7

FN9107.3

June 30, 2005

Typical Application - 2-Phase Converter

Figure 1 shows a 2-Phase Synchronous Buck Converter

circuit used to provide “CORE” voltage regulation for the

Intel Pentium IV mobile processor using IMVP-IV™ and

IMVP-IV+™ voltage positioning.

The ISL6217A PWM controller can be configured for two or

one channel operation, and the ISL6217A can change the

number of power channels in operation, dynamically. The

number of channels of operation can be changed through

the PWRCH pin. The ISL6217A can be configured for two

channel operation in “Active” mode and one channel

operation in “Deep” and “Deeper Sleep” modes through logic

connections to the PWRCH pin. The following configuration

uses two channel operation in “Active” mode and one

channel operation in “Deep” and “Deeper Sleep” modes.

The circuit shows pin connections for the ISL6217A PWM

controller in the 38 lead TSSOP package.

FIGURE 1. TYPICAL APPLICATION CIRCUIT FOR ISL6217A MULTIPHASE PWM CONTROLLER

VDD

DACOUT

DSV

FSET

PWRCH

EN

DRSEN

DSEN#

VID0

VID1

VID2

VID3

VID4

VID5

PGOOD

EA+

COMP

FB

SOFT

VBAT

ISEN1

PHASE1

UG1

BOOT1

VSSP1

LG1

VDDP

LG2

VSSP2

BOOT2

UG2

PHASE2

ISEN2

VSEN

DRSV

STV

OCSET

VSS

ISL6217A

TSSOP

VR_ON

DPRSLPVR

STP_CPU#

VID

PWRGD

Vbattery

+5VDC

+5VDC

+Vcc_core

ISL6217A