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LM137/LM337-N 3-Terminal Adjustable Negative Regulators
Check for Samples: LM137,LM337-N
1FEATURES DESCRIPTION
The LM137/LM337-N are adjustable 3-terminal
2• Output Voltage Adjustable from −1.2V to −37V negative voltage regulators capable of supplying in
• 1.5A Output Current Specified, −55°C to excess of −1.5A over an output voltage range of
+150°C −1.2V to −37V. These regulators are exceptionally
• Line Regulation Typically 0.01%/V easy to apply, requiring only 2 external resistors to
set the output voltage and 1 output capacitor for
• Load Regulation Typically 0.3% frequency compensation. The circuit design has been
• Excellent Thermal Regulation, 0.002%/W optimized for excellent regulation and low thermal
• 77 dB Ripple Rejection transients. Further, the LM137 series features internal
current limiting, thermal shutdown and safe-area
• Excellent Rejection of Thermal Transients compensation, making them virtually blowout-proof
• 50 ppm/°C Temperature Coefficient against overloads.
• Temperature-independent Current Limit The LM137/LM337-N serve a wide variety of
• Internal Thermal Overload Protection applications including local on-card regulation,
• P+Product Enhancement Tested programmable-output voltage regulation or precision
current regulation. The LM137/LM337-N are ideal
• Standard 3-lead Transistor Package complements to the LM117/LM317 adjustable
• Output is Short Circuit Protected positive regulators.
Table 1. LM137 Series Packages and Power
Capability
Device Package Rated Power Design
Dissipation Load
Current
LM137/337-N TO-3 (K) 20W 1.5A
TO (NDT) 2W 0.5A
LM337-N TO-220 (NDE) 15W 1.5A
LM337-N SOT-223 (DCY) 2W 1A
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Copyright © 1999–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
LM137, LM337-N
SNVS778D –MAY 1999–REVISED APRIL 2013
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Typical Applications
Full output current not available at high input-output voltages
†C1 = 1 μF solid tantalum or 10 μF aluminum electrolytic required for stability
*C2 = 1 μF solid tantalum is required only if regulator is more than 4″from power-supply filter capacitor
Output capacitors in the range of 1 μF to 1000 μF of aluminum or tantalum electrolytic are commonly used to provide
improved output impedance and rejection of transients
Figure 1. Adjustable Negative Voltage Regulator
Comparison between SOT-223 and D-Pak (TO-252) Packages
Figure 2. Scale 1:1
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
ABSOLUTE MAXIMUM RATINGS(1)(2)
Power Dissipation Internally Limited
Input-Output Voltage Differential 40V
Operating Junction Temperature Range
LM137 −55°C to +150°C
LM337-N 0°C to +125°C
LM337I −40°C to +125°C
Storage Temperature −65°C to +150°C
Lead Temperature (Soldering, 10 sec.) 300°C
Plastic Package (Soldering, 4 sec.) 260°C
ESD Rating 2k Volts
(1) Refer to RETS137H drawing for LM137H or RETS137K drawing for LM137K military specifications.
(2) Unless otherwise specified, these specifications apply −55°C ≤Tj≤+150°C for the LM137, 0°C ≤Tj≤+125°C for the LM337-N; VIN −
VOUT = 5V; and IOUT = 0.1A for the TO package and IOUT = 0.5A for the TO-3, SOT-223 and TO-220 packages. Although power
dissipation is internally limited, these specifications are applicable for power dissipations of 2W for the TO and SOT-223 (see
APPLICATION HINTS), and 20W for the TO-3, and TO-220. IMAX is 1.5A for the TO-3, SOT-223 and TO-220 packages, and 0.2A for the
TO package.
ELECTRICAL CHARACTERISTICS(1)
Parameter Conditions LM137 LM337 Units
Min Typ Max Min Typ Max
Line Regulation Tj= 25°C, 3V ≤|VIN −VOUT|≤40V 0.01 0.02 0.01 0.04 %/V
(2)IL= 10 mA
Load Regulation Tj= 25°C, 10 mA ≤IOUT ≤IMAX 0.3 0.5 0.3 1.0 %
Thermal Regulation Tj= 25°C, 10 ms Pulse 0.002 0.02 0.003 0.04 %/W
Adjustment Pin Current 65 100 65 100 μA
Adjustment Pin Current Charge 10 mA ≤IL≤IMAX 2 5 2 5 μA
3.0V ≤|VIN −VOUT|≤40V,
TA= 25°C
Reference Voltage Tj= 25°C (3) −1.225 −1.250 −1.275 −1.213 −1.250 −1.287 V
3V ≤|VIN −VOUT|≤40V, (3) −1.200 −1.250 −1.300 −1.200 −1.250 −1.300 V
10 mA ≤IOUT ≤IMAX, P ≤PMAX
Line Regulation 3V ≤|VIN −VOUT|≤40V, (2) 0.02 0.05 0.02 0.07 %/V
Load Regulation 10 mA ≤IOUT ≤IMAX,(2) 0.3 1 0.3 1.5 %
Temperature Stability TMIN ≤Tj≤TMAX 0.6 0.6 %
Minimum Load Current |VIN −VOUT|≤40V 2.5 5 2.5 10 mA
|VIN −VOUT|≤10V 1.2 3 1.5 6 mA
(1) Unless otherwise specified, these specifications apply −55°C ≤Tj≤+150°C for the LM137, 0°C ≤Tj≤+125°C for the LM337-N; VIN −
VOUT = 5V; and IOUT = 0.1A for the TO package and IOUT = 0.5A for the TO-3, SOT-223 and TO-220 packages. Although power
dissipation is internally limited, these specifications are applicable for power dissipations of 2W for the TO and SOT-223 (see
APPLICATION HINTS), and 20W for the TO-3, and TO-220. IMAX is 1.5A for the TO-3, SOT-223 and TO-220 packages, and 0.2A for the
TO package.
(2) Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation. Load regulation is measured on the output pin at a point ⅛in.
below the base of the TO-3 and TO packages.
(3) Selected devices with tightened tolerance reference voltage available.
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ELECTRICAL CHARACTERISTICS(1) (continued)
Parameter Conditions LM137 LM337 Units
Min Typ Max Min Typ Max
Current Limit |VIN −VOUT|≤15V
K, DCY and NDE Package 1.5 2.2 3.5 1.5 2.2 3.7 A
NDT Package 0.5 0.8 1.8 0.5 0.8 1.9 A
|VIN −VOUT| = 40V, Tj= 25°C
K, DCY and NDE Package 0.24 0.4 0.15 0.4 A
NDT Package 0.15 0.17 0.10 0.17 A
RMS Output Noise, % of VOUT Tj= 25°C, 10 Hz ≤f≤10 kHz 0.003 0.003 %
Ripple Rejection Ratio VOUT =−10V, f = 120 Hz 60 60 dB
CADJ = 10 μF 66 77 66 77 dB
Long-Term Stability Tj= 125°C, 1000 Hours 0.3 1 0.3 1 %
Thermal Resistance, Junction to NDT Package 12 15 12 15 °C/W
Case K Package 2.3 3 2.3 3 °C/W
NDE Package 4 °C/W
Thermal Resistance, Junction to NDT Package 140 140 °C/W
Ambient (No Heat Sink) K Package 35 35 °C/W
NDE Package 50 °C/W
DCY Package 170 °C/W
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SCHEMATIC DIAGRAM
Thermal Regulation
When power is dissipated in an IC, a temperature gradient occurs across the IC chip affecting the individual IC
circuit components. With an IC regulator, this gradient can be especially severe since power dissipation is large.
Thermal regulation is the effect of these temperature gradients on output voltage (in percentage output change)
per Watt of power change in a specified time. Thermal regulation error is independent of electrical regulation or
temperature coefficient, and occurs within 5 ms to 50 ms after a change in power dissipation. Thermal regulation
depends on IC layout as well as electrical design. The thermal regulation of a voltage regulator is defined as the
percentage change of VOUT, per Watt, within the first 10 ms after a step of power is applied. The LM137's
specification is 0.02%/W, max.
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LM137, VOUT =−10V
VIN −VOUT =−40V
IIL = 0A →0.25A →0A
Vertical sensitivity, 5 mV/div
Figure 3.
In Figure 3, a typical LM137's output drifts only 3 mV (or 0.03% of VOUT =−10V) when a 10W pulse is applied for
10 ms. This performance is thus well inside the specification limit of 0.02%/W × 10W = 0.2% max. When the
10W pulse is ended, the thermal regulation again shows a 3 mV step at the LM137 chip cools off. Note that the
load regulation error of about 8 mV (0.08%) is additional to the thermal regulation error. In Figure 4, when the
10W pulse is applied for 100 ms, the output drifts only slightly beyond the drift in the first 10 ms, and the thermal
error stays well within 0.1% (10 mV).
LM137, VOUT =−10V
VIN −VOUT =−40V
IL= 0A →0.25A →0A
Horizontal sensitivity, 20 ms/div
Figure 4.
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Connection Diagrams
Case Is Input
See STD Mil DWG 5962P99517 for
Radiation Tolerant Devices
Case is Input Figure 6. TO
Metal Can Package
Figure 5. TO-3 Bottom View
Metal Can Package See Package Number NDT0003A
Bottom View
See Package Number K0002C
See Package Number NDS0002A
Figure 7. TO-220
Plastic Package
Front View
See Package Number NDE0003B
Figure 8. 3-Lead SOT-223
Front View
Package Marked N02A
See Package Number DCY0004A
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APPLICATION HINTS
When a value for θ(H−A) is found using the equation shown, a heatsink must be selected that has a value that is
less than or equal to this number.
HEATSINKING SOT-223 PACKAGE PARTS
The SOT-223 (“DCY”) packages use a copper plane on the PCB and the PCB itself as a heatsink. To optimize
the heat sinking ability of the plane and PCB, solder the tab of the package to the plane.
Figure 9 and Figure 10 show the information for the SOT-223 package. Figure 10 assumes a θ(J−A) of 75°C/W for
1 ounce copper and 51°C/W for 2 ounce copper and a maximum junction temperature of 125°C.
Figure 9. θ(J−A) vs Copper (2 ounce) Area for the SOT-223 Package
Figure 10. Maximum Power Dissipation vs. TAMB for the SOT-223 Package
Please see AN-1028 (literature number SNVA036) for power enhancement techniques to be used with the SOT-
223 package.
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Typical Applications
Figure 11. Adjustable Lab Voltage Regulator
Full output current not available
at high input-output voltages
*The 10 μF capacitors are optional to improve ripple rejection
Figure 12. Current Regulator
Figure 13. Negative Regulator with Protection Diodes
*When CLis larger than 20 μF, D1 protects the LM137 in case the input supply is shorted
**When C2 is larger than 10 μF and −VOUT is larger than −25V, D2 protects the LM137 in case the output is shorted
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Figure 14. −5.2V Regulator with Electronic Shutdown*
*Minimum output ≃−1.3V when control input is low
Figure 15. Adjustable Current Regulator
Figure 16. High Stability −10V Regulator
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TYPICAL PERFORMANCE CHARACTERISTICS
(K Steel and NDE Packages)
Load Regulation Current Limit
Figure 17. Figure 18.
Adjustment Current Dropout Voltage
Figure 19. Figure 20.
Temperature Stability Minimum Operating Current
Figure 21. Figure 22.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
(K Steel and NDE Packages)
Ripple Rejection Ripple Rejection
Figure 23. Figure 24.
Ripple Rejection Output Impedance
Figure 25. Figure 26.
Line Transient Response Load Transient Response
Figure 27. Figure 28.
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REVISION HISTORY
Changes from Revision C (April 2013) to Revision D Page
• Changed layout of National Data Sheet to TI format .......................................................................................................... 12
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PACKAGE OPTION ADDENDUM
www.ti.com 1-Nov-2013
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
LM137H ACTIVE TO NDT 3 500 Green (RoHS
& no Sb/Br) AU Level-1-NA-UNLIM -55 to 150 LM137HP+
LM137H/NOPB ACTIVE TO NDT 3 500 Green (RoHS
& no Sb/Br) AU Level-1-NA-UNLIM -55 to 150 LM137HP+
LM337H ACTIVE TO NDT 3 500 Green (RoHS
& no Sb/Br) AU Level-1-NA-UNLIM -40 to 125 LM337H
LM337H/NOPB ACTIVE TO NDT 3 500 Green (RoHS
& no Sb/Br) AU Level-1-NA-UNLIM -40 to 125 LM337H
LM337IMP NRND SOT-223 DCY 4 1000 TBD Call TI Call TI -40 to 125 N02A
LM337IMP/NOPB ACTIVE SOT-223 DCY 4 1000 Green (RoHS
& no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 N02A
LM337IMPX NRND SOT-223 DCY 4 2000 TBD Call TI Call TI -40 to 125 N02A
LM337IMPX/NOPB ACTIVE SOT-223 DCY 4 2000 Green (RoHS
& no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 N02A
LM337T NRND TO-220 NDE 3 45 TBD Call TI Call TI -40 to 125 LM337T P+
LM337T/LF01 ACTIVE TO-220 NDG 3 45 Pb-Free (RoHS
Exempt) CU SN Level-3-245C-168 HR LM337T P+
LM337T/NOPB ACTIVE TO-220 NDE 3 45 Pb-Free (RoHS
Exempt) CU SN Level-1-NA-UNLIM -40 to 125 LM337T P+
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
PACKAGE OPTION ADDENDUM
www.ti.com 1-Nov-2013
Addendum-Page 2
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
LM337IMP SOT-223 DCY 4 1000 330.0 16.4 7.0 7.5 2.2 12.0 16.0 Q3
LM337IMP/NOPB SOT-223 DCY 4 1000 330.0 16.4 7.0 7.5 2.2 12.0 16.0 Q3
LM337IMPX SOT-223 DCY 4 2000 330.0 16.4 7.0 7.5 2.2 12.0 16.0 Q3
LM337IMPX/NOPB SOT-223 DCY 4 2000 330.0 16.4 7.0 7.5 2.2 12.0 16.0 Q3
PACKAGE MATERIALS INFORMATION
www.ti.com 24-Apr-2013
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
LM337IMP SOT-223 DCY 4 1000 367.0 367.0 35.0
LM337IMP/NOPB SOT-223 DCY 4 1000 367.0 367.0 35.0
LM337IMPX SOT-223 DCY 4 2000 367.0 367.0 35.0
LM337IMPX/NOPB SOT-223 DCY 4 2000 367.0 367.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 24-Apr-2013
Pack Materials-Page 2
MECHANICAL DATA
NDT0003A
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H03A (Rev D)
MECHANICAL DATA
NDE0003B
www.ti.com
MECHANICAL DATA
NDG0003F
www.ti.com
T03F (Rev B)
MECHANICAL DATA
MPDS094A – APRIL 2001 – REVISED JUNE 2002
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DCY (R-PDSO-G4) PLASTIC SMALL-OUTLINE
4202506/B 06/2002
6,30 (0.248)
6,70 (0.264)
2,90 (0.114)
3,10 (0.122)
6,70 (0.264)
7,30 (0.287) 3,70 (0.146)
3,30 (0.130)
0,02 (0.0008)
0,10 (0.0040)
1,50 (0.059)
1,70 (0.067)
0,23 (0.009)
0,35 (0.014)
1 2 3
4
0,66 (0.026)
0,84 (0.033)
1,80 (0.071) MAX
Seating Plane
0°–10°
Gauge Plane
0,75 (0.030) MIN
0,25 (0.010)
0,08 (0.003)
0,10 (0.004) M
2,30 (0.091)
4,60 (0.181) M
0,10 (0.004)
NOTES: A. All linear dimensions are in millimeters (inches).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion.
D. Falls within JEDEC TO-261 Variation AA.
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