Datasheet

ADJUST
OUTPUTINPUT
V
I
R1
LM317
I
limit
+
1.2
R1
C1
0.1 µF
C3
1 µF
R1
240 Ω
INPUT OUTPUT
ADJUST
LM317
V
O
V
I
D1
1N4002
(see Note A)
R2
5 kΩ
C2
10 µF
NOTE A: D1 discharges C2 if the output is shorted to ground.
C1
0.1 µF
R1
120 Ω
R2
3 kΩ
INPUT OUTPUT
ADJUST
LM317
V
O
+35 V
R3
680 Ω
−10 V
Since I
Adj
typically is 50 µA, it is negligible in most applications.
V
O
+ V
ref
ǒ
1 )
R2 ) R3
R1
Ǔ
) I
Adj
(R2 ) R3) – 10 V
V
O
is calculated as:
LM317
SLVS044V –SEPTEMBER 1997–REVISED FEBRUARY 2013 www.ti.com
Figure 2. 0-V to 30-V Regulator Circuit
Figure 3. Adjustable Regulator Circuit With Improved Ripple Rejection
Figure 4. Precision Current-Limiter Circuit
8 Submit Documentation Feedback Copyright © 1997–2013, Texas Instruments Incorporated
Product Folder Links: LM317