App note: Using the LTM2881 as an Isolated 5V power supply

Here is an app note from Linear Technology on how to use their LTMM2881 isolated RS485 transceiver as a isolated 5v power supply. The LTMĀ®2881 is an isolated RS485 transceiver that guards against large ground-to-ground differentials. An onboard DC/DC converter provides isolated 5V power to the output.