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LP2950ACN-5-0 PDF预览

LP2950ACN-5-0

更新时间: 2024-01-24 21:14:10
品牌 Logo 应用领域
艾科嘉 - EXAR 稳压器
页数 文件大小 规格书
16页 806K
描述
100mA, LOW DROPOUT VOLTAGE REGULATORS

LP2950ACN-5-0 数据手册

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LP2950/51  
C
O
N
DITIONS  
L
P2  
9
5
1
A
C
L
P2  
9
5
1
C
P
A
R
A
ME  
T
E
R
(Note2)  
Min. Typ.  
Min. Typ. Max.  
U
NITS  
Max.  
8-PinVersionsonly(Continued)  
ReferenceVoltage  
Temperature  
Coefficient  
20  
50  
p
p
m/°C  
FeedbackPinBias  
Current  
0.1  
0.1  
nA/°C  
Temperature  
Coefficient  
ErrorComparator  
OutputLeakage  
Current  
V =30  
V
0.0  
1
1
0.0  
1
1
μ
A
O
H
OutputLo  
w
Voltage V =4.5  
V
1
5
0
2
5
0
1
5
0
2
50  
m
V
V
I
N
I L=4  
0
0μ  
A
O
UpperThreshold  
(Note7)  
(Note7)  
(Note7)  
40  
6
0
40  
6
0
m
Voltage  
LowerThreshold  
Voltage  
75  
15  
95  
75  
15  
95  
mV  
mV  
Hysteresis  
S
h
utdownIn  
put  
InputlogicVoltage  
Low(RegulatorON)  
1.3  
30  
0.7  
50  
10  
1.3  
0.7  
V
High(RegulatorOFF)  
2.0  
2.0  
V
ShutdownPinInput V =2.4V  
30  
50  
μA  
μA  
S
Current  
V =30V  
675 800  
675  
800  
S
RegulatorOutput  
CurrentinShutdown  
Thermal  
(Note8)  
3
3
10  
μA  
8PinSOIC  
3PinTO-92  
°C/W  
128.4  
Resistanceθ  
JA  
°C/W  
131.  
9
Note1: Outputorreferencevoltagetemperaturecoefficientsdefinedastheworstcasevoltagechangedividedbythetotaltemperaturerange.  
Note2:UnlessotherwisespecifiedalllimitsguaranteedforT =25°C,V =6V,IL=1  
0
0μAandC =1  
μ
F. Additionalco  
n
ditionsforthe8-pinversionsarefeedback  
J
IN  
L
tiedto5Vtapandoutputtiedtooutputsense(V T=5V)andV U WN 0.8V.  
U
S
D
O
Note3:RegulationismeasuredatconstantjunctOiontemperature,HusTingpulsetestingwithalo  
wd  
utycycle. Changesinoutputvoltageduetoheatingeffectsare  
coveredu  
n
derthespecificationforthermalregulation.  
Note4: LineregulationfortheLP2  
9
5
1istestedatI =1  
m
A. ForIL=1  
0
0 μAandT =1  
2
5°C,lineregulationisguaranteedbydesignto0.2%. Seetypical  
L
J
performancecharacteristicsforlineregulationversustemperatureandloadcurrent.  
Note5:Dro  
p
o
utvoltageisdefinedastheinputtooutputdifferentialatwhichtheoutputvoltagedrops100m  
V
belowitsn  
o
minalvaluemeasuredat1  
Vdifferential.At  
verylo  
w
valuesofprogrammedoutputvoltage,theminimumin  
p
utsupplyvoltageof2V(2.3  
Vovertemperature)mustbetakenintoaccount.  
Note6:V E  
V
UT (V -1V),2.3 VIN3  
0
V,1  
0
0
μ
AI 1  
0
0
m
A,T TJM  
.
R
O
IN  
L
J
A
X
Note7:ComFparatorthresholdsareexpressedintermsofavoltagedifferentialatthefeedbackterminalbelowthen  
o
minalreferencevoltagemeasuredat6Vin  
p
ut. To  
expressthesethresholdsintermsofoutputvoltagechange,multiplybytheerroramplifiergain=V UT/V F=(R +R )/R . Forexample,ataprogrammedoutput  
O
R
E
1
2
2
voltageof5V,theerroroutputisguaranteedtogolo  
wwhentheoutputdropsby95m  
Vx5V/1.2  
35=384mV.ThresholdsremainconstantasapercentofV UTasV U  
O
O T  
isvaried,withthedro  
p
o
utwarningoccurringattypically5%below  
n
o
minal,7.5%guaranteed.  
Note8: V  
WN 2V,V 3  
0
V,V U =0,Feedbackpintiedto5  
V
Tap.  
S
H T  
D
IN  
O T  
Note9: AlltUypiOcalvaluesarenotguaranteed.Thevaluecouldvaryfromlottolot.  
© 2008 Exar Corporation  
Rev G  
LP2950-5ꢀ Low Dropout Linear Regulators  
3

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