LM317
MAXIMUM RATINGS
Rating
Input–Output Voltage Differential
Power Dissipation
Case 221A
T
A
= +25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 936 (D
2
PAK)
T
A
= +25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Operating Junction Temperature Range
Storage Temperature Range
Symbol
V
I
–V
O
Value
40
Unit
Vdc
P
D
θ
JA
θ
JC
P
D
θ
JA
θ
JC
T
J
T
stg
Internally Limited
65
5.0
Internally Limited
70
5.0
–40 to +125
–65 to +150
W
°C/W
°C/W
W
°C/W
°C/W
°C
°C
ELECTRICAL CHARACTERISTICS
(V
I
–V
O
= 5.0 V; I
O
= 0.5 A for D2T and T packages; T
J
= T
low
to T
high
[Note 1]; I
max
and P
max
[Note 2]; unless otherwise noted.)
Characteristics
Line Regulation (Note 3), T
A
= +25°C, 3.0 V
≤
V
I
–V
O
≤
40 V
Load Regulation (Note 3), T
A
= +25°C, 10 mA
≤
I
O
≤
I
max
V
O
≤
5.0 V
V
O
≥
5.0 V
Thermal Regulation, T
A
= +25°C (Note 6), 20 ms Pulse
Adjustment Pin Current
Adjustment Pin Current Change, 2.5 V
≤
V
I
–V
O
≤
40 V,
10 mA
≤
I
L
≤
I
max
, P
D
≤
P
max
Reference Voltage, 3.0 V
≤
V
I
–V
O
≤
40 V,
10 mA
≤
I
O
≤
I
max
, P
D
≤
P
max
Line Regulation (Note 3), 3.0 V
≤
V
I
–V
O
≤
40 V
Load Regulation (Note 3), 10 mA
≤
I
O
≤
I
max
V
O
≤
5.0 V
V
O
≥
5.0 V
Temperature Stability (T
low
≤
T
J
≤
T
high
)
Minimum Load Current to Maintain Regulation (V
I
–V
O
= 40 V)
Maximum Output Current
V
I
–V
O
≤
15 V, P
D
≤
P
max,
T Package
V
I
–V
O
= 40 V, P
D
≤
P
max
, T
A
= +25°C, T Package
RMS Noise, % of V
O
, T
A
= +25°C, 10 Hz
≤
f
≤
10 kHz
Ripple Rejection, V
O
= 10 V, f = 120 Hz (Note 4)
Without C
Adj
C
Adj
= 10
µF
Long–Term Stability, T
J
= T
high
(Note 5), T
A
= +25°C for
Endpoint Measurements
Thermal Resistance Junction to Case, T Package
4
3
1, 2
3
1
2
Figure
1
2
Symbol
Reg
line
Reg
load
–
–
Reg
therm
I
Adj
∆I
Adj
V
ref
Reg
line
Reg
load
–
–
3
3
3
T
S
I
Lmin
I
max
1.5
0.15
N
RR
–
66
3
S
R
θJC
–
–
65
80
0.3
5.0
–
–
1.0
–
%/1.0 k
Hrs.
°C/W
–
2.2
0.4
0.003
–
–
–
% V
O
dB
–
–
20
0.3
0.7
3.5
70
1.5
–
10
mV
% V
O
% V
O
mA
A
–
–
–
1.2
–
5.0
0.1
0.03
50
0.2
1.25
0.02
25
0.5
0.07
100
5.0
1.3
0.07
mV
% V
O
% V
O
/W
µA
µA
V
%V
Min
–
Typ
0.01
Max
0.04
Unit
%/V
NOTES:
1. T
low
to T
high
= 0° to +125°C, for LM317T, D2T. T
low
to T
high
= –40° to +125°C, for LM317BT, BD2T.
2. I
max
= 1.5 A, P
max
= 20 W
3. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account separately.
Pulse testing with low duty cycle is used.
4. C
Adj
, when used, is connected between the adjustment pin and ground.
5. Since Long–Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability
from lot to lot.
6. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These
effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients
on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.
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