Part of my circuit needs -12v. What would be the simplest way to get this, considering I have a +12v supply already available in the circuit? I need ~500ma
I searched for -12v regulators on Mouser, but many of these needed a negative voltage input.
Ideally looking for an IC that can handle this.
Best Answer
There are a number of ways to get a negative, below ground supply.
The Texas Instruments TPS54620 is a step-down (buck) converter, which can be configured to provide a voltage below ground, e.g. this circuit from Digikey.
An Analog Devices LT8331 could supply 80 mA at - 12 VDC.
An inverting charge-pump such as the Microchip TC1044S can 20 mA, if that meet your needs.
It is even possible to use the 555 timer/oscillator to get -12 VDC, though regulation would not be good.