View cs51313.rev5 datasheet:

CS51313 Synchronous CPU Buck Controller Capable of Implementing Multiple Linear Regulators Description Features The CS51313 is a synchronous dual The CS51313 is specifically designed to Synchronous Switching NFET Buck Regulator Controller. It is power Intel’s Pentium® II processor and Regulator Controller for CPU designed to power the core logic of the includes the following features: 5-bit VCORE latest high performance CPUs. It uses the DAC with 1.2% tolerance, Power-Good TM Dual N-Channel MOSFET V2 control method to achieve the output, overcurrent hiccup mode protec- Synchronous Buck Design fastest possible transient response and tion, over voltage protection, VCC moni- best overall regulation. It incorporates tor, Soft Start, adaptive voltage position- V2TM Control Topol