This module has advanced quality...
The stabilizer is useful for circuits you need and 3.3V supply. The regulator is LDO, so it allows you to feed the input at 5V, the other voltage used for electronics. The PCB is small in size and has two input and two output connectors.
UA7912-ST - Negative Voltage Regulator -18 V, 1.5 A
UA7912-ST - Negative Voltage Regulator -12 V, 1.5 A