The CS5165A synchronous 5-bit NFET buck controller is optimized to manage the power of the next generation Pentium II processors. It’s V2 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 capability allows the designer to build multiple parallel and redundant power solutions for multiprocessor systems. The CS5165A contains other control and protection features such as Power Good, ENABLE, and adaptive voltage positioning. It is available in a 16 lead SOIC wide body package.
V2 Control Topology Dual N-Channel Design 100 ns Controller Transient Response Excess of 1.0 MHz Operation 5-Bit DAC with 1.0% Tolerance Power Good Output With Internal Delay Enable Input Provides Micropower Shutdown Mode 5.0 V and 12 V Operation Adaptive Voltage Positioning Remote Sense Capability Current Sharing Capability VCC Monitor Hiccup Mode Short Circuit Protection Overvoltage Protection (OVP) Programmable Soft-Start 150 ns PWM Blanking 65 ns FET Nonoverlap Time 40 ns Gate Rise and Fall Times (3.3 nF Load) Pb-Free Packages are Available