LM337 - 3-Terminal Adjustable Negative Regulator
Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

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

General 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. More...


  Typical Application
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
Error Flag No
RegType Linear Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Max -1.2 Volt


Typical Performance


*click for larger image


  Additional Resources
Application Notes


Connection Diagram


*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM137/LM337 3-Terminal Adjustable Negative Regulators 836
Kbytes
9-Nov-04 Download
LM137/LM337 3-Terminal Adjustable Negative Regulators (Japanese)
208 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM337IMPSOT-2234NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.70reel
of
1000
XYTT
N02A
6 weeks2500
LM337IMPXSOT-2234NOPB
STD
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.70reel
of
2000
XYTT
N02A
8 weeks2500
LM337TTO-2203NOPB
STD
1
1
NA
NA
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.78rail
of
45
NSUZXYTTE#
LM337T P+
8 weeks1000
LM337HTO-393NOPB
STD
1
1
NA
NA
RoHS Download Full productionN/A
 
Buy Now
1K+$5.53box
of
500
NSZXYTTE# LM337H
6 weeks1000
LM337K STEELTO-32NOPB
STD
1
1
NA
NA
RoHS Download Lifetime buyN/A
 
Buy Now
250+$23.80tray
of
50
NS
ZXYTTE#
LM337K
STEEL
6 weeks100
LM337K MWCWaferLifetime buyN/A
  CALLwafer jar
of
N/A
-
6 weeks20000

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

General 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.

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.


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Kbytes
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[Information as of 8-Nov-2009]