L6984TR

The L6984 synchronous step-down switching regulator can deliver up to 400 mA DC output current.

The purpose of the PGOOD open collector output in the L6984 regulator is to implement output voltage sequencing during the power-up phase .

The L6984 regulator has two operating modes: Low Noise Mode (LNM) and Low Consumption Mode (LCM) . The LCM mode maximizes efficiency at light loads by generating a pulse to regulate the output voltage when it drops, while minimizing current consumption by disabling part of the internal circuitry between bursts . On the other hand, the LNM mode features a constant switching frequency to minimize noise in the final application and a constant voltage ripple at fixed input voltage, making it suitable for low noise applications like car audio and sensors . In summary, the L6984 regulator offers the LCM mode for maximizing efficiency at light loads and the LNM mode for minimizing noise in low noise applications .