RT8801

Preliminary RT8801 Multi-Phase PWM Controller for CPU Core Power Supply with Serial Programming Interface General Description The RT8801 is a multi-phase synchronous buck controller which is implemented with full control functions for Intel® VR10.0/10.1-compliant CPU. The RT8801 could be operated with 2, 3 or 4 buck switching stages operating in interleaved phase set automatically. The multiphase architecture provides high output current while maintaining www.DataSheet4U.com low power dissipation on power devices and low stress on input and output capacitors. RT8801 is one of RichTek CPU core power solutions which integrates a specific series programming interface for the controller operation configuration. There are several registers implemented for the specific parameters configuration including VID for core power, and signal for load current indication. User can program the configuration of the parameters easily via the specific programming interface. With the implementation of RT8801, the part provides more flexibility and feature for customers advanced segment product design. The RT8801 applies the DCR sensing technology newly as well; with such a topology, the RT8801 extracts the DCR of output inductor as sense component to deliver a more precise load line regulation and better thermal balance for next generation processor application. For current sense setting, droop tuning, VCORE initial offset and over current protection are independent to compensation circuit of v...