Texas Instruments LP3981 Handleiding
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IN
BYPASS
LP3981
2.2 µF
EN
OUT-SENSE
OUT
2(2)
7(6)
1(1)
4(3)
6(5)
5(4)
2.2 µF
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Design
LP3981
SNVS159H–OCTOBER2001–REVISEDJULY2015
LP3981Micropower,300-mAUltra-Low-DropoutCMOSVoltageRegulator
1Features3Description
PerformanceoftheLP3981deviceisoptimizedfor
1
•2.5-Vto6-VInputRange
battery-poweredsystemstodeliverultra-low-noise,
•300-mAOutputCurrent
extremelylowdropoutvoltage,andlowquiescent
•60-dBPSRRat1kHz
current.Regulatorgroundcurrentincreasesonly
slightlyindropout,furtherprolongingthebatterylife.
•≤1-μAQuiescentCurrentWhenShutDown
•FastTurnonTime:120μs(typical)withC
BYPASS
=
Powersupplyrejectionisbetterthan60dBatlow
0.01µF
frequencies.Thishighpowersupplyrejectionis
maintaineddowntolowerinputvoltagelevels
•132-mVTypicalDropoutwith300-mALoad
commontobattery-operatedcircuits.
•35-μVrmsOutputNoiseOver10Hzto100kHz
Thedeviceisidealformobilephoneandsimilar
•LogicControlledEnable
battery-poweredwirelessapplications.Itprovidesup
•StableWithCeramicandHigh-QualityTantalum
to300mA,froma2.5-Vto6-Vinput,consumingless
Capacitors
than1µAindisablemode.
•ThermalShutdownandShort-CircuitCurrentLimit
TheLP3981isavailablein8-pinVSSOP-8and6-pin
•LowThermalResistanceinWSON-6Package
WSONpackages.Performanceisspecifiedfor−40°C
GivesExcellentPowerCapability
to+125°Ctemperaturerange.Thedeviceavailablein
thefollowingoutputvoltages:2.5V,2.7V,2.8V,
2.83V,3V,3.03Vand3.3Vasstandard.Other
2Applications
outputoptionscanbemadeavailable;contactyour
•CDMACellularHandsets
localTIsalesofficeformoreinformation.
•WidebandCDMACellularHandsets
DeviceInformation
(1)
•GSMCellularHandsets
PARTNUMBERPACKAGEBODYSIZE(NOM)
•PortableInformationAppliances
WSON(6)4.00mmx3.00mm
LP3981
VSSOP(8)3.00mmx3.00mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
TypicalApplicationCircuit
Note:PinnumbersinparenthesisindicateWSONpackage.
1
AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
Product specificaties
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | LP3981 |
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