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Synchronous CPU Buck Controller for 12 V Only Applications

The CS51312 is a synchronous dual NFET Buck Regulator Controller. It is designed to power the core logic of the latest high performance CPUs and ASICs from a single 12 V input. It 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 CS51312 provides the industry’s most highly integrated solution, minimizing external component count, total solution size, and cost.

Features

• Synchronous Switching Regulator Controller for CPU VCORE

• Dual N−Channel MOSFET Synchronous Buck Design

• V2 Control Topology

• 200 ns Transient Loop Response

• 5−Bit DAC with 1.2 Tolerance

• Hiccup Mode Overcurrent Protection

• 40 ns Gate Rise and Fall Times (3.3 nF Load)

• 65 ns Adaptive FET Non−Overlap Time

• Adaptive Voltage Positioning

• Power Good Output Monitors Regulator Output

• 5.0 V/12 V or 12 V−Only Operation

• VCC Monitor Provides Undervoltage Lockout

• OVP Output Monitors Regulator Output

• Multifunctional COMP Pin Provides ENABLE, Soft Start, and Hiccup Timing in Addition to Control Loop Compensation