TI confirmed that there is a problem with the device or the datasheet.

http://focus.ti.com/lit/ds/symlink/lm317l.pdf

Our engineer: "The data-sheet for the LM317LCPWR specifies that all outputs 
are internally connected. However, when we built a prototype using this part 
only one pin was actually an output. Can you explain this discrepancy?"

TI support: "The PW package only has pin 6 connected as a ground pin. This 
issue will be corrected; either the data sheet or future product will be 
change to match the other. I do not know which at this time. It is 
recommended that the circuit board short pins 2, 3, 6, & 7.  If this is not 
practical, use pin 6 as a ground. Do not connect pins 2, 3, 7 to any voltage 
other than that on pin 6."

Note: pin 6 is "OUTPUT", I assume the TI rep misspoke.

Best regards,

Vitaliy Maksimov
ScanTool.net, LLC
+1 623 582-2366
http://www.scantool.net 

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist