View cs5166.rev2 datasheet:

CS5166 5-Bit Synchronous CPU Controller with Power-Good and Current Limit Description Features TM V2 Control Topology The CS5166 is a synchronous The CS5166 is specifically dual NFET Buck Regulator designed to power Intel’s Dual N-Channel Design Controller. It is designed to pow- Pentium® II processor and 125ns Controller Transient Response er the core logic of the latest high includes the following features: performance CPUs. It uses the 5-bit DAC with 1% tolerance, Excess of 1Mhz Operation V2TM control method to achieve Power-Good output, adjustable 5-bit DAC with 1% Tolerance the fastest possible transient hiccup mode over-current pro- Power-Good Output with Internal response and best overall regula- tection, VCC monitor, Soft Start, Delay tion. It incorporate