©2011 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.3
Features
• Output Current in Excess of 100mA
• Output Adjustable Between 1.2V and 37V
• Internal Thermal Overload Protection
• Internal Short Circui t Current Limiting
• Output Transistor Safe Area Compensation
• Floating Operation For Hig h Voltage Applications
Description
The LM317L is a 3-terminal adjustable posi tive voltage
regulator capable of supplying in excess of 100mA ov er an
output voltage range of 1 .2V to 37V. This voltage regulator
is exceptionally easy to use and requires only two external
resistors to set the output voltage.
TO-92
1. Adj 2. Output 3. Input
1
1
8-SOP
1. Input 2.3.6.7. Output
4. Adj 5.8. NC
Internal Block Diagram
Rlimit
3Vin
Vo
1
Voltage
Reference
Vad
j
2
Protection
Circuitry
+
-
Input
Output
LM317L
3-Terminal 0.1A Positive Adjustable Regulator
LM317L
2
Absolute Maximum Ratings
Electrical Characteristics
(VI - VO = 5V, IO = 40mA, 0°C ≤ TJ ≤ +125°C, PDMAX = 625mW, unless otherwise specified)
Note:
1. Load and Line regulatio n are specified at constant junction tempe rature. Chan ge in VO due to heating effects mu st be taken
into account separately. Pulse testing with low duty cycle is used.
Parameter Symbol Value Unit
Input-Output Voltage Differential VI - VO40 V
Power Dissipation PDInternally limited W
Operating Junction Temperature Range Tj0 ~ +125 °C
Storage Temperature Range TSTG -65 ~ +125 °C
Parameter Symbol Conditions Min. Typ. Max. Unit
Line Regulation (Note1) Rline TA = +25°C
3V ≤ VI − VO ≤ 40V -0.010.04
%/V
3V ≤ VI − VO ≤ 40V - 0.02 0.07
Load Regulation (Note1) Rload
TA = +25°C
10mA ≤ IO ≤100mA
VO ≤ 5V
VO ≥ 5V -
-5
0.1 25
0.5 mV
%/VO
10mA ≤ IO ≤ 100mA
VO ≤ 5V
VO ≥ 5V -
-20
0.3 70
1.5 mV
%/VO
Adjustment Pin Current IADJ --50100μA
Adjustment Pin Curren t Change ΔIADJ 3V ≤ VI - VO ≤ 40V
10mA ≤ IO ≤ 100mA
PD < PDMAX -0.25μA
Reference Volt ag e VREF 3V < VI - VO < 40V
10mA ≤ IO ≤100mA
PD ≤ PDMAX 1.20 1.25 1.30 V
Temperature Stability STT--0.7- %
Minimum Load Current to
Maintain Regulation IL(MIN) VI - VO = 40V - 3.5 10 mA
Maximum Output Current IO(MAX) VI - VO ≤ 15V, PD < PDMAX 100 200 - mA
VI - VO ≤ 40V
PD < PDMAX, TA = +25°C25 50 -
RMS Noise, % of VOUT eNTA = +25°C, 10Hz < f < 10kHz - 0.003 - %/VO
Ripple Rejection RR VO = 10V, f = 120Hz
without CADJ
CADJ = 10uF -
66 65
80 -
-dB
dB
Long-Term Stability ST TJ = +125°C, 1000Hours - 0.3 - %
LM317L
3
Typical Application
Figure 1. 5V Electronic Shu tdo wn Regulator
D1 protects the device during an input short circuit.
Figure 2. Slow Turn-On Regulator
Figure 3. Current Regulator
LM317L
KSP2222
D1
1N4002
INPUT
OUTPUT
1.0uF
+
120
1k TTL CONTROL
MINIMUM V o = 1.25V
VADJ
720
Vo
LM317L
KSP2907
240
50k 1N4001
10uF
+
R2
VADJ
INPUT OUTPUT
Vo
LM317L Vo
VADJ
R2
R1
OUTPUT
INPUT
IADJ
Io
IOMAX VREF
R1
-----------------
⎝⎠
⎛⎞
IADJ 1.25V
R1
----------------
≅+=
IOMIN VREF
R1 R2+
----------------------
⎝⎠
⎛⎞
IADJ 1.25V
R1 R2+
----------------------
≅+=
5mA IO500mA<<
LM317L
4
Mechanical Dimensions
Package
0.46 ±0.10
1.27TYP
(R2.29)
3.86MAX
[1.27 ±0.20]1.27TYP
[1.27 ±0.20]
3.60 ±0.20
14.47 ±0.40
1
.02 ±0.10
(0.25) 4.58 ±0.20
4.58 +0.25
–0.15
0.38 +0.1
0
–0.0
5
0.38 +0.10
–0.05
TO-92
LM317L
5
Mechanical Dimensions (Continued)
Package
8-SOP
4.92
±0.20
0.194
±0.008
0.41
±0.10
0.016
±0.004
1.27
0.050
5.72
0.225
1.55
±0.20
0.061
±0.008
0.1~0.25
0.004~0.001
6.00
±0.30
0.236
±0.012
3.95
±0.20
0.156
±0.008
0.50
±0.20
0.020
±0.008
5.13
0.202 MAX
#1
#4 #5
0~8°
#8
0.56
0.022
()
1.80
0.071
MAX0.10
MAX0.004
MAX
MIN
+
0.10
-0.05
0.15+
0.004
-0.002
0.006
LM317L
10/18/ 11 0.0m 001
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© 2011 Fairchild Semiconductor Corporation
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OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
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1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
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Ordering Information
Product Number Package Operating Temperature
LM317LZ TO-92 0°C to +125°C
LM317LM 8-SOP
