LM217L
LM317L
LOW CURRENT
1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR
■ 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 TRANSISTOR SAFE AREA
COMPENSATION
■ FLOATING OPERATION FOR HIGH
VOLTAGE APPLICATIONS
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.
The nominal output voltage is selected by means
of only a resistive divider, making the device
Figure 1: Sche m atic Diagram
TO-92 SO-8
exceptionally easy to use and eliminating the
stocking of many fixed regulators
Rev. 2
1/13March 2005
LM217L/LM317L
Table 1: Absolute Maximum Ratings
Symbol Parameter Value Unit
V
I - VO
P
T
opr
T
stg
Figure 2: Pin Con nection (top view)
Input-Output Differential Voltage
Power Dissipation
d
Operating Junction T emperature
Range
Storage Temperature Range
40 V
Internally Limited
for LM217L -40 to 125
for LM317L 0 to 125
-55 to 150 °C
PIN 1 = ADJUST
PIN 2 = IN
BOTTOM VIEW
PIN 3 = OUT
°C
SO-8 TO-92
Table 2: Order Codes
TYPE SO-8 (TUBE) (*) TO-92 (TUBE) (#)
LM217L LM217LD LM217LZ
LM317L LM317LD LM317LZ
(*) Avai l abl e in Tape & Reel wi t h the suffix "-TR".
(#) Avail able in Tape & Reel wi th the suffix "-T R" and in Ammopak with the suffix "-AP". Please note that in these cases pins are shaped
accordi ng to Tape & Reel specifications.
Figure 3: Test Circuit
2/13
LM217L/LM317L
Table 3: Electrical Characteristics Of LM217L (refer to th e test circuits, TJ = - 40 to 125°C,
- VO = 5 V, IO = 40 mA, unless otherwise specified).
V
I
Symbol Parameter Test Conditions Min. Typ. Max. Unit
∆V
∆V
I
∆I
V
∆V
I
O(min)
I
O(max)
SVR Supply Voltage Rejection (*) T
Line Regulation VI - VO = 3 to 40 V
O
Load Regulation VO ≤ 5 V
O
Adjustment Pin Current 50 100 µA
ADJ
Adjustment Pin Current VI - VO = 3 to 40 V IO = 5 to 100 mA
ADJ
Reference Voltage VI - VO = 3 to 40 V IO = 10 to 500 mA
REF
Output Voltage
O/VO
Temperature Stability
I
< 20 mA
L
I
= 5 to 100 mA
O
V
≥ 5 V
O
I
= 5 to 100 mA
O
P
< 625 mW
d
P
< 625 mW
d
= 25°C 0.01 0.02 %/V
T
J
0.02 0.05
= 25°C 5 15 mV
T
J
20 50
= 25°C 0.1 0.3 %
T
J
0.3 1
0.2 5 µA
1.21.251.3 V
0.7 %
Minimum Load Current VI - VO = 40 V 3.5 5 mA
Maximum Output Current VI - VO = 3 to 13 V 100 200 mA
- VO = 40 V 50
V
I
eN Output Noise Vo ltage B = 10 Hz to 10 KHzT
= 25°C
J
f = 120 Hz
= 25°C 0.003 %
J
C
= 0 65 dB
ADJ
C
= 10 µF 66 80
ADJ
(*) CADJ is connected between Adjust pin and Ground.
3/13
LM217L/LM317L
Table 4: Electrical Characteristics Of LM317L (refer to th e test circuits, TJ = 0 to 125°C,
- VO = 5 V, IO = 40 mA, unless otherwise specified).
V
I
Symbol Parameter Test Conditions Min. Typ. Max. Unit
∆V
∆V
I
∆I
V
∆V
I
O(min)
I
O(max)
SVR Supply Voltage Rejection (*) T
Line Regulation VI - VO = 3 to 40 V
O
Load Regulation VO ≤ 5 V
O
Adjustment Pin Current 50 100 µA
ADJ
Adjustment Pin Current VI - VO = 3 to 40 V IO = 5 to 100 mA
ADJ
Reference Voltage VI - VO = 3 to 40 V IO = 5 to 100 mA
REF
Output Voltage
O/VO
Temperature Stability
I
< 20 mA
L
I
= 5 to 100 mA
O
V
≥ 5 V
O
I
= 5 to 100 mA
O
P
< 625 mW
d
P
< 625 mW
d
= 25°C 0.01 0.04 %/V
T
J
0.02 0.07
= 25°C 5 25 mV
T
J
20 70
= 25°C 0.1 0.5 %
T
J
0.3 1.5
0.2 5 µA
1.21.251.3 V
0.7 %
Minimum Load Current VI - VO = 40 V 3.5 5 mA
Maximum Output Current VI - VO = 3 to 13 V 100 200 mA
- VO = 40 V 50
V
I
eN Output Noise Vo ltage B = 10 Hz to 10 KHzT
= 25°C
J
f = 120 Hz
= 25°C 0.003 %
J
C
= 0 65 dB
ADJ
C
= 10 µF 66 80
ADJ
(*) CADJ is connected between Adjust pin and Ground.
Figure 4: Current Limit
Figure 5: Minimum Operating Current
4/13
APPLICATION INFORMATION
The LM317L provides an internal reference
voltage of 1.25V between the output and
adjustments terminals. This is used to set a
constant current flow across an external resistor
divider (see fig. 4), giving an output voltage V
V
O
= V
(1 + R2/R1) + I
REF
ADJ R2
of:
O
The device was designed to minimize the term
I
(100µA max) and to maintain it very constant
ADJ
with line and load changes. Usually, the error term
I
× R2 can be neglected. To obtain the previous
ADJ
requirement, all the regulator quiescent current is
returned to the output terminal, imposing a
minimum load current condition. If the load is
insufficient, the output voltage will rise.
Figure 6: Basic Adjustable Regulator
LM217L/LM317L
Since the LM317L is a floating regulator and
"sees" only the input-to-output differential voltage,
supplies of very high voltage with respect to
ground can be regulated as long as the maximum
input-to-output differential is not exceeded.
Furthermore, programmable regulator are easily
obtainable and, by connecting a fixed resistor
between the adjustment and output, the device
can be used as a prec ision current regulator. In
order to optim ize the load regulation, the current
set resistor R
as possible to the regulator, while the ground
terminal of R
load to provide remote ground sensing.
(see fig. 4) should be tied as close
1
should be near the ground of the
2
Figure 7: Voltage Regulator with Protection Diodes
5/13
LM217L/LM317L
Figure 8: Slow Turn-on 15V R egulato r
Figure 9: Curr ent Regulator
V
ref
IO = + I
R
1
ADJ
1.25V
≈
R
Figure 10: 5V Ele ctronic S hut-down R egulator
1
6/13
Figure 11: Digitally Selected Outputs
(R2 = sets maximum VO)
LM217L/LM317L
7/13
LM217L/LM317L
SO-8 MECHANICAL DATA
DIM.
A 1.35 1.75 0.053 0.069
A1 0.10 0.25 0.04 0.010
A2 1.10 1.65 0.043 0.065
B 0.33 0.51 0.013 0.020
C 0.19 0.25 0.007 0.010
D 4.80 5.00 0.189 0.197
E 3.80 4.00 0.150 0.157
e 1.27 0.050
H 5.80 6.20 0.228 0.244
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
k ˚ (max.)
ddd 0.1 0.04
MIN. TYP MAX. MIN. TYP. MAX.
mm. inch
8
8/13
0016023/C
LM217L/LM317L
TO-92 MECHANICA DATA
mm. mils
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 4.32 4.95 170.1 194.9
b 0.36 0.51 14.2 20.1
D 4.45 4.95 175.2 194.9
E 3.30 3.94 129.9 155.1
e 2.41 2.67 94.9 105.1
e1 1.14 1.40 44.9 55.1
L 12.7 15.49 500.0 609.8
R 2.16 2.41 85.0 94.9
S1 0.92 1.52 36.2 59.8
W 0.41 0.56 16.1 22.0
0102782/C
9/13
LM217L/LM317L
Tape & Reel SO-8 MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 8.1 8.5 0.319 0.335
Bo 5.5 5.9 0.216 0.232
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
10/13
Tape & Reel for TO-92 MECHANICAL DATA
LM217L/LM317L
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
mm. inch
A1 4.80 0.189
T 3.80 0.150
T1 1.60 0.063
T2 2.30 0.091
d 0.48 0.019
P0 12.5 12.9 0.492 0.508
P2 5.65 7.05 0.222 0.278
F1, F2 2.44 2.54 2.94 0.096 0.100 0.116
delta H ±2 0.079
W 17.5 18.00 19.0 0.689 0.709 0.748
W0 5.7 6.3 0.224 0.248
W1 8.5 9.25 0.335 0.364
W2 0.50 0.20
H 18.50 18.70 0.728 0.726
H0 15.50 16.50 0.610 0.650
H1 25.00 0.984
D0 3.8 4.2 0.150 0.165
t 0.90 0.035
L1 3 0.118
delta P ±1 0.039
u 50 1.968
Φ1 360 14.173
Φ2 30 1.181
H1
delta P
A1
delta H
H
H0
L
d
W2
T
T2
T1
Φ1
Φ2
Pull-out direction
l1
W
W0
W1
F1
F2
P2
P0
D0
t
u
DRAWING NOT IN SCALE
11/13
LM217L/LM317L
Table 5: Revision History
Date R evisio n Descrip tion of Change s
16-Mar-2005 2 Add Tape & Reel for TO-92.
12/13
LM217L/LM317L
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13/13
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