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廬

ISL6565A, ISL6565B

Data Sheet

September 2004

FN9135.3

Multi-Phase PWM Controller with

Precision r

DS(ON)

or DCR Current Sensing

for VR10.X Application

The ISL6565A, ISL6565B controls microprocessor core

voltage regulation by driving up to 3 synchronous-rectified

buck channels in parallel. Multi-phase buck converter

architecture uses interleaved timing to multiply channel

ripple frequency and reduce input and output ripple currents.

The difference between the ISL6565A and the ISL6565B is

that the ISL6565A utilizes r

DS(ON)

current sensing, while the

ISL6565B utilizes DCR current sensing for each phase.

These cost and space saving methods of current sensing

are used for adaptive voltage positioning (droop), channel-

current balancing, and overcurrent protection. To ensure the

accuracy of droop, a programmable internal temperature

compensation function is implemented to compensate the

effect of r

DS(ON)

and DCR temperature sensitivity.

A unity gain, differential amplifier is provided for remote

voltage sensing. Any potential difference between remote

and local grounds is eliminated using the remote-sense

amplifier. The precision threshold-sensitive enable input is

available to accurately coordinate the start up of the

ISL6565A, ISL6565B with Intersil MOSFET driver ICs.

Dynamic-VID鈩?technology allows seamless on-the-fly VID

changes. The offset pin allows accurate voltage offset

settings that are independent of VID setting.

Features

鈥?Multi-Phase Power Conversion

- 2 or 3 Phase Operation

鈥?Precision Core Voltage Regulation

- Differential Remote Voltage Sensing

-

鹵0.5%

System Accuracy Over Temperature and Life

- Adjustable Reference-Voltage Offset

鈥?Precision r

DS(ON)

or DCR Current Sensing

- Integrated Programmable Temperature Compensation

- Accurate Load-Line Programming

- Accurate Channel-Current Balancing

- Low-Cost, Lossless Current Sensing

鈥?Input Voltage: 12V or 5V Bias

鈥?Microprocessor Voltage Identification Input

- Dynamic VID廬 Technology

- 6-Bit VID Input

- 0.8375V to 1.600V in 12.5mV Steps

鈥?Threshold Enable Function for Precision Sequencing

鈥?Overcurrent Protection

鈥?Overvoltage Protection

鈥?Digital Soft-Start

鈥?Operation Frequency up to 1.5MHz per Phase

鈥?QFN Package

- Compliant to JEDEC PUB95 MO-220

QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves

PCB efficiency and has a thinner profile

鈥?Pb-free Available

Ordering Information

PART NUMBER

ISL6565ACB

TEMP.

(擄C)

PACKAGE

PKG.

DWG. #

M28.3

M28.3

L28.5x5

0 to 105 28 Ld SOIC

ISL6565ACBZ (Note) 0 to 105 28 Ld SOIC (Pb-free)

ISL6565ACR

0 to 105 28 Ld 5x5 QFN

ISL6565ACRZ (Note) 0 to 105 28 Ld 5x5 QFN (Pb-free) L28.5x5

ISL6565ACV

0 to 105 28 Ld TSSOP

M28.173

M28.173

M28.3

M28.3

L28.5x5

ISL6565ACVZ (Note) 0 to 105 28 Ld TSSOP (Pb-free)

ISL6565BCB

0 to 105 28 Ld SOIC

ISL6565BCBZ (Note) 0 to 105 28 Ld SOIC (Pb-free)

ISL6565BCR

0 to 105 28 Ld 5x5 QFN

ISL6565BCRZ (Note) 0 to 105 28 Ld 5x5 QFN (Pb-free) L28.5x5

ISL6565BCV

0 to 105 28 Ld TSSOP

M28.173

M28.173

ISL6565BCVZ (Note) 0 to 105 28 Ld TSSOP (Pb-free)

NOTE: Intersil Pb-free products employ special Pb-free material

sets; molding compounds/die attach materials and 100% matte tin

plate termination finish, which is compatible with both SnPb and

Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J Std-020B.

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

|

Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright 漏 Intersil Americas Inc. 2003-2004. All Rights Reserved. Dynamic VID廬 is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

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