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LM317CM Datasheet(PDF) 3 Page - Vishay Siliconix

Part No. LM317CM
Description  3-Terminal Adjustable Output Positive Voltage Regulators
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
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 3 page
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Part Number
Vishay Semiconductor
Document Number 74809
www.vishay.com
29-Nov-01
3
Vin
VI
Vout
Cin
0.1
µF
Co
1
µF
Adjust R1
R2
1%
240
1%
LM317
RL
(min.
Load)
VOH (min. Load)
VOL (max. Load)
Pulse Testing Required:
1% Duty Cycle is Suggested
Vin
Vout
Cin
0.1
µF
Co
1
µF
Adjust R1
R2
1%
240
1%
LM317
RL
VIH
VIL
VOH
VOL
Pulse Testing Required:
1% Duty Cycle is Suggested
Vin
Vout
Cin
0.1
µF
Co
1
µF
Adjust R1
R2
1%
240
1%
RL
Pulse Testing Required:
1% Duty Cycle is Suggested
To Calculate R2:
Vo = ISET R2 + 1.250V
Assume ISET = 5.25mA
Fig. 3 – Standard Test Circuit
LM317
Vin
Vout
Vo = 10V
Cin
0.1
µF
Co
1
µF
Adjust
R1
R2
1%
240
1%
RL
Fig. 4 – Ripple Rejection Test Circuit
LM317
CAdj
10
µF
*D1 Discharges CADJ if
Output is Shorted to Ground
*D1
1N4002
24V
14V
f = 120HZ
IADJ
VI
IADJ
ISET
Vref
IL
Vo
Vo
IL
IADJ
Fig. 2 – Load Regulation and
∆Iadj/Load Test Circuit
Fig. 1 – Line Regulation Test Circuit
Line Regulation (%/V) =
x100
VOH -- VOL
VOL
Load Regulator (mV) = Vo(min. Load) -- Vo(max. Load)
Load Regulator (%Vo) =
x100
Vo(min. Load) -- Vo(max. Load)
Vo(min. Load)




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