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CS5165AONN/a249avai5-Bit Synchronous CPU Buck Controller


CS5165A ,5-Bit Synchronous CPU Buck ControllerELECTRICAL CHARACTERISTICS (continued) (0°C < T < +70°C; 0°C < T < +125°C; 8.0 V < V < 14 V; 2.8 D ..
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CS5165A
5-Bit Synchronous CPU Buck Controller
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The CS5165A synchronous 5–bit NFET buck controller is optimized
to manage the power of the next generation Pentium II processors. It’s2  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 start up, 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.
Features
•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 & 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
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