I'm attempting to use an LT3467 to generate a regulated +/-15V from a 9V supply. I'm using this schematic as outlined in the datasheet:
I have this circuit built on a breadboard and it is working well. It's holding a steady +/-15V @ 350mA load (roughly 175mA per rail). I'd like to be able to set the output voltage by way of a 3 position slide switch, each position connected to a different value R1 resistor, as illustrated in this schematic:
My questions are:
1. Will there be any risk of damage to the LT3467 if the selector switch was to change to a different position while powered on? I'm thinking possibly if it were to drop down from 15V output to 12V output for example.
2. Can someone explain to me what the purpose of the 1 ohm resistors are? My first thought is that they'd need to be able to dissipate a lot of power (like 15V x 175mA = 2.6W) which would make them quite large, although maybe that's not the case. Am I thinking about this correctly?
Thanks for any help!