A6986 Step-Down Switching Regulator

STMicroelectronics A6986 Synchronous Step-Down Switching Regulator is a step-down monolithic switching regulator able to deliver up to 2A DC. The output voltage adjustability ranges from 0.85V to V_IN. The 100% duty cycle capability and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. The Low Consumption Mode (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light load with controlled output voltage ripple. The Low Noise Mode (LNM) makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the low noise application specification like car audio. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA). The RST open collector output can also implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. Pulse by pulse current sensing on both power elements implements an effective constant current protection.