LM317M
IAdj, ADJUSTMENT PIN CURRENT (
μ
A)
1.260
Vref, REFERENCE VOLTAGE (V)
80
70
65
60
55
50
45
40
35
−50
−25
0
25
50
75 100 125
T
J
, JUNCTION TEMPERATURE (°C)
150
−50
−25
0
25
50
75
100
125
150
V
in
= 6.25 V
V
out
= V
ref
I
L
= 10 mA
I
L
= 100 mA
1.250
1.240
1.230
V
in
= 4.2 V
V
out
= V
ref
I
L
= 5.0 mA
1.220
T
J
, JUNCTION TEMPERATURE (°C)
Figure 13. Temperature Stability
Figure 14. Adjustment Pin Current
Δ
Vout , OUTPUT VOLTAGE CHANGE (%)
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
−1.0
−50
NOISE VOLTAGE (
μ
V)
V
in
= 4.25 V to 41.25 V
V
out
= V
ref
I
L
= 5.0 mA
Bandwidth 100 Hz to 10 kHz
10
8.0
6.0
4.0
−25
0
25
50
75 100 125
T
J
, JUNCTION TEMPERATURE (°C)
150
−50
−25
0
25
50
75
100
125
150
T
J
, JUNCTION TEMPERATURE (°C)
Figure 15. Line Regulation
Figure 16. Output Noise
Δ
Vout , OUTPUT VOLTAGE
DEVIATION (V)
Δ
Vout , OUTPUT VOLTAGE
DEVIATION (V)
3.0
2.0
1.0
0
V
in
= 15 V
V
out
= 10 V
I
NL
= 50 mA
T
J
= 25°C
CL = 1.0
mF;
CAdj = 10
mF
1.5
1.0
0.5
0
−0.5
−1.0
−1.5
1.0
0.5
0
0
10
20
t, TIME (ms)
V
in
30
40
V
out
= 10 V
I
L
= 50 mA
T
J
= 25°C
C
L
= 1.0
mF
−1.0
−2.0
−3.0
1.5
1.0
0.5
0
0
10
20
t, TIME (ms)
30
I
L
C
L
= 0.3
mF;
C
Adj
= 10
mF
Δ
Vin , INPUT VOLTAGE
CHANGE (V)
C
L
= 0
I L , LOAD
CURRENT (A)
40
Figure 17. Line Transient Response
Figure 18. Load Transient Response
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