LM120QML
LM120QML Series 3-Terminal Negative Regulators
Literature Number: SNVS368
LM120QML
December 16, 2010
Series 3-Terminal Negative Regulators
General Description
The LM120 series are three-terminal negative regulators with
a fixed output voltage of −5V, −12V, and −15V, and up to 1.5A
load current capability. Where other voltages are required, the
LM137 and LM137HV series provide an output voltage range
of −1.2V to −47V.
The LM120 needs only one external component—a compen-
sation capacitor at the output, making them easy to apply.
Worst case guarantees on output voltage deviation due to any
combination of line, load or temperature variation assure sat-
isfactory system operation.
Exceptional effort has been made to make the LM120 Series
immune to overload conditions. The regulators have current
limiting which is independent of temperature, combined with
thermal overload protection. Internal current limiting protects
against momentary faults while thermal shutdown prevents
junction temperatures from exceeding safe limits during pro-
longed overloads.
Although primarily intended for fixed output voltage applica-
tions, the LM120 Series may be programmed for higher out-
put voltages with a simple resistive divider. The low quiescent
drain current of the devices allows this technique to be used
with good regulation.
Features
Preset output voltage error less than ±3%
Preset current limit
Internal thermal shutdown
Operates with input-output voltage differential down to 1V
Excellent ripple rejection
Low temperature drift
Easily adjustable to higher output voltage
LM120 Series Packages and Power Capability
Rated Design
Package Power Load
Dissipation Current
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
LM120H-5.0/883 H03A 3LD T0–39 Metal Can
LM120H-12/883 H03A 3LD T0–39 Metal Can
LM120H-15/883 H03A 3LD T0–39 Metal Can
LM120K-12/883 K02C 2LD T0–3 Metal Can
LM120K-15/883 K02C 2LD T0–3 Metal Can
LM120KG–5 MD8 (Note 1) Bare Die
LM120KG–12 MD8 (Note 1) Bare Die
LM120KG–15 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
Connection Diagrams
20150114
Bottom View
Steel Metal Can Package TO-3 (K)
See NS Package Number K02C
20150113
Bottom View
Metal Can Package TO-39 (H)
See NS Package Number H03A
© 2010 National Semiconductor Corporation 201501 www.national.com
LM120QML Series 3-Terminal Negative Regulators
Schematic Diagrams
−5V
20150118
−12V and −15V
20150119
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LM120QML
Absolute Maximum Ratings (Note 2)
LM120−5 LM120−12 LM120−15
Power Dissipation Internally Limited
Input Voltage −25V −35V −40V
Input-Output Voltage Differential 25V 30V 30V
Junction Temperatures 150°C
Storage Temperature Range −65°C TA +150°C
Operating Temperature Range −55°C TA +125°C
Lead Temperature (Soldering, 10 sec.) 300°C
Thermal Resistance
  θJA
H-Pkg (Still Air @ 0.5W) 191°C/W
H-Pkg (500LF/Min Air flow @ 0.5W) 70°C/W
K-Pkg (Still Air @ 0.5W) 35°C/W
K-Pkg (500LF/Min Air flow @ 0.5W) TBD
  θJC
H-Pkg 29°C/W
K-Pkg 3°C/W
ESD Tolerance (Note 4) 4000V
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
12 Settling time at +25
13 Settling time at +125
14 Settling time at -55
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LM120QML
LM120H-5.0
DC Parameters
The following conditions apply, unless otherwise specified. VIN = −10V, IL = 5mA
Symbol Parameter Conditions Notes Min Max Unit Sub-
groups
IQQuiescent Current VIN = -7V 2.0 mA 1, 2, 3
VIN = -25V 2.0 mA 1, 2, 3
ΔIQQuiescent Current Change
5mA IL 0.5A -0.4 0.4 mA 1
-0.5 0.5 mA 2, 3
-25V VIN -7V -0.4 0.4 mA 1
-0.5 0.5 mA 2, 3
VOUT Output Voltage
-5.1 -4.9 V 1
VIN = -7.5V -5.2 -4.8 V 1, 2, 3
VIN = -7.5V, IL = 0.5A -5.2 -4.8 V 1, 2, 3
VIN = -25V -5.2 -4.8 V 1, 2, 3
VIN = -25V, IL = 100mA -5.2 -4.8 V 1, 2, 3
RLine Line Regulation -25V VIN -7V -25 25 mV 1
-50 50 mV 2, 3
RLoad Load Regulation 5mA IL 0.5A -50 50 mV 1
-100 100 mV 2, 3
IOS Short Circuit Current VIN = -25V 0.1 1.5 A 1
RR Ripple Rejection ƒ = 120Hz, IL = 125mA, eI = 1VRMS 54 dB 4
LM120K-5.0
DC Parameters
The following conditions apply, unless otherwise specified. VIN = −10V, IL = 5mA
Symbol Parameter Conditions Notes Min Max Unit Sub-
groups
IQQuiescent Current VIN = -7V 2.0 mA 1, 2, 3
VIN = -25V 2.0 mA 1, 2, 3
ΔIQQuiescent Current Change
5mA IL 1.5A -0.4 0.4 mA 1
-0.5 0.5 mA 2, 3
-25V VIN -7V -0.4 0.4 mA 1
-0.5 0.5 mA 2, 3
VOUT Output Voltage
-5.1 -4.9 V 1
VIN = -7.5V -5.2 -4.8 V 1, 2, 3
VIN = -7.5V, IL = 1.5A -5.2 -4.8 V 1, 2, 3
VIN = -25V -5.2 -4.8 V 1, 2, 3
VIN = -25V, IL = 1A -5.2 -4.8 V 1, 2, 3
RLine Line Regulation -25V VIN -7V -25 25 mV 1
-50 50 mV 2, 3
RLoad Load Regulation 5mA IL 1.5A -75 75 mV 1
-100 100 mV 2, 3
IOS Short Circuit Current VIN = -25V 0.4 3.0 A 1
RR Ripple Rejection ƒ = 120Hz, IL = 350mA, eI = 1VRMS 54 dB 4
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LM120QML
LM120H-12
DC Parameters
The following conditions apply, unless otherwise specified. VIN = −17V, IL = 5mA
Symbol Parameter Conditions Notes Min Max Unit Sub-
groups
IQQuiescent Current VIN = -14V 4.0 mA 1, 2, 3
VIN = -32V 4.0 mA 1, 2, 3
ΔIQQuiescent Current Change
VIN = -17V,
5mA IL 200mA
0.4 mA 1
0.5 mA 2, 3
-32V VIN -14V 0.4 mA 1
0.5 mA 2, 3
RLoad Load Regulation VIN = -17V, 5mA IL 200mA -25 25 mV 1
-50 50 2, 3
RLine Line Regulation -32V VIN -14V -10 10 mV 1
-20 20 mV 2, 3
IOS Short Circuit Current VIN = -32V 0.1 1.5 A 1
VOUT Output Voltage
VIN = -17V -12.3 -11.7 V 1
VIN = -32V -12.5 -11.5 V 1, 2, 3
VIN = -32V, IL = 100mA -12.5 -11.5 V 1, 2, 3
VIN = -14.5V -12.5 -11.5 V 1, 2, 3
VIN = -14.5V, IL = 200mA -12.5 -11.5 V 1, 2, 3
RR Ripple Rejection ƒ = 120Hz, IL = 125mA, ei = 1VRMS 56 dB 4
LM120K-12
DC Parameters
The following conditions apply to all the following parameters, unless otherwise specified. VIN = −17V, IL = 5mA
Symbol Parameter Conditions Notes Min Max Unit Sub-
groups
IQQuiescent Current VIN = -14V 4.0 mA 1, 2, 3
VIN = -32V 4.0 mA 1, 2, 3
ΔIQQuiescent Current Change
VIN = -17V, 5mA IL 1A 0.4 mA 1
0.5 mA 2, 3
-32V VIN -14V 0.4 mA 1
0.5 mA 2, 3
RLoad Load Regulation VIN = -17V, 5mA IL 1A -80 80 mV 1, 2, 3
RLine Line Regulation -32V VIN -14V -10 10 mV 1
-20 20 mV 2, 3
IOS Short Circuit Current VIN = -32V 0.4 3.0 A 1
VOUT Output Voltage
VIN = -17V -12.3 -11.7 V 1
VIN = -32V -12.5 -11.5 V 1, 2, 3
VIN = -32V, IL = 1A -12.5 -11.5 V 1, 2, 3
VIN = -14.5V -12.5 -11.5 V 1, 2, 3
VIN = -14.5V, IL = 1A -12.5 -11.5 V 1, 2, 3
RR Ripple Rejection ƒ = 120Hz, IL = 350mA, ei = 1VRMS 56 dB 4
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LM120QML
LM120H-15
DC Parameters
The following conditions apply to all the following parameters, unless otherwise specified. VIN = 20V, IL = 5mA
Symbol Parameter Conditions Notes Min Max Unit Sub-
groups
IQQuiescent Current VIN = -17V 4.0 mA 1, 2, 3
VIN = -35V 4.0 mA 1, 2, 3
ΔIQQuiescent Current Change
VIN = -17V,
5mA IL 200mA
0.4 mA 1
0.5 mA 2, 3
-35V VIN -17V 0.4 mA 1
0.5 mA 2, 3
RLoad Load Regulation VIN = -20V,
5mA IL 200mA
-25 25 mV 1
−50 50 mV 2, 3
RLine Line Regulation -35V VIN -17V -10 10 mV 1
-20 20 mV 2, 3
IOS Short Circuit Current VIN = -35V 0.1 1.5 A 1
VOUT Output Voltage
VIN = -20V -15.3 -14.7 V 1
VIN = -35V -15.5 -14.5 V 1, 2, 3
VIN = -35V, IL = 100mA -15.5 -14.5 V 1, 2, 3
VIN = -17.5V -15.5 -14.5 V 1, 2, 3
VIN = -17.5V, IL = 200mA -15.5 -14.5 V 1, 2, 3
RR Ripple Rejection ƒ = 120Hz, IL = 125mA, ei = 1VRMS 56 dB 4
LM120K-15
DC Parameters
The following conditions apply, unless otherwise specified. VIN = 20V, IL = 5mA
Symbol Parameter Conditions Notes Min Max Unit Sub-
groups
IQQuiescent Current VIN = -17V 4.0 mA 1, 2, 3
VIN = -35V 4.0 mA 1, 2, 3
ΔIQQuiescent Current Change
VIN = -17V,
5mA IL 1A
0.4 mA 1
0.5 mA 2, 3
-35V VIN -17V 0.4 mA 1
0.5 mA 2, 3
RLoad Load Regulation VIN = -20V,
5mA IL 1A
-80 80 mV 1, 2, 3
RLine Line Regulation -35V VIN -17V -10 10 mV 1
-20 20 mV 2, 3
IOS Short Circuit Current VIN = -35V 0.4 3.0 A 1
VOUT Output Voltage
VIN = -20V -15.3 -14.7 V 1
VIN = -35V -15.5 -14.5 V 1, 2, 3
VIN = -35V, IL = 1A -15.5 -14.5 V 1, 2, 3
VIN = -17.5V -15.5 -14.5 V 1, 2, 3
VIN = -17.5V, IL = 1.5A -15.5 -14.5 V 1, 2, 3
ΔVO / ΔtLong Term Stability (Note 3) 150 mV 1
RR Ripple Rejection ƒ = 120Hz, IL = 350mA, eI = 1VRMS 56 dB 4
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LM120QML
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: Guaranteed parameter, not tested
Note 4: Human body model, 1.5 k in seriew with 100 pF.
Typical Performance Characteristics
Output Voltage vs
Temperature
20150120
Ripple Rejection
(All Types)
20150121
Output Impedance TO-3
20150122
Output Impedance TO-5
20150123
Minimum Input-Output
Differential TO-3
20150124
Minimum Input-Output
Differential TO-5
20150125
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LM120QML
Quiescent Current vs
Input Voltage
20150126
Quiescent Current vs
Load Current
20150127
Maximum Average Power
Dissipation (TO-3)
20150128
*These curves for LM120. Derate 25°C further for LM320.
Maximum Average Power
Dissipation (TO-5)
20150129
Short Circuit Current
20150132
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LM120QML
Typical Applications
High Stability 1 Amp Regulator
20150106
Lead and line regulation — 0.01% temperature stability — 0.2%
†Determines Zener current.
††Solid tantalum.
An LM120-12 or LM120-15 may be used to permit higher input voltages, but the regulated output voltage must be at least −15V when using the LM120-12 and
−18V for the LM120-15.
**Select resistors to set output voltage. 2 ppm/°C tracking suggested.
Wide Range Tracking Regulator
20150107
* Resistor tolerance of R1 and R2 determine matching of (+) and (−) inputs.
**Necessary only if raw supply capacitors are more than 3″ from regulators
An LM3086N array may substitute for Q1, D1 and D2 for better stability and
tracking. In the array diode transistors Q5 and Q4 (in parallel) make up D2;
similarly, Q1 and Q2 become D1 and Q3 replaces the 2N2222.
Current Source
20150108
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LM120QML
Variable Output
20150109
*Optional. Improves transient response and ripple rejection.
SELECT R2 AS FOLLOWS:
LM120-5  −300Ω
LM120-12  −750Ω
LM120-15 −1k
Light Controllers Using Silicon Photo Cells
20150110
*Lamp brightness increases until iI = 5V/R1 (iI can be set as low as 1 μA).
Necessary only if raw supply filter capacitor is more than 2″ from LM320MP.
20150111
*Lamp brightness increases until iI =iQ (1 mA) + 5V/R1.
†Necessary only if raw supply filter capacitor is more than 2″ from LM320.
Dual Trimmed Supply
20150103
Fixed Regulator
20150102
*Required if regulator is separated from filter capacitor by more than 3″. For
value given, capacitor must be solid tantalum. 25 μF aluminum electrolytic
may be substituted.
Required for stability. For value given, capacitor must be solid tantalum. 25
μF aluminum electrolytic may be substituted. Values given may be increased
without limit.
For output capacitance in excess of 100 μF, a high current diode from input
to output (1N4001, etc.) will protect the regulator from momentary input
shorts.
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LM120QML
±15V, 1 Amp Tracking Regulators
20150112
Performance (Typical)
Load Regulation at ΔIL = 1A 10 mV 1 mV
Output Ripple, CIN = 3000 μF,
IL = 1A
100 μVRMS 100 μVRMS
Temperature Stability +50 mV +50 mV
Output Noise 10 Hz f 10 kHz 150 μVRMS 150 μVRMS
*Resistor tolerance of R4 and R5 determine matching of (+) and (−) outputs.
**Necessary only if raw supply filter capacitors are more than 2″ from
regulators.
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LM120QML
Revision History
Date Released Revision Section Changes
12/15/2010 A New release to the corporate format 6 MDS datasheets were converted and merged into
one datasheet compliant to corporate format. Drift
endpoints removed since note used on 883 product.
MDS MNLM120-5.0-K Rev OBL, MNLM120-5.0-H
Rev 0BL, MNLM120-12-K Rev OBL, MNLM120-12-
H Rev 0BL, MNLM120-15-K Rev OBL, &
MNLM120-15-H Rev 0BL will be archived.
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LM120QML
Physical Dimensions inches (millimeters) unless otherwise noted
Metal Can Package (TO-39) (H)
NS Package Number H03A
Steel Metal Can Package TO-3 (K)
NS Package Number K02C
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LM120QML
Notes
LM120QML Series 3-Terminal Negative Regulators
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