NCP5331 datasheet(1/38 Pages) ONSEMI

Part #	NCP5331

Description	Two-Phase PWM Controller with Integrated Gate Drivers

PDF	38 Pages

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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June, 2003 - Rev. 11

1

Publication Order Number:

NCP5331/D

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

Athlon

t 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 V2

t

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+.

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

http://onsemi.com

A

= Assembly Location

WL = Wafer Lot

YY = Year

WW = Work Week

MARKING

DIAGRAMS

LQFP-32

FT SUFFIX

CASE 873A

NCP5331

AWLYYWW

ORDERING INFORMATION

NCP5331FTR2

LQFP-32

2000 Tape & Reel

Device

Package

Shipping

32

1

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