ncp5381a ON Semiconductor, ncp5381a Datasheet

ncp5381a

Manufacturer Part Number

ncp5381a

Description

2/3/4 Phase Buck Controller For Vr10 And Vr11 Pentium Iv Processor Applications

Manufacturer

ON Semiconductor

Datasheet

1.NCP5381A.pdf (34 pages)

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NCP5381A

2/3/4 Phase Buck Controller

for VR10 and VR11 Pentium

IV Processor Applications

which combines differential voltage and current sensing, and

adaptive voltage positioning to power Intel’s most demanding

Pentium

supplies. Dual−edge pulse−width modulation (PWM) combined with

inductor current sensing reduces system cost by providing the fastest

initial response to transient loads thereby requiring less bulk and

ceramic output capacitors to satisfy transient load−line requirements.

allows easy compensation of the system. The proprietary method of

Dynamic Reference Injection (Patent Pending) makes the error

amplifier compensation virtually independent of the system response

to VID changes, eliminating the need for tradeoffs between load

transients and Dynamic VID performance.

Features

•

Applications

•

August, 2006 − Rev. 4

The NCP5381A is a two−, three−, or four−phase buck controller

A high performance operational error amplifier is provided, which

Meets Intel’s VR 10.0, 10.1, 10.2, and 11.0 Specifications

Dual−Edge PWM for Fastest Initial Response to Transient Loading

High Performance Operational Error Amplifier

Supports both VR11 and Legacy VR10 Soft−Start Modes

Dynamic Reference Injection (Patent Pending)

8−Bit DAC per Intel’s VR11 Specifications

DAC Range from 0.5 V to 1.6 V

"0.5% System Voltage Accuracy

Remote Temperature Sensing per VR11

2, 3, or 4−Phase Operation

True Differential Remote Voltage Sensing Amplifier

Phase−to−Phase Current Balancing

“Lossless” Differential Inductor Current Sensing

Differential Current Sense Amplifiers for each Phase

Adaptive Voltage Positioning (AVP)

Fixed No−Load Voltage Positioning at –19 mV

Frequency Range: 100 kHz–1.0 MHz

Latched Overvoltage Protection (OVP)

Threshold Sensitive Enable Pin for VTT Sensing

Power Good Output with Internal Delays

Programmable Soft−Start Time

Operates from 12 V

This is a Pb−Free Device*

Pentium IV Processors

VRM Modules

Graphics Cards

Low Voltage, High Current Power Supplies

IV Processors and low voltage, high current power

*Pin 41 is the thermal pad on the bottom of the device.

†For information on tape and reel specifications,

*For additional information on our Pb−Free strategy

NCP5381AMNR2G

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

and soldering details, please download the

ON Semiconductor

Techniques Reference Manual, SOLDERRM/D.

40 PIN QFN, 7x7

Device

CASE 488AG

MN SUFFIX

NCP5381A = Specific Device Code

ORDERING INFORMATION

http://onsemi.com

= Pb−Free Package

= Assembly Location

= Wafer Lot

= Year

= Work Week

(Pb−Free)

Package

QFN−40

Soldering

Publication Order Number:

2500 / Tape & Reel

AWLYYWWG

MARKING

DIAGRAM

NCP5381A

and

Shipping

NCP5381A/D

Mounting

†

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