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PDF 317LB Data sheet ( Hoja de datos )
| Número de pieza | 317LB | |
| Descripción | LM317LB | |
| Fabricantes | ON Semiconductor | |
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ON Semiconductort
100 mA Adjustable Output,
Positive Voltage Regulator
The LM317L is an adjustable 3–terminal positive voltage regulator
capable of supplying in excess of 100 mA 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 them essentially blow–out proof.
The LM317L 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 LM317L can be used as a
precision current regulator.
• Output Current in Excess of 100 mA
• Output Adjustable Between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Standard 3–Lead Transistor Package
• Eliminates Stocking Many Fixed Voltages
Simplified Application
Vin
Cin*
0.1µF
LM317L
IAdj
Adjust
R2
Vout
R1
240
+ CO**
1.0µF
www.DataSheet4U.com
LM317L
LOW CURRENT
THREE–TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
Z SUFFIX
PLASTIC PACKAGE
CASE 29
Pin 1. Adjust
2. Vout
3. Vin
1
2
3
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8*)
8
1
Pin 1. Vin
2. Vout
3. Vout
4. Adjust
5. N.C.
6. Vout
7. Vout
8. N.C.
*SOP–8 is an internally modified SO–8 package.
Pins 2, 3, 6 and 7 are electrically common to the
die attach flag. This internal lead frame modifi-
cation decreases package thermal resistance
and increases power dissipation capability
when appropriately mounted on a printed circuit
board. SOP–8 conforms to all external dimen-
sions of the standard SO–8 package.
ă* 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 + 1.25āVā
1
)
R2
R1
) IAdjāāR2
Since IAdj is controlled to less than 100 µA, the error
associated with this term is negligible in most applications.
ORDERING INFORMATION
Operating
Device Temperature Range
Package
LM317LD
LM317LZ
TJ = 0° to +125°C
SOP–8
Plastic
LM317LBD
LM317LBZ TJ = –40° to +125°C
SOP–8
Plastic
© Semiconductor Components Industries, LLC, 2002
January, 2002 – Rev. 3
1
Publication Order Number:
LM317L/D
1 page  
LM317L
www.DataSheet4U.com
0.4 Vin = 45 V
0.2
Vout = 5.0 V
IL = 5.0 mA to 40 mA
0
-0.2
-0.4
Vin = 10 V
Vout = 5.0 V
-0.6 IL = 5.0 mA to 100 mA
-0.8
-1.0
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 5. Load Regulation
80
70
IL = 40 mA
f = 120 Hz
60 Vout = 10 V
Vin = 14 V to 24 V
50
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 6. Ripple Rejection
0.50
TJ = 25°C
0.40
0.30
0.20 TJ = 150°C
0.10
0
0 10 20 30 40 50
Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V)
Figure 7. Current Limit
2.5
2.0
IL = 100 mA
1.5
IL = 5.0 mA
1.0
0.5
-50 -25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Figure 8. Dropout Voltage
5.0
4.5
4.0 TJ = 55°C
3.5
TJ = 25°C
TJ = 150°C
3.0
2.5
2.0
1.5
1.0
0.5
0 10 20 30 40
Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V)
Figure 9. Minimum Operating Current
100
90
80
IL = 40 mA
Vin = 5.0 V ± 1.0 VPP
70 Vout = 1.25 V
60
50
40
30
20
10
10 100 1.0 k 10 k 100 k 1.0 M
f, FREQUENCY (Hz)
Figure 10. Ripple Rejection versus Frequency
http://onsemi.com
5
5 Page 
Notes
LM317L
www.DataSheet4U.com
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 317LB.PDF ] | |
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