On 18 Jan 2010 at 15:59, dwight elvey wrote:
that Lambda wanted to take advantage of two things.
2.5 volts is a typical output
of a band-gap reference and the
lower voltage meant that two less resistors were needed for
voltages below 7 volts.
I believe that the "stock" 723 uses a 6.2V zener as a reference.
Another possibility would be that they wanted a regulator that would
operate with lower supply headroom, particularly for low voltages. .
In any case, you're right about the part labeling. It is confusing.