I am using a LM338 to make a voltage regulator, this regulator is of the variable type.
The Input of the LM338 has the incoming voltage to be regulated and a 10uF capacitor going to ground. There is a small resistor from the Output of the LM338 to the Adj pin of the LM338. There is also a 100uF cap from the Output to ground. A 5K Reostat is attached to the Adj pin to ground, this allows me to adjust the output voltage to what ever I need.
Okay here is my problem, when I put a load on the output of the voltage regulator it causes my output voltage to drop drastically. I need to achieve 3.5 Volts and a maximum of 3.5 Amps from the voltage regulator, so this would mean that the load would have to be 1 Ohm. When I placed a 1 ohm resistor from the output of the LM338 to ground the volatage across the 1 ohm resistor dropped to .7V instead of 3.5V
Any suggestions on how to fix my problem are greatly welcome. Thankyou.
Todd
The Input of the LM338 has the incoming voltage to be regulated and a 10uF capacitor going to ground. There is a small resistor from the Output of the LM338 to the Adj pin of the LM338. There is also a 100uF cap from the Output to ground. A 5K Reostat is attached to the Adj pin to ground, this allows me to adjust the output voltage to what ever I need.
Okay here is my problem, when I put a load on the output of the voltage regulator it causes my output voltage to drop drastically. I need to achieve 3.5 Volts and a maximum of 3.5 Amps from the voltage regulator, so this would mean that the load would have to be 1 Ohm. When I placed a 1 ohm resistor from the output of the LM338 to ground the volatage across the 1 ohm resistor dropped to .7V instead of 3.5V
Any suggestions on how to fix my problem are greatly welcome. Thankyou.
Todd