LM137QML
March 21, 2012
3-Terminal Adjustable Negative Regulators
General Description
The LM137 are adjustable 3-terminal negative voltage regu-
lators capable of supplying in excess of −1.5A over an output
voltage range of −37V to −1.2V. These regulators are excep-
tionally easy to apply, requiring only 2 external resistors to set
the output voltage and 1 output capacitor for frequency com-
pensation. The circuit design has been optimized for excellent
regulation and low thermal transients. Further, the LM137 se-
ries features internal current limiting, thermal shutdown and
safe-area compensation, making them virtually blowout-proof
against overloads.
The LM137 serve a wide variety of applications including local
on-card regulation, programmable-output voltage regulation
or precision current regulation. The LM137 are ideal comple-
ments to the LM117 adjustable positive regulators.
Features
■Output voltage adjustable from −37V to −1.2V
■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
■Standard 3-lead transistor package
■Output is short circuit protected
LM137 Series Packages and Power Capability
Rated Design
Device Package Power Load
Dissipation Current
LM137 TO-3 (K) 20W 1.5A
TO-39 (H) 2W 0.5A
Ordering Information
NS Part Number SMD Part Number NS Package Number Package Description
LM137K/883 K02C 2LD Low Profile T0–3 Metal Can
LM137H/883 H03A 3LD T0–39 Metal Can
LM137HPQMLV 5962P9951701VXA
30k rd(Si) H03A 3LD T0–39 Metal Can
LM137H1PQMLV 5962P9951708VXA
30k rd(Si) H03A 3LD T0–39 Metal Can
LM137H MD8 (Note 1) Bare Die
LM137KG MD8 (Note 1) Bare Die
Note 1: FOR ADDITIONAL DIE INFORMATION, PLEASE VISIT THE HI REL WEB SITE AT: www.national.com/analog/space/level_die
© 2012 Texas Instruments Incorporated 201224 SNVS313B www.ti.com
LM137QML 3-Terminal Adjustable Negative Regulators
Connection Diagrams
TO-3
Metal Can Package
20122405
Case is Input
Bottom View
See NS Package Number K02C
TO-39
Metal Can Package
20122406
Case Is Input
Bottom View
See NS Package Number H03A
Typical Applications
Adjustable Negative Voltage Regulator
20122401
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
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LM137QML
Absolute Maximum Ratings (Note 2)
Power Dissipation (Note 3) Internally Limited
Input-Output Voltage Differential 40V
Operating Ambient Temperature Range −55°C ≤ TA ≤ +125°C
Operating Junction Temperature Range −55°C ≤ TJ ≤ +150°C
Storage Temperature −65°C ≤ TA ≤ +150°C
Maximum Junction Temperature 150°C
Lead Temperature (Soldering, 10 sec.) 300°C
Minimum Input Voltage −41.25V
Maximum Power Dissipation (@25°C)
T0–3 28 Watts
T0–39 2.5 Watts
Thermal Resistance
θJA
T0–3 Metal Can (Still Air) 40°C/W
T0–3 Metal Can (500LF/Min Air Flow) 14°C/W
T0–39 Metal Can (Still Air @ 0.5W) 174°C/W
T0–39 Metal Can (500LF/Min Air Flow @ 0.5W) 64°C/W
θJC
T0–3 4°C/W
T0–39 Metal Can (@ 1.0W) 15°C/W
Package Weight (typical)
T0–3 12,750mg
T0–39 Metal Can 955mg
ESD Rating (Note 6) 4000V
Recommended Operating Conditions
TA−55°C ≤ TA ≤ +125°C
Input Voltage Range −41.25V to −4.25V
Quality Conformance Inspection
Mil-Std-883, Method 5005 — Group A
Subgroup Description Temp (°C)
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
3 www.ti.com
LM137QML
LM137H 883 Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified. VIN = −4.25V, IL = 8mA, VOUT = VRef
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
VRef Reference Voltage
-1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VIN = -42V -1.275 -1.225 V 1
VIN = -41.3V -1.3 -1.2 V 2, 3
IQMinimum Load Current
VOUT = -1.7V 3.0 mA 1, 2, 3
VOUT = -1.7V, VIN = -11.75V 3.0 mA 1, 2, 3
VOUT = -1.7V, VIN = -42V 5.0 mA 1
VOUT = -1.7V, VIN = -41.3V 5.0 mA 2, 3
RLine Line Regulation -42V ≤ VIN ≤ -4.25V -9.0 9.0 mV 1
-41.3V ≤ VIN ≤ -4.25V -23 23 mV 2, 3
RLoad Load Regulation
5mA ≤ IL ≤ 500mA, VIN = -6.25V -25 25 mV 1, 2, 3
5mA ≤ IL ≤ 500mA, VIN = -14.5V -25 25 mV 1
5mA ≤ IL ≤ 150mA, VIN = -40V -25 25 mV 1, 2, 3
IAdj Adjustment Pin Current
IL = 5 mA 100 µA 1, 2, 3
VIN = -42V 100 µA 1
VIN = -41.3V 100 µA 2, 3
Δ IAdj / VLine
Adjust Pin Current Change vs.
Line Voltage
-42V ≤ VIN ≤ -4.25V, IL = 5 mA -5.0 5.0 µA 1
-41.3V ≤ VIN ≤ -4.25V, IL = 5 mA -5.0 5.0 µA 2, 3
Δ IAdj / ILoad Adjust Pin Current Change vs.
Load Current 5 mA ≤ IL ≤ 500 mA, VIN = -6.5V -5.0 5.0 µA 1, 2, 3
θRThermal Regulation
VIN = -14.5V, IL = 500mA,
t = 10mS -5.0 5.0 mV 1
VIN = -14.5V, IL = 5mA,
t = 10mS -5.0 5.0 mV 1
θJC Thermal Resistance (Note 7) 15 °C/W 1
ICL Current Limit VIN = -5V -1.8 -0.5 A 1, 2, 3
VIN = -40V -0.65 -0.15 A 1, 2, 3
VOOutput Voltage -1.28 -1.22 V 1
-1.3 -1.2 V 2, 3
AC Parameters
RRRipple Rejection Ratio
VIN = -6.25V, VOUT = VRef,
IL = 125mA, eI = 1VRMS,
F = 120Hz
(Note 5,
Note 8)66 dB 4, 5, 6
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LM137QML
LM137K 883 Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified. VIN = −4.25V, IL = 8mA, VOUT = VRef
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
VRef Reference Voltage
-1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VIN = -42V -1.275 -1.225 V 1
VIN = -41.3V -1.3 -1.2 V 2, 3
IQMinimum Load Current
VOUT = -1.7V 3.0 mA 1, 2, 3
VOUT = -1.7V, VIN = -11.75V 3.0 mA 1, 2, 3
VOUT = -1.7V, VIN = -42V 5.0 mA 1
VOUT = -1.7V, VIN = -41.3V 5.0 mA 2, 3
RLine Line Regulation -42V ≤ VIN ≤ -4.25V -9.0 9.0 mV 1
-41.3V ≤ VIN ≤ -4.25V -23 23 mV 2, 3
RLoad Load Regulation
VIN = -6.25V, 8mA ≤ IL ≤ 1.5A -25 25 mV 1, 2, 3
VIN = -14.5V, 8mA ≤ IL ≤ 1.5A -25 25 mV 1
VIN = -40V, 8mA ≤ IL ≤ 300 mA -25 25 mV 1
VIN = -40V, 8mA ≤ IL ≤ 250 mA -25 25 mV 2, 3
IAdj Adjustment Pin Current
100 µA 1, 2, 3
VIN = -42V 100 µA 1
VIN = -41.3V 100 µA 2, 3
Δ IAdj / VLine Adjust Pin Current Change vs.
Line Voltage
-42V ≤ VIN ≤ -4.25V -5.0 5.0 µA 1
-41.3V ≤ VIN ≤ -4.25V -5.0 5.0 µA 2, 3
Δ IAdj / ILoad Adjust Pin Current Change vs.
Load Current
8 mA ≤ IL ≤ 1.5A, VIN = -6.25V -5.0 5.0 µA 1, 2, 3
VRth Thermal Regulation
VIN = -14.5V, IL = 1.5mA,
t = 10mS -5.0 5.0 mV 1
VIN = -14.5V, IL = 8mA, t = 10mS -5.0 5.0 mV 1
θJC Thermal Resistance (Note 7) 4.0 °C/W 1
ICL Current Limit VIN = -5V -3.5 -1.5 A 1, 2, 3
VIN = -40V -1.2 -0.24 A 1, 2, 3
AC Parameters
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
RRRipple Rejection Ratio
VIN = -6.25V, VOUT = VRef,
f = 120Hz, IL = 0.5A,
eI = 1VRMS
(Note 5,
Note 8)66 dB 4, 5, 6
5 www.ti.com
LM137QML
LM137H RH Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified. (Note 14)
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
VOUT Output Voltage
VIN = -4.25V, IL = 5mA -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VIN = -4.25V, IL = 500mA -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VIN = -41.25V, IL = 5mA -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VIN = -41.25V, IL = 50mA -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VR Line Line Regulation VIN = -41.25V to -4.25V,
IL = 5mA
-9.0 9.0 mV 1
-23 23 mV 2, 3
VR Load Load Regulation
VIN = -6.25V, IL = 5mA to 500mA -12 12 mV 1
-24 24 mV 2, 3
VIN = -41.25V, IL = 5mA to 50mA -6.0 6.0 mV 1
-12 12 mV 2, 3
VIN = -6.25V, IL = 5mA to 200mA -6.0 6.0 mV 1
-12 12 mV 2, 3
VRth Thermal Regulation VIN = -14.6V, IL = 500mA -5.0 5.0 mV 1
IAdj Adjust Pin Current VIN = -4.25V, IL = 5mA 25 100 µA 1, 2, 3
VIN = -41.25V, IL = 5mA 25 100 µA 1, 2, 3
Δ IAdj / VLine Adjust Pin Current Change vs.
Line Voltage
VIN = -41.25V to -4.25V,
IL = 5mA -5.0 5.0 µA 1, 2, 3
Δ IAdj / ILoad Adjust Pin Current Change vs.
Load Current VIN = -6.25V, IL = 5mA to 500mA -5.0 5.0 µA 1, 2, 3
IOS Output Short Circuit Current VIN = -4.25V 0.5 1.8 A 1, 2, 3
VIN = -40V 0.05 0.5 A 1, 2, 3
VOUT
Recovery
Output Voltage Recovery After
Output Short Circuit Current
VIN = -4.25V -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VIN = -40V -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
IQMinimum Load Current
VIN = -4.25V 0.2 3.0 mA 1, 2, 3
VIN = -14.25V 0.2 3.0 mA 1, 2, 3
VIN = -41.25V 1.0 5.0 mA 1, 2, 3
VStart Voltage Start-up VIN = -4.25V, IL = 500mA -1.275 -1.225 V 1
-1.3 -1.2 V 2, 3
VOUT Output Voltage VIN = -6.25V, IL = 5mA (Note 9) -1.3 -1.2 V 2
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LM137QML
AC Parameters
The following conditions apply, unless otherwise specified.
(Note 14)
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
ΔVIN /
ΔVOUT
Ripple Rejection VIN = -6.25V, IL = 125mA,
eI = 1VRMS at 2400Hz 48 dB 9
VNO Output Noise Voltage VIN = -6.25V, IL = 50mA 120 µVRMS 9
ΔVOUT /
ΔVIN
Line Transient Response VIN = -6.25V, VPulse = -1V,
IL = 50mA 80 mV/V 9
ΔVO / Δ ILLoad Transient Response VIN = -6.25V, IL = 50mA,
Δ IL = 200mA (Note 10) 60 mV 9
DC Parameters Drift Values
The following conditions apply, unless otherwise specified.
(Note 14)
Delta calculations performed on QMLV devices at group B, subgroup 5 only.
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
VOUT Output Voltage
VIN = -4.25V, IL = 5mA -0.01 0.01 V 1
VIN = -4.25V, IL = 500mA -0.01 0.01 V 1
VIN = -41.25V, IL = 5mA -0.01 0.01 V 1
VIN = -41.25V, IL = 50mA -0.01 0.01 V 1
VR Line Line Regulation VIN = -41.25V to -4.25V, IL = 5mA -4.0 4.0 mV 1
IAdj Adjust Pin Current VIN = -4.25V, IL = 5mA -10 10 µA 1
VIN = -41.25V, IL = 5mA -10 10 µA 1
DC Parameters Post Radiation Limits +25°C 5962P9951701VXA
The following conditions apply, unless otherwise specified.
(Note 14)
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
Δ IAdj / VLine Adjust Pin Current Change vs.
Line Voltage
VIN = -41.25V to -4.25V,
IL = 5mA -20 20 µA 1
DC Parameters Post Radiation Limits +25°C 5962P9951708VXA
The following conditions apply, unless otherwise specified.
(Note 14)
Symbol Parameter Conditions Notes Min Max Units Sub-
groups
VOUT Output Voltage VIN = -41.25V, IL = 5mA -1.30 -1.225 V 1
VIN = -41.25V, IL = 50mA -1.30 -1.225 V 1
VR Line Line Regulation VIN = -41.25V to -4.25V,
IL = 5mA -9.0 +50 mV 1
IAdj Adjust Pin Current VIN = -41.25V, IL = 5mA 25 140 µA 1
Δ IAdj / VLine Adjust Pin Current Change vs.
Line Voltage
VIN = -41.25V to -4.25V,
IL = 5mA -70 +20 µA 1
VOUT
Recovery
Output Voltage Recovery After
Output Short Circuit Current
VIN = -4.25V -1.30 -1.225 V 1
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LM137QML
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (package
junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax = (TJmax - TA)/
θJA or the number given in the Absolute Maximum Ratings, whichever is lower.
Note 4: Group “A” sample only, test at all temps.
Note 5: Bench test, refer to (SG)RPI-3-362.
Note 6: Human body model, 100pF discharged through 1.5KΩ
Note 7: Guaranteed parameter, not tested.
Note 8: Test at +25°C, guaranteed but not tested at +125°C and −55°C
Note 9: Tested at +125°C ; correlated to +150°C
Note 10: Limit of 0.3mV/mA is equivalent to 60mV
Note 11: VIN = −41.3V at +125°C and −55°C
Note 12: −41.3V ≤ VIN ≤ −4.25V at +125°C and −55°C
Note 13: Pre Burn-In stress test per RPI-5-025.
Note 14: Pre and post irradiation limits are identical to those listed under AC and DC electrical characteristics except as listed in the Post Radiation Limits Table.
These parts may be dose rate sensitive in a space environment and demonstrate enhanced low dose rate effect. Radiation end point limits for the noted parameters
are guaranteed only for the conditions as specified in Mil-Std-883, Method 1019.5, Condition A.
Schematic Diagram
20122402
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LM137QML
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 espe-
cially severe since power dissipation is large. Thermal regu-
lation 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 inde-
pendent of electrical regulation or temperature coefficient,
and occurs within 5 ms to 50 ms after a change in power dis-
sipation. 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.
20122403
LM137, VOUT = −10V
VIN − VOUT = −40V
IIL = 0A → 0.25A → 0A
Vertical sensitivity, 5 mV/div
FIGURE 1.
In Figure 1, 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 as the
LM137 chip cools off. Note that the load regulation error of
about 8 mV (0.08%) is additional to the thermal regulation er-
ror. In Figure 2, 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).
20122404
LM137, VOUT = −10V
VIN − VOUT = −40V
IL = 0A → 0.25A → 0A
Horizontal sensitivity, 20 ms/div
FIGURE 2.
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LM137QML
Typical Applications
Adjustable Lab Voltage Regulator
20122409
Full output current not available
at high input-output voltages
*The 10 μF capacitors are optional to improve ripple rejection
Current Regulator
20122411
Negative Regulator with Protection Diodes
20122413
*When CL is 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
−5.2V Regulator with Electronic Shutdown*
20122410
*Minimum output ″ −1.3V when control input is low
Adjustable Current Regulator
20122412
High Stability −10V Regulator
20122414
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LM137QML
Typical Performance Characteristics (H & K Packages)
Load Regulation
20122416
Current Limit
20122417
Adjustment Current
20122418
Dropout Voltage
20122419
Temperature Stability
20122420
Minimum Operating Current
20122421
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LM137QML
Ripple Rejection
20122422
Ripple Rejection
20122423
Ripple Rejection
20122424
Output Impedance
20122425
Line Transient Response
20122426
Load Transient Response
20122427
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LM137QML
Revision History
Date Released Revision Section Changes
12/08/2010 A New Release, Corporate format
3 MDS data sheets converted into one Corp. data
sheet format. MNLM137-X, Rev. 0B1, MNLM137-
K Rev. 0A0, and MRLM137–X-RH Rev. 2A0. MDS
data sheets will be archived.
03/16/2012 B
Ordering Information, LM137K 883
Electrical Characteristics DC Parameters.,
LM137H RH Electrical Characteristics DC
Parameters., DC Parameters Post
Radiation Limits +25 Deg. C for 701VXA.,
DC Parameters Post Radiation Limits +25
Deg. C for 708VXA
Ordering Info — Added new LM137H1PQMLV.,
For the DC Parameters of LM137K 883 and
LM137 RH, widened columns to accommodate
correct limits. Added to the HEADER of DC
Parameters — Post Radiation Limits
5962P9951701VXA. Added the HEADER and
TABLE of DC Parameters — Post Radiation Limits
5962P9951708VXA. Rev A will be archived.
13 www.ti.com
LM137QML
Physical Dimensions inches (millimeters) unless otherwise noted
Metal Can Package (H)
NS Package Number H03A
Metal Can Package (K)
NS Package Number K02C
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LM137QML
Notes
15 www.ti.com
LM137QML
Notes
LM137QML 3-Terminal Adjustable Negative Regulators
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