LM317
3-TERMINAL ADJUSTABLE REGULATOR
SLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001
APPLICATION INFORMATION
LM317
VI
INPUT
OUTPUT
R1
240
Ω
D1
1N4002
(see Note A)
C3
1
µF
R2
5 kΩ
C2
10
µF
VO
ADJUST
C1
0.1
µF
NOTE A: D1 discharges C2 if the output is shorted to ground.
Figure 3. Adjustable Regulator Circuit With Improved Ripple Rejection
LM317
VI
INPUT
OUTPUT
R1
I
limit
+
1.2
R1
ADJUST
Figure 4. Precision Current-Limiter Circuit
R2
720
Ω
ADJUST
VI
INPUT
OUTPUT
R1
240
Ω
LM317
LM317
OUTPUT
INPUT
ADJUST
VO
R3
120
Ω
C1
0.1
µF
C2
1
µF
Output
Adjust
R4
1 kΩ
Figure 5. Tracking Preregulator Circuit
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
5
TI [ TEXAS INSTRUMENTS ]
