The RT8884B is a 4/3/2/1 multi-phase synchronous Buck
controller designed to meet Intel VR12.5 compatible CPU
specification with a serial VID control interface. The
RT8884B adopts G-NAVPTM (Green Native AVP) which is
Richtek's proprietary topology derived from finite DC gain
of EA amplifier with current mode control, making it easy
to set the droop to meet all Intel CPU requirements of
AVP (Adaptive Voltage Positioning). Based on the GNAVPTM
topology, the RT8884B also features a quick
response mechanism for optimized AVP performance
during load transient. The RT8884B supports mode
transition function with various operating states. A Serial
VID (SVID) interface is built in the RT8884B to
communicate with Intel VR12.5 compliant CPU. The
RT8884B supports VID on-the-fly function with three
different slew rates : Fast, Slow and Decay. By utilizing
the G-NAVPTM topology, the operating frequency of the
RT8884B varies with VID, load current and input voltage
to further enhance the efficiency even in CCM. Besides
G-NAVPTM, the CCRCOT (Constant Current Ripple
Constant On Time) technology provides superior output
voltage ripple over the entire input/output range.资料下载
