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PDF LM317F3 Data sheet ( Hoja de datos )
| Número de pieza | LM317F3 | |
| Descripción | Three Terminal Adjustable Output Positive Voltage Regulators | |
| Fabricantes | CYStech Electronics | |
| Logotipo |  |
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CYStech Electronics Corp.
Three Terminal Adjustable Output
Positive Voltage Regulators
LM317F3
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 1/11
The LM317F3 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 ex-
ternal resistors to set the output voltage. Further, it employs internal current
limiting, thermal shutdown and safe area compensation, making it essentially
TO-263
blow–out proof.
The LM317F3 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 LM317F3 can be used as a precision current regulator.
● 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
● Eliminates Stocking many Fixed Voltages
Standard Application
Vin PLLM313717
IAdj
+
Cin
0.1μF
R2
Vout
R1
+
Cout
1.0μF
＊Cin is required if regulator is located an appreciate
distance from power supply filter.
＊＊Cout is not needed for stability, however, it does
improve transient response.
Vout=1.25(1+R2/R1)+IAdjR2
Since IAdj is controlled to less than 100 μA, the
error associated with this term is negligible in
most applications.
Maximum Ratings
Rating
Input-Output Voltage Differential
Power Dissipation
TA=25℃
Thermal Resistance, Junction-to-Ambient
Thermal Resistance, Junction-to-Case
Operating Junction Temperature Range
Storage Temperature Range
LM317F3
Symbol
VI-VO
Value
40
Unit
V
PD
θJA
θJC
TOPR
Tstg
Internally Limited
60
3.0
0 to +125
-65 to +150
W
℃/W
℃/W
℃
℃
CYStek Product Specification
http://www.Datasheet4U.com
1 page  
CYStech Electronics Corp.
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 5/11
Load Regulation(mV)=Vo(min load)-Vo(max load)
Vo(min load)-Vo(max load)
Load Regulation(%Vo)=
×100
Vo(min load)
Fig 2. Load Regulation and ∆IAdj/Load test circuit
＊ Pulse testing required.
1% Duty Cycle is suggested.
To calculate R2: Vout=ISETR2+1.250V
Assume ISET=5.25mA
Fig 3. Standard Test Circuit
LM317F3
CYStek Product Specification
5 Page 
CYStech Electronics Corp.
TO-263 Dimension
Spec. No. : C513F3
Issued Date : 2003.05.24
Revised Date :2010.07.22
Page No. : 11/11
AC
2
B
123
I
D
JK
L
E
α1
F
α2
G
H
α3
Marking :
Device name
Date Code
LM317
□□□□
Style : Pin 1.ADJ 2.Vout(TAB) 3.Vin
3-Lead Plastic Surface Mounted Package
CYStek Package Code : F3
DIM
Inches
Min. Max.
A 0.3800 0.4050
Millimeters
Min. Max.
9.65 10.29
DIM
Inches
Min. Max.
I 0.0500 0.0700
*:Typical
Millimeters
Min. Max.
1.27 1.78
B 0.3300 0.3700 8.38
9.40
J
- *0.1000 -
*2.54
C
- 0.0550 -
1.40
D 0.5750 0.6250 14.61 15.88
K 0.0450 0.0550 1.14
L 0.0200 0.0390 0.51
1.40
0.99
E 0.1600 0.1900 4.06 4.83 α1
F 0.0450 0.0550 1.14 1.40 α2
G 0.0900 0.1100 2.29 2.79 α3
H 0.0180 0.0290 0.46
0.74
-
-
-
- 6° 8°
- 6° 8°
- 0° 5°
Notes : 1.Controlling dimension : millimeters.
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material :
• Lead : Pure tin plated.
• Mold Compound : Epoxy resin family, flammability solid burning class:UL94V-0
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
• CYStek reserves the right to make changes to its products without notice.
• CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
• CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
LM317F3
CYStek Product Specification
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LM317F3.PDF ] | |
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