CS51311

CS51311 CS51311 Synchronous CPU Buck Controller for 12V and 5V Applications Description The CS51311 is a synchronous dual NFET Buck Regulator Controller. It is designed to power the core logic of the latest high performance CPUs. It TM uses the V2 control method to achieve the fastest possible transient response and best overall regulation. It incorporates many additional features required to ensure the proper operation and protection of the CPU and Power system. The CS51311 provides the industry’s most highly integrated solution, minimizing external component count, total solution size, and cost. The CS51311 is specifically designed to power Intel’s Pentium® II processor and includes the following features: 5-bit DAC with 1.2% tolerance, Power-Good output, over-current hiccup mode protection, VCC monitor, soft start, adaptive voltage positioning, adaptive FET non-overlap time, and remote sense. The CS51311 will operate over an 8.4V to 14V range and is available in 14 lead narrow body surface mount package. Features s Synchronous Switching Regulator Controller for CPU VCORE s Dual N-Channel MOSFET Synchronous Buck Design s V2 TM Control Topology s 200ns Transient Loop Response s 5-bit DAC with 1.2% Tolerance s Hiccup Mode Overcurrent Protection s 40ns Gate Rise and Fall Times (3.3nF load) s 65ns Adaptive FET Non-overlap Time s Adaptive Voltage Positioning s Power-Good Output Monitors Regulator Output Application Diagram +12V +5V s VCC Monitor Provides Under Voltage Lock...