LM317T replacement

Thread Starter

kaushizcute

Joined Feb 16, 2012
24
I have made a basic adjustable regulator circuit using LM317T which has a resistor connected between Vref and Vout and then a potentiometer.

As LM317T is TO-220 so the size is big for my purpose.

Can it be replaced by LM317LZ which is TO-92.
My input is 12V and required output is 3.6V, 140mA.
 

MrChips

Joined Oct 2, 2009
19,384
No. The problem is the large voltage drop of 8.4V.
The device has to dissipate 1.2W. The TO-92 package cannot dissipate this amount of power and will get very hot.
 
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