The RT8809 is a dual-phase synchronous Buck PWM
controller with integrated drivers which are optimized for
high-performance graphic microprocessor and computer
applications. The IC integrates a G-NAVPTM PWM
controller, two 12V MOSFET drivers with internal bootstrap
diodes, as well as output current monitoring and protection
functions into the WQFN-24L 4x4 package. The RT8809
adopts DCR and RDS(ON) current sensing. Load line voltage
positioning (droop) and over-current protection are
accomplished through continuous inductor DCR current
sensing, while RDS(ON) current sensing is used for accurate
channel-current balance. Using both methods of current
sampling utilizes the best advantages of each technique.资料下载
