NCP5331_05 Datasheet, PDF (1/36 Pages) ON Semiconductor – Two-Phase PWM Controller with Integrated Gate Drivers

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 V_CORE 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+.
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 (V_FFB)
• 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*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
March, 2005 − Rev. 12
http://onsemi.com
LQFP−32
FT SUFFIX
CASE 873A
MARKING DIAGRAMS
NCP5331
AWLYYWWx
32
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
x = G or G
*Pb−Free indicator, “G” or microdot “ G”,
may or may not be present.
ORDERING INFORMATION
Device
Package
Shipping^†
NCP5331FTR2
NCP5331FTR2G
LQFP−32 2000 Tape & Reel
LQFP−32 2000 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Publication Order Number:
NCP5331/D