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FEATURESDESCRIPTION
应用程序
出点
nc − 否 内部 连接
1
2
3
4
5
dcq p组件
NR
出点
地
入点
en
2
1
3
4
7
8
6
5
nc
fb
NR
入点
nc
en
地
sot223-6
(top 查看)
dgn p组件
msop powerp广告
(top 查看)
我
出点
= 10 ma
我
出点
= 250 ma
v
入点
= 4.3 v,
v
出点
= 3.3 v,
c
入点
= 1
µ
f,
c
出点
= 10
µ
f,
c
NR
= 0.01
µ
f
40
20
10
10 100 1 k 10 k
波纹 拒收 (db)
60
70
频率 (赫兹)
TPS79433
波纹拒收
vs
频率
90
100 k 1 m 10 m
0
30
50
80
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
我
出点
= 250 ma
我
出点
= 1 ma
c
出点
= 2.2
µ
f,
c
NR
= 0.1
µ
f,
v
入点
= 3.8 v
TPS79428
输出光谱 噪声 密度
vs
频率
频率(赫兹)
100 1000 10000 100000
6
地
输出 光谱 噪声 密度 (
µ
v/
√
赫兹)
tps79401,tps79418
tps79425,tps79428
tps79430,tps79433
SLVS349D–NOVEMBER2001–REVISEDOCTOBER2004
超低-噪声,highpsrr,fastrf250-malow-dropoutlinear
调节器
•
250-malow-dropoutregulatorwithenable
thetps794xxfamilyoflow-辍学(ldo)线性
voltageregulatorsfeatureshighpower-supplyrejec-
•
availablein1.8v,2.5v,2.8v,3v,3.3v,和
tionratio(psrr),超低-噪声,faststart-向上,和
可调(1.2vto5.5v)
excellentlineandloadtransientresponsesinsmall
•
highpsrr(60dbat10khz)
大纲,msop-8powerpad™andsot223-6pack-
•
ultralownoise(32µvrms,tps79428)
年龄.eachdeviceinthefamilyisstablewithasmall
2.2-µfceramiccapacitorontheoutput.thefamily
•
faststart-uptime(50µs)
usesanadvanced,proprietarybicmosfabrication
•
stablewitha2.2-µfceramiccapacitor
processtoyieldextremelylowdropoutvoltages(e?.g.,
•
excellentload/linetransientresponse
155mvat250ma).eachdeviceachievesfast
开始-uptimes(approximately50µswitha0.001-µf
•
verylowdropoutvoltage(155mvatfull
bypasscapacitor)whileconsuminglowquiescent
荷载)
电流(170µatypical).此外,whenthedevice
•
availableinmsop-8andsot223-6packages
isplacedinstandbymode,thesupplycurrentis
reducedtolessthan1µa.thetps79428exhibits
approximately32µV
rms
ofoutputvoltagenoiseat
•
rf:vcos,接收器,adcs
2.8voutputwitha0.1-µfbypasscapacitor.应用程序-
cationswithanalogcomponentsthatare
•
音频
噪声敏感,suchasportablerfelectronics,
•
bluetooth™,wirelesslan
benefitfromthehighPSRRandlownoisefeaturesas
•
CellularandCordlessTelephones
wellasthefastresponsetime.
•
handheldorganizers,pdas
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
bluetoothisatrademarkofbluetoothsig,公司
powerpadisatrademarkoftexasinstruments.
allothertrademarksarethepropertyoftheirrespectiveowners.
productiondatainformationiscurrentasofpublicationdate.
copyright©2001–2004,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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