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LM317/LM350/LM338 Calculator

Target Output Voltage (V):
Value R1 (Ohm):
Additional
Load Current (A):
Input Voltage (V):
R2 preferred series:
Chip LM317T LM350T LM338T
* Depends on the chip manufacturer
Output Voltage 1.2...37 V 1.2...33 V 1.2...33 V
Max. Output Current 1.5 A 3 A 5 A
Max. Input Voltage 40 V 35 V 35 V
Max. power dissipation 15-20 W * 25-50 W * 25-50 W *
Temperature Range 0° - 125°С 0° - 125°С 0° - 125°С
Package TO-220 TO-220 TO-220
Documentation PDF1, PDF2 PDF PDF
Suresh 2014-08-13 09:15:11
i need 12v 1.3amp circuit and
16.5v 800ma circuit.

i tried with lm317,lm350,lm338 with heat sink.
but all are getting more heat while i cross above 200ma. if i use more than 200ma LM338 getting burn.

need help....

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↑ 0 ↓
RaBa 2013-12-24 19:33:14
Very Useful Calculator.
Clear Calculations.
Thanks..

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↑ 0 ↓
Arslan 2013-11-19 08:53:49
very usefull calculator
many thanks

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↑ +1 ↓
rafal 2013-10-24 23:28:59
Nice and usefull thanks!

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↑ +4 ↓
Angelo.E 2013-09-24 23:33:49
very well thought out!!!!
congratulations

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↑ -1 ↓
yair 2013-07-24 14:01:19
most clear calculator for LM317

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↑ -1 ↓
Abody.abydY 2013-04-30 02:18:05
Its nice, Thank you

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↑ +2 ↓

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