LM2940CSX-9.0 [TI]
LM2940-N/LM2940C 1A Low Dropout Regulator; LM2940 -N / LM2940C 1A低压降稳压器
| 型号： | LM2940CSX-9.0 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LM2940-N/LM2940C 1A Low Dropout Regulator |
| 文件： | 总35页 (文件大小：2445K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM2940-N, LM2940C
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SNVS769I –MARCH 2000–REVISED APRIL 2013
LM2940-N/LM2940C 1A Low Dropout Regulator
Check for Samples: LM2940-N, LM2940C
1
FEATURES
DESCRIPTION
The LM2940-N/LM2940C positive voltage regulator
2
•
•
•
•
•
•
•
Dropout Voltage Typically 0.5V @IO = 1A
Output Current in Excess of 1A
features the ability to source 1A of output current with
a dropout voltage of typically 0.5V and a maximum of
1V over the entire temperature range. Furthermore, a
quiescent current reduction circuit has been included
which reduces the ground current when the
differential between the input voltage and the output
voltage exceeds approximately 3V. The quiescent
current with 1A of output current and an input-output
differential of 5V is therefore only 30 mA. Higher
quiescent currents only exist when the regulator is in
the dropout mode (VIN − VOUT ≤ 3V).
Output Voltage Trimmed Before Assembly
Reverse Battery Protection
Internal Short Circuit Current Limit
Mirror Image Insertion Protection
P+ Product Enhancement Tested
Designed also for vehicular applications, the LM2940-
N/LM2940C and all regulated circuitry are protected
from reverse battery installations or 2-battery jumps.
During line transients, such as load dump when the
input voltage can momentarily exceed the specified
maximum operating voltage, the regulator will
automatically shut down to protect both the internal
circuits and the load. The LM2940/LM2940C cannot
be harmed by temporary mirror-image insertion.
Familiar regulator features such as short circuit and
thermal overload protection are also provided.
Typical Application
*Required if regulator is located far from power supply filter.
**COUT must be at least 22 μF to maintain stability. May be increased without bound to maintain regulation during
transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating
temperature range as the regulator and the ESR is critical; see curve.
1
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.
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
LM2940-N, LM2940C
SNVS769I –MARCH 2000–REVISED APRIL 2013
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Connection Diagrams
Figure 1. TO-220 (NDE) Plastic Package
Front View
Figure 2. SOT-223 (DCY) 3-Lead
Front View
See Package Number DCY0004A
See Package Number NDE0003B
Figure 3. 16-Lead CDIP (NFE)
Top View
See Package Number NFE0016A
Figure 4. 16-Lead CLGA (NAC)
Top View
See Package Number NAC0016A
Figure 5. DDPAK/ TO-263 (KTT)
Top View
Figure 6. Side View
See Package Number KTT0003B
N/C
1
N/C
8
7
6
5
GND
2
3
4
GND
GND
INPUT
N/C
V
OUT
V
OUT
Pin 2 and pin 7 are fused to center DAP
Pin 5 and 6 need to be tied together on PCB board
Figure 7. WSON (NGN) 8-Lead
Top View
See Package Number NGN0008A
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.
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(1)(2)
Absolute Maximum Ratings
LM2940-N KTT, NFE, NAC, NDE, DCY ≤ 100 ms
60V
45V
LM2940C KTT, NDE ≤ 1 ms
Internal Power Dissipation(3)
Internally Limited
150°C
Maximum Junction Temperature
Storage Temperature Range
−65°C ≤ TJ ≤ +150°C
260°C, 10s
235°C, 30s
260°C, 30s
235°C, 30s
2 kV
TO-220 (NDE), Wave
DDPAK/ TO-263 (KTT)
SOT-223 (DCY)
(4)
Soldering Temperature
WSON-8 (NGN)
(5)
ESD Susceptibility
(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) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The maximum allowable power dissipation is a function of the maximum junction temperature, TJ, the junction-to-ambient thermal
resistance, θJA, and the ambient temperature, TA. Exceeding the maximum allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown. The value of θJA (for devices in still air with no heatsink) is 60°C/W for the
TO-220 package, 80°C/W for the DDPAK/TO-263 package, and 174°C/W for the SOT-223 package. The effective value of θJA can be
reduced by using a heatsink (see Application Hints for specific information on heatsinking). The value of θJA for the WSON package is
specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance
and power dissipation for the WSON package, refer to Application Note AN-1187 (SNOA401). It is recommended that 6 vias be placed
under the center pad to improve thermal performance.
(4) Refer to JEDEC J-STD-020C for surface mount device (SMD) package reflow profiles and conditions. Unless otherwise stated, the
temperature and time are for Sn-Pb (STD) only.
(5) ESD rating is based on the human body model, 100 pF discharged through 1.5 kΩ.
(1)
Operating Conditions
Input Voltage
26V
−40°C ≤ TJ ≤ 125°C
0°C ≤ TJ ≤ 125°C
LM2940-N NDE, LM2940-N KTT
LM2940C NDE, LM2940C KTT
LM2940-N DCY
Temperature Range
−40°C ≤ TA ≤ 85°C
−55°C ≤ TJ ≤ 125°C
−40°C ≤ TJ ≤ 125°C
LM2940-N NFE, LM2940-N NAC
LM2940-N NGN
(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.
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Electrical Characteristics
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
Parameter Conditions
5V
8V
Typ
LM2940-N
Limit(1)
LM2940-
N/883
Typ
LM2940-N
Limit(1)
LM2940-
N/883
Units
Limit(2)
Limit(2)
Output Voltage
5 mA ≤ IO ≤ 1A
6.25V ≤ VIN ≤ 26V
9.4V ≤ VIN ≤ 26V
5.00
20
4.85/4.75
5.15/5.25
4.85/4.75
8.00
20
7.76/7.60
8.24/8.40
7.76/7.60
VMIN
5.15/5.25
8.24/8.40
VMAX
Line Regulation
Load Regulation
VO + 2V ≤ VIN ≤ 26V,
IO = 5 mA
50
40/50
80
50/80
mVMAX
mVMAX
50 mA ≤ IO ≤ 1A
LM2940-N, LM2940-N/883
LM2940C
35
35
50/80
50/100
55
55
80/130
80/130
50
80
Output Impedance
Quiescent Current
100 mADC and
20 mArms,
35
1000/1000
55
1000/1000
mΩ
fO = 120 Hz
VO +2V ≤ VIN ≤ 26V,
IO = 5 mA
LM2940-N, LM2940-N/883
LM2940C
10
10
30
15/20
15
15/20
50/60
10
30
15/20
45/60
15/20
50/60
mAMAX
mAMAX
μVrms
VIN = VO + 5V,
IO = 1A
45/60
Output Noise Voltage 10 Hz − 100 kHz,
150
700/700
240
1000/1000
IO = 5 mA
Ripple Rejection
fO = 120 Hz, 1 Vrms
IO = 100 mA
LM2940-N
,
72
72
60/54
66
66
54/48
dBMIN
dBMIN
LM2940C
60
54
fO = 1 kHz, 1 Vrms
IO = 5 mA
,
60/50
54/48
Long Term Stability
Dropout Voltage
20
32
mV/
1000 Hr
VMAX
IO = 1A
0.5
0.8/1.0
0.7/1.0
0.5
0.8/1.0
0.7/1.0
IO = 100 mA
110
150/200
150/200
110
150/200
150/200
mVMAX
(3)
Short Circuit
Current
See
1.9
1.6
1.5/1.3
1.9
1.6
1.6/1.3
AMIN
Maximum Line
Transient
RO = 100Ω
LM2940-N, T ≤ 100 ms
LM2940-N/883, T ≤ 20 ms
LM2940C, T ≤ 1 ms
RO = 100Ω
75
55
60/60
75
55
60/60
VMIN
40/40
40/40
45
45
Reverse Polarity
DC Input Voltage
LM2940-N, LM2940-N/883
LM2940C
−30
−30
−15/−15
−15
−15/−15
−30
−30
−15/−15
−15
−15/−15
VMIN
(1) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits at TA = TJ = 25°C are 100% production tested. All limits at temperature extremes are specified via correlation
using standard Statistical Quality Control methods.
(2) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits are 100% production tested and are used to calculate Outgoing Quality Levels.
(3) Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
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Electrical Characteristics (continued)
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
Parameter Conditions
5V
8V
Typ
LM2940-N
Limit(1)
LM2940-
N/883
Typ
LM2940-N
Limit(1)
LM2940-
N/883
Units
Limit(2)
Limit(2)
Reverse Polarity
Transient Input
Voltage
RO = 100Ω
LM2940-N, T ≤ 100 ms
LM2940-N/883, T ≤ 20 ms
LM2940C, T ≤ 1 ms
−75
−55
−50/−50
−45/−45
−75
−50/−50
VMIN
−45/−45
−45/−45
Electrical Characteristics
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
9V
LM2940-N
10V
LM2940-N
Units
Parameter
Conditions
Typ
Limit
Typ
Limit
(1)
(1)
Output Voltage
10.5V ≤ VIN ≤ 26V
11.5V ≤ VIN ≤ 26V
5 mA ≤ IO ≤1A
9.00
8.73/8.55
9.27/9.45
90
10.00
9.70/9.50
10.30/10.50
100
VMIN
VMAX
Line Regulation
Load Regulation
VO + 2V ≤ VIN ≤ 26V,
IO = 5 mA
20
20
65
65
mVMAX
50 mA ≤ IO ≤ 1A
LM2940-N
60
60
90/150
100/165
mVMAX
LM2940C
90
Output Impedance
Quiescent Current
100 mADC and
20 mArms,
60
mΩ
fO = 120 Hz
VO +2V ≤ VIN < 26V,
IO = 5 mA
LM2940-N
10
10
15/20
15
10
15/20
45/60
mAMAX
LM2940C
VIN = VO + 5V, IO = 1A
10 Hz − 100 kHz,
IO = 5 mA
30
45/60
30
mAMAX
Output Noise Voltage
Ripple Rejection
270
300
μVrms
fO = 120 Hz, 1 Vrms
IO = 100 mA
LM2940-N
,
64
64
34
52/46
63
36
51/45
dBMIN
LM2940C
52
Long Term
Stability
mV/
1000 Hr
VMAX
Dropout Voltage
IO = 1A
0.5
110
1.9
0.8/1.0
150/200
1.6
0.5
110
1.9
0.8/1.0
150/200
1.6
IO = 100 mA
mVMAX
AMIN
(2)
Short Circuit Current
See
(1) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits at TA = TJ = 25°C are 100% production tested. All limits at temperature extremes are specified via correlation
using standard Statistical Quality Control methods.
(2) Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
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Electrical Characteristics (continued)
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
9V
LM2940-N
10V
LM2940-N
Units
Parameter
Conditions
Typ
Limit
Typ
Limit
(1)
(1)
Maximum Line Transient RO = 100Ω
T ≤ 100 ms
LM2940-N
LM2940C
75
55
60/60
75
60/60
VMIN
45
Reverse Polarity
DC Input Voltage
RO = 100Ω
LM2940-N
LM2940C
RO = 100Ω
T ≤ 100 ms
LM2940-N
LM2940C
−30
−30
−15/−15
−15
−30
−15/−15
VMIN
Reverse Polarity
Transient Input Voltage
−75
−55
−50/−50
−45/−45
−75
−50/−50
VMIN
Electrical Characteristics
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
Conditions
12V
15V
Parameter
Typ
LM2940-N
LM2940-
N/833
Limit
Typ
LM2940-N
LM2940-
N/833
Limit
Units
(1)
(1)
Limit
Limit
(2)
(2)
Output Voltage
13.6V ≤ VIN ≤ 26V
16.75V ≤ VIN ≤ 26V
5 mA ≤ IO ≤1A
12.0 11.64/11.40
11.64/11.40 15.0 14.55/14.25
14.55/14.25
VMIN
0
0
12.36/12.60
12.36/12.60
75/120
15.45/15.75
15.45/15.75
95/150
VMAX
Line Regulation
Load Regulation
VO + 2V ≤ VIN ≤ 26V,
IO = 5 mA
20
120
20
150
mVMAX
50 mA ≤ IO ≤ 1A
LM2940-N, LM2940-N/883
LM2940C
55
55
120/200
120/190
150/240
mVMAX
120
70
150
Output Impedance
100 mADC and
20 mArms,
80
1000/1000
100
1000/1000
mΩ
fO = 120 Hz
Quiescent
Current
VO +2V ≤ VIN ≤ 26V,
IO = 5 mA
LM2940-N, LM2940-N/883
LM2940C
10
10
15/20
15
15/20
15/20
mAMAX
10
30
15
VIN = VO + 5V, IO = 1A
10 Hz − 100 kHz,
IO = 5 mA
30
45/60
50/60
45/60
50/60
mAMAX
Output Noise
Voltage
360
1000/1000
450
1000/1000
μVrms
(1) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits at TA = TJ = 25°C are 100% production tested. All limits at temperature extremes are specified via correlation
using standard Statistical Quality Control methods.
(2) All limits are specified at TA = TJ = 25°C only (standard typeface) or over the entire operating temperature range of the indicated device
(boldface type). All limits are 100% production tested and are used to calculate Outgoing Quality Levels.
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Electrical Characteristics (continued)
VIN = VO + 5V, IO = 1A, CO = 22 μF, unless otherwise specified. Boldface limits apply over the entire operating
temperature range of the indicated device. All other specifications apply for TA = TJ = 25°C.
Output Voltage (VO)
Parameter Conditions
12V
15V
Typ
LM2940-N
LM2940-
N/833
Limit
Typ
LM2940-N
LM2940-
N/833
Limit
Units
(1)
(1)
Limit
Limit
(2)
(2)
Ripple Rejection
fO = 120 Hz, 1 Vrms
IO = 100 mA
LM2940-N
,
66
66
54/48
dBMIN
dBMIN
LM2940C
54
64
60
52
fO = 1 kHz, 1 Vrms
IO = 5 mA
,
52/46
48/42
Long Term Stability
Dropout Voltage
mV/
1000 Hr
48
IO = 1A
0.5
110
1.9
0.8/1.0
150/200
1.6
0.7/1.0
150/200
1.6/1.3
0.5
110
1.9
0.8/1.0
150/200
1.6
0.7/1.0
150/200
1.6/1.3
VMAX
mVMAX
AMIN
IO = 100 mA
(3)
Short Circuit Current See
Maximum Line
Transient
RO = 100Ω
LM2940-N, T ≤ 100 ms
LM2940-N/883, T ≤ 20 ms
LM2940C, T ≤ 1 ms
RO = 100Ω
75
55
60/60
40/40
40/40
VMIN
45
55
45
Reverse Polarity
DC Input Voltage
LM2940-N, LM2940-N/883
LM2940C
−30
−30
−15/−15
−15
−15/−15
−15/−15
VMIN
−30
−15
Reverse Polarity
Transient Input
Voltage
RO = 100Ω
LM2940-N, T ≤ 100 ms
LM2940-N/883, T ≤ 20 ms
LM2940C, T ≤ 1 ms
−75
−50/−50
−45/−45
−45/−45
VMIN
−55
−45/−45
−55
−45/−45
(3) Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature.
Thermal Performance
3-Lead TO-220
4
4
Thermal Resistance
Junction-to-Case, θ(JC)
°C/W
3-Lead DDPAK/TO-263
(1)
3-Lead TO-220
60
80
174
35
(1)
3-Lead DDPAK/TO-263
SOT-223(1)
Thermal Resistance
Junction-to-Ambient, θ(JA)
°C/W
(1)
8-Lead WSON
(1) The maximum allowable power dissipation is a function of the maximum junction temperature, TJ, the junction-to-ambient thermal
resistance, θJA, and the ambient temperature, TA. Exceeding the maximum allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown. The value of θJA (for devices in still air with no heatsink) is 60°C/W for the
TO-220 package, 80°C/W for the DDPAK/TO-263 package, and 174°C/W for the SOT-223 package. The effective value of θJA can be
reduced by using a heatsink (see Application Hints for specific information on heatsinking). The value of θJA for the WSON package is
specifically dependent on PCB trace area, trace material, and the number of layers and thermal vias. For improved thermal resistance
and power dissipation for the WSON package, refer to Application Note AN-1187 (SNOA401). It is recommended that 6 vias be placed
under the center pad to improve thermal performance.
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Typical Performance Characteristics
Dropout Voltage
vs.
Temperature
Dropout Voltage
Figure 8.
Figure 9.
Output Voltage
vs.
Temperature
Quiescent Current
vs.
Temperature
Figure 10.
Figure 11.
Quiescent Current
Quiescent Current
Figure 12.
Figure 13.
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Typical Performance Characteristics (continued)
Line Transient Response
Load Transient Response
Figure 14.
Figure 15.
Ripple Rejection
Low Voltage Behavior
Figure 16.
Figure 17.
Low Voltage Behavior
Low Voltage Behavior
Figure 18.
Figure 19.
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Typical Performance Characteristics (continued)
Low Voltage Behavior
Low Voltage Behavior
Figure 20.
Figure 21.
Low Voltage Behavior
Output at Voltage Extremes
Figure 22.
Figure 23.
Output at Voltage Extremes
Output at Voltage Extremes
Figure 24.
Figure 25.
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Typical Performance Characteristics (continued)
Output at Voltage Extremes
Output at Voltage Extremes
Figure 26.
Figure 27.
Output at Voltage Extremes
Output Capacitor ESR
Figure 28.
Figure 29.
Peak Output Current
Output Impedance
Figure 30.
Figure 31.
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Typical Performance Characteristics (continued)
Maximum Power Dissipation (TO-220)
Maximum Power Dissipation (SOT-223)
Figure 32.
Figure 33.
Maximum Power Dissipation (DDPAK/TO-263)
Figure 34.
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Equivalent Schematic Diagram
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APPLICATION INFORMATION
EXTERNAL CAPACITORS
The output capacitor is critical to maintaining regulator stability, and must meet the required conditions for both
ESR (Equivalent Series Resistance) and minimum amount of capacitance.
MINIMUM CAPACITANCE:
The minimum output capacitance required to maintain stability is 22 μF (this value may be increased without
limit). Larger values of output capacitance will give improved transient response.
ESR LIMITS:
The ESR of the output capacitor will cause loop instability if it is too high or too low. The acceptable range of
ESR plotted versus load current is shown in the graph below. It is essential that the output capacitor meet
these requirements, or oscillations can result.
Figure 35. Output Capacitor ESR Limits
It is important to note that for most capacitors, ESR is specified only at room temperature. However, the designer
must ensure that the ESR will stay inside the limits shown over the entire operating temperature range for the
design.
For aluminum electrolytic capacitors, ESR will increase by about 30X as the temperature is reduced from 25°C to
−40°C. This type of capacitor is not well-suited for low temperature operation.
Solid tantalum capacitors have a more stable ESR over temperature, but are more expensive than aluminum
electrolytics. A cost-effective approach sometimes used is to parallel an aluminum electrolytic with a solid
Tantalum, with the total capacitance split about 75/25% with the Aluminum being the larger value.
If two capacitors are paralleled, the effective ESR is the parallel of the two individual values. The “flatter” ESR of
the Tantalum will keep the effective ESR from rising as quickly at low temperatures.
HEATSINKING
A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of
the application. Under all possible operating conditions, the junction temperature must be within the range
specified under Absolute Maximum Ratings.
To determine if a heatsink is required, the power dissipated by the regulator, PD, must be calculated.
The figure below shows the voltages and currents which are present in the circuit, as well as the formula for
calculating the power dissipated in the regulator:
14
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Product Folder Links: LM2940-N LM2940C
LM2940-N, LM2940C
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SNVS769I –MARCH 2000–REVISED APRIL 2013
IIN = IL + IG
PD = (VIN − VOUT) IL + (VIN) IG
Figure 36. Power Dissipation Diagram
The next parameter which must be calculated is the maximum allowable temperature rise, TR(MAX). This is
calculated by using the formula:
TR(MAX) = TJ(MAX) − TA(MAX)
where
•
•
TJ(MAX) is the maximum allowable junction temperature, which is 125°C for commercial grade parts.
TA(MAX)is the maximum ambient temperature which will be encountered in the application.
(1)
Using the calculated values for TR(MAX) and PD, the maximum allowable value for the junction-to-ambient thermal
resistance, θ(JA), can now be found:
θ(JA) = TR(MAX) / PD
(2)
NOTE
If the maximum allowable value for θ(JA) is found to be ≥ 53°C/W for the TO-220 package,
≥ 80°C/W for the DDPAK/TO-263 package, or ≥ 174°C/W for the SOT-223 package, no
heatsink is needed since the package alone will dissipate enough heat to satisfy these
requirements.
If the calculated value for θ(JA)falls below these limits, a heatsink is required.
HEATSINKING TO-220 PACKAGE PARTS
The TO-220 can be attached to a typical heatsink, or secured to a copper plane on a PC board. If a copper plane
is to be used, the values of θ(JA) will be the same as shown in the next section for the DDPAK/TO-263.
If a manufactured heatsink is to be selected, the value of heatsink-to-ambient thermal resistance, θ(H−A), must
first be calculated:
θ(H−A) = θ(JA) − θ(C−H) − θ(J−C)
where
•
θ(J−C) is defined as the thermal resistance from the junction to the surface of the case. A value of 3°C/W can be
assumed for θ(J−C) for this calculation.
•
θ(C−H) is defined as the thermal resistance between the case and the surface of the heatsink. The value
of θ(C−H) will vary from about 1.5°C/W to about 2.5°C/W (depending on method of attachment, insulator, etc.). If
the exact value is unknown, 2°C/W should be assumed for θ(C−H)
.
(3)
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 the catalog, or shown in a curve that plots
temperature rise vs power dissipation for the heatsink.
HEATSINKING DDPAK/TO-263 PACKAGE PARTS
The DDPAK/TO-263 (KTT) package uses 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 package to the plane.
Figure 37 shows for the DDPAK/TO-263 the measured values of θ(JA) for different copper area sizes using a
typical PCB with 1 ounce copper and no solder mask over the copper area used for heatsinking.
Copyright © 2000–2013, Texas Instruments Incorporated
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LM2940-N, LM2940C
SNVS769I –MARCH 2000–REVISED APRIL 2013
www.ti.com
Figure 37. θ(JA) 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(JA) for the DDPAK/TO-263 package mounted to a PCB is
32°C/W.
As a design aid, Figure 38 shows the maximum allowable power dissipation compared to ambient temperature
for the DDPAK/TO-263 device. This assumes a θ(JA) of 35°C/W for 1 square inch of 1 ounce copper and a
maximum junction temperature (TJ) of 125°C.
Figure 38. Maximum Power Dissipation vs. TA for the DDPAK/TO-263 Package
HEATSINKING SOT-223 PACKAGE PARTS
The 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 package to the plane.
Figure 39 and Figure 40 show the information for the SOT-223 package. Figure 40 assumes a θ(JA) of 74°C/W
for 1 square inch of 1 ounce copper and 51°C/W for 1 square inch of 2 ounce copper, with a maximum ambient
temperature (TA) of 85°C and a maximum junction temperature (TJ) of 125°C.
For techniques for improving the thermal resistance and power dissipation for the SOT-223 package, please
refer to Application Note AN-1028 (SNVA036).
16
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SNVS769I –MARCH 2000–REVISED APRIL 2013
Figure 39. θ(JA) vs. Copper (2 ounce) Area for the SOT-223 Package
Figure 40. Maximum Power Dissipation vs. TA for the SOT-223 Package
HEATSINKING WSON PACKAGE PARTS
The value of θJA for the WSON package is specifically dependent on PCB trace area, trace material, and the
number of layers and thermal vias. It is recommended that a minimum of 6 thermal vias be placed under the
center pad to improve thermal performance.
For techniques for improving the thermal resistance and power dissipation for the WSON package, please refer
to Application Note AN-1187 (SNOA401).
Copyright © 2000–2013, Texas Instruments Incorporated
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17
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LM2940-N, LM2940C
SNVS769I –MARCH 2000–REVISED APRIL 2013
www.ti.com
REVISION HISTORY
Changes from Revision H (April 2013) to Revision I
Page
•
Changed layout of National Data Sheet to TI format .......................................................................................................... 17
18
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Product Folder Links: LM2940-N LM2940C
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
PACKAGING INFORMATION
Orderable Device
LM2940CS-12
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
0 to 125
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
ACTIVE
DDPAK/
TO-263
KTT
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
45
TBD
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
Call TI
Level-3-245C-168 HR
Call TI
LM2940CS
-12 P+
LM2940CS-12/NOPB
LM2940CS-15
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
DDPAK/
TO-263
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
NDE
45
45
Pb-Free (RoHS
Exempt)
LM2940CS
-12 P+
DDPAK/
TO-263
TBD
LM2940CS
-15 P+
LM2940CS-15/NOPB
LM2940CS-5.0
DDPAK/
TO-263
45
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-15 P+
DDPAK/
TO-263
45
TBD
LM2940CS
-5.0 P+
LM2940CS-5.0/NOPB
LM2940CS-9.0
DDPAK/
TO-263
45
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-5.0 P+
DDPAK/
TO-263
45
TBD
LM2940CS
-9.0 P+
LM2940CS-9.0/NOPB
LM2940CSX-12
DDPAK/
TO-263
45
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-9.0 P+
DDPAK/
TO-263
500
500
500
500
500
500
500
500
45
TBD
LM2940CS
-12 P+
LM2940CSX-12/NOPB
LM2940CSX-15
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-12 P+
DDPAK/
TO-263
TBD
LM2940CS
-15 P+
LM2940CSX-15/NOPB
LM2940CSX-5.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-15 P+
DDPAK/
TO-263
TBD
LM2940CS
-5.0 P+
LM2940CSX-5.0/NOPB
LM2940CSX-9.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-5.0 P+
DDPAK/
TO-263
TBD
LM2940CS
-9.0 P+
LM2940CSX-9.0/NOPB
LM2940CT-12
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940CS
-9.0 P+
TO-220
TBD
LM2940CT
-12 P+
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
0 to 125
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
LM2940CT-12/NOPB
LM2940CT-15
ACTIVE
TO-220
TO-220
TO-220
TO-220
TO-220
TO-220
TO-220
TO-220
NDE
3
3
3
3
3
3
3
3
45
Green (RoHS
& no Sb/Br)
CU SN
Call TI
CU SN
Call TI
CU SN
CU SN
Call TI
CU SN
Level-1-NA-UNLIM
LM2940CT
-12 P+
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
NDE
NDE
NDE
NDG
NDE
NDE
NDE
45
45
45
45
45
45
45
TBD
Call TI
0 to 125
LM2940CT
-15 P+
LM2940CT-15/NOPB
LM2940CT-5.0
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
Call TI
0 to 125
LM2940CT
-15 P+
TBD
0 to 125
LM2940CT
-5.0 P+
LM2940CT-5.0/LF01
LM2940CT-5.0/NOPB
LM2940CT-9.0
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Level-1-NA-UNLIM
Call TI
LM2940CT
-5.0 P+
Green (RoHS
& no Sb/Br)
0 to 125
0 to 125
0 to 125
LM2940CT
-5.0 P+
TBD
LM2940CT
-9.0 P+
LM2940CT-9.0/NOPB
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
LM2940CT
-9.0 P+
LM2940IMP-10
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L55B
LM2940IMP-10/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
L55B
LM2940IMP-12
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L56B
L56B
LM2940IMP-12/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940IMP-15
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L70B
L70B
LM2940IMP-15/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940IMP-5.0
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L53B
L53B
LM2940IMP-5.0/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940IMP-9.0
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L0EB
L0EB
LM2940IMP-9.0/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940IMPX-10
ACTIVE
SOT-223
DCY
4
2000
TBD
Call TI
Call TI
-40 to 85
L55B
Addendum-Page 2
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
LM2940IMPX-10/NOPB
ACTIVE
SOT-223
DCY
4
2000
Green (RoHS
& no Sb/Br)
CU SN
Level-1-260C-UNLIM
-40 to 85
L55B
LM2940IMPX-12
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
2000
2000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L56B
L56B
LM2940IMPX-12/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940IMPX-5.0
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
2000
2000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L53B
L53B
LM2940IMPX-5.0/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940IMPX-8.0
ACTIVE
ACTIVE
SOT-223
SOT-223
DCY
DCY
4
4
2000
2000
TBD
Call TI
CU SN
Call TI
-40 to 85
-40 to 85
L54B
L54B
LM2940IMPX-8.0/NOPB
Green (RoHS
& no Sb/Br)
Level-1-260C-UNLIM
LM2940LD-12
ACTIVE
ACTIVE
WSON
WSON
NGN
NGN
8
8
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 125
-40 to 125
L00018B
L00018B
LM2940LD-12/NOPB
Green (RoHS
& no Sb/Br)
Level-3-260C-168 HR
LM2940LD-5.0
ACTIVE
ACTIVE
WSON
WSON
NGN
NGN
8
8
1000
1000
TBD
Call TI
CU SN
Call TI
-40 to 125
-40 to 125
L00014B
L00014B
LM2940LD-5.0/NOPB
Green (RoHS
& no Sb/Br)
Level-3-260C-168 HR
LM2940S-10
LM2940S-10/NOPB
LM2940S-12
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
DDPAK/
TO-263
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
3
3
3
3
3
3
3
3
45
45
45
45
45
45
45
45
TBD
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
Level-3-245C-168 HR
Call TI
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
LM2940S
-10 P+
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
LM2940S
-10 P+
DDPAK/
TO-263
TBD
LM2940S
-12 P+
LM2940S-12/NOPB
LM2940S-5.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-12 P+
DDPAK/
TO-263
TBD
LM2940S
-5.0 P+
LM2940S-5.0/NOPB
LM2940S-8.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-5.0 P+
DDPAK/
TO-263
TBD
LM2940S
-8.0 P+
LM2940S-8.0/NOPB
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
LM2940S
-8.0 P+
Addendum-Page 3
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
LM2940S-9.0
LM2940S-9.0/NOPB
LM2940SX-10
ACTIVE
DDPAK/
TO-263
KTT
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
45
TBD
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
CU SN
Call TI
Level-3-245C-168 HR
Call TI
LM2940S
-9.0 P+
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
DDPAK/
TO-263
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
NDE
NDE
NDE
NDE
NDE
NEB
45
500
500
500
500
500
500
500
500
500
500
45
Pb-Free (RoHS
Exempt)
LM2940S
-9.0 P+
DDPAK/
TO-263
TBD
LM2940S
-10 P+
LM2940SX-10/NOPB
LM2940SX-12
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-10 P+
DDPAK/
TO-263
TBD
LM2940S
-12 P+
LM2940SX-12/NOPB
LM2940SX-5.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-12 P+
DDPAK/
TO-263
TBD
LM2940S
-5.0 P+
LM2940SX-5.0/NOPB
LM2940SX-8.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-5.0 P+
DDPAK/
TO-263
TBD
LM2940S
-8.0 P+
LM2940SX-8.0/NOPB
LM2940SX-9.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-8.0 P+
DDPAK/
TO-263
TBD
LM2940S
-9.0 P+
LM2940SX-9.0/NOPB
LM2940T-10.0
DDPAK/
TO-263
Pb-Free (RoHS
Exempt)
Level-3-245C-168 HR
Call TI
LM2940S
-9.0 P+
TO-220
TO-220
TO-220
TO-220
TO-220
TO-220
TBD
LM2940T
10.0 P+
LM2940T-10.0/NOPB
LM2940T-12.0
45
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
Call TI
LM2940T
10.0 P+
45
TBD
LM2940T
12.0 P+
LM2940T-12.0/NOPB
LM2940T-5.0
45
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
Call TI
LM2940T
12.0 P+
45
TBD
LM2940T
-5.0 P+
LM2940T-5.0/LF08
45
Green (RoHS
& no Sb/Br)
Level-3-245C-168 HR
LM2940T
-5.0 P+
Addendum-Page 4
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
Orderable Device
Status Package Type Package Pins Package
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
-40 to 125
Top-Side Markings
Samples
Drawing
Qty
(1)
(2)
(3)
(4)
LM2940T-5.0/NOPB
LM2940T-8.0
ACTIVE
TO-220
TO-220
TO-220
TO-220
TO-220
NDE
3
3
3
3
3
45
Green (RoHS
& no Sb/Br)
CU SN
Call TI
CU SN
Call TI
CU SN
Level-1-NA-UNLIM
LM2940T
-5.0 P+
ACTIVE
ACTIVE
ACTIVE
ACTIVE
NDE
NDE
NDE
NDE
45
45
45
45
TBD
Call TI
LM2940T
-8.0 P+
LM2940T-8.0/NOPB
LM2940T-9.0
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
Call TI
LM2940T
-8.0 P+
TBD
LM2940T
-9.0 P+
LM2940T-9.0/NOPB
Green (RoHS
& no Sb/Br)
Level-1-NA-UNLIM
LM2940T
-9.0 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)
Multiple Top-Side Markings will be inside parentheses. Only one Top-Side 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 Top-Side Marking for that device.
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.
Addendum-Page 5
PACKAGE OPTION ADDENDUM
www.ti.com
11-Apr-2013
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 6
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)
LM2940CSX-12
DDPAK/
TO-263
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
3
3
3
3
3
3
3
3
500
500
500
500
500
500
500
500
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
24.4
24.4
24.4
24.4
24.4
24.4
24.4
24.4
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
24.0
24.0
24.0
24.0
24.0
24.0
24.0
24.0
Q2
Q2
Q2
Q2
Q2
Q2
Q2
Q2
LM2940CSX-12/NOPB DDPAK/
TO-263
LM2940CSX-15
DDPAK/
TO-263
LM2940CSX-15/NOPB DDPAK/
TO-263
LM2940CSX-5.0
DDPAK/
TO-263
LM2940CSX-5.0/NOPB DDPAK/
TO-263
LM2940CSX-9.0
DDPAK/
TO-263
LM2940CSX-9.0/NOPB DDPAK/
TO-263
LM2940IMP-10
LM2940IMP-10/NOPB SOT-223
LM2940IMP-12 SOT-223
LM2940IMP-12/NOPB SOT-223
SOT-223
DCY
DCY
DCY
DCY
4
4
4
4
1000
1000
1000
1000
330.0
330.0
330.0
330.0
16.4
16.4
16.4
16.4
7.0
7.0
7.0
7.0
7.5
7.5
7.5
7.5
2.2
2.2
2.2
2.2
12.0
12.0
12.0
12.0
16.0
16.0
16.0
16.0
Q3
Q3
Q3
Q3
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
8-Apr-2013
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)
LM2940IMP-15
LM2940IMP-15/NOPB SOT-223
LM2940IMP-5.0 SOT-223
LM2940IMP-5.0/NOPB SOT-223
LM2940IMP-9.0 SOT-223
LM2940IMP-9.0/NOPB SOT-223
LM2940IMPX-10 SOT-223
LM2940IMPX-10/NOPB SOT-223
LM2940IMPX-12 SOT-223
LM2940IMPX-12/NOPB SOT-223
LM2940IMPX-5.0 SOT-223
LM2940IMPX-5.0/NOPB SOT-223
LM2940IMPX-8.0 SOT-223
LM2940IMPX-8.0/NOPB SOT-223
SOT-223
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
NGN
NGN
NGN
NGN
KTT
4
4
4
4
4
4
4
4
4
4
4
4
4
4
8
8
8
8
3
1000
1000
1000
1000
1000
1000
2000
2000
2000
2000
2000
2000
2000
2000
1000
1000
1000
1000
500
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
178.0
178.0
178.0
178.0
330.0
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
16.4
12.4
12.4
12.4
12.4
24.4
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
4.3
4.3
4.3
4.3
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
4.3
4.3
4.3
4.3
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
1.3
1.3
1.3
1.3
5.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
8.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
12.0
12.0
12.0
12.0
24.0
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q3
Q1
Q1
Q1
Q1
Q2
LM2940LD-12
LM2940LD-12/NOPB
LM2940LD-5.0
WSON
WSON
WSON
WSON
8.0
8.0
LM2940LD-5.0/NOPB
LM2940SX-10
8.0
DDPAK/
TO-263
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
10.75 14.85
16.0
LM2940SX-10/NOPB
LM2940SX-12
DDPAK/
TO-263
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
3
3
3
3
3
3
3
3
3
500
500
500
500
500
500
500
500
500
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
330.0
24.4
24.4
24.4
24.4
24.4
24.4
24.4
24.4
24.4
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
24.0
24.0
24.0
24.0
24.0
24.0
24.0
24.0
24.0
Q2
Q2
Q2
Q2
Q2
Q2
Q2
Q2
Q2
DDPAK/
TO-263
LM2940SX-12/NOPB
LM2940SX-5.0
DDPAK/
TO-263
DDPAK/
TO-263
LM2940SX-5.0/NOPB
LM2940SX-8.0
DDPAK/
TO-263
DDPAK/
TO-263
LM2940SX-8.0/NOPB
LM2940SX-9.0
DDPAK/
TO-263
DDPAK/
TO-263
LM2940SX-9.0/NOPB
DDPAK/
TO-263
Pack Materials-Page 2
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)
LM2940CSX-12
LM2940CSX-12/NOPB
LM2940CSX-15
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
SOT-223
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
DCY
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
500
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
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
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
367.0
45.0
45.0
45.0
45.0
45.0
45.0
45.0
45.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
35.0
500
LM2940CSX-15/NOPB
LM2940CSX-5.0
500
500
LM2940CSX-5.0/NOPB
LM2940CSX-9.0
500
500
LM2940CSX-9.0/NOPB
LM2940IMP-10
500
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
2000
2000
LM2940IMP-10/NOPB
LM2940IMP-12
SOT-223
SOT-223
LM2940IMP-12/NOPB
LM2940IMP-15
SOT-223
SOT-223
LM2940IMP-15/NOPB
LM2940IMP-5.0
SOT-223
SOT-223
LM2940IMP-5.0/NOPB
LM2940IMP-9.0
SOT-223
SOT-223
LM2940IMP-9.0/NOPB
LM2940IMPX-10
SOT-223
SOT-223
LM2940IMPX-10/NOPB
SOT-223
Pack Materials-Page 3
PACKAGE MATERIALS INFORMATION
www.ti.com
8-Apr-2013
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
LM2940IMPX-12
LM2940IMPX-12/NOPB
LM2940IMPX-5.0
LM2940IMPX-5.0/NOPB
LM2940IMPX-8.0
LM2940IMPX-8.0/NOPB
LM2940LD-12
SOT-223
SOT-223
DCY
DCY
DCY
DCY
DCY
DCY
NGN
NGN
NGN
NGN
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
KTT
4
4
4
4
4
4
8
8
8
8
3
3
3
3
3
3
3
3
3
3
2000
2000
2000
2000
2000
2000
1000
1000
1000
1000
500
367.0
367.0
367.0
367.0
367.0
367.0
210.0
213.0
210.0
213.0
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
367.0
367.0
367.0
185.0
191.0
185.0
191.0
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
35.0
35.0
35.0
35.0
55.0
35.0
55.0
45.0
45.0
45.0
45.0
45.0
45.0
45.0
45.0
45.0
45.0
SOT-223
SOT-223
SOT-223
SOT-223
WSON
LM2940LD-12/NOPB
LM2940LD-5.0
WSON
WSON
LM2940LD-5.0/NOPB
LM2940SX-10
WSON
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
DDPAK/TO-263
LM2940SX-10/NOPB
LM2940SX-12
500
500
LM2940SX-12/NOPB
LM2940SX-5.0
500
500
LM2940SX-5.0/NOPB
LM2940SX-8.0
500
500
LM2940SX-8.0/NOPB
LM2940SX-9.0
500
500
LM2940SX-9.0/NOPB
500
Pack Materials-Page 4
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
NGN0008A
LDC08A (Rev B)
www.ti.com
MECHANICAL DATA
KTT0003B
TS3B (Rev F)
BOTTOM SIDE OF PACKAGE
www.ti.com
MECHANICAL DATA
NEB0003G
TA03G (Rev A)
www.ti.com
IMPORTANT NOTICE
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