National Semiconductor | High-performance Analog

 

 LM337   
3-Terminal Adjustable Negative Regulator 		Click link to Download

Features
  • Output voltage adjustable from -1.2V to -37V
  • 1.5A output current guaranteed, -55°C to +150°C
  • Line regulation typically 0.01%/V
  • Load regulation typically 0.3%
  • Excellent thermal regulation, 0.002%/W
  • 77 dB ripple rejection
  • Excellent rejection of thermal transients
  • 50 ppm/°C temperature coefficient
  • Temperature-independent current limit
  • Internal thermal overload protection
  • P+ Product Enhancement tested
  • Standard 3-lead transistor package
  • Output is short circuit protected

LM137 Series Packages and Power Capability

  RatedDesign
DevicePackagePowerLoad
  DissipationCurrent
LM137/337TO-3 (K)20W1.5A
 TO-39 (H)2W0.5A
LM337TO-220 (T)15W1.5A
LM337SOT-223 (MP)2W1A

Description

The LM137/LM337 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of -1.5A over an output voltage range of -1.2V to -37V. These regulators are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads.

The LM137/LM337 serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137/LM337 are ideal complements to the LM117/LM317 adjustable positive regulators.




Typical Application
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Connection Diagram
*click for larger image



Typical Performance
*click for larger image


 

ParametersValues
Output Current 1500 mA
Output Min -37 Volt
Input Min Voltage -50 Volt
Input Max Voltage -4.2 Volt
Adjustable Output Yes
On/Off Pin No
PowerGood / Error Flag No
RegType Linear Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Max -1.2 Volt

Datasheets
TitleSizeDateOther
Language
LM337 3-Terminal Adjustable Negative Regulator836
Kbytes		9-Nov-04日本語  


Other Technical Documents
TitleTypeDate
A New Production Technique for Trimming Voltage RegulatorsApp Note 2002-10-03

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
Size
LM337IMP/NOPB

LM337IMP

RoHS Status

SOT-223		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
ARROWWorldwide4229
AVNET-EMWorldwide11
DIGI-KEYWorldwide7426
FARNELLEurope and Asia1105
MOUSERWorldwide3347
NEWARKAmericas18
RSL MICROAsia Pacific5000
TAYLORAmericas6176
TECHMOSAAsia Pacific2000
$0.61 each at 1K+ pcsreel
of
1000
LM337IMPX/NOPB

LM337IMPX

RoHS Status

SOT-223		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
ARROWWorldwide3720
AVNET-EMWorldwide2000
DIGI-KEYWorldwide0
MOUSERWorldwide1862
TAYLORAmericas6366
$0.61 each at 1K+ pcsreel
of
2000
LM337T/NOPB

LM337T

RoHS Status

TO-220		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide1313
AVNET-EMWorldwide5834
BRITESTONESouth Korea34
DIGI-KEYWorldwide616
FARNELLEurope and Asia13685
MOUSERWorldwide467
NEWARKAmericas1273
ROCELECAmericas1
RS COMPONENTSWorldwide1585
RSL MICROAsia Pacific2700
TAYLORAmericas4632
$0.68 each at 1K+ pcsrail
of
45
LM337H/NOPB

LM337H

RoHS Status

TO-39		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
AVNET-EMWorldwide42
DIGI-KEYWorldwide0
MOUSERWorldwide439
$5.53 each at 1K+ pcsbox
of
500

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM337H MWC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM337HVH
LM137HVH/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337HVK STEEL
LM137K/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337K MWC
LM137KG MD8
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337K STEEL
LM137K/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337L MDC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM337LBL
LM337LM
NATIONAL SEMICONDUCTOR
05 Mar 2008

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM337.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM337 is located at RoHS Status.

Part Number(s)
(NSID)		Weight
(milligrams)		TypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LM337IMP/NOPB

LM337IMP
120.611
121.002
SOT-22341
1		260
260		DetailDownloadN/A
XYTT
N02A
LM337IMPX/NOPB

LM337IMPX
120.612
121.002
SOT-22341
1		260
260		DetailDownloadN/A
XYTT
N02A
LM337T/NOPB

LM337T
1992.315
1993.955
TO-22031
1		NA
NA		DetailDownloadN/A
NSUZXYTTE#
LM337T P+
LM337H/NOPB

LM337H
1032.657
1032.657
TO-3931
1		NA
NA		DetailDownloadN/A
NSZXYTTE# LM337H

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM337.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM337 is located at RoHS Status.

CAD Symbols and Models
Download LM337 CAD Symbols
 Models
N/A


Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM337IMPSLM04404600353250011002356520
LM337IMPXSLM04404600353250011002356520
LM337TSLM04404600353250011002356520

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.


All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM337.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM337 is located at RoHS Status.

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM337H MWC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM337HVH
LM137HVH/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337HVK STEEL
LM137K/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337K MWC
LM137KG MD8
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337K STEEL
LM137K/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM337L MDC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM337LBL
LM337LM
NATIONAL SEMICONDUCTOR
05 Mar 2008

[Information as of 3-Feb-2012]
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