LM120, LM320-N
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SNVS756C – APRIL 1998 – REVISED APRIL 2013
LM120/LM320-N Series 3-Terminal Negative Regulators
Check for Samples: LM120, LM320-N
FEATURES
1
•
•
•
•
2
•
•
•
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
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 need only one external component—a
compensation capacitor at the output, making them
easy to apply. Worst case specifications on output
voltage deviation due to any combination of line, load
or temperature variation assure satisfactory 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 prolonged overloads.
Although primarily intended for fixed output voltage
applications, the LM120 Series may be programmed
for higher output voltages with a simple resistive
divider. The low quiescent drain current of the
devices allows this technique to be used with good
regulation.
Table 1. LM120 Series Packages and Power
Capability
Device
LM120/LM320N
LM320-N
Package
Rated Power
Dissipation
Design
Load
Current
TO-3 (NDS)
20W
1.5A
TO (NDT)
2W
0.5A
TO-220 (NDE)
15W
1.5A
Typical Applications
Figure 1. Dual Trimmed Supply
*Required if regulator is separated from
filter capacitor by more than 3 inches. 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.
Figure 2. Fixed Regulator
1
2
Please 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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1998–2013, Texas Instruments Incorporated
LM120, LM320-N
SNVS756C – APRIL 1998 – REVISED APRIL 2013
www.ti.com
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−5 VOLT REGULATORS (1) (2) (3)
Power Dissipation
Internally Limited
−25V
Input Voltage
Input-Output Voltage Differential
25V
(4)
Junction Temperatures
−65°C to +150°C
Storage Temperature Range
Lead Temperature
(Soldering, 10 sec.)
300°C
Plastic
260°C
(1)
(2)
(3)
Refer to RETS120-5H drawing for LM120H-5.0 or RETS120-5K drawing for LM120-5K military specifications.
For −5V 3 amp regulators, see LM145 data sheet.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
(4)
LM120K-5.0 AND LM320K-5.0 ELECTRICAL CHARACTERISTICS (1)
Metal Can Package
Order Numbers
LM120K-5.0
(TO-3)
LM320K-5.0
(TO-3)
Design Output Current (ID)
Device Dissipation (PD)
Parameter
Output Voltage
Conditions
Units
1.5A
20W
(2)
TJ = 25°C, VIN =10V,
Min
Typ
Max
Min
Typ
Max
−5.1
−5
−4.9
−5.2
−5
−4.8
V
10
25
10
40
mV
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−25
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 10V,
(3)
54
−7
64
50
−25
54
75
−7
64
60
V
dB
100
mV
−4.75
V
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(2)
−7.5V ≤ VIN ≤ VMAX,
−5.20
−4.80
−5.25
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
5 mA ≤ ILOAD ≤ ID
Output Noise Voltage
TA = 25°C, CL = 1 μF, IL = 5 mA,
1
2
1
2
mA
0.1
0.4
0.1
0.4
mA
0.1
0.4
0.1
0.4
mA
150
μV
150
VIN = 10V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
5
50
5
50
mV
Thermal Resistance
(1)
(2)
(3)
2
Junction to Case
3
3
°C/W
Junction to Ambient
35
35
°C/W
For −5V 3 amp regulators, see LM145 data sheet.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
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Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM120 LM320-N
LM120, LM320-N
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SNVS756C – APRIL 1998 – REVISED APRIL 2013
LM120H-5.0 ELECTRICAL CHARACTERISTICS (1)
Metal Can Package
Order Numbers
LM120H-5.0
(TO)
Design Output Current (ID)
Device Dissipation (PD)
0.5A
2W
Parameter
Output Voltage
Conditions
(2)
Units
Min
Typ
Max
−5.1
−5
−4.9
V
10
25
mV
−7
V
50
mV
−4.80
V
1
2
mA
VMIN ≤ VIN ≤ VMAX
0.05
0.4
mA
5 mA ≤ ILOAD ≤ ID
0.04
0.4
mA
TJ = 25°C, VIN =10V,
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−25
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 10V,
(3)
54
64
30
dB
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(4)
−7.5V ≤ VIN ≤ VMAX,
−5.20
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
Output Noise Voltage
TA = 25°C, CL = 1 μF, IL = 5 mA,
150
μV
5
mV
VIN = 10V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
Thermal Resistance
(1)
(2)
(3)
(4)
(5)
Junction to Case
(5)
°C/W
Junction to Ambient
(5)
°C/W
For −5V 3 amp regulators, see LM145 data sheet.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Thermal resistance of typically 85°C/W (in 400 linear feet air flow), 224°C/W (in static air) junction to ambient, of typically 21°C/W
junction to case.
ABSOLUTE MAXIMUM RATINGS−12 VOLT REGULATORS (1) (2)
Power Dissipation
Internally Limited
−35V
Input Voltage
Input-Output Voltage Differential
30V
(3)
Junction Temperatures
−65°C to +150°C
Storage Temperature Range
Lead Temperature
(Soldering, 10 sec.)
(1)
(2)
(3)
300°C
Refer to RETS120H-12 drawing for LM120H-12 or RETS120-12K drawing for LM120K-12 military specifications.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM120 LM320-N
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LM120, LM320-N
SNVS756C – APRIL 1998 – REVISED APRIL 2013
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LM120K-12 ELECTRICAL CHARACTERISTICS
Metal Can Package
Order Numbers
LM120K-12
(TO-3)
Design Output Current (ID)
1A
Device Dissipation (PD)
Parameter
Output Voltage
Units
20W
Conditions
(1)
TJ = 25°C, VIN = 17V,
Min
Typ
Max
−12.3
−12
−11.7
V
4
10
mV
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−32
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 17V,
(2)
−14
56
80
V
dB
30
80
mV
−11.5
V
2
4
mA
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(3)
14.5V ≤ VIN ≤ VMAX,
−12.5
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
0.1
0.4
mA
5 mA ≤ ILOAD ≤ ID
0.1
0.4
mA
TA = 25°C, CL = 1 μF, IL = 5 mA,
400
Output Noise Voltage
μV
VIN = 17V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
12
120
mV
Junction to Case
3
°C/W
Junction to Ambient
35
°C/W
Thermal Resistance
(1)
(2)
(3)
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
LM120H-12 ELECTRICAL CHARACTERISTICS
Metal Can Package
Order Numbers
LM120H-12
(TO)
Design Output Current (ID)
0.2A
Device Dissipation (PD)
Parameter
Output Voltage
Conditions
Units
2W
(1)
TJ = 25°C, VIN = 17V,
Min
Typ
Max
−12.3
−12
−11.7
V
4
10
mV
−14
V
25
mV
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−32
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 17V,
(1)
4
56
80
10
dB
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM120 LM320-N
LM120, LM320-N
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SNVS756C – APRIL 1998 – REVISED APRIL 2013
LM120H-12 ELECTRICAL CHARACTERISTICS (continued)
Metal Can Package
Order Numbers
LM120H-12
(TO)
Design Output Current (ID)
0.2A
Device Dissipation (PD)
Parameter
(2)
Units
2W
Conditions
(1)
Min
Typ
Max
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(1)
14.5V ≤ VIN ≤ VMAX,
−12.5
−11.5
V
2
4
mA
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
0.05
0.4
mA
5 mA ≤ ILOAD ≤ ID
0.03
0.4
mA
TA = 25°C, CL = 1 μF, IL = 5 mA,
400
Output Noise Voltage
μV
VIN = 17V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
12
120
mV
Thermal Resistance
Junction to Case
(3)
°C/W
Junction to Ambient
(3)
°C/W
(2)
(3)
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
Thermal resistance of typically 85°C/W (in 400 linear feet/min air flow), 224°C/W (in static air) junction to ambient, of typically 21°C/W
junction to case.
LM320T-12 ELECTRICAL CHARACTERISTICS
Power Plastic Package
Order Numbers
LM320T-12
(TO-220)
Design Output Current (ID)
1A
Device Dissipation (PD)
Parameter
Output Voltage
Conditions
TJ = 25°C, VIN = 17V,
Units
15W
(1)
Min
Typ
Max
−12.4
−12
−11.6
V
4
20
mV
−14.5
V
80
mV
−11.4
V
2
4
mA
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−32
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 17V,
(2)
56
80
30
dB
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(1)
14.5V ≤ VIN ≤ VMAX,
−12.6
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
0.1
0.4
mA
5 mA ≤ ILOAD ≤ ID
0.1
0.4
mA
(1)
(2)
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM120 LM320-N
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LM120, LM320-N
SNVS756C – APRIL 1998 – REVISED APRIL 2013
www.ti.com
LM320T-12 ELECTRICAL CHARACTERISTICS (continued)
Power Plastic Package
Order Numbers
LM320T-12
(TO-220)
Design Output Current (ID)
1A
Device Dissipation (PD)
Parameter
Units
15W
Conditions
(1)
Min
Typ
TA = 25°C, CL = 1 μF, IL = 5 mA,
Max
400
μV
24
mV
Junction to Case
4
°C/W
Junction to Ambient
50
°C/W
Output Noise Voltage
VIN = 17V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
Thermal Resistance
ABSOLUTE MAXIMUM RATINGS−15 VOLT REGULATORS (1) (2)
Power Dissipation
Internally Limited
Input Voltage
LM120/LM320-N
−40V
LM320T
−35V
Input-Output Voltage Differential
30V
(3)
Junction Temperatures
−65°C to +150°C
Storage Temperature Range
Lead Temperature
(Soldering, 10 sec.)
(1)
(2)
(3)
300°C
Refer to RETS120-15H drawing for LM120H-15 or RETS120-15K drawing for LM120K-15 military specifications.
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
LM120K-15 AND LM320K-15 ELECTRICAL CHARACTERISTICS
Metal Can Package
Order Numbers
LM120K-15
(TO-3)
LM320K-15
(TO-3)
Design Output Current (ID)
Device Dissipation (PD)
Parameter
Output Voltage
Units
1A
20W
Conditions
TJ = 25°C, VIN = 20V,
(1)
Min
Typ
Max
Min
Typ
Max
−15.3
−15
−14.7
−15.4
−15
−14.6
V
5
10
5
20
mV
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−35
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 20V,
(2)
(1)
30
−35
56
80
−17
80
30
V
dB
80
mV
17.5V ≤ VIN ≤ VMAX,
−15.5
−14.5
−15.6
−14.4
V
4
mA
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
6
−17
80
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(1)
(2)
56
VMIN ≤ VIN ≤ VMAX
2
4
2
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM120 LM320-N
LM120, LM320-N
www.ti.com
SNVS756C – APRIL 1998 – REVISED APRIL 2013
LM120K-15 AND LM320K-15 ELECTRICAL CHARACTERISTICS (continued)
Metal Can Package
Order Numbers
LM120K-15
(TO-3)
LM320K-15
(TO-3)
Design Output Current (ID)
Device Dissipation (PD)
Parameter
20W
Conditions
(1)
Min
Typ
Max
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
0.1
5 mA ≤ ILOAD ≤ ID
0.1
TA = 25°C, CL = 1 μF, IL = 5 mA,
400
Output Noise Voltage
Units
1A
Min
Typ
Max
0.4
0.1
0.4
mA
0.4
0.1
0.4
mA
μV
400
VIN = 20V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
15
150
15
150
mV
Thermal Resistance
Junction to Case
3
3
°C/W
Junction to Ambient
35
35
°C/W
LM120H-15 ELECTRICAL CHARACTERISTICS
Metal Can Package
Order Numbers
LM120H-15
(TO)
Design Output Current (ID)
0.2A
Device Dissipation (PD)
Parameter
Output Voltage
Conditions
Units
2W
(1)
TJ = 25°C, VIN = 20V,
Min
Typ
Max
−15.3
−15
−14.7
V
5
10
mV
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−35
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 20V,
(2)
56
−17
V
80
10
dB
25
mV
−14.5
V
2
4
mA
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(1)
17.5V ≤ VIN ≤ VMAX,
−15.5
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
0.05
0.4
mA
5 mA ≤ ILOAD ≤ ID
0.03
0.4
mA
TA = 25°C, CL = 1 μF, IL = 5 mA,
400
Output Noise Voltage
μV
VIN = 20V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
15
150
mV
Thermal Resistance
(1)
(2)
(3)
Junction to Case
(3)
°C/W
Junction to Ambient
(3)
°C/W
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
Thermal resistance of typically 85°C/W (in 400 linear feet/min air flow), 224°C/W (in static air) junction to ambient, of typically 21°C/W
junction to case.
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM120 LM320-N
7
LM120, LM320-N
SNVS756C – APRIL 1998 – REVISED APRIL 2013
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LM320T-15 ELECTRICAL CHARACTERISTICS
Power Plastic Package
Order Numbers
LM320T-15
(TO-220)
Design Output Current (ID)
1A
Device Dissipation (PD)
Parameter
Output Voltage
Conditions
Units
15W
(1)
TJ = 25°C, VIN = 20V,
Min
Typ
Max
−15.5
−15
−14.5
V
5
20
mV
ILOAD = 5 mA
Line Regulation
TJ = 25°C, ILOAD = 5 mA,
VMIN ≤ VIN ≤ VMAX
−35
Input Voltage
Ripple Rejection
f = 120 Hz
Load Regulation,
TJ = 25°C, VIN = 20V,
(2)
56
−17.5
80
30
V
dB
80
mV
−14.3
V
2
4
mA
5 mA ≤ ILOAD ≤ ID
Output Voltage,
(1)
17.5V ≤ VIN ≤ VMAX,
−15.7
5 mA ≤ ILOAD ≤ ID, P ≤ PD
Quiescent Current
VMIN ≤ VIN ≤ VMAX
Quiescent Current
TJ = 25°C
Change
VMIN ≤ VIN ≤ VMAX
0.1
0.4
mA
5 mA ≤ ILOAD ≤ ID
0.1
0.4
mA
TA = 25°C, CL = 1 μF, IL = 5 mA,
400
μV
30
mV
Junction to Case
4
°C/W
Junction to Ambient
50
°C/W
Output Noise Voltage
VIN = 20V, 10 Hz ≤ f ≤ 100 kHz
Long Term Stability
Thermal Resistance
(1)
(2)
8
This specification applies over −55°C ≤ TJ ≤ +150°C for the LM120 and 0°C ≤ TJ ≤ +125°C for the LM320-N.
Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into account
separately. To ensure constant junction temperature, low duty cycle, pulse testing is used. The LM120/LM320-N series does have low
thermal feedback, improving line and load regulation. On all other tests, even though power dissipation is internally limited, electrical
specifications apply only up to PD.
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
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TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs
Temperature
Ripple Rejection
(All Types)
Figure 3.
Figure 4.
Output Impedance TO-3
and TO-220 Packages
Output Impedance TO-5
and TO-202 Packages
Figure 5.
Figure 6.
Minimum Input-Output
Differential TO-3 and
TO-220 Packages
Minimum Input-Output
Differential TO-5 and
TO-202 Packages
Figure 7.
Figure 8.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Quiescent Current vs
Input Voltage
Quiescent Current vs
Load Current
Figure 9.
Figure 10.
Maximum Average Power
Dissipation (TO-3)
Maximum Average Power
Dissipation (TO-5)
*These curves for LM120. Derate 25°C further for LM320-N.
Figure 11.
10
Figure 12.
Maximum Average Power
Dissipation (TO-202)
Maximum Average Power
Dissipation (TO-220)
Figure 13.
Figure 14.
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TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Short Circuit Current
Figure 15.
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TYPICAL APPLICATIONS
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.
Figure 16. High Stability 1 Amp Regulator
*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.
Figure 17. Wide Range Tracking Regulator
12
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Figure 18. Current Source
SELECT R2 AS FOLLOWS:
LM120-5
300Ω
LM120-12
750Ω
LM120-15
1k
*C3 optional. Improves transient response and ripple rejection.
Figure 19. Variable Output Current Source
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See Performance (Typical)
*Resistor tolerance of R4 and R5 determine matching of (+) and (−) outputs.
**Necessary only if raw supply filter capacitors are more than 2 inches from regulators.
Figure 20. ±15V, 1 Amp Tracking Regulators
Performance (Typical)
Load Regulation at ΔIL = 1A
Output Ripple, CIN = 3000 μF,
IL = 1A
Temperature Stability
Output Noise 10 Hz ≤ f ≤ 10 kHz
10 mV
1 mV
100 μVrms
100 μVrms
+50 mV
+50 mV
150 μVrms
150 μVrms
Light Controllers Using Silicon Photo Cells
*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 inches from LM320MP.
14
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*Lamp brightness increases until iI =iQ (1 mA) + 5V/R1.
†Necessary only if raw supply filter capacitor is more than 2 inches from LM320-N.
Connection Diagram
Figure 21. Steel Metal Can Package TO-3 (NDS)
(Bottom View)
Figure 22. Metal Can Package TO (NDT)
(Bottom View)
Figure 23. Power Package TO-220 (NDE)
(Front View)
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Schematic Diagrams
Figure 24. −5V
Figure 25. −12V and −15V
16
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REVISION HISTORY
Changes from Revision B (April 2013) to Revision C
•
Page
Changed layout of National Data Sheet to TI format .......................................................................................................... 16
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PACKAGE OPTION ADDENDUM
www.ti.com
30-Sep-2021
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
LM120H-12
ACTIVE
TO
NDT
3
500
RoHS & Green
AU
Level-1-NA-UNLIM
-55 to 150
( LM120H-12P+, LM1
20H-12P+)
LM120H-12/NOPB
ACTIVE
TO
NDT
3
500
RoHS & Green
AU
Level-1-NA-UNLIM
-55 to 150
( LM120H-12P+, LM1
20H-12P+)
LM120H-15
ACTIVE
TO
NDT
3
500
RoHS & Green
AU
Level-1-NA-UNLIM
-55 to 150
( LM120H-15P+, LM1
20H-15P+)
LM120H-15/NOPB
ACTIVE
TO
NDT
3
500
RoHS & Green
AU
Level-1-NA-UNLIM
-55 to 150
( LM120H-15P+, LM1
20H-15P+)
LM120H-5.0
ACTIVE
TO
NDT
3
500
RoHS & Green
AU
Level-1-NA-UNLIM
-55 to 150
( LM120H-5.0P+, LM
120H-5.0P+)
LM120H-5.0/NOPB
ACTIVE
TO
NDT
3
500
RoHS & Green
AU
Level-1-NA-UNLIM
-55 to 150
( LM120H-5.0P+, LM
120H-5.0P+)
LM320T-15
NRND
TO-220
NDE
3
45
Non-RoHS
& Green
Call TI
Level-1-NA-UNLIM
0 to 125
LM320T
-15 P+
LM320T-15/NOPB
ACTIVE
TO-220
NDE
3
45
RoHS & Green
SN
Level-1-NA-UNLIM
0 to 125
LM320T
-15 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)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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