LM217M, LM317M
Medium current 1.2 to 37 V adjustable voltage regulator
Datasheet - production data
Description
The LM217M and LM317M are monolithic
integrated circuits in DPAK package used as
positive adjustable voltage regulators. They are
designed to supply until 500 mA of load current
with an output voltage adjustable over a 1.2 to 37
V range. The nominal output voltage is selected
by one resistive divider only, making the device
exceptionally easy to configure and avoiding the
use of several fixed regulators.
Features
Output voltage range: 1.2 to 37 V
Output current in excess of 500 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
Table 1: Device summary
Order code
LM217MDT-TR
LM317MDT-TR
Packing
Tape and reel
October 2015
DocID2577 Rev 9
1/19
www.st.com
This is information on a product in full production.
Contents
LM217M, LM317M
Contents
1
2
3
4
5
6
Diagram ............................................................................................ 3
Pin configuration ............................................................................. 4
Maximum ratings ............................................................................. 5
Electrical characteristics ................................................................ 6
Typical performance ....................................................................... 8
Application information ................................................................ 10
6.1
6.2
6.3
External capacitors.......................................................................... 10
Protection diodes ............................................................................ 10
Start-up block .................................................................................. 10
7
8
Application circuits ....................................................................... 11
Package information ..................................................................... 13
8.1
8.2
DPAK (TO-252) package information .............................................. 13
DPAK (TO-252) packing information ............................................... 16
9
Revision history ............................................................................ 18
2/19
DocID2577 Rev 9
LM217M, LM317M
Diagram
1
Diagram
Figure 1: Schematic diagram
DocID2577 Rev 9
3/19
Pin
configuration
LM217M, LM317M
2
Pin configuration
Figure 2: Pin connections (top view)
4/19
DocID2577 Rev 9
LM217M, LM317M
Maximum
ratings
3
Maximum ratings
Table 2: Absolute maximum ratings
Symbol
V
I
-V
O
P
D
T
OP
T
STG
Notes:
(1)
Reboot
Parameter
Input-to-output differential voltage
Power dissipation
Operating junction temperature range
Storage temperature range
(1)
Value
40
Internally limited
LM217M
LM317M
-40 to 125
0 to 125
-55 to 150
Unit
V
mW
°C
°C
is not guaranteed for T
J
≥ 85 °C.
Table 3: Thermal data
Symbol
R
thJC
R
thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
Figure 3: Test circuit
DPAK
8
100
Unit
°C/W
°C/W
DocID2577 Rev 9
5/19
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