LM217, LM317
Datasheet
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
D²PAK
Description
The
LM217, LM317
are monolithic integrated circuits in TO-220, TO-220FP 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 a resistive divider, making the
device exceptionally easy to use and eliminating the stocking of many fixed
regulators.
Maturity status link
LM217
LM317
DS0433
-
Rev 20
-
May 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
LM217, LM317
Pin configuration
1
Pin configuration
Figure 1.
Pin connections (top view)
TO-220
TO-220FP
D²PAK
DS0433
-
Rev 20
page 2/32
LM217, LM317
Maximum ratings
2
Maximum ratings
Table 1.
Absolute maximum ratings
Symbol
V
I
- V
O
I
O
Parameter
Input-reference differential voltage
Output current
LM217
T
OP
Operating junction temperature for:
LM317
LM317B
P
D
T
STG
Power dissipation
Storage temperature
Value
40
Internally limited
- 25 to 150
0 to 125
-40 to 125
Internally limited
- 65 to 150
°C
°C
Unit
V
A
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.
Thermal data
Symbol
R
thJA
R
thJC
Parameter
Thermal resistance junction-ambient
Thermal resistance junction-case
D²PAK
62.5
3
TO-220
50
5
TO-220FP
60
5
Unit
°C/W
°C/W
DS0433
-
Rev 20
page 3/32
LM217, LM317
Diagram
3
Diagram
Figure 2.
Schematic diagram
DS0433
-
Rev 20
page 4/32
LM217, LM317
Electrical characteristics
4
Electrical characteristics
V
I
- V
O
= 5 V, I
O
= 500 mA, I
MAX
= 1.5 A and P
MAX
= 20 W, T
J
= - 55 to 150 °C, unless otherwise specified.
Table 3.
Electrical characteristics for LM217
Symbol
ΔV
O
Parameter
Line regulation
Test conditions
V
I
- V
O
= 3 to 40 V
V
O
≤ 5 V
ΔV
O
Load regulation
I
O
= 10 mA to I
MAX
V
O
≥ 5 V,
I
O
= 10 mA to I
MAX
I
ADJ
ΔI
ADJ
V
REF
ΔV
O
/V
O
I
O(min)
I
O(max)
Adjustment pin current
Adjustment pin current
Reference voltage
Output voltage temperature
stability
Minimum load current
Maximum load current
Output noise voltage (percentage
of V
O
)
Supply voltage rejection
(1)
V
I
- V
O
= 40 V
V
I
- V
O
≤ 15 V, P
D
< P
MAX
V
I
- V
O
= 40 V, P
D
< P
MAX
, T
J
= 25°C
B = 10 Hz to 100 kHz, T
J
= 25°C
T
J
= 25°C, f = 120 Hz
C
ADJ
= 0
C
ADJ
= 10 µF
66
1.5
0.4
0.003
65
80
V
I
- V
O
= 2.5 to 40 V I
O
= 10 mA to I
MAX
V
I
- V
O
= 2.5 to 40 V I
O
= 10 mA to I
MAX
P
D
≤ P
MAX
1.2
T
J
= 25°C
T
J
= 25°C
Min.
Typ.
0.01
0.02
T
J
= 25°C
5
20
0.1
0.3
50
0.2
1.25
Max. Unit
0.02
0.05
15
50
0.3
1
100
5
1.3
%/V
mV
%
µA
µA
V
1
3.5
2.2
5
%
mA
A
eN
%
SVR
dB
1. C
ADJ
is connected between adjust pin and ground.
DS0433
-
Rev 20
page 5/32
