NSC LM340A Series 3-terminal positive regulator Datasheet

LM140/LM340A/LM340/LM7800C
Series 3-Terminal Positive Regulators
General Description
Features
The LM140/LM340A/LM340/LM7800C monolithic 3-terminal
positive voltage regulators employ internal current-limiting,
thermal shutdown and safe-area compensation, making
them essentially indestructible. If adequate heat sinking is
provided, they can deliver over 1.0A output current. They are
intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of
noise and distribution problems associated with single-point
regulation. In addition to use as fixed voltage regulators,
these devices can be used with external components to obtain adjustable output voltages and currents.
Considerable effort was expended to make the entire series
of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter
capacitor of the power supply.
The 5V, 12V, and 15V regulator options are available in the
steel TO-3 power package. The LM340A/LM340/LM7800C
series is available in the TO-220 plastic power package, and
the LM340-5.0 is available in the SOT-223 package, as well
as the LM340-5.0 and LM340-12 in the surface-mount
TO-263 package.
n Complete specifications at 1A load
n Output voltage tolerances of ± 2% at Tj = 25˚C and ± 4%
over the temperature range (LM140A/LM340A)
n Line regulation of 0.01% of VOUT/V of ∆VIN at 1A load
(LM140A/LM340A)
n Load regulation of 0.3% of VOUT/A (LM140A/LM340A)
n Internal thermal overload protection
n Internal short-circuit current limit
n Output transistor safe area protection
n P+ Product Enhancement tested
Output
Voltages
Device
Packages
LM140
5, 12,
15
TO-3 (K)
LM340A/LM340
5, 12,
15
TO-3 (K), TO-220 (T),
SOT-223 (MP), TO-263 (S)
(5V and 12V only)
LM7800C
5, 8, 12,
15
TO-220 (T)
Typical Applications
Fixed Output Regulator
Adjustable Output Regulator
DS007781-1
*Required if the regulator is located far from the power supply filter.
**Although no output capacitor is needed for stability, it does help transient
response. (If needed, use 0.1 µF, ceramic disc).
DS007781-2
VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 > 3 IQ,
load regulation (Lr) ≈ [(R1 + R2)/R1] (Lr of LM340-5).
Current Regulator
Comparison between SOT-223 and D-Pak (TO-252)
Packages
DS007781-3
∆IQ = 1.3 mA over line and load changes.
DS007781-38
Scale 1:1
© 1999 National Semiconductor Corporation
DS007781
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LM140/LM340A/LM340/LM7800C Series 3-Terminal Positive Regulators
May 1999
Absolute Maximum Ratings (Note 1)
Lead Temperature (Soldering, 10 sec.)
TO-3 Package (K)
TO-220 Package (T), TO-263
Package (S)
ESD Susceptibility (Note 3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 5)
DC Input Voltage
All Devices except
LM7824/LM7824C
LM7824/LM7824C
Internal Power Dissipation (Note 2)
Maximum Junction Temperature
Storage Temperature Range
300˚C
230˚C
2 kV
Operating Conditions (Note 1)
35V
40V
Internally Limited
150˚C
−65˚C to +150˚C
Temperature Range (TA) (Note 2)
LM140A, LM140
LM340A, LM340, LM7805C,
LM7812C, LM7815C, LM7808C
−55˚C to +125˚C
0˚C to +125˚C
LM340A
Electrical Characteristics
IOUT = 1A, −55˚C ≤ TJ≤+150˚C (LM140A), or 0˚C ≤ TJ≤+ 125˚C (LM340A) unless otherwise specified (Note 4)
Symbol
Output Voltage
5V
12V
15V
Input Voltage (unless otherwise noted)
10V
19V
23V
Parameter
VO
∆VO
Output Voltage
Line Regulation
Conditions
Min
Typ Max
Min
Typ
5.1 11.75
12 12.25
14.7
15
12.5
14.4
Units
Max
4.9
PD ≤ 15W, 5 mA ≤ IO ≤ 1A
4.8
VMIN ≤ VIN ≤ VMAX
(7.5 ≤ VIN ≤ 20)
(14.8 ≤ VIN ≤ 27)
(17.9 ≤ VIN ≤ 30)
10
18
22
(7.5 ≤ VIN ≤ 20)
(14.8 ≤ VIN ≤ 27)
(17.9 ≤ VIN ≤ 30)
V
3
4
4
mV
5
5.2
IO = 500 mA
∆VIN
15.3
V
15.6
V
22
(17.5 ≤ VIN ≤ 30)
9
12
∆VIN
18
(14.5 ≤ VIN ≤ 27)
4
Over Temperature
TJ = 25˚C
11.5
10
(7.5 ≤ VIN ≤ 20)
∆VIN
TJ = 25˚C
Load Regulation
Typ Max
TJ = 25˚C
TJ = 25˚C
∆VO
Min
30
V
mV
V
10
mV
30
mV
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
(20 ≤ VIN ≤ 26)
V
10
12
12
mV
5 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
Over Temperature,
25
32
35
15
19
21
mV
25
60
75
mV
mA
5 mA ≤ IO ≤ 1A
IQ
∆IQ
Quiescent Current
TJ = 25˚C
6
6
6
Over Temperature
6.5
6.5
6.5
mA
Quiescent Current
5 mA ≤ IO ≤ 1A
0.5
0.5
0.5
mA
Change
TJ = 25˚C, IO = 1A
0.8
mA
VMIN ≤ VIN ≤ VMAX
0.8
0.8
(7.5 ≤ VIN ≤ 20)
(14.8 ≤ VIN ≤ 27)
0.8
0.8
IO = 500 mA
VMIN ≤ VIN ≤ VMAX
VN
Output Noise Voltage
Ripple Rejection
(17.9 ≤ VIN ≤ 30)
0.8
V
mA
(8 ≤ VIN ≤ 25)
(15 ≤ VIN ≤ 30)
(17.9 ≤ VIN ≤ 30)
V
40
75
90
µV
TA = 25˚C, 10 Hz ≤ f ≤ 100 kHz
TJ = 25˚C, f = 120 Hz, IO = 1A
68
or f = 120 Hz, IO = 500 mA,
68
80
61
72
61
60
70
60
dB
dB
Over Temperature,
RO
VIN
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤ 28.5)
Dropout Voltage
TJ = 25˚C, IO = 1A
2.0
2.0
2.0
V
Output Resistance
f = 1 kHz
8
18
19
mΩ
Short-Circuit Current
TJ = 25˚C
2.1
1.5
1.2
A
Peak Output Current
TJ = 25˚C
2.4
2.4
2.4
A
Average TC of VO
Min, TJ = 0˚C, IO = 5 mA
−0.6
−1.5
−1.8
mV/˚C
Input Voltage
TJ = 25˚C
Required to Maintain
7.5
Line Regulation
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2
14.5
17.5
V
V
LM140
Electrical Characteristics (Note 4)
−55˚C ≤ TJ ≤ +150˚C unless otherwise specified
Symbol
Output Voltage
5V
12V
15V
Input Voltage (unless otherwise noted)
10V
19V
23V
Parameter
VO
Output Voltage
Conditions
Min
Typ
TJ = 25˚C, 5 mA ≤ IO ≤ 1A
4.8
5
PD ≤ 15W, 5 mA ≤ IO ≤ 1A
4.75
VMIN ≤ VIN ≤ VMAX
∆VO
Line Regulation
IO = 500 mA
∆VIN
TJ = 25˚C
Typ
12.5
14.4
15
12.6
14.25
Units
Max
15.6
V
15.75
V
(18.5 ≤ VIN ≤ 30)
V
4
4
mV
50
120
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN ≤ 30)
50
120
TJ = 25˚C
∆VIN
12
Min
(15.5 ≤ VIN ≤ 27)
(15 ≤ VIN ≤ 27)
150
(17.5 ≤ VIN ≤ 30)
150
(18.5 ≤ VIN ≤ 30)
50
120
(7.5 ≤ VIN ≤ 20)
(14.6 ≤ VIN ≤ 27)
(17.7 ≤ VIN ≤ 30)
25
60
75
−55˚C ≤ TJ ≤ +150˚C
Load Regulation
11.5
11.4
(8 ≤ VIN ≤ 20)
∆VIN
∆VO
5.2
5.25
Typ Max
3
−55˚C ≤ TJ ≤ +150˚C
IO ≤ 1A
Min
(8 ≤ VIN ≤ 20)
TJ = 25˚C
∆VIN
Max
150
V
mV
V
mV
V
mV
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
(20 ≤ VIN ≤ 26)
V
10
12
12
150
mV
5 mA ≤ IO ≤ 1.5A
250 mA ≤ IP ≤ 750 mA
−55˚C ≤ TJ ≤ +150˚C,
50
120
25
60
75
mV
50
120
150
mV
5 mA ≤ IO ≤ 1A
IQ
∆IQ
Quiescent Current
IO ≤ 1A
TJ = 25˚C
6
6
6
mA
−55˚C ≤ TJ ≤ +150˚C
7
7
7
mA
Quiescent Current
5 mA ≤ IO ≤ 1A
0.5
0.5
0.5
mA
Change
TJ = 25˚C, IO ≤ 1A
0.8
0.8
0.8
mA
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 20)
IO = 500 mA, −55˚C ≤ TJ ≤ +150˚C
VMIN ≤ VIN ≤ VMAX
VN
Output Noise Voltage
f = 120 Hz
(18.5 ≤ VIN ≤ 30)
0.8
0.8
V
mA
(8 ≤ VIN ≤ 25)
(15 ≤ VIN ≤ 30)
(18.5 ≤ VIN ≤ 30)
V
40
75
90
µV
70
dB
TA = 25˚C, 10 Hz ≤ f ≤ 100 kHz
Ripple Rejection
(15 ≤ VIN ≤ 27)
0.8
IO ≤ 1A, TJ = 25˚C or
68
IO ≤ 500 mA,
68
80
61
72
61
60
60
dB
−55˚C ≤ TJ ≤+150˚C
RO
VIN
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤ 28.5)
Dropout Voltage
TJ = 25˚C, IO = 1A
2.0
2.0
2.0
V
Output Resistance
f = 1 kHz
8
18
19
mΩ
Short-Circuit Current
TJ = 25˚C
2.1
1.5
1.2
A
Peak Output Current
TJ = 25˚C
2.4
2.4
2.4
A
Average TC of VOUT
0˚C ≤ TJ ≤ +150˚C, IO = 5 mA
−0.6
−1.5
−1.8
mV/˚C
Input Voltage
TJ = 25˚C, IO ≤ 1A
Required to Maintain
7.5
14.6
17.7
V
V
Line Regulation
3
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LM340/LM7800C
Electrical Characteristics (Note 4)
0˚C ≤ TJ ≤ +125˚C unless otherwise specified
Symbol
Output Voltage
5V
12V
15V
Input Voltage (unless otherwise noted)
10V
19V
23V
Parameter
VO
Output Voltage
Conditions
Min
Typ
TJ = 25˚C, 5 mA ≤ IO ≤ 1A
4.8
5
PD ≤ 15W, 5 mA ≤ IO ≤ 1A
4.75
VMIN ≤ VIN ≤ VMAX
∆VO
Line Regulation
IO = 500 mA
15.6
V
15.75
V
V
mV
(7.5 ≤ VIN ≤ 20)
120
150
(14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN ≤ 30)
120
150
(15 ≤ VIN ≤ 27)
50
(18.5 ≤ VIN ≤ 30)
120
150
(14.6 ≤ VIN ≤ 27)
(17.7 ≤ VIN ≤ 30)
60
75
25
V
mV
V
mV
V
mV
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
(20 ≤ VIN ≤ 26)
V
10
12
12
mV
5 mA ≤ IO ≤ 1.5A
TJ = 25˚C
0˚C ≤ TJ ≤ +125˚C
50
120
150
25
60
75
mV
50
120
150
mV
8
8
8
mA
8.5
8.5
8.5
mA
Quiescent Current
5 mA ≤ IO ≤ 1A
0.5
0.5
0.5
mA
Change
TJ = 25˚C, IO ≤ 1A
1.0
1.0
1.0
mA
(14.8 ≤ VIN ≤ 27)
(17.9 ≤ VIN ≤ 30)
1.0
1.0
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN ≤ 30)
V
40
75
90
µV
70
dB
VMIN ≤ VIN ≤ VMAX
(7.5 ≤ VIN ≤ 20)
IO ≤ 500 mA, 0˚C ≤ TJ ≤ +125˚C
1.0
VMIN ≤ VIN ≤ VMAX
VN
15
4
250 mA ≤ IO ≤ 750 mA
∆IQ
14.4
12.6 14.25
(17.5 ≤ VIN ≤ 30)
5 mA ≤ IO ≤ 1A, 0˚C ≤ TJ ≤ +125˚C
IO ≤ 1A
12.5
Units
Max
4
50
(8 ≤ VIN ≤ 20)
∆VIN
Quiescent Current
12
Typ
(14.5 ≤ VIN ≤ 27)
TJ = 25˚C
∆VIN
IQ
11.4
Min
3
0˚C ≤ TJ ≤ +125˚C
TJ = 25˚C
11.5
Typ Max
50
∆VIN
Load Regulation
5.2
5.25
(7 ≤ VIN ≤ 25)
∆VIN
∆VO
Min
(7.5 ≤ VIN ≤ 20)
TJ = 25˚C
0˚C ≤ TJ ≤ +125˚C
IO ≤ 1A
Max
Output Noise Voltage
TA = 25˚C, 10 Hz ≤ f ≤ 100 kHz
Ripple Rejection
f = 120 Hz
IO ≤ 1A, TJ = 25˚C
62
or IO ≤ 500 mA,
62
80
55
72
55
54
54
V
mA
dB
0˚C ≤ TJ ≤ +125˚C
RO
VIN
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤
28.5)
Dropout Voltage
TJ = 25˚C, IO = 1A
2.0
2.0
2.0
V
Output Resistance
f = 1 kHz
8
18
19
mΩ
A
V
Short-Circuit Current
TJ = 25˚C
2.1
1.5
1.2
Peak Output Current
TJ = 25˚C
2.4
2.4
2.4
A
Average TC of VOUT
0˚C ≤ TJ ≤ +125˚C, IO = 5 mA
−0.6
−1.5
−1.8
mV/˚C
Input Voltage
TJ = 25˚C, IO ≤ 1A
Required to Maintain
7.5
14.6
17.7
V
Line Regulation
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions
but the specifications might not be guaranteed. For guaranteed specifications and test conditions see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation at any ambient temperature is a function of the maximum junction temperature for operation (TJMAX = 125˚C or
150˚C), the junction-to-ambient thermal resistance (θJA), and the ambient temperature (TA). PDMAX = (TJMAX − TA)/θJA. If this dissipation is exceeded, the die temperature will rise above TJMAX and the electrical specifications do not apply. If the die temperature rises above 150˚C, the device will go into thermal shutdown. For
the TO-3 package (K, KC), the junction-to-ambient thermal resistance (θJA) is 39˚C/W. When using a heatsink, θJA is the sum of the 4˚C/W junction-to-case thermal
resistance (θJC) of the TO-3 package and the case-to-ambient thermal resistance of the heatsink. For the TO-220 package (T), θJA is 54˚C/W and θJC is 4˚C/W. If
SOT-223 is used, the junction-to-ambient thermal resistance is 174˚C/W and can be reduced by a heatsink (see Applications Hints on heatsinking).
If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package: Using 0.5 square
inches of copper area, θJA is 50˚C/W; with 1 square inch of copper area, θJAis 37˚C/W; and with 1.6 or more inches of copper area, θJA is 32˚C/W.
Note 3: ESD rating is based on the human body model, 100 pF discharged through 1.5 kΩ.
Note 4: All characteristics are measured with a 0.22 µF capacitor from input to ground and a 0.1 µF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
Note 5: A military RETS specification is available on request. At the time of printing, the military RETS specifications for the LM140AK-5.0/883, LM140AK-12/883,
and LM140AK-15/883 complied with the min and max limits for the respective versions of the LM140A. At the time of printing, the military RETS specifications for
the LM140K-5.0/883, LM140K-12/883, and LM140K-15/883 complied with the min and max limits for the respective versions of the LM140. The LM140H/883,
LM140K/883, and LM140AK/883 may also be procured as a Standard Military Drawing.
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4
LM7808C
Electrical Characteristics
0˚C ≤ TJ ≤ +150˚C, VI = 14V, IO = 500 mA, CI = 0.33 µF, CO = 0.1 µF, unless otherwise specified
Symbol
Parameter
Conditions (Note 6)
LM7808C
Min
VO
Output Voltage
∆VO
Line Regulation
TJ = 25˚C
TJ = 25˚C
∆VO
Load Regulation
TJ = 25˚C
Output Voltage
IQ
Quiescent
Current
∆IQ
Quiescent
With Line
Current Change
With
Load
Noise
∆VI/∆VO
Ripple Rejection
8.0
8.3
V
6.0
160
mV
11.0V ≤ VI ≤ 17V
2.0
80
5.0 mA ≤ IO ≤ 1.5A
12
160
250 mA ≤ IO ≤ 750
mA
4.0
80
VDO
Dropout Voltage
Output Resistance
V
8.0
mA
11.5V ≤ VI ≤ 25V
1.0
mA
5.0 mA ≤ IO ≤ 1.0A
0.5
IOS
Output Short Circuit Current
IPK
Peak Output Current
f = 1.0 kHz
TJ = 25˚C, VI = 35V
TJ = 25˚C
∆VO/∆T
Average Temperature
IO = 5.0 mA
7.6
mV
8.4
TA = 25˚C, 10 Hz ≤ f ≤ 100 kHz
f = 120 Hz, IO = 350 mA, TJ = 25˚C
IO = 1.0A, TJ = 25˚C
RO
Units
Max
10.5V ≤ VI ≤ 25V
11.5V ≤ VI ≤ 23V, 5.0 mA ≤ IO ≤ 1.0A, P ≤ 15W
TJ = 25˚C
VO
VN
7.7
Typ
4.3
56
52
µV
72
dB
2.0
V
16
mΩ
0.45
A
2.2
A
0.8
mV/˚C
Coefficient of Output Voltage
Note 6: All characteristics are measured with a 0.22 µF capacitor from input to ground and a 0.1 µF capacitor from output to ground. All characteristics except noise
voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature
must be taken into account separately.
Typical Performance Characteristics
Maximum Average Power
Dissipation
Maximum Average Power
Dissipation
DS007781-22
Maximum Power
Dissipation (TO-263)
(See Note 2)
DS007781-23
DS007781-24
5
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Typical Performance Characteristics
Output Voltage (Normalized
to 1V at Tj = 25˚C)
(Continued)
Ripple Rejection
Ripple Rejection
DS007781-26
DS007781-27
DS007781-25
Note: Shaded area refers to LM340A/LM340,
LM7805C, LM7812C and LM7815C.
Output Impedance
Dropout Characteristics
Quiescent Current
DS007781-29
DS007781-28
DS007781-30
Note: Shaded area refers to LM340A/LM340,
LM7805C, LM7812C and LM7815C.
Peak Output Current
Quiescent Current
Dropout Voltage
DS007781-31
DS007781-32
Note: Shaded area refers to LM340A/LM340,
LM7805C, LM7812C and LM7815C.
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DS007781-33
Typical Performance Characteristics
(Continued)
Line Regulation
140AK-5.0, IOUT = 1A, TA = 25˚C
Line Regulation
140AK-5.0, VIN = 10V, TA = 25˚C
DS007781-5
DS007781-6
Equivalent Schematic
DS007781-7
short will cause the input to rapidly approach ground potential, while the output remains near the initial VOUTbecause of
the stored charge in the large output capacitor. The capacitor
will then discharge through a large internal input to output diode and parasitic transistors. If the energy released by the
capacitor is large enough, this diode, low current metal and
the regulator will be destroyed. The fast diode in Figure 1 will
shunt most of the capacitors discharge current around the
regulator. Generally no protection diode is required for values of output capacitance ≤ 10 µF.
Application Hints
The LM340/LM78XX series is designed with thermal protection, output short-circuit protection and output transistor safe
area protection. However, as with any IC regulator, it becomes necessary to take precautions to assure that the
regulator is not inadvertently damaged. The following describes possible misapplications and methods to prevent
damage to the regulator.
Shorting the Regulator Input: When using large capacitors
at the output of these regulators, a protection diode connected input to output (Figure 1) may be required if the input
is shorted to ground. Without the protection diode, an input
Raising the Output Voltage above the Input Voltage:
Since the output of the device does not sink current, forcing
7
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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.
(Continued)
the output high can cause damage to internal low current
paths in a manner similar to that just described in the “Shorting the Regulator Input” section.
Regulator Floating Ground (Figure 2): When the ground
pin alone becomes disconnected, the output approaches the
unregulated input, causing possible damage to other circuits
connected to VOUT. If ground is reconnected with power
“ON”, damage may also occur to the regulator. This fault is
most likely to occur when plugging in regulators or modules
with on card regulators into powered up sockets. Power
should be turned off first, thermal limit ceases operating, or
ground should be connected first if power must be left on.
Transient Voltages: If transients exceed the maximum
rated input voltage of the device, or reach more than 0.8V
below ground and have sufficient energy, they will damage
the regulator. The solution is to use a large input capacitor, a
series input breakdown diode, a choke, a transient suppressor or a combination of these.
θ(H–A) is specified numerically by the heatsink manufacturer
in this catalog, or shown in a curve that plots temperature
rise vs power dissipation for the heatsink.
HEATSINKING TO-263 AND SOT-223 PACKAGE PARTS
Both the TO-263 (“S”) and SOT-223 (“MP”) 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 plane.
shows for the TO-263 the measured values of θ(J–A) for different copper area sizes using a typical PCB with 1 ounce
copper and no solder mask over the copper area used for
heatsinking.
DS007781-39
FIGURE 4. θ(J–A) vs Copper (1 ounce)
Area for the TO-263 Package
DS007781-8
FIGURE 1. Input Short
As shown in the figure, increasing the copper area beyond 1
square inch produces very little improvement. It should also
be observed that the minimum value of θ(J–A) for the TO-263
package mounted to a PCB is 32˚C/W.
As a design aid, Figure 5 shows the maximum allowable
power dissipation compared to ambient temperature for the
TO-263 device (assuming θ(J–A) is 35˚C/W and the maximum junction temperature is 125˚C).
DS007781-9
FIGURE 2. Regulator Floating Ground
DS007781-40
FIGURE 5. Maximum Power Dissipation vs
TAMB for the TO-263 Package
DS007781-10
FIGURE 3. Transients
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8
Application Hints
(Continued)
Figures 6, 7 show the information for the SOT-223 package.
Figure 6 assumes a θ(J–A) of 74˚C/W for 1 ounce copper and
51˚C/W for 2 ounce copper and a maximum junction temperature of 125˚C.
DS007781-42
FIGURE 7. Maximum Power Dissipation vs
TAMB for the SOT-223 Package
DS007781-41
FIGURE 6. θ(J–A) vs Copper (2 ounce) Area
for the SOT-223 Package
Please see AN-1028 for power enhancement techniques to
be used with the SOT-223 package.
Typical Applications
Fixed Output Regulator
High Input Voltage Circuits
DS007781-14
DS007781-13
Note: Bypass capacitors are recommended for optimum stability and
transient response, and should be located as close as possible to the
regulator.
DS007781-15
9
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Typical Applications
(Continued)
High Current Voltage Regulator
DS007781-16
High Output Current, Short Circuit Protected
DS007781-17
Positive and Negative Regulator
DS007781-18
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10
Connection Diagrams and Ordering Information
TO-3 Metal Can Package (K)
TO-220 Power Package (T)
DS007781-11
DS007781-12
Bottom View
Steel Package Order Numbers:
LM140K-5.0
LM140K-12
LM140K-15
LM340K-12
LM340K-15
LM340K-5.0
See Package Number K02A
LM140K-5.0/883 LM140K-12/883 LM140K-15/883
See Package Number K02C
Top View
Plastic Package Order Numbers:
LM340AT-5.0 LM340T-5.0
LM340T-12 LM340T-15
LM7805CT LM7812CT
LM7815CT LM7808CT
See Package Number T03B
TO-39 Metal Can Package (H)
DS007781-19
Top View
Metal Can Order Numbers†:
LM140H-5.0/883
LM140H-6.0/883
LM140H-8.0/883
LM140H-12/883
LM140H-15/883
LM140H-24/883
See Package Number H03A
TO-263 Surface-Mount Package (S)
DS007781-21
Side View
Surface-Mount Package Order Numbers:
LM340S-5.0
LM340S-12
See Package Number TS3B
DS007781-20
Top View
3-Lead SOT-223
(Front View)
Order Number LM340MP-5.0
Package Marked NO0A
See Package Number MA04A
DS007781-43
†The specifications for the LM140H/883 devices are not contained in this datasheet. If specifications for these devices
are required, contact the National Semiconductor Sales Office/Distributors.
11
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Physical Dimensions
inches (millimeters) unless otherwise noted
TO-3 Metal Can Package (K)
Order Number LM140K-5.0, LM340K-5.0, LM140K-12, LM340K-12,
LM140K-15, LM340K-15, LM7806CK, LM7808CK, LM7818CK or LM7824CK
NS Package Number K02A
TO-3 Metal Can Package (K)
Mil-Aero Products
Order Number LM140K-5.0/883, LM140K-12/883, or LM140K-15/883
NS Package Number K02C
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12
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
TO-263 Surface-Mount Package (S)
Order Number LM340S-5.0 or LM340S-12
NS Package Number TS3B
13
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Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
TO-220 Power Package (T)
Order Number LM340AT/LM340T-5.0, LM340AT/LM340T-12, LM340AT/LM340T-15,
LM7805CT, LM7812CT, LM7815CT, LM7806CT, LM7808CT, LM7818CT or LM7824CT
NS Package Number T03B
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14
LM140/LM340A/LM340/LM7800C Series 3-Terminal Positive Regulators
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
3-Lead SOT-223 Package
Order Part Number LM340MP-5.0
NS Package Number MA04A
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