LM317CM Vishay, LM317CM Datasheet - Page 3

• Manufacturer Part Number: LM317CM
• Description: 3-terminal Adjustable Output Positive Voltage Regulators
• Manufacturer: Vishay

Document Number 74809
29-Nov-01
V
Pulse Testing Required:
1% Duty Cycle is Suggested
I
Pulse Testing Required:
1% Duty Cycle is Suggested
V
in
0.1 F
C
Fig. 1 – Line Regulation Test Circuit
0.1 F
in
C
in
V
Fig. 3 – Standard Test Circuit
LM317
V
IH
I
I
IL
ADJ
SET
V
1%
R2
Adjust R1
in
V
Line Regulation (%/V) =
out
LM317
I
ADJ
240
1%
1%
R2
Adjust R1
V
To Calculate R2:
V o = I
Assume I
V
ref
out
SET
I
L
1 F
C
240
SET
1%
V
o
R2 + 1.250V
OH
V
= 5.25mA
OL
-- V
1 F
C
o
OL
RL
V
x100
V
OH
OL
RL
V
o
V
0.1 F
f = 120H
C
I
in
Pulse Testing Required:
1% Duty Cycle is Suggested
24V
14V
*
Output is Shorted to Ground
D1 Discharges C
Load Regulator (mV) = Vo(min. Load) -- Vo(max. Load)
Load Regulator (%Vo) =
0.1 F
V
V
C
Z
in
in
in
Fig. 4 – Ripple Rejection Test Circuit
LM317
LM317
I
Fig. 2 – Load Regulation and
ADJ
ADJ
Adjust
1%
1%
Adjust R1
R2
R2
if
I
adj
Vo(min. Load) -- Vo(max. Load)
V
V
/Load Test Circuit
R1
out
out
Vishay Semiconductor
10 F
Vo(min. Load)
C
240
240
1%
1%
Adj
I
L
1 F
C
o
*
1N4002
Part Number
D1
1 F
C
o
V
o
= 10V
www.vishay.com
x100
V
V
OH (min. Load)
RL
OL (max. Load)
Load)
(min.
RL
V
o
3