I placed an order for parts a couple of weeks ago and ordered a few L78L33's and L78L05's for times when current demand was low and space was tight.
I have used the LM78XX series in the past with no issues but I am having a problem with these.
Data sheet and wiring diagram are here:
http://www.taydaelectronics.com/datasheets/A-492.pdf
I have wired them as per diagram except in place of the .33uf on the "IN" side I have used a .47uf. I am using an led pulling about 15 ma for a load.
The power supply is set at 6 vdc.
On the 3.3 (and I tried three of them) I am getting 4.6 volts, 5.2 volts and 5.4 volts. Also within a matter of seconds it gets blistering hot.
On the L78L05 with the same setup except power supply set at 9 vdc I am getting 8.4 volts.
Checked with a second VOM and readings the same.
Am I doing something wrong?
I have used the LM78XX series in the past with no issues but I am having a problem with these.
Data sheet and wiring diagram are here:
http://www.taydaelectronics.com/datasheets/A-492.pdf
I have wired them as per diagram except in place of the .33uf on the "IN" side I have used a .47uf. I am using an led pulling about 15 ma for a load.
The power supply is set at 6 vdc.
On the 3.3 (and I tried three of them) I am getting 4.6 volts, 5.2 volts and 5.4 volts. Also within a matter of seconds it gets blistering hot.
On the L78L05 with the same setup except power supply set at 9 vdc I am getting 8.4 volts.
Checked with a second VOM and readings the same.
Am I doing something wrong?