Pentium II

Key Features

• Meets or exceeds all Intel 233/266MHz

Pentium II

• 12.7A continuous output

• 1.8 to 3.5V digitally selectable output

• 30A/µS transient load response capability

• Short circuit protected

• Surface Mount MOSFETs eliminate heatsinks

• >80% Efficiency

• Design kit available: IRVRM2

Purpose

This is a production-ready design. It has been thoroughly

tested for performance against the Intel Pentium II

266MHz power specification, and evaluated for

manufacturability by a high volume manufacturer.

This design will not be manufactured by International

Rectifier. Its purpose is to simplify the design and

qualification process for our customers.

Web Site

This design may be downloaded in two formats at IR’s

web site (www.irf.com). One is PDF format for on screen

viewing or printing, the other is in native format so that you

many manufacture the design if desired.

Floppy Disk

The design is also available on floppy disk. As on our web

site, the floppy version contains two formats, PDF and

native format.

Demo Boards

Completed boards are available through your local IR sales

office and distribution.

Support

E-mail Chris Davis at cdavis1@irf.com for support of this

design.

IRVRM2

The new IRVRM2 offers the power supply designer a

complete turnkey solution for DC/DC converters

required to power Intel’s new Pentium II

1

microprocessor. A synchronous buck regulator

topology operating at 200kHz is employed and achieves

excellent efficiency with very fast transient load response

and tight output voltage regulation.

The new 20V low V

board temperature and assembly costs while improving

circuit efficiency through reduced R

performance characterization along with a detailed

schematic, bill-of-materials, and PCB layout are offered

to reduce the customer’s design time and effort.

PD-6.088

Contents

Specifications ------------------------------------- 2

Schematic Diagram ------------------------------- 3

Bill of Materials ----------------------------------- 4

Inductor Specifications --------------------------- 5

Assembly Options -------------------------------- 5

Static Performance ------------------------------- 6

Dynamic Performance ---------------------------- 6

© International Rectifier, 1997

Fig 1. IRVRM2

Copyright Restriction

This design may be used for production or evaluation

purposes under the condition that all IR labeling and

identification marks remain on all boards produced using

this design, or as otherwise agreed to in writing by

International Rectifier.