richtek 电脑主板电源ic rt8105gs

the rt8105 is a high efficiency synchronous buck pwm controllers that generate logic-supply voltages in pc based systems. these high performance , single output devices include internal soft-start, frequency compensation networks and integrates all of the control, output adjustment, monitoring and protection functions into a single package.
the device operating at fixed 300khz frequency provides an optimum compromise between efficiency, external component size, and cost.
adjustable over-current protection (ocp) monitors the voltage drop across the rds(on) of the lower mosfet for synchronous buck pwm dc-dc controller. the overcurrent function cycles the soft-start in 4-times hiccup mode to provide fault protection, and in an always hiccup mode for under-voltage protection.