Demonstration circuit 2624A features the LT3094, an ultralow noise, ultrahigh power supply rejection ratio (PSRR) negative low dropout (LDO) regulator. DC2624A operates over an input range of –3.8 V to –20 V, and can deliver up to 500 mA output current. It features ultralow noise (0.8 uVRMS from 10Hz to 100kHz) and very high PSRR (75dB at 1MHz).