LM317, NCV317
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2
MAXIMUM RATINGS
Rating Symbol Value Unit
Input−Output Voltage Differential VI−VO−0.3 to 40 Vdc
Power Dissipation
Case 221A
TA = +25°C PDInternally Limited W
Thermal Resistance, Junction−to−Ambient qJA 65 °C/W
Thermal Resistance, Junction−to−Case qJC 5.0 °C/W
Case 936 (D2PAK−3)
TA = +25°C PDInternally Limited W
Thermal Resistance, Junction−to−Ambient qJA 70 °C/W
Thermal Resistance, Junction−to−Case qJC 5.0 °C/W
Operating Junction Temperature Range TJ−55 to +150 °C
Storage Temperature Range Tstg −65 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
ELECTRICAL CHARACTERISTICS (VI−VO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to Thigh (Note 1); Imax and Pmax
(Note 2); unless otherwise noted.)
Characteristics Figure Symbol Min Typ Max Unit
Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ VI−VO ≤ 40 V 1 Regline −0.01 0.04 %/V
Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ Imax
VO ≤ 5.0 V
VO ≥ 5.0 V
2 Regload
−
−
5.0
0.1
25
0.5
mV
% VO
Thermal Regulation, TA = +25°C (Note 4), 20 ms Pulse −Regtherm −0.03 0.07 % VO/W
Adjustment Pin Current 3 IAdj −50 100 mA
Adjustment Pin Current Change, 2.5 V ≤ VI−VO ≤ 40 V,
10 mA ≤ IL ≤ Imax, PD ≤ Pmax
1, 2 DIAdj −0.2 5.0 mA
Reference Voltage, 3.0 V ≤VI−VO ≤ 40 V, 10 mA ≤ IO ≤ Imax, PD ≤ Pmax 3 Vref 1.2 1.25 1.3 V
Line Regulation (Note 3), 3.0 V ≤VI−VO ≤ 40 V 1 Regline −0.02 0.07 % V
Load Regulation (Note 3), 10 mA ≤IO ≤Imax
VO ≤5.0 V
VO ≥ 5.0 V
2 Regload
−
−
20
0.3
70
1.5
mV
% VO
Temperature Stability (Tlow ≤TJ ≤Thigh) 3 TS−0.7 −% VO
Minimum Load Current to Maintain Regulation (VI−VO = 40 V) 3 ILmin −3.5 10 mA
Maximum Output Current
VI−VO ≤ 15 V, PD ≤ Pmax, T Package
VI−VO = 40 V, PD ≤Pmax, TA = +25°C, T Package
3 Imax
1.5
0.15
2.2
0.4
−
−
A
RMS Noise, % of VO, TA = +25°C, 10 Hz ≤f ≤10 kHz −N−0.003 −% VO
Ripple Rejection, VO = 10 V, f = 120 Hz (Note 5)
Without CAdj
CAdj = 10 mF
4 RR
−
66
65
80
−
−
dB
Thermal Shutdown (Note 6) − − − 180 −°C
Long−Term Stability, TJ = Thigh (Note 7), TA = +25°C for
Endpoint Measurements
3 S −0.3 1.0 %/1.0
kHrs.
Thermal Resistance Junction−to−Case, T Package −RqJC −5.0 −°C/W
1. Tlow to Thigh = 0° to +125°C, for LM317T, D2T. Tlow to Thigh = −40° to +125°C, for LM317BT, BD2T, Tlow to Thigh = −55° to +150°C, for
NCV317BT, BD2T.
2. Imax = 1.5 A, Pmax = 20 W
3. Load and line regulation are specified at constant junction temperature. Changes in VO 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. CAdj, 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.