdparties,andakenand
continuestotakereasonablestepstoprovidereprentativeandaccurateinformationbutmaynothaveconducteddestructivetestingorchemicalanalysisonincomingmaterialsandchemicals.
TIandTIsuppliersconsidercertaininformationtobeproprietary,andthusCASnumbersandotherlimitedinformationmaynotbeavailableforrelea.
InnoeventshallTI'sliabilityarisingoutofsuchinformationexceedthetotalpurchapriceoftheTIpart(s)atissueinthisdocumentsoldbyTItoCustomeronanannualbasis.
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TAPEANDREELINFORMATION
*Alldimensionsarenominal
DevicePackage
Type
Package
Drawing
PinsSPQReel
Diameter
(mm)
Reel
Width
W1(mm)
A0
(mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
(mm)
Pin1
Quadrant
TPS63020DSJRVSONDSJ143000330.012.43.34.31.18.012.0Q1
TPS63020DSJTVSONDSJ14250180.012.43.34.31.18.012.0Q1
TPS63021DSJRVSONDSJ143000330.012.43.34.31.18.012.0Q1
TPS63021DSJTVSONDSJ14250180.012.43.34.31.18.012.0Q1
PACKAGEMATERIALSINFORMATION
14-Jul-2012
PackMaterials-Page1
芯天下--/
*Alldimensionsarenominal
DevicePackageTypePackageDrawingPinsSPQLength(mm)Width(mm)Height(mm)
TPS63020DSJRVSONDSJ143000367.0367.035.0
TPS63020DSJTVSONDSJ14250210.0185.035.0
TPS63021DSJRVSONDSJ143000367.0367.035.0
TPS63021DSJTVSONDSJ14250210.0185.035.0
PACKAGEMATERIALSINFORMATION
14-Jul-2012
PackMaterials-Page2
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IMPORTANTNOTICE
TexasInstrumentsIncorporatedanditssubsidiaries(TI)rervetherighttomakecorrections,enhancements,improvementsandother
changestoitsmiconductorproductsandshould
obtainthelatestrelevantinformationbeforeplac
miconductorproducts(alsoreferredtohereinas“components”)aresoldsubjecttoTI’stermsandconditionsofsalesuppliedatthetime
oforderacknowledgment.
TIwarrantsperformanceofitscomponentstothespecificationsapplicableatthetimeofsale,inaccordancewiththewarrantyinTI’sterms
gandotherqualitycontroltechniquesareudtotheextentTIdeemsnecessary
wheremandatedbyapplicablelaw,testingofallparametersofeachcomponentisnotnecessarily
performed.
TIassumesnoliabilityforapplicationsassistanceorthedesignofBuyers’areresponsiblefortheirproductsand
mizetherisksassociatedwithBuyers’productsandapplications,Buyersshouldprovide
adequatedesignandoperatingsafeguards.
TIdoesnotwarrantorreprentthatanylicen,eitherexpressorimplied,isgrantedunderanypatentright,copyright,maskworkright,or
otherintellectualpropertyrightrelatingtoanycombination,machine,ation
publishedbyTIregardingthird-partyproductsorrvicesdoesnotconstitutealicentousuchproductsorrvicesorawarrantyor
uchinformationmayrequirealicenfromathirdpartyunderthepatentsorotherintellectualpropertyofthe
thirdparty,oralicenfromTIunderthepatentsorotherintellectualpropertyofTI.
ReproductionofsignificantportionsofTIinformationinTIdatabooksordatasheetsispermissibleonlyifreproductioniswithoutalteration
andisaccompaniedbyallassociatedwarranties,conditions,limitations,tresponsibleorliableforsuchaltered
ationofthirdpartiesmaybesubjecttoadditionalrestrictions.
ResaleofTIcomponentsorrviceswithstatementsdifferentfromorbeyondtheparametersstatedbyTIforthatcomponentorrvice
voidsallexpressandanyimpliedwarrantiesfortheassociatedTIcomponentorrviceandisanunfairanddeceptivebusinesspractice.
TIisnotresponsibleorliableforanysuchstatements.
Buyeracknowledgesandagreesthatitissolelyresponsibleforcompliancewithalllegal,regulatoryandsafety-relatedrequirements
concerningitsproducts,andanyuofTIcomponentsinitsapplications,notwithstandinganyapplications-relatedinformationorsupport
eprentsandagreesthatithasallthenecessaryexpertitocreateandimplementsafeguardswhich
anticipatedangerousconquencesoffailures,monitorfailuresandtheirconquences,lesnthelikelihoodoffailuresthatmightcau
illfullyindemnifyTIanditsreprentativesagainstanydamagesarisingoutoftheu
ofanyTIcomponentsinsafety-criticalapplications.
Insomecas,TIcomponentschcomponents,TI’sgoalisto
helpenablecustomerstodesignandcreatetheirownend-productsolutionsthatmeetapplicablefunctionalsafetystandardsand
eless,suchcomponentsaresubjecttotheterms.
NoTIcomponentsareauthorizedforuinFDAClassIII(orsimilarlife-criticalmedicalequipment)unlessauthorizedofficersoftheparties
haveexecutedaspecialagreementspecificallygoverningsuchu.
OnlythoTIcomponentswhichTIhasspecificallydesignatedasmilitarygradeor“enhancedplastic”aredesignedandintendedforuin
military/cknowledgesandagreesthatanymilitaryoraerospaceuofTIcomponents
whichhavenotbeensodesignatedissolelyattheBuyer'srisk,andthatBuyerissolelyresponsibleforcompliancewithalllegaland
regulatoryrequirementsinconnectionwithsuchu.
TIhasspecificallydesignatedcertaincomponentswhichmeetISO/TS16949requirements,entswhich
havenotbeensodesignatedareneitherdesignednorintendedforautomotiveu;andTIwillnotberesponsibleforanyfailureofsuch
componentstomeetsuchrequirements.
ProductsApplications
//automotive
/communications
/computers
DLP®/consumer-apps
/energy
//industrial
/medical
/curity
ce,/space-avionics-defen
/video
/
/wirelessconnectivity
MailingAddress:TexasInstruments,PostOfficeBox655303,Dallas,Texas75265
Copyright©2012,TexasInstrumentsIncorporated
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