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LM317 Datasheet(PDF) 4 Page - ON Semiconductor

Part No. LM317
Description  1.5 A Adjustable Output, Positive Voltage Regulator
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LM317 Datasheet(HTML) 4 Page - ON Semiconductor

 
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LM317, NCV317
http://onsemi.com
4
Figure 4. Load Regulation and
DIAdj/Load Test Circuit
Figure 5. Standard Test Circuit
Figure 6. Ripple Rejection Test Circuit
VO
LM317
VO (min Load) − VO (max Load)
*Pulse testing required.
* 1% Duty Cycle is suggested.
Load Regulation (mV) = VO (min Load) − VO (max Load)
Load Regulation (% VO) =
x 100
VO (min Load)
VO (max Load)
Cin
0.1
mF
Adjust
R2
1%
CO
1.0
mF
+
*
RL
(max Load)
RL
(min Load)
Vout
R1
240
1%
VI
Vin
IAdj
IL
* Pulse testing required.
* 1% Duty Cycle is suggested.
Vin
Vout
Adjust
R1
240
1%
+
1.0
mF
CO
RL
Cin
R2
1%
To Calculate R2: Vout = ISET R2 + 1.250 V
To Calculate R2: Assume ISET = 5.25 mA
IL
IAdj
ISET
Vref
VO
VI
0.1
mF
Vin
Vout
Vout = 10 V
RL
Cin
0.1
mF
Adjust
R1
240
1%
D1*
1N4002
CO
+
1.0
mF
24 V
14 V
R2
1.65 k
1%
CAdj
10
mF
+
*D1 Discharges CAdj if output is shorted to Ground.
f = 120 Hz
LM317
LM317
VO (min Load)


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