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NCP5331

ON Semiconductor
Part Number NCP5331
Manufacturer ON Semiconductor
Description Two-Phase PWM Controller
Published Apr 25, 2007
Detailed Description NCP5331 Two−Phase PWM Controller with Integrated Gate Drivers The NCP5331 is a second−generation, two−phase, buck contro...
Datasheet PDF File NCP5331 PDF File

NCP5331
NCP5331

Overview
NCP5331 Two−Phase PWM Controller with Integrated Gate Drivers The NCP5331 is a second−generation, two−phase, buck controller that incorporates advanced control functions to power 64−bit AMD Athlont 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 V2t has been combined with an internal PWM ramp and voltage feedback directly from VCORE to the internal PWM comparator.
These features and enhancements 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 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+.
www.
DataSheet4U.
com http://onsemi.
com LQFP−32 FT SUFFIX CASE 873A MARKING DIAGRAMS NCP5331 AWLYYWWx 32 1 Features • • • • • • • • • • • • • • • • Reduced SMT Package Size (7 mm × 7 mm) Enhanced V2 Control Method Four On−Board Gate Drivers Internal PWM Ramps Differential Remote Voltage Sense Fast Feedback Pin (VFFB) 5−Bit DAC with 0.
8% System Tolerance Timed Hiccup Mode Current Limit Power Good Output with Programmable Delay Advanced Overvoltage Protection (OVP) Adjustable Output Voltage Positioning 150 kHz to 600 kHz Operation Set by Resistor “Lossless” Current Sensing through Output Inductors Independent Current Sense Amplifiers 5.
0 V, 2 mA Reference Output Pb−Free Package is Available* A WL YY WW x = Assembly Location = Wafer Lot = Year = Work Week = G or G *...


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