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EN1
fb1/nc
EN2
fb2/nc
NR
10
9
8
7
6
在
NC
OUT1
OUT2
地
1
2
3
4
5
drc pACKAGE
3mm x 3mm son
(t运算 视图)
80
70
60
50
40
30
20
10
0
PSRR (db)
10 100 1k 10k 100k 1M 10M
频率 (hz)
PSRR (波纹 拒绝) vs 频率
V
输出
= 2.8 V
C
输出
= 2.2
µ
F
C
NR
= 0.01
µ
F
I
输出
= 1 毫安
I
输出
= 250 毫安
tps71202,tps71219
tps71229,tps71247
tps71256,tps71257
SBVS049C–MAY2004–REVISEDJULY2005
dual250maoutput,ultralownoise,highpsrr,
低-dropoutlinearregulator
•
dual250mahigh-performancerfldos
thetps712xxfamilyoflow-落后(ldo)电压
regulatorsistailoredtonoise-sensitiveandrfappli-
•
AvailableinFixedandAdjustable
cations.theseproductsfeaturedual250maldos
voltageoptions(1.2vto5.5v)
withultralownoise,highpower-supplyrejectionratio
•
highpsrr:65dbat10khz
(psrr),andfasttransientandstart-upresponse.
•
ultralownoise:32µvrms
eachregulatoroutputisstablewithlow-cost2.2µf
ceramicoutputcapacitorsandfeaturesverylow
•
faststart-uptime:60µs
dropoutvoltages(125mvtypicalat250ma).各自
•
stablewith2.2µfceramiccapacitor
regulatorachievesfaststart-uptimes(大概
•
excellentload/linetransientresponse
60µswitha0.001µfbypasscapacitor)当
consumingverylowquiescentcurrent(300µatypical
•
verylowdropoutvoltage:125mvat250ma
withbothoutputsenabled).whenthedeviceis
•
IndependentEnablePins
placedinstandbymode,thesupplycurrentisre-
•
ThermalShutdownandIndependentCurrent
ducedtolessthan0.3µatypical.eachregulator
限制
exhibitsapproximately32µVrmsofoutputvoltage
noisewithV
输出
=2.8vanda0.01µfnoise
•
availableinthermally-enhancedson
减少(nr)电容.applicationswithanalog
包装:3mmx3mmx1mm
componentsthatarenoise-敏感的,suchasport-
ablerfelectronics,willbenefitfromhighpsrr,低
噪音,andfastlineandloadtransientfeatures.这
•
CellularandCordlessPhones
TPS712familyisofferedinathin3mmx3mmSON
•
wirelesspda/handheldproducts
packageandisfullyspecifiedfrom-40°cto+125°c
•
pcmcia/wirelesslanapplications
(t
J
).
•
digitalcamera/camcorder/internetaudio
•
dsp/fpga/asic/controllersandprocessors
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2004–2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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