2024年5月25日发(作者：章迎彤)
元器件交易网
LM105/LM305/LM305A
Voltage
Regulators
June1999
LM105/LM305/LM305A
VoltageRegulators
GeneralDescription
TheLM105seriesarepositivevoltageregulatorssimilarto
theLM100,exceptthatanextragainstagehasbeenadded
ignofthebiasingcircuitryre-
movesanyminimumloadcurrentrequirementandatthe
sametimereducesstandbycurrentdrain,permittinghigher
edirect,plug-inreplacementsfor
theLM100inbothlinearandswitchingregulatorcircuitswith
antcharacteristics
ofthecircuitsare:
DClineregulationguaranteedat0.03%/V
Ripplerejectionon0.01%V
45mAoutputcurrentwithoutexternalpasstransistor
(LM305A)
LiketheLM100,theyalsofeaturefastresponsetobothload
andlinetransients,freedomfromoscillationswithvaryingre-
sistiveandreactiveloadsandtheabilitytostartreliablyon
cuitsarebuiltonasinglesilicon
chipandaresuppliedinaTO-99metalcan.
TheLM105isspecifiedforoperationfor−55˚C≤T
A
≤
+125˚C,andtheLM305/LM305Aisspecifiedfor0˚C≤T
A
≤
+70˚C.
•
•
•
•
•
•
Outputvoltageadjustablefrom4.5Vto40V
Outputcurrentsinexcessof10Apossiblebyaddingex-
ternaltransistors
Loadregulationbetterthan0.1%,fullloadwithcurrent
limiting
SchematicandConnectionDiagrams
MetalCanPackage
DS007755-1
©
元器件交易网
AbsoluteMaximumRatings
(Note1)
IfMilitary/Aerospacespecifieddevicesarerequired,
pleasecontacttheNationalSemiconductorSalesOffice/
Distributorsforavailabilityandspecifications.
(Note5)
InputVoltage
Input-OutputDifferential
PowerDissipation(Note1)
OperatingTemperatureRange
StorageTemperatureRange
LeadTemperature(Soldering,10seconds)
LM105
50V
40V
800mW
−55˚Cto+125˚C
−65˚Cto+150˚C
300˚C
LM305
40V
40V
800mW
0˚Cto+70˚C
65˚Cto+150˚C
300˚C
LM305A
50V
40V
800mW
0˚Cto+70˚C
−65˚Cto+150˚C
300˚C
ElectricalCharacteristics
(Note2)
Parameter
InputVoltageRange
OutputVoltageRange
Input-OutputVoltage
Differential
LoadRegulation
(Note3)
R
SC
=
10Ω,T
A
=
25˚C
R
SC
=
10Ω,T
A
=
T
A(MAX)
R
SC
=
10Ω,T
A
=
T
A(MIN)
R
SC
=
0Ω,T
A
=
25˚C
R
SC
=
0Ω,T
A
=
70˚C
R
SC
=
0Ω,T
A
=
0˚C
LineRegulationT
A
=
25˚C
0˚C≤T
A
≤+70˚C
V
IN
−V
OUT
≤5V,T
A
=
25˚C
V
IN
−V
OUT
≥5V,T
A
=
25˚C
TemperatureStability
FeedbackSense
Voltage
OutputNoiseVoltage10Hz≤f≤10kHz
C
REF
=
0
C
REF
=
0.1µF
V
IN
=
30V,T
A
=
25˚C
V
IN
=
40V
V
IN
=
50V
T
A
=
25˚C,R
SC
=
10Ω,
V
OUT
=
0V,(Note4)
C
REF
=
10µF,f
=
120Hz
TO-99BoardMount
inStillAir
θ
JA
θ
JC
TO-99BoardMountin
400LF/MinAirFlow
TO-99252525˚C/W
929292˚C/W
225
T
A(MIN)
≤T
A
≤T
A(MAX)
1.63
0.025
0.015
0.3
1.7
0.06
0.03
1.0
1.811.63
0.025
0.015
0.3
1.7
0.06
0.03
1.0
1.811.55
0.025
0.015
0.3
1.7
0.06
0.03
1.0
1.85
0.02
0.03
0.03
0.05
0.1
0.1
0.02
0.03
0.03
0.05
0.1
0.1
0.02
0.03
0.03
0.2
0.4
0.4
%
%
%
%
%
%
%/V
%/V
%/V
%/V
%
V
Conditions
Min
8.5
4.5
3.0
LM105
TypMax
50
40
30
Min
8.5
4.5
3.0
LM305
TypMax
40
30
30
Min
8.5
4.5
3.0
LM305A
TypMax
50
40
30
V
V
V
Units
0≤I
O
≤12mA0≤I
O
≤12mA
0≤I
O
≤45mA
0.005
0.002
0.005
0.002
0.82.0
0.005
0.002
%
%
mA
mA
StandbyCurrentDrain
0.8
300
0.1
0.003
230
2.0
375225300
0.1
0.003
230
375225
0.8
300
0.1
0.003
230
2.0
375
mA
mV
%
%/V
˚C/W
CurrentLimit
SenseVoltage
LongTermStability
RippleRejection
θ
JA
2
2024年5月25日发(作者：章迎彤)
元器件交易网
LM105/LM305/LM305A
Voltage
Regulators
June1999
LM105/LM305/LM305A
VoltageRegulators
GeneralDescription
TheLM105seriesarepositivevoltageregulatorssimilarto
theLM100,exceptthatanextragainstagehasbeenadded
ignofthebiasingcircuitryre-
movesanyminimumloadcurrentrequirementandatthe
sametimereducesstandbycurrentdrain,permittinghigher
edirect,plug-inreplacementsfor
theLM100inbothlinearandswitchingregulatorcircuitswith
antcharacteristics
ofthecircuitsare:
DClineregulationguaranteedat0.03%/V
Ripplerejectionon0.01%V
45mAoutputcurrentwithoutexternalpasstransistor
(LM305A)
LiketheLM100,theyalsofeaturefastresponsetobothload
andlinetransients,freedomfromoscillationswithvaryingre-
sistiveandreactiveloadsandtheabilitytostartreliablyon
cuitsarebuiltonasinglesilicon
chipandaresuppliedinaTO-99metalcan.
TheLM105isspecifiedforoperationfor−55˚C≤T
A
≤
+125˚C,andtheLM305/LM305Aisspecifiedfor0˚C≤T
A
≤
+70˚C.
•
•
•
•
•
•
Outputvoltageadjustablefrom4.5Vto40V
Outputcurrentsinexcessof10Apossiblebyaddingex-
ternaltransistors
Loadregulationbetterthan0.1%,fullloadwithcurrent
limiting
SchematicandConnectionDiagrams
MetalCanPackage
DS007755-1
©
元器件交易网
AbsoluteMaximumRatings
(Note1)
IfMilitary/Aerospacespecifieddevicesarerequired,
pleasecontacttheNationalSemiconductorSalesOffice/
Distributorsforavailabilityandspecifications.
(Note5)
InputVoltage
Input-OutputDifferential
PowerDissipation(Note1)
OperatingTemperatureRange
StorageTemperatureRange
LeadTemperature(Soldering,10seconds)
LM105
50V
40V
800mW
−55˚Cto+125˚C
−65˚Cto+150˚C
300˚C
LM305
40V
40V
800mW
0˚Cto+70˚C
65˚Cto+150˚C
300˚C
LM305A
50V
40V
800mW
0˚Cto+70˚C
−65˚Cto+150˚C
300˚C
ElectricalCharacteristics
(Note2)
Parameter
InputVoltageRange
OutputVoltageRange
Input-OutputVoltage
Differential
LoadRegulation
(Note3)
R
SC
=
10Ω,T
A
=
25˚C
R
SC
=
10Ω,T
A
=
T
A(MAX)
R
SC
=
10Ω,T
A
=
T
A(MIN)
R
SC
=
0Ω,T
A
=
25˚C
R
SC
=
0Ω,T
A
=
70˚C
R
SC
=
0Ω,T
A
=
0˚C
LineRegulationT
A
=
25˚C
0˚C≤T
A
≤+70˚C
V
IN
−V
OUT
≤5V,T
A
=
25˚C
V
IN
−V
OUT
≥5V,T
A
=
25˚C
TemperatureStability
FeedbackSense
Voltage
OutputNoiseVoltage10Hz≤f≤10kHz
C
REF
=
0
C
REF
=
0.1µF
V
IN
=
30V,T
A
=
25˚C
V
IN
=
40V
V
IN
=
50V
T
A
=
25˚C,R
SC
=
10Ω,
V
OUT
=
0V,(Note4)
C
REF
=
10µF,f
=
120Hz
TO-99BoardMount
inStillAir
θ
JA
θ
JC
TO-99BoardMountin
400LF/MinAirFlow
TO-99252525˚C/W
929292˚C/W
225
T
A(MIN)
≤T
A
≤T
A(MAX)
1.63
0.025
0.015
0.3
1.7
0.06
0.03
1.0
1.811.63
0.025
0.015
0.3
1.7
0.06
0.03
1.0
1.811.55
0.025
0.015
0.3
1.7
0.06
0.03
1.0
1.85
0.02
0.03
0.03
0.05
0.1
0.1
0.02
0.03
0.03
0.05
0.1
0.1
0.02
0.03
0.03
0.2
0.4
0.4
%
%
%
%
%
%
%/V
%/V
%/V
%/V
%
V
Conditions
Min
8.5
4.5
3.0
LM105
TypMax
50
40
30
Min
8.5
4.5
3.0
LM305
TypMax
40
30
30
Min
8.5
4.5
3.0
LM305A
TypMax
50
40
30
V
V
V
Units
0≤I
O
≤12mA0≤I
O
≤12mA
0≤I
O
≤45mA
0.005
0.002
0.005
0.002
0.82.0
0.005
0.002
%
%
mA
mA
StandbyCurrentDrain
0.8
300
0.1
0.003
230
2.0
375225300
0.1
0.003
230
375225
0.8
300
0.1
0.003
230
2.0
375
mA
mV
%
%/V
˚C/W
CurrentLimit
SenseVoltage
LongTermStability
RippleRejection
θ
JA
2