LM117/LM217/LM317
1.2V to 37V Adjustable voltage regulators
Feature summary
■
■
■
■
■
Output voltage range: 1.2 to 37V
Output current in excess of 1.5A
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 circuit in TO-220, TO-220FP, TO-3 and
D
2
PAK packages intended for use as positive
adjustable voltage regulators.
They are designed to supply more than 1.5A of
load current with an output voltage adjustable
over a 1.2 to 37V 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.
D
2
PAK
TO-3
Order code
Package
Part number
TO-220
LM117
LM217
LM317
January 2007
LM217T
LM317T
LM217D2T
LM317D2T
Rev. 11
LM317P
D
2
PAK
TO-220FP
TO-3
LM117K
LM217K
LM317K
1/25
www.st.com
25
LM117/LM217/LM317
Contents
1
2
3
4
5
6
7
8
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
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Maximum ratings
LM117/LM217/LM317
2
Table 1.
Symbol
V
I
- V
O
I
O
Maximum ratings
Absolute maximum ratings
Parameter
Input-Reference Differential Voltage
Output Current
LM117
T
op
Operating Junction Temperature for:
LM217
LM317
P
tot
T
stg
Power Dissipation
Storage Temperature
Value
40
V
Internally Limited
-55 to 150
-25 to 150
0 to 125
Internally Limited
-65 to 150
°C
°C
Unit
Note:
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied
Thermal Data
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
D
2
PAK
3
62.5
TO-220
3
50
TO-220FP
5
60
TO-3
4
35
Unit
°C/W
°C/W
Table 2.
Symbol
R
thJC
R
thJA
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Analog electronics
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