1

®

FN9224.0

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

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Dynamic VID™ is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2006. All Rights Reserved

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ISL6307

Data Sheet

March 9, 2006

6-Phase PWM Controller with 8 Bit VID

DCR Differential Current

The ISL6307 controls microprocessor core voltage regulation

by driving up to 6 synchronous-rectified buck channels in

parallel. Multiphase buck converter architecture uses

interleaved timing to multiply channel ripple frequency and

reduce input and output ripple currents. Lower ripple results in

fewer components, lower component cost, reduced power

dissipation, and smaller implementation area.

Microprocessor loads can generate load transients with

extremely fast edge rates. The ISL6307 features a high

bandwidth control loop and ripple frequencies up to 6MHz to

provide optimal response to the transients.

Today’s microprocessors require a tightly regulated output

voltage position versus load current (droop). The ISL6307

senses current by utilizing patented techniques to measure

MOSFETs or DCR, of the output inductor during the lower

MOSFET conduction intervals. Current sensing provides the

needed signals for precision droop, channel-current

balancing, and overcurrent protection. A programmable

internal temperature compensation function is implemented

to effectively compensate for the temperature coefficient of

the current sense element.

A unity gain, differential amplifier is provided for remote

voltage sensing. Any potential difference between remote

and local grounds can be completely eliminated using the

remote-sense amplifier. Eliminating ground differences

improves regulation and protection accuracy. The threshold-

sensitive enable input is available to accurately coordinate

the start up of the ISL6307 with any other voltage rail.

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

• Precision Multiphase Core Voltage Regulation

- Differential Remote Voltage Sensing

-

±0.5% System Accuracy Over Life, Load, Line and

Temperature

- Adjustable Precision Reference-Voltage Offset

- Accurate Load-Line Programming

- Accurate Channel-Current Balancing

- Differential Current Sense

• Microprocessor Voltage Identification Input

- Dynamic VID™ Technology

- 8-Bit VID Input with Selectable VR11 Code and

Extended VR10 Code at 6.25mV Step

- 0.5V to 1.600V operation range

• Threshold-Sensitive Enable Function for Power

Sequencing and VTT Enable

• Thermal Monitoring

• Programmable Temperature Compensation

• Overcurrent Protection

• Overvoltage Protection with OVP Output Indication

• 2, 3, 4, 5 or 6 Phase Operation

• Adjustable Switching Frequency up to 1MHz per Phase

• QFN Package Option

- QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad

Flat No Leads - Product Outline

- QFN Near Chip Scale Package Footprint; Improves

PCB Efficiency, Thinner in Profile

• Pb-Free Plus Anneal Available (RoHS Compliant)

Ordering Information

PART NUMBER

TEMP. (°C)

PACKAGE

PKG. DWG.

#

ISL6307CRZ

(See Note)

0 to 70

48 Ld 7x7 QFN

(Pb-free)

L48.7x7

ISL6307IRZ

(See Note)

-40 to 85

48 Ld 7x7 QFN

(Pb-free)

L48.7x7

*Add “-T” suffix to part number for tape and reel packaging.

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.