This is information on a product in full production.
September 2015 DocID2168 Rev 7 1/23
LM217L, LM317L
Low current 1.2 to 37 V adjustable voltage regulators
Datasheet
-
production data
Features
•Outuput voltage range: 1.2 to 37 V
•Output current up to 100 mA
•Line regulation typ. 0.01%
•Load regulation typ. 0.1%
•Thermal overload protection
•Short-circuit protection
•Output transition safe area compensation
•Floating operation for high voltage applications
Description
The LM217L/LM317L are monolithic integrated
circuits in SO-8 and TO-92 packages intended for
use as positive adjustable voltage regulators.
They are designed to supply up to 100 mA of load
current with an output voltage adjustable over a
1.2 to 37 V range.The nominal output voltage is
selected by means of only a resistive divider,
making the device exceptionally easy to use and
eliminating the stocking of many fixed regulators.
SO-8
TO-92 TO-92
Tape and reel
Bag
Ammopack
Table 1. Device summary
Order codes
SO-8 (tape and reel) TO-92 (Bag) TO-92 (Ammopack) TO-92 (tape and reel)
LM217LD13TR LM217LZ-TR
LM317LD13TR LM317LZ LM317LZ-AP LM317LZ-TR
www.st.com
Contents LM217L, LM317L
2/23 DocID2168 Rev 7
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1 T O-92 Bag pac kage information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.2 T O-92 Ammopack package information . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.3 TO-92 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.4 SO-8 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.5 SO-8 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DocID2168 Rev 7 3/23
LM217L, LM317L Diagram
23
1 Diagram
Figure 1. Schematic diag ram
Pin configur at ion LM217L, LM 317 L
4/23 DocID2168 Rev 7
2 Pin configuration
Figure 2. Pin connections (top view for SO-8, bottom view for TO-92)
TO-92
SO-8
PIN 1 = ADJUST
PIN 2 = IN
PIN 3 = OUT
DocID2168 Rev 7 5/23
LM217L, LM317L Maximum ratings
23
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
-V
O
Input-output differential voltage 40 V
P
D
Power dissipation Internally limited mW
T
OP
Operating junction temperature range for LM217L -40 to 125 °C
for LM317L 0 to 125
T
STG
Storage temperature range -55 to 150 °C
Table 3. Thermal data
Symbol Parameter SO-8 TO-92 Unit
RthJC Thermal resistance junction-case (max) 20 °C/W
RthJA Thermal res istance jun cti on-a mb ie nt (max) 55
(1)(2)
200
1. Considering 6 cm² of copper Board heat-sink.
2. Our SO-8 package used for voltage regulators is modified internally to have pins 2, 3, 6 and 7 electrically communed to the
die attach flag. This particular frame decreases the total thermal resistance of the package and increases its ability to
dissipate power when an appropriate area of copper on the printed circuit board is available for heat-sinking. The external
dimensions are the same as for the standard SO-8.
Figure 3. Test circuit
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Electrical characteristics LM217L, LM317L
6/23 DocID2168 Rev 7
4 Electrical characteristics
(Refer to the test circuits, T
J
= - 40 to 125°C, V
I
- V
O
= 5 V, I
O
= 40 mA, unless otherwise
specified) Table 4. Electrical characteristics of LM217L
Symbol Parameter Test conditions Min. Typ. Max. Unit
∆
V
O
Line regulation V
I
- V
O
= 3 to 40 V, I
O
= 20 mA T
J
= 25°C 0.01 0.02 %/V
0.02 0.05
∆
V
O
Load regulation
V
O
≤ 5 V, I
O
= 5 to 100 mA T
J
= 25°C 5 15 mV
20 50
V
O
≥ 5 V, I
O
= 5 to 100 mA T
J
= 25°C 0.1 0.3 %
0.3 1
I
ADJ
Adjustment pin current 50 100 µA
∆
I
ADJ
Adjustment pin current V
I
- V
O
= 3 to 40 V, I
O
= 5 to 100 mA
P
d
< 625 mW 0.2 5 µA
V
REF
Reference voltage V
I
- V
O
= 3 to 40 V, I
O
= 10 to 100 mA
P
d
< 625 mW 1.2 1.25 1.3 V
∆
V
O
/V
O
Output volt age tempe rature
stability 0.7 %
I
O(min)
Minimum load current V
I
- V
O
= 40 V 3.5 5 mA
I
O(max)
Maximum output current V
I
- V
O
= 3 to 13 V 100 200 mA
V
I
- V
O
= 40 V 50
eN Output noise voltage B = 10 Hz to 10 KHz, T
J
= 25°C 0.003 %
SVR Supply voltage rejection
(1)
T
J
= 25°C
f = 120 Hz C
ADJ
= 0 65 dB
C
ADJ
= 10 µF 66 80
1. C
ADJ
is connected between adjust pin and ground.
DocID2168 Rev 7 7/23
LM217L, LM317L Electrical characteristics
23
(Refer to the test circuits, T
J
= 0 to 125°C, V
I
- V
O
= 5 V, I
O
= 40 mA, unless otherwise
specified)
Table 5. Electrical characteristics of LM317L
Symb ol Parame ter Test condition s Min. Typ. Max. Unit
∆
V
O
Line regulation V
I
- V
O
= 3 to 40 V, I
O
= 20 mA T
J
= 25°C 0.01 0.04 %/V
0.02 0.07
∆
V
O
Load regulation
V
O
≤ 5 V, I
O
= 5 to 100 mA T
J
= 25°C 5 25 mV
20 70
V
O
≥ 5 V, I
O
= 5 to 100 mA T
J
= 25°C 0.1 0.5 %
0.3 1.5
I
ADJ
Adjustment pin current 50 100 µA
∆
I
ADJ
Adjustment pin current V
I
- V
O
= 3 to 40 V, I
O
= 5 to 100 mA
P
d
< 625 mW 0.2 5 µA
V
REF
Reference voltage V
I
- V
O
= 3 to 40 V, I
O
= 5 to 100 mA
P
d
< 625 mW 1.2 1.25 1.3 V
∆
V
O
/V
O
Output vol tage
temperature sta bi lity 0.7 %
I
O(min)
Minimum load current V
I
- V
O
= 40 V 3.5 5 mA
I
O(max)
Maximum outp ut current V
I
- V
O
= 3 to 13 V 100 200 mA
V
I
- V
O
= 40 V 50
eN Output noise voltage B = 10 Hz to 10 KHz, T
J
= 25°C 0.003 %
SVR Su pply vo ltag e rejecti on
(1)
T
J
= 25°C
f = 120 Hz C
ADJ
= 0 65 dB
C
ADJ
= 10 µF 66 80
1. C
ADJ
is connected between adjust pin and ground.
Typical performance LM217L, LM317L
8/23 DocID2168 Rev 7
5 Typical performance
Figure 4. Current limit Figure 5. Minimum operating current
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DocID2168 Rev 7 9/23
LM217L, LM317L Application information
23
6 Application information
The LM317L provides an internal reference voltage of 1.25 V between the output and
adjustments terminals. This is used to set a constant current flow across an external resistor
divider (see Figure 6 .), giving an output voltage V
O
of:
V
O
= V
REF
(1 + R
2
/R
1
) + I
ADJ
R
2
The device was designed to minimize the term I
ADJ
(100 µA max) and to maintain it very
constant with line and load changes. Usually, the error term I
ADJ
× R
2
can be neglected. To
obtain the previous requirement, all the regulator quiescent current is returned to the output
terminal, imposing a minimum load current condition. If the load is insufficient, the output
voltage will rise.
Since the LM317L is a floating regulator and "sees" only the input-to-output differential
voltage, supplies of very high voltage with respect to ground can be regulated as regulator
as the maximum input-to-output differential is not exceeded. Furthermore, programmable
regulators are easily obtainable and, by connecting a fixed resistor between the adjustment
and output, the device can be used as a precision current regulator . In order to optimize the
load regulation, the current set resistor R
1
(see Figure 6.) should be tied as close as
possible to the regulator, while the ground terminal of R
2
should be near the ground of the
load to provide remote ground sensing.
Application circuits LM217L, LM317L
10/23 DocID2168 Rev 7
7 Application circuits
Figure 6. Basic adjustable regulator
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Figure 7. Voltage regulator with protection diodes
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Figure 8. Slow turn-on 15 V regulator
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DocID2168 Rev 7 11/23
LM217L, LM317L Application circuits
23
Figure 9. Current regulator
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Figure 11. Digitally selected outputs
Package information LM217L, LM317L
12/23 DocID2168 Rev 7
8 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
is an ST trademark.
8.1 TO-92 Bag package information
Figure 12. TO-92 Bag package outline
0102782 D
DocID2168 Rev 7 13/23
LM217L, LM317L Package information
23
8.2 TO-92 Ammopack package information
Figure 13. TO-92 Ammopack package outline
Table 6. TO-92 Bag mechanical data
Dim. mm
Min. Typ. Max.
A 4.32 4.95
b 0.36 0.51
D 4.45 4.95
E 3.30 3.94
e 2.41 2.67
e1 1.14 1.40
L 12.70 15.49
R 2.16 2.41
S1 0.92 1.52
W 0.41 0.56
V5°
W
W1
W0
W2
A
1
d
D0
H1
H
H0
L
l1
F1 F2
P2
P0
delta H
T2 T1
T
t
F3
H3
0050910S_Rev_U
W
W1
W0
W2
A
1
d
D0
H1
H
H0
L
l1
F1 F2
P2
P0
delta H
T2 T1
T
t
F3
H3
0050910S_Rev_U
Package information LM217L, LM317L
14/23 DocID2168 Rev 7
Table 7. TO-92 Ammopack mechanical data
Dim. mm
Min. Typ. Max.
A1 4.80
T3.80
T1 1.60
T2 2.30
d 0.45 0.47 0.48
P0 12.50 12.70 12.90
P2 5.65 6.35 7.05
F1, F2 2.40 2.50 2.94
F3 4.98 5.08 5.48
delta H -2.00 2.00
W 17.50 18.00 19.00
W05.56.006.5
W1 8.50 9.00 9.25
W2 0.50
H 18.50 21
H3 0.5 1 2
H0 15.50 16.00 18.8
H1 25.0 27.0
D0 3.80 4.00 4.20
t0.90
L11.00
l1 3.00
delta P -1.00 1.00
DocID2168 Rev 7 15/23
LM217L, LM317L Package information
23
8.3 TO-92 packing information
Figure 14. TO-92 tape and reel outline
W
W1
W0
W2
A1
d
D0
H1
H
H0
L
l1
F1 F2
P2
P0
delta P
T2 T1
delta H
T
t
Package information LM217L, LM317L
16/23 DocID2168 Rev 7
Table 8. TO-92 tape and reel mechanical data
Dim. mm
Min. Typ. Max.
A1 4.80
T3.80
T1 1.60
T2 2.30
d 0.45 0.47 0.48
P0 12.50 12.70 12.90
P2 5.65 6.35 7.05
F1, F2 2.40 2.50 2.94
F3 4.98 5.08 5.48
delta H -2.00 2.00
W 17.50 18.00 19.00
W05.56.006.5
W1 8.50 9.00 9.25
W2 0.50
H 18.50 21
H3 0.5 1 2
H0 15.50 16.00 18.8
H1 25.0 27.0
D0 3.80 4.00 4.20
t0.90
L11.00
l1 3.00
delta P -1.00 1.00
Ø1 352 355 358
Ø2 28 30 32
u444750
DocID2168 Rev 7 17/23
LM217L, LM317L Package information
23
8.4 SO-8 package information
Figure 15. SO-8 package outline
0016023_G_FU
Package information LM217L, LM317L
18/23 DocID2168 Rev 7
Table 9. SO-8 mechanical data
Dim. mm
Min. Typ. Max.
A1.75
A1 0.10 0.25
A2 1.25
b 0.31 0.51
b1 0.28 0.48
c 0.10 0.25
c1 0.10 0.23
D 4.80 4.90 5.00
E 5.80 6.00 6.20
E1 3.80 3.90 4.00
e1.27
h 0.25 0.50
L 0.40 1.27
L1 1.04
L2 0.25
k0° 8°
ccc 0.10
DocID2168 Rev 7 19/23
LM217L, LM317L Package information
23
Figure 16. SO-8 recommended footprint
Footprint_0016023_G_FU
Package information LM217L, LM317L
20/23 DocID2168 Rev 7
8.5 SO-8 packing information
Figure 17. SO-8 tape and reel outline
DocID2168 Rev 7 21/23
LM217L, LM317L Package information
23
Table 10. SO-8 tape and reel mechanical data
Dim. mm
Min. Typ. Max.
A330
C 12.8 13.2
D20.2
N60
T22.4
Ao 8.1 8.5
Bo 5.5 5.9
Ko 2.1 2.3
Po 3.9 4.1
P7.9 8.1
Revision history LM217L, LM317L
22/23 DocID2168 Rev 7
9 Revision history
Table 11. Revision history
Date Revision Changes
16-Mar-2005 2 Add Tape & reel for TO-92.
23-Dec-2005 3 Mistake on ordering table in header.
18-May-2007 4 Order codes has been updated and the document has been reformatted.
20-May-2014 5
Added TO-92 Ammopack package.
Updated Section 6: Application information and Section 8: Package
information.
Added Section 8.5: SO-8 packing information.
Minor text changes.
19-May-2015 6
Updated the features in cover page, Table 4: Electrical characteristics of
LM217L, Table 5: Electrical characteristics of LM317L and Figure 4: Curren t
limit.
Added Table 3: Thermal data.
Minor text changes.
17-Sep-2015 7 Updated Table 1: D evi ce su mm ary .
Minor text changes.
DocID2168 Rev 7 23/23
LM217L, LM317L
23
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