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PDF LM317 Data sheet ( Hoja de datos )
| Número de pieza | LM317 | |
| Descripción | THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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 1. Positive Adjustable Regulator - Linear  Hay una vista previa y un enlace de descarga de LM317 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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LM317, NCV317
1.5 A Adjustable Output,
Positive Voltage Regulator
The LM317 is an adjustable 3−terminal positive voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
1.2 V to 37 V. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it
employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blow−out proof.
The LM317 serves a wide variety of applications including local, on
card regulation. This device can also be used to make a programmable
output regulator, or by connecting a fixed resistor between the
adjustment and output, the LM317 can be used as a precision current
regulator.
Features
Output Current in Excess of 1.5 A
Output Adjustable between 1.2 V and 37 V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting Constant with Temperature
Output Transistor Safe−Area Compensation
Floating Operation for High Voltage Applications
Available in Surface Mount D2PAK−3, and Standard 3−Lead
Transistor Package
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
Eliminates Stocking many Fixed Voltages
These are Pb−Free Devices
Vin
Cin*
0.1 mF
LM317
IAdj Adjust
R2
Vout
R1
240
+ CO**
1.0 mF
http://onsemi.com
12
3
D2PAK−3
D2T SUFFIX
CASE 936
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
TO−220
T SUFFIX
CASE 221AB
1
2
3
Pin 1. Adjust
2. Vout
3. Vin
Heatsink surface connected to Pin 2.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 10 of this data sheet.
** Cin is required if regulator is located an appreciable distance from power supply filter.
** CO is not needed for stability, however, it does improve transient response.
ǒ ǓVout + 1.25 V
1
)
R2
R1
) IAdj R2
Since IAdj is controlled to less than 100 mA, the error associated with this term is
negligible in most applications.
Figure 1. Standard Application
Semiconductor Components Industries, LLC, 2013
April, 2013 − Rev. 13
1
Publication Order Number:
LM317/D
1 page  
LM317, NCV317
0.4
0.2
0
-0.2
-0.4
-0.6
Vin = 15 V
Vout = 10 V
-0.8
IL = 0.5 A
IL = 1.5 A
-1.0
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (C)
Figure 7. Load Regulation
4.0
3.0
TJ = 25C
2.0
150C
1.0
-55C
0
0 10 20 30 40
Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
Figure 8. Current Limit
70
65
60
55
50
45
40
35
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (C)
Figure 9. Adjustment Pin Current
3.0
DVout = 100 mV
2.5
IL = 1.5 A
1.0 A
2.0
500 mA
1.5
200 mA
20 mA
1.0
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (C)
Figure 10. Dropout Voltage
1.26
1.25
1.24
1.23
1.22
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (C)
Figure 11. Temperature Stability
5.0
4.5
TJ = -55C
4.0
+25C
3.5
+150C
3.0
2.5
2.0
1.5
1.0
0.5
0
0 10 20 30 40
Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
Figure 12. Minimum Operating Current
http://onsemi.com
5
5 Page 
LM317, NCV317
PACKAGE DIMENSIONS
K
B
A
12 3
C
OPTIONAL
CHAMFER
S
H DETAIL C
D2PAK−3
D2T SUFFIX
CASE 936−03
ISSUE D
T
TERMINAL 4
C
ED
U OPTIONAL
CHAMFER
V
DETAIL C
T
ES
J
F
G
2X D
SIDE VIEW
DUAL GAUGE
CONSTRUCTION
TOP VIEW 0.010 (0.254) M T
BOTTOM VIEW
SIDE VIEW
SINGLE GAUGE
CONSTRUCTION
N
R
MT
PL
DETAIL C
SEATING
PLANE
BOTTOM VIEW
OPTIONAL CONSTRUCTIONS
SOLDERING FOOTPRINT*
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCHES.
3. TAB CONTOUR OPTIONAL WITHIN
DIMENSIONS A AND K.
4. DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 4.
5. DIMENSIONS A AND B DO NOT INCLUDE
MOLD FLASH OR GATE PROTRUSIONS. MOLD
FLASH AND GATE PROTRUSIONS NOT TO
EXCEED 0.025 (0.635) MAXIMUM.
6. SINGLE GAUGE DESIGN WILL BE SHIPPED
AFTER FPCN EXPIRATION IN OCTOBER 2011.
INCHES
MILLIMETERS
DIM MIN MAX MIN MAX
A 0.386 0.403 9.804 10.236
B 0.356 0.368 9.042 9.347
C 0.170 0.180 4.318 4.572
D 0.026 0.036 0.660 0.914
ED 0.045 0.055
ES 0.018 0.026
F 0.051 REF
1.143 1.397
0.457 0.660
1.295 REF
G 0.100 BSC
2.540 BSC
H 0.539 0.579 13.691 14.707
J 0.125 MAX
3.175 MAX
K 0.050 REF
1.270 REF
L 0.000 0.010 0.000 0.254
M 0.088 0.102 2.235 2.591
N 0.018 0.026 0.457 0.660
P 0.058 0.078 1.473 1.981
R 5_ REF
5_ REF
S 0.116 REF
2.946 REF
U 0.200 MIN
5.080 MIN
V 0.250 MIN
6.350 MIN
10.49
16.155
8.38
2X
1.016
2X
3.504
5.080
PITCH
DIMENSIONS: MILLIMETERS
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LM317.PDF ] | |
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