LM317M
V
out
V
in
LM317M
I
L
Adjust
240
1%
R
1
V
ref
R
L
V
I
I
Adj
+
C
in
0.1µF
C
O
1µF
V
O
I
SET
R
2
1%
To Calculate R :
2
R + 1.250 V
*Pulse Testing Required:
1% Duty Cycle is suggested.
V
= I
out SET 2
Assume I
= 5.25 mA
SET
Figure 5. Standard Test Circuit
24V
14V
V
out
V
in
V
out
= 10 V
LM317M
f = 120 Hz
D *
1
240
1%
Adjust
R
1
R
L
1N4002
+
C
in
0.1µF
C
O
1.0µF
V
O
**
C
+
1.65K
1%
10µF
R
2
Adj
Ă*ĂD Discharges C if Output is Shorted to Ground.
1
Adj
**C provides an AC ground to the adjust pin.
Adj
Figure 6. Ripple Rejection Test Circuit
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5