ir3082pbf International Rectifier Corp., ir3082pbf Datasheet

ir3082pbf

Manufacturer Part Number

ir3082pbf

Description

Xphase Amd Opterontm/athlon 64tm Control Ic

Manufacturer

International Rectifier Corp.

Datasheet

1.IR3082PBF.pdf (33 pages)

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DESCRIPTION

FEATURES

APPLICATION CIRCUIT

ENABLE

VID0

VID1

VID2

VID3

VID4

12V

The IR3082PbF Control IC combined with an IR XPhase

way to implement a complete Opteron or Athlon64 power solution. The “Control” IC provides overall

system control and interfaces with any number of “Phase ICs” which each drive and monitor a single

phase of a multiphase converter. With simple 5 bit voltage programming and a few external components,

the IR3082PbF is also well suited for general purpose multiphase applications. The XPhase

results in a power supply that is smaller, less expensive, and easier to design while providing higher

efficiency than conventional approaches.

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Page 1 of 33

5 bit VID with 1% overall system set point accuracy

Programmable Dynamic VID Slew Rate

+/-300mV Differential Remote Sense

Programmable 150kHz to 1MHz oscillator

Programmable VID Offset and Load Line output impedance

Programmable Softstart

Programmable Hiccup Over-Current Protection with Delay to prevent false triggering

Simplified Power Good output provides indication of proper operation and avoids false triggering

Operates from 12V input with 9.75V Under-Voltage Lockout

7.0V/5mA Bias Regulator provides System Reference Voltage

Small thermally enhanced 20L MLPQ package

VID0

VID1

VID2

VID3

VID4

IR3082PbF

CONTROL IC

XPHASE

RVDAC

CVDAC

ROCSET

EAOUT

VBIAS

VDRP

0.1uF

VCC

RVDRP

0.1uF

AMD OPTERON

RVFB

Phase IC provides a full featured and flexible

/ATHLON 64

POWER GOOD

VCC SENSE

VSS SENSE

Data Sheet No.94710

IR3082PbF

5 Wire Analog Bus

(to PHASE ICs)

CONTROL IC

01/31/05

architecture

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