November 2011 Doc ID 2154 Rev 17 1/25
25
LM117
LM217, LM317
1.2 V to 37 V adjustable voltage regulators
Features
Output voltage range: 1.2 to 37 V
Output current in excess of 1.5 A
0.1 % line and load regulation
Floating operation for high voltages
Complete series of protections: current limiting,
thermal shutdown and SOA control
Description
The LM117, LM217, LM317 are monolithic
integrated circuits in TO-220, TO-220FP, TO-3
and D²PAK packages intended for use as positive
adjustable voltage regulators. They are designed
to supply more than 1.5 A 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.
TO-220FP
D²PAK
TO-220
TO-3
Table 1. Device summary
Order codes
TO-220 D²PAK (tape and reel) TO-220FP TO-3
LM117K
LM217T LM217D2T-TR LM217K
LM317T LM317T-DG (1) LM317D2T-TR LM317P LM317K
1. TO-220 Dual Gauge frame.
www.st.com
Contents LM117, LM217, LM317
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Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
LM117, LM217, LM317 Pin configuration
Doc ID 2154 Rev 17 3/25
1 Pin configuration
Figure 1. Pin connections (top view)
TO-220FP
TO-3
TO-220
D²PAK (Any Type)
Maximum ratings LM117, LM217, LM317
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2 Maximum ratings
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
VI - VOInput-reference differential voltage 40 V
IOOutput current Internally limited
TOP Operating junction temperature for:
LM117 - 55 to 150
°CLM217 - 25 to 150
LM317 0 to 125
PDPower dissipation Internally limited
TSTG Storage temperature - 65 to 150 °C
Table 3. Thermal data
Symbol Parameter D²PAK TO-220 TO-220FP TO-3 Unit
RthJC Thermal resistance junction-case 3 5 5 4 °C/W
RthJA Thermal resistance junction-ambient 62.5 50 60 35 °C/W
LM117, LM217, LM317 Diagram
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3 Diagram
Figure 2. Schematic diagram
Electrical characteristics LM117, LM217, LM317
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4 Electrical characteristics
VI - VO = 5 V, IO = 500 mA, IMAX = 1.5 A and PMAX = 20 W, TJ = - 55 to 150 °C for LM117,
TJ = - 25 to 150 °C for LM217, unless otherwise specified.
Table 4. Electrical characteristics for LM117/LM217
Symbol Parameter Test conditions Min. Typ. Max. Unit
ΔVOLine regulation VI - VO = 3 to 40 V TJ = 25°C 0.01 0.02 %/V
0.02 0.05
ΔVOLoad regulation
VO 5 V
IO = 10 mA to IMAX
TJ = 25°C 5 15 mV
20 50
VO 5 V,
IO = 10 mA to IMAX
TJ = 25°C 0.1 0.3 %
0.3 1
IADJ Adjustment pin current 50 100 µA
ΔIADJ Adjustment pin current VI - VO = 2.5 to 40V IO = 10 mA to IMAX 0.2 5 µA
VREF
Reference voltage
(between pin 3 and pin 1)
VI - VO = 2.5 to 40V IO= 10 mA to IMAX
PD PMAX
1.2 1.25 1.3 V
ΔVO/VO
Output voltage
temperature stability 1%
IO(min) Minimum load current VI - VO = 40 V 3.5 5 mA
IO(max) Maximum load current VI - VO 15 V, PD < PMAX 1.5 2.2 A
VI - VO = 40 V, PD < PMAX, TJ = 25°C 0.4
eN Output noise voltage
(percentage of VO)B = 10Hz to 100kHz, TJ = 25°C 0.003 %
SVR Supply voltage rejection (1) TJ = 25°C, f = 120Hz CADJ=0 65 dB
CADJ=10µF 66 80
1. CADJ is connected between pin 1 and ground.
LM117, LM217, LM317 Electrical characteristics
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VI - VO = 5 V, IO = 500 mA, IMAX = 1.5 A and PMAX = 20 W, TJ = 0 to 125°C, unless otherwise
specified.
Table 5. Electrical characteristics for LM317
Symbol Parameter Test conditions Min. Typ. Max. Unit
ΔVOLine regulation VI - VO = 3 to 40 V TJ = 25°C 0.01 0.04 %/V
0.02 0.07
ΔVOLoad regulation
VO 5 V
IO = 10 mA to IMAX
TJ = 25°C 5 25 mV
20 70
VO 5 V,
IO = 10 mA to IMAX
TJ = 25°C 0.1 0.5 %
0.3 1.5
IADJ Adjustment pin current 50 100 µA
ΔIADJ Adjustment pin current VI - VO = 2.5 to 40V,
IO = 10 mA to 500mA 0.2 5 µA
VREF
Reference voltage
(between pin 3 and pin 1)
VI - VO = 2.5 to 40V IO = 10 mA to 500mA
PD PMAX
1.21.251.3 V
ΔVO/VO
Output voltage
temperature stability 1%
IO(min) Minimum load current VI - VO = 40 V 3.5 10 mA
IO(max) Maximum load current VI - VO 15 V, PD < PMAX 1.5 2.2 A
VI - VO = 40 V, PD < PMAX, TJ = 25°C 0.4
eN Output noise voltage
(percentage of VO)B = 10Hz to 100kHz, TJ = 25°C 0.003 %
SVR Supply voltage rejection (1) TJ = 25°C, f = 120Hz CADJ=0 65 dB
CADJ=10µF 66 80
1. CADJ is connected between pin 1 and ground.
Typical characteristics LM117, LM217, LM317
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5 Typical characteristics
Figure 3. Output current vs. input-output
differential voltage
Figure 4. Dropout voltage vs. junction
temperature
Figure 5. Reference voltage vs. junction
Figure 6. Basic adjustable regulator
LM117, LM217, LM317 Application information
Doc ID 2154 Rev 17 9/25
6 Application information
The LM117, LM217, LM317 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 3), giving an output voltage VO of:
VO = VREF (1 + R2/R1) + IADJ R2
The device was designed to minimize the term IADJ (100 µA max) and to maintain it very
constant with line and load changes. Usually, the error term IADJ × R2 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 LM117, LM217, LM317 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 long as the maximum input-to-output differential is not exceeded.
Furthermore, programmable regulator 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 R1 (see Figure 3)
should be tied as close as possible to the regulator, while the ground terminal of R2 should
be near the ground of the load to provide remote ground sensing. Performance may be
improved with added capacitance as follow:
An input bypass capacitor of 0.1 µF
An adjustment terminal to ground 10 µF capacitor to improve the ripple rejection of about 15
dB (CADJ).
An 1 µF tantalum (or 25 µF Aluminium electrolytic) capacitor on the output to improve
transient response. In additional to external capacitors, it is good practice to add protection
diodes, as shown in Figure 4 D1 protect the device against input short circuit, while D2
protect against output short circuit for capacitance discharging.
Note: D1 protect the device against input short circuit, while D2 protects against output short
circuit for capacitors discharging.
Figure 7. Voltage regulator with protection diodes
Application information LM117, LM217, LM317
10/25 Doc ID 2154 Rev 17
IO = (VREF / R1) + IADJ = 1.25 V / R1
Figure 8. Slow turn-on 15 V regulator
Figure 9. Current regulator
Figure 10. 5 V electronic shut-down regulator
LM117, LM217, LM317 Application information
Doc ID 2154 Rev 17 11/25
(R2 sets maximum VO)
* RS sets output impedance of charger ZO = RS (1 + R2/R1). Use of RS allows low charging rates whit fully
charged battery.
Figure 11. Digitally selected outputs
Figure 12. Battery charger (12 V)
Application information LM117, LM217, LM317
12/25 Doc ID 2154 Rev 17
* R3 sets peak current (0.6 A for 1 0).
** C1 recommended to filter out input transients.
Figure 13. Current limited 6 V charger
LM117, LM217, LM317 Package mechanical data
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7 Package mechanical data
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.
Table 6. TO-220 mechanical data
Dim.
Type STD - ST Dual Gauge Type STD - ST Single Gauge
mm. mm.
Min. Typ. Max. Min. Typ. Max.
A 4.40 4.60 4.40 4.60
b 0.61 0.88 0.61 0.88
b1 1.14 1.70 1.14 1.70
c 0.48 0.70 0.48 0.70
D 15.25 15.75 15.25 15.75
D1 1.27
E 10.00 10.40 10.00 10.40
e 2.40 2.70 2.40 2.70
e1 4.95 5.15 4.95 5.15
F 1.23 1.32 0.51 0.60
H1 6.20 6.60 6.20 6.60
J1 2.40 2.72 2.40 2.72
L 13.00 14.00 13.00 14.00
L1 3.50 3.93 3.50 3.93
L20 16.40 16.40
L30 28.90 28.90
P 3.75 3.85 3.75 3.85
Q 2.65 2.95 2.65 2.95
Package mechanical data LM117, LM217, LM317
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Note: 1 Max resin gate protrusion: 0.5 mm.
2 Resin gate position is accepted in each of the two positions shown on the drawing, or their
symmetrical.
Figure 14. Drawing dimension TO-220 (type STD-ST Dual Gauge)
0015988/A
LM117, LM217, LM317 Package mechanical data
Doc ID 2154 Rev 17 15/25
Note: In spite of some difference in tolerances, the packages are compatible.
Figure 15. Drawing dimension TO-220 (type STD-ST Single Gauge)
8174627_B
Package mechanical data LM117, LM217, LM317
16/25 Doc ID 2154 Rev 17
Figure 16. Drawing dimension tube for TO-220 Dual Gauge (mm.)
Figure 17. Drawing dimension tube for TO-220 Single Gauge (mm.)
LM117, LM217, LM317 Package mechanical data
Doc ID 2154 Rev 17 17/25
Dim. mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 11.85 0.466
B0.96 1.05 1.10 0.037 0.041 0.043
C 1.70 0.066
D8.7 0.342
E 20.0 0.787
G 10.90.429
N 16.90.665
P 26.2 1.031
R3.88 4.090.152 0.161
U39.5 1.555
V30.10 1.185
TO-3 mechanical data
P003C/C
E
B
R
C
D
A
P
G
N
V
U
O
Package mechanical data LM117, LM217, LM317
18/25 Doc ID 2154 Rev 17
Dim. mm. inch.
Min. Typ Max. Min. Typ. Max.
A 4.40 4.60 0.1730.181
B 2.5 2.7 0.098 0.106
D 2.5 2.75 0.098 0.108
E 0.45 0.70 0.017 0.027
F 0.75 1 0.0300.039
F1 1.15 1.50 0.045 0.059
F2 1.15 1.50 0.045 0.059
G4.95 5.2 0.194 0.204
G1 2.4 2.7 0.094 0.106
H 10.0 10.40 0.393 0.409
L2 16 0.630
L328.6 30.6 1.126 1.204
L4 9.810.6 0.3850.417
L5 2.93.6 0.114 0.142
L6 15.916.4 0.626 0.645
L7 99.30.354 0.366
DIA. 33.2 0.1180.126
TO-220FP mechanical data
7012510A-
H
LM117, LM217, LM317 Package mechanical data
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Figure 18. Drawing dimension D²PAK (type STD-ST)
0079457/L
Package mechanical data LM117, LM217, LM317
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Figure 19. Drawing dimension D²PAK (type WOOSEOK-SUBCON.)
0079457/L
LM117, LM217, LM317 Package mechanical data
Doc ID 2154 Rev 17 21/25
Note: The D²PAK package coming from the subcontractor Wooseok is fully compatible with the
ST's package suggested footprint.
Table 7. D²PAK mechanical data
Dim.
Type STD-ST Type WOOSEOK-Subcon.
mm. mm.
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.40 4.60 4.30 4.70
A1 0.03 0.23 0 0.20
b 0.70 0.93 0.70 0.90
b2 1.14 1.70 1.17 1.37
c 0.45 0.60 0.45 0.50 0.60
c2 1.23 1.36 1.25 1.30 1.40
D 8.95 9.35 9 9.20 9.40
D1 7.50 7.50
E 10 10.40 9.80 10.20
E1 8.50 7.50
e2.54 2.54
e1 4.88 5.28 5.08
H 15 15.85 15 15.30 15.60
J1 2.49 2.69 2.20 2.60
L 2.29 2.79 1.79 2.79
L1 1.27 1.40 1 1.40
L2 1.30 1.75 1.20 1.60
R 0.4 0.30
V2 3°
Package mechanical data LM117, LM217, LM317
22/25 Doc ID 2154 Rev 17
Figure 20. D²PAK footprint recommended data
Table 8. Footprint data
Values
Dim. mm. inch.
A 12.20 0.480
B9.750.384
C 16.90 0.665
D3.500.138
E1.600.063
F2.540.100
G5.080.200
LM117, LM217, LM317 Package mechanical data
Doc ID 2154 Rev 17 23/25
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.813.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 10.50 10.6 10.70 0.4130.417 0.421
Bo 15.70 15.80 15.90 0.6180.622 0.626
Ko 4.80 4.90 5.00 0.189 0.193 0.197
Po 3.94.0 4.1 0.1530.157 0.161
P 11.912.0 12.1 0.4680.472 0.476
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
Revision history LM117, LM217, LM317
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8 Revision history
Table 9. Document revision history
Date Revision Changes
01-Sep-2004 10 Mistake VREF ==> VO, tables 1, 4 and 5.
19-Jan-2007 11 D²PAK mechanical data has been updated, add footprint data and the
document has been reformatted.
13-Jun-2007 12 Change values ΔIADJ and VREF test condition of IO = 10 mA to IMAX ==>
IO = 10 mA to 500 mA on Ta bl e 5 .
23-Nov-2007 13 Added Ta b le 1 .
06-Feb-2008 14 Added: TO-220 mechanical data Figure 14 on page 14 and Table 6 on
page 13.
02-Mar-2010 15 Added: notes Figure 14 on page 14, Figure 15 on page 15, Figure 16 and
Figure 17 on page 16.
17-Nov-2010 16 Modified: RthJC value for TO-220 Table 3 on page 4.
18-Nov-2011 17 Added order code LM317T-DG Table1 on page1.
LM117, LM217, LM317
Doc ID 2154 Rev 17 25/25
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