LM2990   
Negative Low Dropout Regulator 		Click link to Download

Features
•5% output accuracy over entire operating range
•Output current in excess of 1A
•Dropout voltage typically 0.6V at 1A load
•Low quiescent current
•Internal short circuit current limit
•Internal thermal shutdown with hysteresis
•Functional complement to the LM2940 series

Description

The LM2990 is a three-terminal, low dropout, 1 ampere negative voltage regulator available with fixed output voltages of -5, -5.2, -12, and -15V.

The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with 1A load current and an input-output voltage differential greater than 3V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT - VIN <= 3V). Output voltage accuracy is guaranteed to ±5% over load, and temperature extremes.

The LM2990 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time. The LM2990 is available in a 3-lead TO-220 package and is rated for operation over the automotive temperature range of -40°C to +125°C.

Applications
•Post switcher regulator
•Local, on-card, regulation
•Battery operated equipment



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                                              LM2990
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Typical Application
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Connection Diagram
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Typical Performance
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ParametersValues
Output Current 1500 mA
Output Min -15, -5.2, -5, -12 Volt
Input Min Voltage -26 Volt
Input Max Voltage 0.3 Volt
Dropout Voltage 0.6 Volt
Adjustable Output No
Quiescent Current 1 mA
On/Off Pin No
Error Flag No
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Max -15, -5.2, -5, -12 Volt
Output Voltage -15, -5.2, -5, -12 Volt

Datasheet
TitleSizeDateOther
Language
LM2990 Negative Low Dropout Regulator861
Kbytes		6-Jun-05日本語
LM2990 Mil-Aero Datasheet MNLM2990-12-X188 Kbytes 
LM2990 Mil-Aero Datasheet MNLM2990-15-X188 Kbytes 
LM2990 Mil-Aero Datasheet MNLM2990-5.0-X139 Kbytes 


Featured Application Notes
TitleSizeDateOther
Language
AN-1378: Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators647
Kbytes		15-Jul-05 中文


More Application Notes
TitleSizeDateOther
Language
AN-1378: Application Note 1378 Method For Calculating Output Voltage Tolerances in Adjustable Regulators647
Kbytes		15-Jul-05 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM2990T-12/NOPB
LM2990T-12

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide270
AVNET-EMWorldwide307
DIGIKEYWorldwide1035
FARNELLEurope and Asia1077
FUTUREWorldwide1100
NEWARKAmericas261
RS COMPONENTSWorldwide40
TAYLORAmericas315
$1.35 each at 1K+ pcsrail
of
45
LM2990T-15/NOPB
LM2990T-15

RoHS

Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide855
AVNET-EMWorldwide187
DIGIKEYWorldwide195
FARNELLEurope and Asia968
FUTUREWorldwide157
KEIKONGAsia Pacific200
NEWARKAmericas196
RS COMPONENTSWorldwide50
$1.35 each at 1K+ pcsrail
of
45
LM2990T-5.0/NOPB
LM2990T-5.0

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide558
DIGIKEYWorldwide0
FARNELLEurope and Asia1333
FUTUREWorldwide222
KEIKONGAsia Pacific990
RS COMPONENTSWorldwide172
TAYLORAmericas315
$1.35 each at 1K+ pcsrail
of
45
LM2990T-5.2/NOPB
LM2990T-5.2

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide177
AVNET-EMWorldwide96
DIGIKEYWorldwide118
FARNELLEurope and Asia261
FUTUREWorldwide270
NEWARKAmericas88
TAYLORAmericas315
$1.35 each at 1K+ pcsrail
of
45
LM2990S-12/NOPB
LM2990S-12

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide1260
AVNET-EMWorldwide25
DIGIKEYWorldwide462
FUTUREWorldwide1100
NEWARKAmericas140
RS COMPONENTSWorldwide10
TAYLORAmericas115
$1.35 each at 1K+ pcsrail
of
45
LM2990S-15/NOPB
LM2990S-15

RoHS

Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide315
AVNET-EMWorldwide35
DIGIKEYWorldwide287
FUTUREWorldwide1100
NEWARKAmericas74
RS COMPONENTSWorldwide10
TAYLORAmericas315
$1.35 each at 1K+ pcsrail
of
45
LM2990S-5.0/NOPB
LM2990S-5.0

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide42
DIGIKEYWorldwide567
FUTUREWorldwide1100
NEWARKAmericas903
RS COMPONENTSWorldwide5
TAYLORAmericas219
$1.35 each at 1K+ pcsrail
of
45
LM2990SX-12/NOPB
LM2990SX-12

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide500
AVNET-EMWorldwide500
DIGIKEYWorldwide0
FUTUREWorldwide1100
$1.35 each at 1K+ pcsreel
of
500
LM2990SX-15/NOPB
LM2990SX-15

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide1000
AVNET-EMWorldwide500
DIGIKEYWorldwide0
FUTUREWorldwide300
$1.35 each at 1K+ pcsreel
of
500
LM2990SX-5.0/NOPB
LM2990SX-5.0

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide277
DIGIKEYWorldwide0
FUTUREWorldwide1100
NEWARKAmericas60
$1.35 each at 1K+ pcsreel
of
500
LM2990-15 MD8

RoHS

Lifetime buy
Lead Time: 6 weeks

 

Contact your distributor
CALLtray
of
N/A
LM2990-5.0 MD8

RoHS

Full production
Lead Time: 6 weeks

 

Contact your distributor
CALLtray
of
N/A
LM2990-5.0 MW8

RoHS

Full production
Lead Time: N/A

 

Contact your distributor
CALLwafer jar
of
N/A

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM2990-12 MD8
NONE
NATIONAL SEMICONDUCTOR
06 Dec 2005
LM2990-15 MD8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM2990J-12-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990J-15-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990J-5.0-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990T-15 MWC
NONE
NONE
08 Sep 1999
LM2990WG-12-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990WG-15-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990WG5.0-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM2990T-12/NOPB
LM2990T-12
TO-22031
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2990T
-12 P+
LM2990T-15/NOPB
LM2990T-15
TO-22031
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2990T
-15 P+
LM2990T-5.0/NOPB
LM2990T-5.0
TO-22031
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2990T
-5.0 P+
LM2990T-5.2/NOPB
LM2990T-5.2
TO-22031
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LM2990T
-5.2 P+
LM2990S-12/NOPB
LM2990S-12
TO-26333
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2990S
-12 P+
LM2990S-15/NOPB
LM2990S-15
TO-26333
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2990S
-15 P+
LM2990S-5.0/NOPB
LM2990S-5.0
TO-26333
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2990S
-5.0 P+
LM2990SX-12/NOPB
LM2990SX-12
TO-26333
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2990S
-12 P+
LM2990SX-15/NOPB
LM2990SX-15
TO-26333
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2990S
-15 P+
LM2990SX-5.0/NOPB
LM2990SX-5.0
TO-26333
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LM2990S
-5.0 P+
LM2990-15 MD8
Unpackaged DieN/A
-
LM2990-5.0 MD8
Unpackaged DieN/A
-
LM2990-5.0 MW8
WaferN/A
-

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2990-5.0 MD8SLM04404600353250011002356520
LM2990S-12SLM04404600353250011002356520
LM2990S-15SLM04404600353250011002356520
LM2990S-5.0SLM04404600353250011002356520
LM2990SX-12SLM04404600353250011002356520
LM2990SX-15SLM04404600353250011002356520
LM2990SX-5.0SLM04404600353250011002356520
LM2990T-12SLM04404600353250011002356520
LM2990T-15SLM04404600353250011002356520
LM2990T-5.0SLM04404600353250011002356520
LM2990T-5.2SLM04404600353250011002356520

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM2990-12 MD8
NONE
NATIONAL SEMICONDUCTOR
06 Dec 2005
LM2990-15 MD8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM2990J-12-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990J-15-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990J-5.0-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990T-15 MWC
NONE
NONE
08 Sep 1999
LM2990WG-12-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990WG-15-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM2990WG5.0-QML
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008

[Information as of 22-Nov-2009]