LM217M
LM317M
Medium current 1.2 to 37V adjustable voltage regulator
Feature summary
■
■
■
■
■
■
■
■
Output voltage range: 1.2 to 37V
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
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.
TO-220
DPAK
Description
The LM217M/LM317M are monolithic integrated
circuits in TO-220 and DPAK packages intended
for use as positive adjustable voltage regulators.
They are designed to supply until 500 mA of load
Schematic diagram
December 2006
Rev. 6
1/21
www.st.com
21
LM217M/LM317M
Contents
1
2
3
4
5
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1
5.2
5.3
External capacitors (Figure
7.)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Protection diodes (Figure
7.)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Start-up block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
7
8
9
Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Order code
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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LM217M/LM317M
Pin configuration
1
Figure 1.
Pin configuration
Pin connections (top view)
TO-220
DPAK
3/21
Maximum ratings
LM217M/LM317M
2
Table 1.
Symbol
V
I
-V
O
P
D
T
OP
T
STG
Maximum ratings
Absolute maximum ratings
Parameter
Input-Output differential voltage
Power dissipation
Operating junction temperature range
(1)
Storage temperature range
for LM217M
for LM317M
Value
40
Internally Limited
-40 to 125
°C
0 to 125
-55 to 150
°C
Unit
V
mW
1. Re-Boot is not guaranteed for T
J
≥
85°C.
Table 2.
Symbol
R
thJC
R
thJA
Thermal data
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
TO-220
3
50
DPAK
8
100
Unit
°C/W
°C/W
Figure 2.
Test circuit
4/21
LM217M/LM317M
Electrical characteristics
3
Table 3.
Symbol
∆V
O
Electrical characteristics
Electrical characteristics of LM217M
(refer to the test circuits, T
J
= - 40 to 125°C,
V
I
- V
O
= 5 V, I
O
= 100 mA, P
D
≤
7.5 W, unless otherwise specified)
Parameter
Line regulation
Test conditions
V
I
- V
O
= 3 to 40 V
V
O
≤
5 V
I
O
= 10 to 500mA
Load regulation
V
O
≥
5 V
I
O
= 10 to 500mA
Adjustment pin current
Adjustment pin current
Reference voltage
Output voltage
temperature stability
Minimum load current
Maximum output current
Output noise voltage
(percentage of V
O
)
Supply voltage rejection
(1)
V
I
- V
O
= 40 V
V
I
- V
O
≤
15 V
V
I
- V
O
= 40 V, P
d
< P
DMAX
, 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
500
V
I
- V
O
= 3 to 40 V, I
O
= 10 to 500 mA
V
I
- V
O
= 3 to 40 V, I
O
= 10 to 500 mA
1.2
T
J
= 25°C
0.1
0.3
50
0.2
1.25
0.7
3.5
1000
mA
200
0.003
65
dB
80
%
5
0.3
1
100
5
1.3
%/V
O
µA
µA
V
%
mA
T
J
= 25°C
Min.
Typ.
0.01
0.02
T
J
= 25°C
5
20
Max.
0.02
%/V
0.05
15
mV
50
Unit
∆V
O
I
ADJ
∆I
ADJ
V
REF
∆V
O
/V
O
I
O(min)
I
O(max)
eN
SVR
1. C
ADJ
is connected between Adjust pin and Ground.
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