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特点
描述
应用程序
typical 应用程序 电路
1.2v 3.3v
TPS3808G12 TPS3808G33 dsp
感觉 v
dd
v
dd
感觉
v
我/o
v
核心
gpio
GNDGNDGND
重置 MR
c
t
c
t
重置
DBV 包装
SOT23
(顶部 查看)
v
dd
感觉
c
t
重置
地
MR
1
2
3
6
5
4
重置
地
MR
6
5
4
v
dd
感觉
c
t
1
2
3
DRV 包装
2mm x 2mm QFN
(顶部 查看)
电源
衬垫
TPS3808
SBVS050E–MAY2004–REVISEDOCTOBER2005
lowquiescentcurrent,可编程-延迟
SupervisoryCircuit
•
电源-onresetgeneratorwithadjustable
delaytime:1.25msto10s
TheTPS3808xxxfamilyofmicroprocessor
supervisorycircuitsmonitorsystemvoltagesfrom
•
verylowquiescentcurrent:2.4
µ
Atyp
0.4vto5.0v,assertinganopendrainresetsignal
•
highthresholdaccuracy:0.5%typ
whentheSENSEvoltagedropsbelowapreset
•
FixedThresholdVoltagesforStandard
thresholdorwhenthemanualreset(mr)pindropsto
voltagerailsfrom0.9vto5vandadjustable
alogiclow.theresetoutputremainslowforthe
voltagedownto0.4vareavailable
useradjustabledelaytimeaftertheSENSEvoltage
andmanualreset(mr)returnabovetheirthresholds.
•
manualreset(mr)输入
•
打开-drainresetoutput
TheTPS3808usesaprecisionreferencetoachieve
0.5%thresholdaccuracyforv
它
≤
3.3v.thereset
•
温度范围:–40
°
Cto+125
°
c
delaytimecanbesetto20msbydisconnectingthe
•
SmallSOT23and2mm
×
2mmQFNPackages
c
t
管脚,300msbyconnectingthec
t
pintoV
dd
使用
aresistor,orcanbeuser-adjustedbetween1.25ms
and10sbyconnectingtheC
t
pintoanexternal
•
DSPorMicrocontrollerApplications
电容器.thetps3808hasaverylowtypical
quiescentcurrentof2.4
µ
asoitiswell-suitedto
•
笔记本/desktopcomputers
蓄电池-poweredapplications.itisavailableinasmall
•
pdas/手-heldproducts
sot23andanultra-small2mm
×
2mmQFN
•
便携式/蓄电池-poweredproducts
PowerPAD™packageandisfullyspecifiedovera
•
fpga/asicapplications
temperaturerangeof–40
°
Cto+125
°
c(t
j
).
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
powerpadisatrademarkoftexasinstruments.
alltrademarksarethepropertyoftheirrespectiveowners.
productiondatainformationiscurrentasofpublicationdate.
copyright©2004–2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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