LM317, NCV317
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2
MAXIMUM RATINGS
Rating Symbol Value Unit
Input−Output Voltage Differential V
I
−V
O
−0.3 to 40 Vdc
Power Dissipation
Case 221A
T
A
= +25°C P
D
Internally Limited W
Thermal Resistance, Junction−to−Ambient
q
JA
65 °C/W
Thermal Resistance, Junction−to−Case
q
JC
5.0 °C/W
Case 936 (D
2
PAK−3)
T
A
= +25°C P
D
Internally Limited W
Thermal Resistance, Junction−to−Ambient
q
JA
70 °C/W
Thermal Resistance, Junction−to−Case
q
JC
5.0 °C/W
Operating Junction Temperature Range T
J
−55 to +150 °C
Storage Temperature Range T
stg
−65 to +150 °C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
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
Figure Symbol Min Typ Max Unit
Line Regulation (Note 3), T
A
= +25°C, 3.0 V ≤ V
I
−V
O
≤ 40 V 1 Reg
line
− 0.01 0.04 %/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
2 Reg
load
−
−
5.0
0.1
25
0.5
mV
% V
O
Thermal Regulation, T
A
= +25°C (Note 4), 20 ms Pulse − Reg
therm
− 0.03 0.07 % V
O
/W
Adjustment Pin Current 3 I
Adj
− 50 100
mA
Adjustment Pin Current Change, 2.5 V ≤ V
I
−V
O
≤ 40 V,
10 mA ≤ I
L
≤ I
max
, P
D
≤ P
max
1, 2
DI
Adj
− 0.2 5.0
mA
Reference Voltage, 3.0 V ≤ V
I
−V
O
≤ 40 V, 10 mA ≤ I
O
≤ I
max
, P
D
≤ P
max
3 V
ref
1.2 1.25 1.3 V
Line Regulation (Note 3), 3.0 V ≤ V
I
−V
O
≤ 40 V 1 Reg
line
− 0.02 0.07 %/V
Load Regulation (Note 3), 10 mA ≤ I
O
≤ I
max
V
O
≤ 5.0 V
V
O
≥ 5.0 V
2 Reg
load
−
−
20
0.3
70
1.5
mV
% V
O
Temperature Stability (T
low
≤ T
J
≤ T
high
) 3 T
S
− 0.7 − % V
O
Minimum Load Current to Maintain Regulation (V
I
−V
O
= 40 V) 3 I
Lmin
− 3.5 10 mA
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
3 I
max
1.5
0.15
2.2
0.4
−
−
A
RMS Noise, % of V
O
, T
A
= +25°C, 10 Hz ≤ f ≤ 10 kHz − N − 0.003 − % V
O
Ripple Rejection, V
O
= 10 V, f = 120 Hz (Note 5)
Without C
Adj
C
Adj
= 10 mF
4 RR
−
66
65
80
−
−
dB
Thermal Shutdown (Note 6) − − − 180 − °C
Long−Term Stability, T
J
= T
high
(Note 7), T
A
= +25°C for
Endpoint Measurements
3 S − 0.3 1.0 %/1.0
kHrs.
Thermal Resistance Junction−to−Case, T Package −
R
q
JC
− 5.0 − °C/W
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, T
low
to T
high
= −55° to +150°C, for
NCV317BT, 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. 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.
5. C
Adj
, when used, is connected between the adjustment pin and ground.
6. Thermal characteristics are not subject to production test.
7. 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.
