RP112x Low Noise LDO Regulators Nisshinbo RP112x Low Noise Low-Dropout (LDO) Regulators are CMOS-based regulators with 150mA typical output current. These regulators offer high output voltage accuracy, low supply current, low on-resistance transistor, and low noise output voltage. The RP112x regulators include a voltage reference unit, error amplifier, current limit circuit, and chip enable circuit. These LDO regulators feature ripple rejection as low as 80dB at f=1kHz, 75dB at f=10kHz, and 65dB at f=100kHz.