LM317L
V
CC
Line Regulation (%/V) =
*
V
IH
V
IL
V
in
LM317L
V
out
V
OH
− V
OL
V
OL
x 100
V
OH
V
OL
Adjust
C
in
0.1mF
I
Adj
R
1
240
1%
C
O
R
L
+
1mF
* Pulse Testing Required:
1% Duty Cycle is suggested.
R2
1
%
Figure 1. Line Regulation and
DI
Adj
/Line Test Circuit
Load Regulation (mV) = V
O
(min Load) −V
O
(max Load)
V
O
(min Load) − V
O
(max Load)
Load Regulation (% V
O
) =
V
O
(min Load)
V
in
*
V
in
LM317L
V
out
I
L
X
100
V
O
(min Load)
V
O
(max Load)
Adjust
C
in
0.1mF
I
Adj
R
1
240
1%
+
C
O
1.0mF
R
L
(max Load)
*
R
L
(min Load)
* Pulse Testing Required:
1% Duty Cycle is suggested.
R
2
1%
Figure 2. Load Regulation and
DI
Adj
/Load
Test Circuit
V
in
LM317L
V
out
I
L
Adjust
R
1
I
Adj
V
I
C
in
0.1mF
I
SET
Pulse Testing Required:
1% Duty Cycle is suggested.
R
2
1%
240
1%
V
ref
+
C
O
1mF
R
L
V
O
To Calculate R
2
:
V
out
= I
SET
R
2
+ 1.250 V
Assume I
SET
= 5.25 mA
Figure 3. Standard Test Circuit
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