IRU3027CW International Rectifier, IRU3027CW Datasheet

IRU3027CW

Manufacturer Part Number

IRU3027CW

Description

IC CTRL/REG SYNC BUCK 28-SOIC

Manufacturer

International Rectifier

Datasheet

1.IRU3027CW.pdf (10 pages)

Specifications of IRU3027CW

Applications

Controller, Intel Processor

Voltage - Input

5V, 12V

Number Of Outputs

Voltage - Output

1.08 ~ 1.85 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

28-SOIC (7.5mm Width)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Other names

*IRU3027CW
IRU3027-CW
IRU3027-CW

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

IRU3027CW

Manufacturer:

Quantity:

20 000

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FEATURES

APPLICATIONS

TYPICAL APPLICATION

PACKAGE ORDER INFORMATION

Rev. 1.5

07/17/02

5-BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC

Designed to meet VRM 9.0 specification for next

generation microprocessors

On-Board 5-Bit DAC programs the output voltage

from 1.075V to 1.850V in 25mV steps

Linear Regulator Controller On-Board for 1.8V

Provides single chip solution for Vcore, GTL+,

AGP bus, and 1.8V

Automatic Voltage Selection for AGP Slot V

Supply

Linear Regulator Controller On-Board for 1.5V

GTL+ Supply

Loss-less Short Circuit Protection for all Outputs

Synchronous operation allows maximum effi-

ciency

Patented architecture allows fixed frequency

operation as well as 100% duty cycle during

dynamic load

Minimum Part Count

Soft-Start

High current totem pole driver for direct driving of

the external power MOSFET

Power Good function monitors all outputs

Over-Voltage Protection Circuitry protects the

switcher output and generates a fault output

Total power solution for next generation Intel

processor application

AMD K7 Low Cost Solution

OUT

3.3V

0 To 70

(8C)

Figure 1 - Typical application of IRU3027.

IRU3027CW

CONTROL

IRU3027

CONTROL

LINEAR

DEVICE

DDQ

www.irf.com

WITH TRIPLE LDO CONTROLLER

SWITCHER

CONTROL

LINEAR

DESCRIPTION

The IRU3027 controller IC is specifically designed to meet

VRM 9.0 specification for next generation microproces-

sor applications requiring multiple on-board regulators.

The IRU3027 provides a single chip controller IC for the

Vcore, three LDO controllers, one with an automatic se-

lect pin that connects to the Type Detect pin of the AGP

slot for the AGP V

for the 1.8V chip set regulator as required for the next

generation PC applications. The IRU3027 is designed to

use either bipolar transistors for V

for any of the regulators. The switching regulator fea-

tures a patented topology that in combination with a few

external components as shown in the typical applica-

tion circuit, will provide well in excess of 20A of output

current for an on-board DC-DC converter while automati-

cally providing the right output voltage via the 5-bit inter-

nal DAC. The IRU3027 also features loss-less current

sensing for both switchers by using the R

high side power MOSFET as the sensing resistor, an

output under-voltage shutdown that detects short circuit

condition for the linear outputs and latches the system

off, and a Power Good window comparator that switches

its open collector output low when any one of the out-

puts is outside of a pre-programmed window.

OUT

4(1.8V). No external resistor divider is necessary

28-Pin Plastic SOIC WB

PACKAGE

DDQ

supply, one for GTL+ and the other

Data Sheet No. PD94146

OUT

IRU3027

OUT

3(1.5V) and

DS(ON)

of the

Related parts for IRU3027CW

IRU3027CW Summary of contents

Page 1

... LINEAR CONTROL SWITCHER CONTROL IRU3027 LINEAR LINEAR CONTROL CONTROL Figure 1 - Typical application of IRU3027. DEVICE PACKAGE IRU3027CW 28-Pin Plastic SOIC WB www.irf.com Data Sheet No. PD94146 IRU3027 supply, one for GTL+ and the other DDQ 3(1.5V) and OUT of the DS(ON ...

Page 2

IRU3027 ABSOLUTE MAXIMUM RATINGS V5 Supply Voltage .................................................... 7V V12 Supply Voltage .................................................. 20V Storage Temperature Range ...................................... -65 To 150°C Operating Junction Temperature Range ..................... PACKAGE INFORMATION 28 PIN WIDE BODY PLASTIC SOIC (W) TOP VIEW Drive2 1 28 ...

Page 3

PARAMETER SYM Error Comparator Section Input Bias Current Input Offset Voltage Delay to Outout Current Limit Section CS Threshold Set Current CS Comp Offset Voltage Hiccup Duty Cycle Output Drivers Section Rise Time Fall Time Dead Band Time Between High ...

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IRU3027CW International Rectifier, IRU3027CW Datasheet

IRU3027CW

Specifications of IRU3027CW

Available stocks

Related parts for IRU3027CW

IRU3027CW Summary of contents

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