This circuit is from a documentation about the MC1723, Motorola equivalent of the well-known 723. The transistor admits equivalent and must be mounted in a good heat sink.
August 2017 - Mouser Electronics is supplying Vishay's new high-speed, high-sensitivity...
This circuit shows how to add a 1st regulator to a source that already has a step for this...
This circuit is from a Maxim manual and can be used to power shields from batteries. The circuit...