LM317
3-TERMINAL ADJUSTABLE REGULATOR
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SLVS044R–SEPTEMBER 1997–REVISED APRIL 2007
APPLICATION INFORMATION (continued)
LM317
INPUT OUTPUT
0.2 Ω
0.2 Ω
0.2 Ω
V
I
ADJUST
LM317
INPUT
OUTPUT
ADJUST
4.5 V to 25 V
LM317
INPUT
OUTPUT
ADJUST
5 kΩ
5 kΩ
100 Ω
_
TL080
+
150 Ω
2N2905
200 pF
1.5 kΩ
Figure 13. Adjustable 4-A Regulator Circuit
TIP73
2N2905
500 Ω
V
I
5 kΩ
LM317
22 Ω
V
O
INPUT
OUTPUT
ADJUST
120 Ω
1N4002
See
Note A
10 µF
47 µF
10 µF
(see Note B)
NOTES: A. The minimum load current is 30 mA.
B. This optional capacitor improves ripple rejection.
Figure 14. High-Current Adjustable Regulator Circuit
12
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