RT9214PS [RICHTEK]

The RT9214 is a high efficiency synchronous buck PWM controller that generates logic-supply voltages in PC-based systems. These high performance, single output devices include internal soft-start, frequency compensation networks and integrate all of the control, output adjustment, monitoring and protection functions into a single package. The device operates at a fixed 300kHz frequency, providing an optimum compromise between efficiency, external component size, and cost. Adjustable over-current protection monitors the voltage drop across the RDS(ON) of the lower MOSFET, eliminating the need for a current sense resistor. The over current function cycles the soft-start in 4-times hiccup mode for fault protection.