CS5165A

CS5165A 5−Bit Synchronous CPU Buck Controller The CS5165A synchronous 5−bit NFET buck controller is optimized to manage the power of the next generation Pentium II processors. It’s V2t control architecture delivers the fastest transient response (100 ns), and best overall voltage regulation in the industry today. It’s feature rich design gives end users the maximum flexibility to implement the best price/performance solutions for their end products. The CS5165A has been carefully crafted to maximize performance and protect the processor during operation. It has a 5−bit DAC on board that holds a ±1.0% tolerance over temperature. Its on board programmable Soft−Start insures a control startup, and the FET nonoverlap circuitry ensures that both FETs do not conduct simultaneously. The on board oscillator can be programmed up to 1.0 MHz to give the designer maximum flexibility in choosing external components and setting systems costs. The CS5165A protects the processor during potentially catastrophic events like overvoltage (OVP) and short circuit. The OVP feature is part of the V2 architecture and does not require any additional components. During short circuit, the controller pulses the MOSFETs in a “hiccup” mode (3.0% duty cycle) until the fault is removed. With this method, the MOSFETs do not overheat or self destruct. The CS5165A is designed for use in both single processor desktop and multiprocessor workstation and server applications. The CS5165A’s current sharing capabilit...