ST LM217L, LM317L User Manual
Low current 1.2 to 37V adjustable voltage regulator
Features
■ Output voltage range: 1.2 to 37V
■ Output current in excess of 100 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
TO-92
LM217L
LM317L
SO-8
Description
The LM217L/LM317L are monolithic integrated
circuit in SO-8 and TO-92 packages intended for
use as positive adjustable voltage regulators.
They are designed to supply until 100 mA of load
current with an output voltage adjustable over a
1.2 to 37V range.
Order codes
Part numbers
SO-8 (Tape & reel) TO-92 (BAG)
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.
Packages
(1)
LM217L LM217LD13TR LM217LZ
LM317L LM317LD13TR LM317LZ
1. Available in tape & reel with the suffix "-TR" and in Ammopak with the suffix "-AP". Please note that in these cases pins are
shaped according to tape & reel specifications
May 2007 Rev. 4 1/18
www.st.com
18
LM217L/LM317L
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
LM217L/LM317L Diagram
1 Diagram
Figure 1. Schematic diagram
3/18
Pin configuration LM217L/LM317L
2 Pin configuration
Figure 2. Pin connections (top view for SO-8, bottom view for TO-92)
PIN 1 = ADJUST
PIN 2 = IN
PIN 3 = OUT
SO-8
TO-92
4/18
LM217L/LM317L Maximum ratings
3 Maximum ratings
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
V
T
T
I-VO
P
OP
STG
Input-output differential voltage 40 V
Power dissipation Internally Limited mW
D
Operating junction temperature range
Storage temperature range -55 to 150 °C
Figure 3. Test circuit
for LM217L -40 to 125
°C
for LM317L 0 to 125
5/18
Electrical characteristics LM217L/LM317L
4 Electrical characteristics
Table 2. Electrical characteristics of LM217L (refer to the test circuits, TJ = - 40 to 125°C,
V
- VO = 5 V, IO = 40 mA, unless otherwise specified)
I
Symbol Parameter Test conditions Min. Typ. Max. Unit
= 25°C 0.01 0.02
T
J
0.02 0.05
= 25°C 5 15
T
J
20 50
= 25°C 0.1 0.3
T
J
0.3 1
0.2 5 µA
1.2 1.25 1.3 V
%/V
mV
%
ΔI
V
ΔV
ΔV
I
ADJ
- VO = 3 to 40 V
V
Line regulation
O
I
< 20 mA
I
L
VO ≤ 5 V
IO = 5 to 100 mA
Load regulation
O
≥ 5 V
V
O
= 5 to 100 mA
I
O
Adjustment pin current 50 100 µA
- VO = 3 to 40 V, IO = 5 to 100 mA
V
Adjustment pin current
ADJ
Reference voltage
REF
I
< 625 mW
P
d
- VO = 3 to 40 V, IO = 10 to 500 mA
V
I
Pd < 625 mW
ΔVO/V
I
O(min)
Output voltage
O
temperature stability
Minimum load current VI - VO = 40 V 3.5 5 mA
VI - VO = 3 to 13 V 100 200
I
O(max)
Maximum output current
- VO = 40 V 50
V
I
eN Output noise voltage B = 10 Hz to 10 KHz, T
TJ = 25°C
SVR Supply voltage rejection
1. C
is connected between adjust pin and ground.
ADJ
(1)
f = 120 Hz
0.7 %
= 25°C 0.003 %
J
= 0 65
C
ADJ
= 10 µF 66 80
C
ADJ
mA
dB
6/18
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