I need to save space on PCB and have to convert voltage from +48 to +9, -9 and virtual ground. Is there a single IC that could do that?
Electronic – Voltage regulator IC with positive and negative voltage output
voltage-regulator
voltage-regulator
I need to save space on PCB and have to convert voltage from +48 to +9, -9 and virtual ground. Is there a single IC that could do that?
Best Answer
You could do it, for just a few milliamps, with two zeners and a resistor.
If you did it this way you could probably get away with a 1206 SMD resistor (0.5W) and a dual series SOT23 zener, in total smaller than most linear regulator packages. Here is a possible circuit (output is 9.1V per rail):