I need a small boost regulator: Input can be either 3.3V or 5V
(both supplies avaliable on the PCB, doesn't matter which I
use) and the output is +48V @ about 20 mA, regulated.  Does
anyone have a "favorite" chip that they would recommend for
this job?  It would be great to find one with an on-chip
switching device, but I can't seem to find anything that can
handle the +48 volts without an external transistor.
All suggestions appreciated!
Brian Aase

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