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
TO-220 TO-220FP
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
D²PAK TO-3
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.
Table 1. Device summary
Order codes
TO-220 D²PAK (tape and reel) TO-220FP TO-3
LM117K
LM217T LM217D2T-TR LM217K
LM317T LM317D2T-TR LM317P LM317K
November 2010 Doc ID 2154 Rev 16 1/25
www.st.com 25
Contents LM117, LM217, LM317
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
2/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Pin configuration
1 Pin configuration
Figure 1. Pin connections (top view)
TO-220
TO-220FP
D²PAK (Any Type)
TO-3
Doc ID 2154 Rev 16 3/25
Maximum ratings LM117, LM217, LM317
2 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
VI - VO Input-reference differential voltage 40
V
IO Output current Internally limited
LM117 - 55 to 150
TOP Operating junction temperature for: LM217 - 25 to 150 °C
LM317 0 to 125
PD Power dissipation Internally limited
TSTG Storage temperature - 65 to 150 °C
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
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
4/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Diagram
3 Diagram
Figure 2. Schematic diagram
Doc ID 2154 Rev 16 5/25
Electrical characteristics LM117, LM217, LM317
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
TJ = 25°C 0.01 0.02
"VO Line regulation VI - VO = 3 to 40 V %/V
0.02 0.05
TJ = 25°C 5 15
VO d"5 V
mV
IO = 10 mA to IMAX
20 50
"VO Load regulation
TJ = 25°C 0.1 0.3
VO e"5 V,
%
IO = 10 mA to IMAX
0.3 1
IADJ Adjustment pin current 50 100 µA
"IADJ Adjustment pin current VI - VO = 2.5 to 40V IO = 10 mA to IMAX 0.2 5 µA
Reference voltage VI - VO = 2.5 to 40V IO= 10 mA to IMAX
VREF 1.2 1.25 1.3 V
(between pin 3 and pin 1) PD d" PMAX
Output voltage
"VO/VO 1%
temperature stability
IO(min) Minimum load current VI - VO = 40 V 3.5 5 mA
VI - VO d" 15 V, PD < PMAX 1.5 2.2
IO(max) Maximum load current A
VI - VO = 40 V, PD < PMAX, TJ = 25°C 0.4
Output noise voltage
eN B = 10Hz to 100kHz, TJ = 25°C 0.003 %
(percentage of VO)
CADJ=0 65
SVR Supply voltage rejection (1) TJ = 25°C, f = 120Hz dB
CADJ=10µF 66 80
1. CADJ is connected between pin 1 and ground.
6/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Electrical characteristics
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
TJ = 25°C 0.01 0.04
"VO Line regulation VI - VO = 3 to 40 V %/V
0.02 0.07
TJ = 25°C 5 25
VO d" 5 V
mV
IO = 10 mA to IMAX
20 70
"VO Load regulation
TJ = 25°C 0.1 0.5
VO e"5 V,
%
IO = 10 mA to IMAX
0.3 1.5
IADJ Adjustment pin current 50 100 µA
VI - VO = 2.5 to 40V,
"IADJ Adjustment pin current 0.2 5 µA
IO = 10 mA to 500mA
Reference voltage VI - VO = 2.5 to 40V IO = 10 mA to 500mA
VREF 1.2 1.25 1.3 V
(between pin 3 and pin 1) PD d" PMAX
Output voltage
"VO/VO 1%
temperature stability
IO(min) Minimum load current VI - VO = 40 V 3.5 10 mA
VI - VO d" 15 V, PD < PMAX 1.5 2.2
IO(max) Maximum load current A
VI - VO = 40 V, PD < PMAX, TJ = 25°C 0.4
Output noise voltage
eN B = 10Hz to 100kHz, TJ = 25°C 0.003 %
(percentage of VO)
CADJ=0 65
SVR Supply voltage rejection (1) TJ = 25°C, f = 120Hz dB
CADJ=10µF 66 80
1. CADJ is connected between pin 1 and ground.
Doc ID 2154 Rev 16 7/25
Typical characteristics LM117, LM217, LM317
5 Typical characteristics
Figure 3. Output current vs. input-output Figure 4. Dropout voltage vs. junction
differential voltage temperature
Figure 5. Reference voltage vs. junction
Figure 6. Basic adjustable regulator
8/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Application information
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.
Figure 7. Voltage regulator with protection diodes
Note: D1 protect the device against input short circuit, while D2 protects against output short
circuit for capacitors discharging.
Doc ID 2154 Rev 16 9/25
Application information LM117, LM217, LM317
Figure 8. Slow turn-on 15 V regulator
Figure 9. Current regulator
IO = (VREF / R1) + IADJ = 1.25 V / R1
Figure 10. 5 V electronic shut-down regulator
10/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Application information
Figure 11. Digitally selected outputs
(R2 sets maximum VO)
Figure 12. Battery charger (12 V)
* RS sets output impedance of charger ZO = RS (1 + R2/R1). Use of RS allows low charging rates whit fully
charged battery.
Doc ID 2154 Rev 16 11/25
Application information LM117, LM217, LM317
Figure 13. Current limited 6 V charger
* R3 sets peak current (0.6 A for 1 0).
** C1 recommended to filter out input transients.
12/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Package mechanical data
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
Type STD - ST Dual Gauge Type STD - ST Single Gauge
Dim. 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
Doc ID 2154 Rev 16 13/25
Package mechanical data LM117, LM217, LM317
Figure 14. Drawing dimension TO-220 (type STD-ST Dual Gauge)
0015988/A
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.
14/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Package mechanical data
Figure 15. Drawing dimension TO-220 (type STD-ST Single Gauge)
8174627_B
Note: In spite of some difference in tolerances, the packages are compatible.
Doc ID 2154 Rev 16 15/25
Package mechanical data LM117, LM217, LM317
Figure 16. Drawing dimension tube for TO-220 Dual Gauge (mm.)
Figure 17. Drawing dimension tube for TO-220 Single Gauge (mm.)
16/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Package mechanical data
TO-3 mechanical data
mm. inch.
Dim.
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
D 8.7 0.342
E 20.0 0.787
G 10.9 0.429
N 16.9 0.665
P 26.2 1.031
R 3.88 4.09 0.152 0.161
U 39.5 1.555
V 30.10 1.185
A D
P
G C
R
P003C/C
Doc ID 2154 Rev 16 17/25
E
U
V
B
N
O
Package mechanical data LM117, LM217, LM317
TO-220FP mechanical data
mm. inch.
Dim.
Min. Typ Max. Min. Typ. Max.
A 4.40 4.60 0.173 0.181
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
L3 28.6 30.6 1.126 1.204
L4 9.8 10.6 0.3850.417
L5 2.93.6 0.114 0.142
L6 15.9 16.4 0.626 0.645
L7 99.3 0.354 0.366
DIA. 33.2 0.118 0.126
7012510A-H
18/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Package mechanical data
Figure 18. Drawing dimension D²PAK (type STD-ST)
0079457/L
Doc ID 2154 Rev 16 19/25
Package mechanical data LM117, LM217, LM317
Figure 19. Drawing dimension D²PAK (type WOOSEOK-SUBCON.)
0079457/L
20/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Package mechanical data
Table 7. D²PAK mechanical data
Type STD-ST Type WOOSEOK-Subcon.
Dim. 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 0° 8° 0° 3°
Note: The D²PAK package coming from the subcontractor Wooseok is fully compatible with the
ST's package suggested footprint.
Doc ID 2154 Rev 16 21/25
Package mechanical data LM117, LM217, LM317
Figure 20. D²PAK footprint recommended data
Table 8. Footprint data
Values
Dim. mm. inch.
A 12.20 0.480
B9.75 0.384
C 16.90 0.665
D3.50 0.138
E1.60 0.063
F2.54 0.100
G5.08 0.200
22/25 Doc ID 2154 Rev 16
LM117, LM217, LM317 Package mechanical data
Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.8 13.0 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 0.413 0.417 0.421
Bo 15.70 15.80 15.90 0.618 0.622 0.626
Ko 4.804.90 5.00 0.189 0.193 0.197
Po 3.9 4.0 4.1 0.153 0.157 0.161
P 11.9 12.0 12.1 0.468 0.472 0.476
Doc ID 2154 Rev 16 23/25
Revision history LM117, LM217, LM317
8 Revision history
Table 9. Document revision history
Date Revision Changes
01-Sep-2004 10 Mistake VREF ==> VO, tables 1, 4 and 5.
D²PAK mechanical data has been updated, add footprint data and the
19-Jan-2007 11
document has been reformatted.
Change values "IADJ and VREF test condition of IO = 10 mA to IMAX ==>
13-Jun-2007 12
IO = 10 mA to 500 mA on Table 5.
23-Nov-2007 13 Added Table 1.
Added: TO-220 mechanical data Figure 14 on page 14 and Table 6 on
06-Feb-2008 14
page 13.
Added: notes Figure 14 on page 14, Figure 15 on page 15, Figure 16 and
02-Mar-2010 15
Figure 17 on page 16.
17-Nov-2010 16 Modified: RthJC value for TO-220 Table 3 on page 4.
24/25 Doc ID 2154 Rev 16
LM117, LM217, LM317
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Doc ID 2154 Rev 16 25/25
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