Texas Instruments LP3905 Handleiding
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EN1
EN2
TGND
GND
LDO2
Vin2
LDO1
0.47 PF
0.47 PF
1.0 PF
Enable 1
LDO2
Output
LDO1
Output
VSupply
10 PF
10 PF
FB2
FB1
GND_B2
GND_B1
Vin1
SW1
SW2
LP3905
Buck1
Output
Buck2
Output
VSupply
2.2 PH
2.2 PH
LDO GND
BUCK GND
10 PF
SGND
Enable 2
LP3905
www.ti.com
SNVS374D–JUNE2006–REVISEDMAY2013
LP3905PowerManagementUnitForLowPowerHandheldApplications
CheckforSamples:LP3905
1
FEATURES
KEYSPECIFICATIONS
BuckRegulators
•TwoBuckRegulatorsforPoweringHigh
CurrentProcessorFunctionsorPeripheral
•FixedandAdjustableVoltageOptions,Range
Devices
1.0Vto3.3V
(1)
•TwoLinearRegulatorsforPoweringInternal
•Upto90%Efficiency
ProcessorFunctionsandI/Os
•Auto-SwitchingPFM-PWMModeandFixed
•OneEnablePinforBuck1andLinear
PWMMode
Regulators1and2
•2MHzPWMFixedSwitchingFrequency(Typ)
•SeparateEnablePinforBuck2
•600mAOutputCurrent
•ThermalandCurrentOverloadProtection
•±4%OutputVoltageAccuracyOverTemp
•Small14–PinWSONPackage(4x4mmx0.8mm)
•InternalSoftStart
•2.2µHInductor,10µFInputandOutputCaps
APPLICATIONS
LinearRegulators
•BasebandProcessors
•OutputOptionsintheRange1.5Vto3.3V
(1)
•PeripheralProcessor(Video,Audio)
•13.5µV
rms
OutputVoltageNoise
•I/OPower
•PSRR-70dB@1kHz
•FPGAPower
•±3%OutputVoltageAccuracyOverFullLine
andLoadRegulation
DESCRIPTION
•0mAto150mAOutputCurrent
LP3905isamulti-functionalPowerManagementUnit,
optimizedforlowpowerhandheldapplications.This
•C
in
=1.0µF,C
out
=0.47µFfor100mAO/P
deviceintegratestwo600mADC-DCbuckregulators
•C
in
=1.0µF,C
out
=1.0µFfor150mAO/P
andtwo150mAlinearregulators.Fixedand
•80mVDropoutVoltage
adjustablebuckoutputversionsareavailable.The
LP3905additionallyfeaturestwoenablepinsforthe
deviceoutputcontrolandisofferedinanWSON
(1)Fixedoutputvoltagedevicescanbecustomizedtofitsystem
package.requirements.PleasecontactTexasInstrumentsSalesOffice.
TypicalApplicationCircuit
Figure1.TypicalApplicationCircuit–14-PinWSONPackage
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright©2006–2013,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | LP3905 |
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