LM317L, NCV317L
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.
Features
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LOW CURRENT
THREE−TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE 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
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
•
These are Pb−Free Devices
Simplified Application
V
in
LM317L
R
1
240
I
Adj
C
in
*
0.1mF
Adjust
+ C **
O
1.0mF
V
out
8
1
SOIC−8
D SUFFIX
CASE 751
Pin 1.
2.
3.
4.
5.
6.
7.
8.
V
in
V
out
V
out
Adjust
N.C.
V
out
V
out
N.C.
3
STRAIGHT LEAD
BULK PACK
TO−92
Z SUFFIX
CASE 29
12
1
3
BENT LEAD
TAPE & REEL
AMMO PACK
Pin 1. Adjust
2. V
out
3. V
in
2
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
R
2
* C
in
is required if regulator is located an appreciable
**
distance from power supply filter.
** C
O
is not needed for stability, however,
**
it does improve transient response.
R
Vout
+
1.25 V 1
)
2
)
IAdj R2
R1
Since I
Adj
is controlled to less than 100
mA,
the error
associated with this term is negligible in most applications.
©
Semiconductor Components Industries, LLC, 2013
1
May, 2017 − Rev. 13
Publication Order Number:
LM317L/D
LM317L, NCV317L
MAXIMUM RATINGS
Rating
Input−Output Voltage Differential
Power Dissipation
Case 29 (TO−92)
T
A
= 25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Case 751 (SOIC−8) (Note 1)
T
A
= 25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Maximum Junction Temperature
Storage Temperature Range
Symbol
V
I
−V
O
Value
40
Unit
Vdc
P
D
R
qJA
R
qJC
Internally Limited
160
83
W
°C/W
°C/W
P
D
R
qJA
R
qJC
T
JMAX
T
stg
Internally Limited
180
45
+150
−65 to +150
W
°C/W
°C/W
°C
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. SOIC−8 Junction−to−Ambient Thermal Resistance is for minimum recommended pad size. Refer to Figure 24 for Thermal Resistance
variation versus pad size.
2. This device series contains ESD protection and exceeds the following tests:
Human Body Model, 2000 V per MIL STD 883, Method 3015.
Machine Model Method, 200 V.
V
in
300
300
300
3.0k
300
70
6.8V
6.8V
350
18k
8.67k
130
5.1k
200k
500
400
6.3V
180 180
2.0k
6.0k
10
p 10
F p
F
60
2.5
V
out
2.4k
12.8k
50
Adjust
Figure 1. Representative Schematic Diagram
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2
LM317L, NCV317L
ELECTRICAL CHARACTERISTICS
(V
I
−V
O
= 5.0 V; I
O
= 40 mA; T
J
= T
low
to T
high
(Note 3); I
max
and P
max
(Note 4); unless otherwise noted.)
LM317L, LB, NCV317LB
Characteristics
Line Regulation (Note 5)
T
A
= 25°C, 3.0 V
≤
V
I
− V
O
≤
40 V
Load Regulation (Note 5), T
A
= 25°C
10 mA
≤
I
O
≤
I
max
− LM317L
V
O
≤
5.0 V
V
O
≥
5.0 V
Adjustment Pin Current
Adjustment Pin Current Change
2.5 V
≤
V
I
− V
O
≤
40 V, P
D
≤
P
max
10 mA
≤
I
O
≤
I
max
− LM317L
Reference Voltage
3.0 V
≤
V
I
− V
O
≤
40 V, P
D
≤
P
max
10 mA
≤
I
O
≤
I
max
− LM317L
Line Regulation (Note 5), 3.0 V
≤
V
I
− V
O
≤
40 V
Load Regulation (Note 5)
10 mA
≤
I
O
≤
I
max
− LM317L
V
O
≤
5.0 V
V
O
≥
5.0 V
Temperature Stability (T
low
≤
T
J
≤
T
high
)
Minimum Load Current to Maintain Regulation (V
I
− V
O
= 40 V)
Maximum Output Current
V
I
− V
O
≤
6.25 V, P
D
≤
P
max
, Z Package
V
I
− V
O
≤
40 V, P
D
≤
P
max
, T
A
= 25°C, Z Package
RMS Noise, % of V
O
T
A
= 25°C, 10 Hz
≤
f
≤
10 kHz
Ripple Rejection (Note 6)
V
O
= 1.2 V, f = 120 Hz
C
Adj
= 10
mF,
V
O
= 10.0 V
Thermal Shutdown (Note 7)
Long Term Stability, T
J
= T
high
(Note 8)
T
A
= 25°C for Endpoint Measurements
3.
4.
5.
Figure
1
2
Symbol
Reg
line
Reg
load
−
−
3
1, 2
I
Adj
DI
Adj
−
−
5.0
0.1
50
0.2
25
0.5
100
5.0
mV
% V
O
mA
mA
Min
−
Typ
0.01
Max
0.04
Unit
%/V
3
V
ref
1.20
1.25
1.30
V
1
2
Reg
line
Reg
load
−
0.02
0.07
%/V
−
−
3
3
3
T
S
I
Lmin
I
max
100
−
−
4
N
RR
60
−
−
3
−
S
−
−
−
−
−
20
0.3
0.7
3.5
200
20
0.003
70
1.5
−
10
−
−
−
mV
% V
O
% V
O
mA
mA
% V
O
dB
80
80
180
0.3
−
−
−
1.0
°C
%/1.0 k
Hrs.
T
low
to T
high
= 0° to +125°C for LM317L
−40° to +125°C for LM317LB, NCV317LB
P
max
= 625 mW
I
max
= 100 mA
Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
6. C
Adj
, when used, is connected between the adjustment pin and ground.
7. Thermal characteristics are not subject to production test.
8. Since Long−Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average
stability from lot to lot.
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3
LM317L, NCV317L
V
CC
Line Regulation (%/V) =
*
V
IH
V
IL
V
in
LM317L
V
out
V
OH
- V
OL
V
OL
x 100
V
OH
V
OL
Adjust
C
in
0.1mF
I
Adj
R
1
240
1%
C
O
R
L
+
1mF
* Pulse Testing Required:
1% Duty Cycle is suggested.
R2
1
%
Figure 2. Line Regulation and
DI
Adj
/Line Test Circuit
Load Regulation (mV) = V
O
(min Load) -V
O
(max Load)
V
O
(min Load) - V
O
(max Load)
Load Regulation (% V
O
) =
V
O
(min Load)
V
in
*
V
in
LM317L
V
out
I
L
X
100
V
O
(min Load)
V
O
(max Load)
Adjust
C
in
0.1mF
I
Adj
R
1
240
1%
+
C
O
1.0mF
R
L
(max Load)
*
R
L
(min Load)
* Pulse Testing Required:
1% Duty Cycle is suggested.
R
2
1%
Figure 3. Load Regulation and
DI
Adj
/Load
Test Circuit
V
in
V
out
LM317L
I
L
Adjust
R
1
I
Adj
V
I
C
in
0.1mF
I
SET
Pulse Testing Required:
1% Duty Cycle is suggested.
R
2
1%
240
1%
V
ref
+
C
O
1mF
R
L
V
O
To Calculate R
2
:
V
out
= I
SET
R
2
+ 1.250 V
Assume I
SET
= 5.25 mA
Figure 4. Standard Test Circuit
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4
LM317L, NCV317L
14.30V
4.30V
f = 120 Hz
V
in
LM317L
V
out
V
out
= 1.25 V
Adjust
C
in
0.1mF
R
1
240
1%
D
1
*
1N4002
+
C
O
1mF
R
L
V
O
R
2
1.65K
1%
+
**
10mF
* D
1
Discharges C
Adj
if Output is Shorted to Ground.
**C
Adj
provides an AC ground to the adjust pin.
Figure 5. Ripple Rejection Test Circuit
Δ
V out, OUTPUT VOLTAGE CHANGE (%)
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-50
-25
RR, RIPPLE REJECTION (dB)
V
in
= 45 V
V
out
= 5.0 V
I
L
= 5.0 mA to 40 mA
80
70
I
L
= 40 mA
f = 120 Hz
V
out
= 10 V
V
in
= 14 V to 24 V
V
in
= 10 V
V
out
= 5.0 V
I
L
= 5.0 mA to 100 mA
60
50
0
25
50
75
100 125
T
J
, JUNCTION TEMPERATURE (°C)
150
-50
-25
0
25
50
75
100 125
T
J
, JUNCTION TEMPERATURE (°C)
150
Figure 6. Load Regulation
Figure 7. Ripple Rejection
0.50
T
J
= 25°C
IO, OUTPUT CURRENT (A)
0.40
0.30
0.20
0.10
0
T
J
= 150°C
V in -Vout , INPUT-OUTPUT VOLTAGE
DIFFERENTIAL (V)
2.5
2.0
I
L
= 100 mA
1.5
I
L
= 5.0 mA
1.0
0
10
20
30
40
V
in
-V
out
, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V)
50
0.5
-50
-25
0
25
50
75
100 125
T
J
, JUNCTION TEMPERATURE (°C)
150
Figure 8. Current Limit
Figure 9. Dropout Voltage
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