NCP5331

The NCP5331 is a second-generation, two-phase, buck controller that incorporates advanced control functions to power 64-bit AMD Athlon processors and low voltage, high current power supplies. Proprietary multiphase architecture guarantees balanced load-current sharing, reduces output voltage and input current ripple, decreases filter requirements and inductor values, and increases output current slew rate. Traditional Enhanced V2 has been combined with an internal PWM ramp and voltage feedback directly from VCORE to the internal PWM comparator. These features and enhancements of NCP5331 deliver the fastest transient response, reduce output voltage jitter, provide greater design flexibility and portability, and minimize overall solution cost. Advanced features include adjustable power- good delay, programmable overcurrent shutdown timer, superior overvoltage protection (OVP), and differential remote sensing.

An innovative overvoltage protection (OVP) scheme safeguards the NCP5331 CPU during extreme situations including power up with a shorted upper MOSFET, shorting of an upper MOSFET during normal operation, and loss of the voltage feedback signal, COREFB+.