View cs5160.rev3 datasheet:

CS5160 CPU 5-Bit Synchronous Buck Controller Description Features The CS5160 is a 5-bit synchronous The CS5160 is specifically designed Dual N-Channel Design dual N-Channel buck controller to power Pentium® III processors Excess of 1MHz Operation designed to provide unprecedented and other high performance core transient response for today’s logic. They include the following 100ns Transient Response demanding high-density, high- features: on board 5-bit DAC, short 5-Bit DAC speed logic. It operates using a pro- circuit protection, 1.0% output tol- Backward Compatible with prietary control method which erance with 0.8% tolerance at 1.3V CS515X Family allows a 100ns response time to outputs, VCC monitor, and pro- load transients. The CS5160 is grammable soft start capabi