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LM317M Datasheet(PDF) 5 Page - ON Semiconductor

Part No. LM317M
Description  500 mA Adjustable Output, Positive Voltage Regulator
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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LM317M Datasheet(HTML) 5 Page - ON Semiconductor

 
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LM317M
http://onsemi.com
5
*Pulse Testing Required:
1% Duty Cycle is suggested.
Load Regulation (mV) = VO (min Load) −VO (max Load)
Load Regulation (% VO) =
VO (min Load) − VO (max Load)
X 100
VO (min Load)
VO (max Load)
LM317M
Cin
0.1
mF
Adjust
R2
1%
CO
1.0
mF
+
*
RL
(max Load)
RL
(min Load)
Vout
R1
240
1%
Vin
Vin
IAdj
IL
Figure 4. Load Regulation and
DIAdj/Load Test Circuit
VO (min Load)
*Pulse Testing Required:
1% Duty Cycle is suggested.
LM317M
Vin
Vout
Adjust
R1
240
1%
+
1
mF
CO
RL
Cin
R2
1%
To Calculate R2:
Vout = ISET R2 + 1.250 V
Assume ISET = 5.25 mA
IL
IAdj
ISET
Vref
VO
VI
0.1
mF
Figure 5. Standard Test Circuit
LM317M
Vin
Vout
Vout = 10 V
RL
Cin
0.1
mF
Adjust
R1
240
1%
D1 *
1N4002
CO
+
1.0
mF
24V
14V
R2
1.65K
1%
CAdj
10
mF
+
*D1 Discharges CAdj if Output is Shorted to Ground.
**CAdj provides an AC ground to the adjust pin.
f = 120 Hz
VO
**
Figure 6. Ripple Rejection Test Circuit


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