FN9135 Rev 4.00

Page 1 of 28

Dec 1, 2005

FN9135

Rev 4.00

Dec 1, 2005

ISL6565A, ISL6565B

Multi-Phase PWM Controller with Precision rDS(ON) or DCR Current Sensing for

VR10.X Application

DATASHEET

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

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

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™ technology allows seamless on-the-fly VID

changes. The offset pin allows accurate voltage offset

settings that are independent of VID setting.

Features

• Multi-Phase Power Conversion

- 2 or 3 Phase Operation

• Precision Core Voltage Regulation

- Differential Remote Voltage Sensing

-

0.5% System Accuracy Over Temperature and Life

- Adjustable Reference-Voltage Offset

- Integrated Programmable Temperature Compensation

- Accurate Load-Line Programming

- Accurate Channel-Current Balancing

- Low-Cost, Lossless Current Sensing

• Input Voltage: 12V or 5V Bias

• Microprocessor Voltage Identification Input

- Dynamic VID® Technology

- 6-Bit VID Input

- 0.8375V to 1.600V in 12.5mV Steps

• Threshold Enable Function for Precision Sequencing

• Overcurrent Protection

• Overvoltage Protection

• Digital Soft-Start

• Operation Frequency up to 1.5MHz per Phase

• 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

• Pb-Free Plus Anneal Available (RoHS Compliant)

Ordering Information

PART NUMBER

PART MARKING

TEMP. RANGE (°C)

PACKAGE

PKG. DWG. #

ISL6565ACB

ISL6565ACB

0 to 105

28 Ld SOIC

M28.3

ISL6565ACBZ (Note)

ISL6565ACBZ

0 to 105

28 Ld SOIC (Pb-free)

M28.3

ISL6565ACR

ISL6565ACR

0 to 105

28 Ld 5x5 QFN

L28.5x5

ISL6565ACRZ (Note)

ISL6565ACRZ

0 to 105

28 Ld 5x5 QFN (Pb-free)

L28.5x5

ISL6565ACV

ISL6565ACV

0 to 105

28 Ld TSSOP

M28.173

ISL6565ACVZ (Note)

ISL6565ACVZ

0 to 105

28 Ld TSSOP (Pb-free)

M28.173

ISL6565BCB

ISL6565BCB

0 to 105

28 Ld SOIC

M28.3

ISL6565BCBZ (Note)

ISL6565BCBZ

0 to 105

28 Ld SOIC (Pb-free)

M28.3

ISL6565BCR

ISL6565BCR

0 to 105

28 Ld 5x5 QFN

L28.5x5

ISL6565BCRZ (Note)

ISL6565BCRZ

0 to 105

28 Ld 5x5 QFN (Pb-free)

L28.5x5

ISL6565BCV

ISL6565BCV

0 to 105

28 Ld TSSOP

M28.173

ISL6565BCVZ (Note)

ISL6565BCVZ

0 to 105

28 Ld TSSOP (Pb-free)

M28.173

*Add "-T" suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are RoHS compliant and 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-020.

NOT RECOMMENDED FOR NEW DESIGNS

NO RECOMMENDED REPLACEMENT

contact our Technical Support Center at

1-888-INTERSIL or www.intersil.com/tsc