LM 317 IC
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LM 317 IC
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LM 317 Power supply
 The output is adjustable between 1.25 and 13.5 Volts with a
maximum current limit of 1.5 Amps.
 The LM317K regulator is internally protected from current and
thermal overloads.
 A heat sink will be required for most applications however.
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LM 317 Power supply
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LM 317 Power supply parts list
Parts List
R1
220 Ω
R2
2 KΩ Variable Resistor
C1
3300 µf 50v
C2
10 µf 25v
C3
1 µf 25v
C4
0.1 µf
D1
100V 5A bridge rectifier
D2
IN 4007
D3
IN 4007
IC1
LM 317
T1
18 VAC 2AMP
F
250mA
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LM 317 Regulator Pin out
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LM 317 Power supply
 The diodes D2 and D3 in the circuit prevent damage to the
regulator during certain adverse conditions such as the output
voltage being higher than the input voltage to the regulator
or the capacitor across R2 from discharging through the
adjustment terminal of the regulator.
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LM 317 Power supply Output voltage
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LM 317 IC Front view
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DC power supply using LM-317 IC circuit diagram
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LM 317 IC calculator
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LM 317 Voltage Regulator calculator
 This Voltage Regulator Calculator will work for most voltage
regulators with a reference voltage (VREF) of 1.25.
 For the LM338 and LM350 regulators, 120 ohms is typically
used for R1.
 However, other values such as 150 or 220 ohms can also be used
for R1.
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LM 317 Voltage Regulator calculator
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LM 317 Current Regulator calculator
 This Current Regulator Calculator will work for adjustable regulators
with a reference voltage (VREF) of 1.25.
 To determine the output current from the regulator, enter a value for
the program resistor (R1) in ohms and press the "Calculate" button.
 This will calculate the Output Current in Amperes and the amount
of Power Dissipated across R1 in Watts.
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LM 317 Current Regulator calculator
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The End
…… Thank You …….
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