LR8N3 Regulator -- Bypass the ADJ pin

[jackinnj]

Just running out to hear Iphigenie -- but here's a graph of the LR8N3 regulator with and without the adjust pin bypassed. For comparison I have thrown in the LastPAS Regulator as well.

Clearly there are more tweaks for this TO-92 device -- but it is looking pretty good:

[IMGHTTPDEAD]http://www.tech-diy.com/RegPowerSupplies/LR8N3_Bypass.gif[/IMGHTTPDEAD]

 

[jackinnj]

I thought that there was something wrong with that chart -- so used a 680uF cap to cure the F3 problem. Here's the new chart:

[IMGDEAD]http://www.tech-diy.com/RegPowerSupplies/LR8N3_Bypass2.gif[/IMGDEAD]

Here's the test setup which I used -- the switch is closed when the electrolytic is discharged to about 20V -- this makes it safe to connect to the HP3581.

[IMGDEAD]http://www.tech-diy.com/RegPowerSupplies/Measure_Setup.gif[/IMGDEAD]