LM340_16 [TI]
1.5-A Fixed Voltage Regulators;型号: | LM340_16 |
厂家: | TEXAS INSTRUMENTS |
描述: | 1.5-A Fixed Voltage Regulators |
文件: | 总28页 (文件大小:3030K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LM340-N, LM78xx
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
LM340-N/LM78XX Series 3-Terminal Positive Regulators
Check for Samples: LM340-N, LM78xx
1
FEATURES
DESCRIPTION
The LM140/LM340A/LM340-N/LM78XXC 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.
2
•
•
Complete Specifications at 1A Load
Output Voltage Tolerances of ±2% at Tj = 25°C
and ±4% Over the Temperature Range
(LM340A)
•
Line Regulation of 0.01% of VOUT/V of ΔVIN at
1A Load (LM340A)
•
•
•
•
•
Load Regulation of 0.3% of VOUT/A (LM340A)
Internal Thermal Overload Protection
Internal Short-circuit Current Limit
Output Transistor Safe Area Protection
P+ Product Enhancement Tested
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-N/LM78XXC series is available in the
TO-220 plastic power package, and the LM340-N-5.0
is available in the SOT-223 package, as well as the
LM340-5.0 and LM340-12 in the surface-mount
DDPAK/TO-263 package.
Typical Applications
*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).
VOUT = 5V + (5V/R1 + IQ) R2 5V/R1 > 3 IQ,
load regulation (Lr) ≈ [(R1 + R2)/R1] (Lr of LM340-5).
Figure 1. Fixed Output Regulator
Figure 2. Adjustable Output Regulator
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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 © 2000–2013, Texas Instruments Incorporated
LM340-N, LM78xx
SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
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SOT-223
DDPAK/TO-263
ΔIQ = 1.3 mA over line and load changes.
Figure 3. Current Regulator
Figure 4. Comparison between SOT-223 and
DDPAK/TO-263 Packages
Scale 1:1
Connection Diagrams
Figure 5. DDPAK/TO-263 Surface-Mount Package
Top View
Figure 6. 3-Lead SOT-223
Top View
See Package Number DCY
See Package Number KTT0003B
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)(3)
DC Input Voltage
35V
Internally Limited
150°C
Internal Power Dissipation(4)
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
−65°C to +150°C
300°C
TO-3 Package (NDS)
TO-220 Package (NDE), DDPAK/TO-263
Package (KTT)
230°C
2 kV
ESD Susceptibility(5)
(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 ensured. For ensured specifications and test conditions see the Electrical
Characteristics.
(2) Military datasheets are available upon request. At the time of printing, the military datasheet 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 and
LM140K may also be procured as JAN devices on slash sheet JM38510/107.
(3) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and
specifications.
(4) 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 (NDS), 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 (NDE), 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 DDPAK\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.
(5) ESD rating is based on the human body model, 100 pF discharged through 1.5 kΩ.
Operating Conditions(1)
(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 ensured. For ensured specifications and test conditions see the Electrical
Characteristics.
2
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
Operating Conditions(1) (continued)
LM140
−55°C to +125°C
0°C to +125°C
0°C to +125°C
Temperature Range (TA)(2)
LM340A, LM340-N
LM7808C
(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 (NDS), 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 (NDE), 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 DDPAK\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.
Copyright © 2000–2013, Texas Instruments Incorporated
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LM340A Electrical Characteristics
IOUT = 1A, 0°C ≤ TJ ≤ + 125°C (LM340A) unless otherwise specified(1)
Output Voltage
5V
10V
Typ
5
12V
19V
Typ
12
15V
23V
Typ
15
Symbol
Input Voltage (unless otherwise noted)
Units
Parameter
Conditions
TJ = 25°C
Min
4.9
4.8
Max
5.1
Min
11.75
11.5
Max
12.25
12.5
Min
14.7
14.4
Max
VO
Output
Voltage
15.3
15.6
V
V
P
D ≤ 15W, 5 mA ≤ IO ≤ 1A
MIN ≤ VIN ≤ VMAX
5.2
V
(7.5 ≤ VIN ≤ 20)
10
(7.5 ≤ VIN ≤ 20)
(14.8 ≤ VIN ≤ 27)
18
(14.8 ≤ VIN ≤ 27)
(17.9 ≤ VIN ≤ 30)
22
(17.9 ≤ VIN ≤ 30)
V
ΔVO
Line
Regulation
IO = 500 mA
ΔVIN
mV
V
TJ = 25°C
ΔVIN
3
10
4
18
4
22
mV
V
(7.5 ≤ VIN ≤ 20)
(14.5 ≤ VIN ≤ 27)
(17.5 ≤ VIN ≤ 30)
TJ = 25°C
Over Temperature
ΔVIN
4
9
10
30
(20 ≤ VIN ≤ 26)
12
mV
mV
V
12
30
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
ΔVO
Load
TJ =
5 mA ≤ IO ≤ 1.5A
10
25
15
12
32
19
35
21
mV
mV
Regulation
25°C
250 mA ≤ IO
≤
750 mA
Over Temperature,
5 mA ≤ IO ≤ 1A
TJ = 25°C
25
60
75
mV
IQ
Quiescent
Current
6
6
6
mA
mA
mA
mA
V
Over Temperature
5 mA ≤ IO ≤ 1A
TJ = 25°C, IO = 1A
6.5
6.5
6.5
ΔIQ
Quiescent
Current
Change
0.5
0.5
0.5
0.8
0.8
0.8
V
MIN ≤ VIN ≤ VMAX
IO = 500 mA
MIN ≤ VIN ≤ VMAX
Output Noise TA = 25°C, 10 Hz ≤ f ≤ 100
(7.5 ≤ VIN ≤ 20)
0.8
(14.8 ≤ VIN ≤ 27)
0.8
(17.9 ≤ VIN ≤ 30)
0.8
mA
V
V
(8 ≤ VIN ≤ 25)
(15 ≤ VIN ≤ 30)
(17.9 ≤ VIN ≤ 30)
VN
40
75
90
μV
Voltage
kHz
Ripple
Rejection
TJ = 25°C, f = 120 Hz, IO
1A
=
68
68
80
61
61
72
60
60
70
dB
dB
or f = 120 Hz, IO = 500 mA,
Over Temperature,
V
MIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤ 28.5)
V
V
RO
Dropout
Voltage
TJ = 25°C, IO = 1A
2.0
2.0
2.0
Output
Resistance
f = 1 kHz
8
18
1.5
19
1.2
mΩ
A
Short-Circuit TJ = 25°C
Current
2.1
2.4
−0.6
Peak Output TJ = 25°C
Current
2.4
2.4
A
Average TC
of VO
Min, TJ = 0°C, IO = 5 mA
−1.5
−1.8
mV/°C
VIN
Input Voltage TJ = 25°C
Required to
7.5
14.5
17.5
V
Maintain Line
Regulation
(1) 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.
4
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
LM140 Electrical Characteristics(1)
−55°C ≤ TJ ≤ +150°C unless otherwise specified
Output Voltage
5V
10V
Typ
5
12V
19V
Typ
12
15V
23V
Typ
15
Symb
ol
Input Voltage (unless otherwise noted)
Units
Parameter
Conditions
Min
4.8
Max
5.2
Min
11.5
11.4
Max
12.5
12.6
Min
14.4
Max
15.6
VO
Output Voltage TJ = 25°C, 5 mA ≤ IO ≤ 1A
V
V
P
D ≤ 15W, 5 mA ≤ IO ≤ 1A
MIN ≤ VIN ≤ VMAX
4.75
5.25
14.25
15.75
V
(8 ≤ VIN ≤ 20)
3
(15.5 ≤ VIN ≤ 27)
(18.5 ≤ VIN ≤ 30)
V
ΔVO
Line
Regulation
IO = 500 TJ = 25°C
50
50
4
120
4
150
mV
V
mA
ΔVIN
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN ≤ 30)
−55°C ≤ TJ ≤
120
150
mV
+150°C
ΔVIN
(8 ≤ VIN ≤ 20)
(15 ≤ VIN ≤ 27)
120
(14.6 ≤ VIN ≤ 27)
60
(18.5 ≤ VIN ≤ 30)
150
(17.7 ≤ VIN ≤ 30)
75
V
mV
V
IO ≤ 1A
TJ = 25°C
50
ΔVIN
(7.5 ≤ VIN ≤ 20)
25
−55°C ≤ TJ ≤
mV
+150°C
ΔVIN
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
(20 ≤ VIN ≤ 26)
V
ΔVO
Load
Regulation
TJ =
25°C
5 mA ≤ IO
1.5A
≤
10
50
25
50
12
120
12
150
mV
250 mA ≤ IP
750 mA
≤
60
75
mV
mV
−55°C ≤ TJ ≤ +150°C,
5 mA ≤ IO ≤ 1A
120
150
IQ
Quiescent
Current
IO ≤ 1A
TJ = 25°C
6
7
6
7
6
7
mA
mA
−55°C ≤ TJ ≤
+150°C
ΔIQ
Quiescent
Current
Change
5 mA ≤ IO ≤ 1A
0.5
0.5
0.5
mA
mA
V
TJ = 25°C, IO ≤ 1A
0.8
0.8
0.8
0.8
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 20)
(15 ≤ VIN ≤ 27)
0.8
(18.5 ≤ VIN ≤ 30)
0.8
IO = 500 mA, −55°C ≤ TJ ≤
mA
+150°C
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 25)
(15 ≤ VIN ≤ 30)
(18.5 ≤ VIN ≤ 30)
V
VN
Output Noise
Voltage
TA = 25°C, 10 Hz ≤ f ≤ 100
kHz
40
75
90
μV
Ripple
Rejection
f = 120
Hz
I
O ≤ 1A, TJ =
68
68
80
61
61
72
60
60
70
dB
dB
25°C or
IO ≤ 500 mA,
−55°C ≤ TJ
≤+150°C
V
MIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤ 28.5)
V
V
RO
Dropout
Voltage
TJ = 25°C, IO = 1A
2.0
2.0
2.0
Output
Resistance
f = 1 kHz
8
18
1.5
19
1.2
mΩ
A
Short-Circuit
Current
TJ = 25°C
2.1
2.4
−0.6
Peak Output
Current
TJ = 25°C
2.4
2.4
A
Average TC of 0°C ≤ TJ ≤ +150°C, IO = 5
VOUT mA
−1.5
−1.8
mV/°C
(1) 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.
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LM140 Electrical Characteristics(1) (continued)
−55°C ≤ TJ ≤ +150°C unless otherwise specified
Output Voltage
5V
12V
19V
Typ
15V
23V
Typ
Symb
ol
Input Voltage (unless otherwise noted)
10V
Typ
Units
Parameter
Conditions
Min
Max
Min
Max
Min
Max
VIN
Input Voltage
Required to
Maintain Line
Regulation
TJ = 25°C, IO ≤ 1A
7.5
14.6
17.7
V
LM340-N Electrical Characteristics(1)
0°C ≤ TJ ≤ +125°C unless otherwise specified
Output Voltage
5V
10V
Typ
5
12V
19V
Typ
12
15V
23V
Typ
15
Symbol
Input Voltage (unless otherwise noted)
Units
Parameter
Conditions
Min
Max
5.2
Min
11.5
11.4
Max
12.5
12.6
Min
14.4
Max
15.6
VO
Output Voltage
TJ = 25°C, 5 mA ≤ IO ≤ 1A
4.8
V
V
P
D ≤ 15W, 5 mA ≤ IO ≤ 1A 4.75
MIN ≤ VIN ≤ VMAX
5.25
14.25
15.75
V
(7.5 ≤ VIN ≤ 20)
(14.5 ≤ VIN ≤ 27)
(17.5 ≤ VIN ≤ 30)
V
ΔVO
Line Regulation IO = 500 TJ = 25°C
3
50
4
120
4
150
mV
V
mA
ΔVIN
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN ≤ 30)
0°C ≤ TJ ≤
50
120
150
mV
+125°C
ΔVIN
(8 ≤ VIN ≤ 20)
(15 ≤ VIN ≤ 27)
120
(14.6 ≤ VIN ≤ 27)
60
(18.5 ≤ VIN ≤ 30)
150
(17.7 ≤ VIN ≤ 30)
75
V
mV
V
IO ≤ 1A
TJ = 25°C
50
ΔVIN
(7.5 ≤ VIN ≤ 20)
25
0°C ≤ TJ ≤
mV
+125°C
ΔVIN
(8 ≤ VIN ≤ 12)
(16 ≤ VIN ≤ 22)
12 120
(20 ≤ VIN ≤ 26)
12 150
V
ΔVO
Load Regulation TJ =
25°C
5 mA ≤ IO
1.5A
≤
10
50
25
50
mV
250 mA ≤ IO
750 mA
≤
60
75
mV
mV
5 mA ≤ IO ≤ 1A, 0°C ≤ TJ
≤ +125°C
120
150
IQ
Quiescent
Current
IO ≤ 1A
TJ = 25°C
8
8
8
mA
mA
0°C ≤ TJ ≤
8.5
8.5
8.5
+125°C
ΔIQ
Quiescent
Current Change
5 mA ≤ IO ≤ 1A
0.5
0.5
0.5
mA
mA
V
TJ = 25°C, IO ≤ 1A
1.0
1.0
1.0
V
MIN ≤ VIN ≤ VMAX
O ≤ 500 mA, 0°C ≤ TJ ≤
+125°C
MIN ≤ VIN ≤ VMAX
(7.5 ≤ VIN ≤ 20)
1.0
(14.8 ≤ VIN ≤ 27)
1.0
(17.9 ≤ VIN ≤ 30)
1.0
I
mA
V
(7 ≤ VIN ≤ 25)
(14.5 ≤ VIN ≤ 30)
(17.5 ≤ VIN ≤ 30)
V
VN
Output Noise
Voltage
TA = 25°C, 10 Hz ≤ f ≤
100 kHz
40
75
90
μV
Ripple Rejection
I
O ≤ 1A, TJ =
62
62
80
55
55
72
54
54
70
dB
dB
25°C
f = 120
Hz
or IO ≤ 500
mA,
0°C ≤ TJ ≤
+125°C
VMIN ≤ VIN ≤ VMAX
(8 ≤ VIN ≤ 18)
(15 ≤ VIN ≤ 25)
(18.5 ≤ VIN ≤ 28.5)
V
(1) 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.
6
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LM340-N Electrical Characteristics(1) (continued)
0°C ≤ TJ ≤ +125°C unless otherwise specified
Output Voltage
5V
10V
Typ
2.0
8
12V
19V
Typ
2.0
15V
23V
Typ
2.0
Symbol
Input Voltage (unless otherwise noted)
Units
Parameter
Conditions
Min
Max
Min
Max
Min
Max
RO
Dropout Voltage TJ = 25°C, IO = 1A
V
Output
Resistance
f = 1 kHz
TJ = 25°C
TJ = 25°C
18
19
mΩ
Short-Circuit
Current
2.1
2.4
1.5
2.4
1.2
2.4
A
A
Peak Output
Current
Average TC of
VOUT
0°C ≤ TJ ≤ +125°C, IO = 5
mA
−0.6
−1.5
−1.8
mV/°C
VIN
Input Voltage
Required to
Maintain Line
Regulation
TJ = 25°C, IO ≤ 1A
7.5
14.6
17.7
V
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(1)
LM7808C
Typ
8.0
Units
Min
Max
8.3
160
80
VO
Output Voltage
TJ = 25°C
TJ = 25°C
7.7
V
ΔVO
Line Regulation
10.5V ≤ VI ≤ 25V
6.0
mV
11.0V ≤ VI ≤ 17V
2.0
ΔVO
Load Regulation
TJ = 25°C
5.0 mA ≤ IO ≤ 1.5A
250 mA ≤ IO ≤ 750 mA
12
160
80
mV
4.0
VO
IQ
Output Voltage
Quiescent Current
Quiescent
11.5V ≤ VI ≤ 23V, 5.0 mA ≤ IO ≤ 1.0A, P ≤ 15W
TJ = 25°C
7.6
56
8.4
8.0
1.0
0.5
V
4.3
mA
mA
ΔIQ
With Line
With Load
11.5V ≤ VI ≤ 25V
Current Change
Noise
5.0 mA ≤ IO ≤ 1.0A
VN
TA = 25°C, 10 Hz ≤ f ≤ 100 kHz
f = 120 Hz, IO = 350 mA, TJ = 25°C
IO = 1.0A, TJ = 25°C
f = 1.0 kHz
52
72
μV
dB
V
ΔVI/ΔVO Ripple Rejection
VDO
RO
Dropout Voltage
2.0
16
Output Resistance
mΩ
A
IOS
Output Short Circuit Current
Peak Output Current
TJ = 25°C, VI = 35V
0.45
2.2
IPK
TJ = 25°C
A
ΔVO/ΔT
Average Temperature Coefficient of IO = 5.0 mA
Output Voltage
0.8
mV/°C
(1) 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.
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Typical Performance Characteristics
Maximum Average Power Dissipation
Maximum Average Power Dissipation
Figure 7.
Figure 8.
Maximum Power Dissipation (DDPAK/TO-263)
(See Note 2)
Output Voltage (Normalized to 1V at TJ = 25°C)
Shaded area refers to LM340A/LM340-N, LM7805C, LM7812C and
LM7815C.
Figure 9.
Figure 10.
Ripple Rejection
Ripple Rejection
Figure 11.
Figure 12.
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
Typical Performance Characteristics (continued)
Output Impedance
Dropout Characteristics
Figure 13.
Figure 14.
Quiescent Current
Peak Output Current
Shaded area refers to LM340A/LM340-N, LM7805C, LM7812C and
LM7815C.
Figure 15.
Figure 16.
Dropout Voltage
Quiescent Current
Shaded area refers to LM340A/LM340-N, LM7805C, LM7812C and
LM7815C.
Figure 17.
Figure 18.
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Typical Performance Characteristics (continued)
Line Regulation
140AK-5.0, IOUT = 1A, TA = 25°C
Line Regulation
140AK-5.0, VIN = 10V, TA = 25°C
Figure 19.
Figure 20.
Equivalent Schematic
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
APPLICATION HINTS
The LM340-N/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 21) may be required if the input is shorted to ground. Without the protection diode, an input 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 21 will shunt most of the capacitors
discharge current around the regulator. Generally no protection diode is required for values of output capacitance
≤ 10 μF.
RAISING THE OUTPUT VOLTAGE ABOVE THE INPUT VOLTAGE
Since the output of the device does not sink current, forcing 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 22)
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.
Figure 21. Input Short
Figure 22. Regulator Floating Ground
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Figure 23. Transients
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.
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 DDPAK/TO-263 AND SOT-223 PACKAGE PARTS
Both the DDPAK/TO-263 (KTT) and 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 plane.
shows for the DDPAK/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.
Figure 24. θ(J–A) vs Copper (1 ounce) Area for the DDPAK/TO-263 Package
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 DDPAK/TO-263 package mounted to a PCB is
32°C/W.
As a design aid, Figure 25 shows the maximum allowable power dissipation compared to ambient temperature
for the DDPAK/TO-263 device (assuming θ(J–A) is 35°C/W and the maximum junction temperature is 125°C).
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Figure 25. Maximum Power Dissipation vs TAMB for the DDPAK/TO-263 Package
Figure 26 and Figure 27 show the information for the SOT-223 package. Figure 26 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.
Figure 26. θ(J–A) vs Copper (2 ounce) Area
for the SOT-223 Package
Figure 27. Maximum Power Dissipation vs
TAMB for the SOT-223 Package
Please see AN-1028 (SNVA036) for power enhancement techniques to be used with the SOT-223 package.
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Typical Applications
INPUT
OUTPUT
V
V
O
I
+
+
0.22 mF
0.1 mF
GND
Bypass capacitors are recommended for optimum stability and transient response, and should be located as close as
possible to the regulator.
Figure 28. Fixed Output Regulator
INPUT
OUTPUT
V
I
V
O
0.1 mF
(NOTE 1)
0.22 mF
GND
INPUT
OUTPUT
V
V
O
I
GND
0.22 mF
0.1 mF
Figure 29. High Input Voltage Circuits
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
Q1
2N6133
I
Q1
V
I
R1
3.0W
I
REG
INPUT
I
O
MAX
OUTPUT
V
O
0.1 mF
0.22 mF
GND
Figure 30. High Current Voltage Regulator
Q1
2N6132
R
SC
IN
Q2
2N6124
INPUT
OUT
OUTPUT
R1
3.0W
0.1 mF
0.22 mF
GND
Figure 31. High Output Current, Short Circuit Protected
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INPUT
OUTPUT
+ OUT
+
+
0.1 mF
GND
INPUT
OUTPUT
+
+
0.1 mF
GND
- OUT
Figure 32. Positive and Negative Regulator
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SNOSBT0I –FEBRUARY 2000–REVISED MARCH 2013
REVISION HISTORY
Changes from Revision H (March 2013) to Revision I
Page
•
Changed layout of National Data Sheet to TI format .......................................................................................................... 16
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PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
PACKAGING INFORMATION
Orderable Device
LM340AT-5.0
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
0 to 70
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
NRND
TO-220
TO-220
TO-3
NDE
3
3
2
2
45
TBD
Call TI
Call TI
LM340AT
5.0 P+
LM340AT-5.0/NOPB
LM340K-5.0
ACTIVE
ACTIVE
ACTIVE
NDE
NDS
NDS
45
50
50
Pb-Free (RoHS
Exempt)
CU SN
Level-1-NA-UNLIM
Call TI
0 to 70
LM340AT
5.0 P+
TBD
Call TI
0 to 70
LM340K
-5.0 7805P+
LM340K-5.0/NOPB
TO-3
Green (RoHS
& no Sb/Br)
POST-PLATE
Level-1-NA-UNLIM
0 to 70
LM340K
-5.0 7805P+
LM340MP-5.0
NRND
SOT-223
SOT-223
DCY
DCY
4
4
1000
1000
TBD
Call TI
CU SN
Call TI
0 to 70
0 to 70
N00A
N00A
LM340MP-5.0/NOPB
ACTIVE
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM340MPX-5.0/NOPB
LM340S-12/NOPB
LM340S-5.0
ACTIVE
ACTIVE
NRND
SOT-223
DCY
KTT
KTT
KTT
KTT
KTT
KTT
KTT
NDE
NDE
NDE
4
3
3
3
3
3
3
3
3
3
3
2000
45
Green (RoHS
& no Sb/Br)
CU SN
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
Level-1-260C-UNLIM
Level-3-245C-168 HR
Call TI
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
N00A
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
LM340S
-12 P+
DDPAK/
TO-263
45
TBD
LM340S
-5.0 P+
LM340S-5.0/NOPB
LM340SX-12
ACTIVE
NRND
DDPAK/
TO-263
45
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM340S
-5.0 P+
DDPAK/
TO-263
500
500
500
500
45
TBD
LM340S
-12 P+
LM340SX-12/NOPB
LM340SX-5.0
ACTIVE
NRND
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM340S
-12 P+
DDPAK/
TO-263
TBD
LM340S
-5.0 P+
LM340SX-5.0/NOPB
LM340T-12
ACTIVE
NRND
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM340S
-5.0 P+
TO-220
TO-220
TO-220
TBD
LM340T12
7812 P+
LM340T-12/NOPB
LM340T-15
ACTIVE
NRND
45
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
Call TI
LM340T12
7812 P+
45
TBD
LM340T15
7815 P+
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
0 to 70
Device Marking
Samples
Drawing
Qty
(1)
(2)
(6)
(3)
(4/5)
LM340T-15/NOPB
LM340T-5.0
ACTIVE
TO-220
TO-220
TO-220
TO-220
TO-220
TO-220
NDE
3
3
3
3
3
3
45
Green (RoHS
& no Sb/Br)
CU SN
Call TI
CU SN
CU SN
Call TI
CU SN
Level-1-NA-UNLIM
LM340T15
7815 P+
NRND
ACTIVE
ACTIVE
NRND
NDE
NDG
NDE
NDE
NDE
45
45
45
45
45
TBD
Call TI
0 to 70
LM340T5
7805 P+
LM340T-5.0/LF01
LM340T-5.0/NOPB
LM7812CT
Pb-Free (RoHS
Exempt)
Level-4-260C-72 HR
Level-1-NA-UNLIM
Call TI
LM340T5
7805 P+
Pb-Free (RoHS
Exempt)
0 to 70
0 to 70
0 to 70
LM340T5
7805 P+
TBD
LM340T12
7812 P+
LM7812CT/NOPB
ACTIVE
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
LM340T12
7812 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)
(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.
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
1-Nov-2013
(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.
Addendum-Page 3
PACKAGE MATERIALS INFORMATION
www.ti.com
8-Apr-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
LM340MP-5.0
SOT-223
SOT-223
DCY
DCY
DCY
KTT
4
4
4
3
1000
1000
2000
500
330.0
330.0
330.0
330.0
16.4
16.4
16.4
24.4
7.0
7.0
7.0
7.5
7.5
7.5
2.2
2.2
2.2
5.0
12.0
12.0
12.0
16.0
16.0
16.0
16.0
24.0
Q3
Q3
Q3
Q2
LM340MP-5.0/NOPB
LM340MPX-5.0/NOPB SOT-223
LM340SX-12
LM340SX-12/NOPB
LM340SX-5.0
DDPAK/
TO-263
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
DDPAK/
TO-263
KTT
KTT
KTT
3
3
3
500
500
500
330.0
330.0
330.0
24.4
24.4
24.4
5.0
5.0
5.0
16.0
16.0
16.0
24.0
24.0
24.0
Q2
Q2
Q2
DDPAK/
TO-263
LM340SX-5.0/NOPB
DDPAK/
TO-263
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
8-Apr-2013
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
LM340MP-5.0
LM340MP-5.0/NOPB
LM340MPX-5.0/NOPB
LM340SX-12
SOT-223
SOT-223
DCY
DCY
DCY
KTT
KTT
KTT
KTT
4
4
4
3
3
3
3
1000
1000
2000
500
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
35.0
35.0
35.0
45.0
45.0
45.0
45.0
SOT-223
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
LM340SX-12/NOPB
LM340SX-5.0
500
500
LM340SX-5.0/NOPB
500
Pack Materials-Page 2
MECHANICAL DATA
NDS0002A
www.ti.com
MECHANICAL DATA
NDE0003B
www.ti.com
MECHANICAL DATA
NDG0003F
T03F (Rev B)
www.ti.com
MECHANICAL DATA
MPDS094A – APRIL 2001 – REVISED JUNE 2002
DCY (R-PDSO-G4)
PLASTIC SMALL-OUTLINE
6,70 (0.264)
6,30 (0.248)
3,10 (0.122)
2,90 (0.114)
4
0,10 (0.004)
M
3,70 (0.146)
3,30 (0.130)
7,30 (0.287)
6,70 (0.264)
Gauge Plane
1
2
3
0,25 (0.010)
0,84 (0.033)
0,66 (0.026)
0°–10°
2,30 (0.091)
0,10 (0.004)
M
4,60 (0.181)
0,75 (0.030) MIN
1,70 (0.067)
1,50 (0.059)
1,80 (0.071) MAX
0,35 (0.014)
0,23 (0.009)
Seating Plane
0,08 (0.003)
0,10 (0.0040)
0,02 (0.0008)
4202506/B 06/2002
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MECHANICAL DATA
KTT0003B
TS3B (Rev F)
BOTTOM SIDE OF PACKAGE
www.ti.com
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