FN9126 Rev 8.00

Page 1 of 20

Jun 10, 2010

FN9126

Rev 8.00

Jun 10, 2010

ISL6563

Two-Phase Multiphase Buck PWM Controller with Integrated MOSFET Drivers

DATASHEET

The ISL6563 two-phase PWM control IC provides a

precision voltage regulation system for advanced

microprocessors. Multiphase power conversion is a marked

departure from single phase converter configurations

employed to satisfy the increasing current demands of

modern microprocessors and other electronic circuits. By

distributing the power and load current, implementation of

multiphase converters utilize smaller and lower cost

transistors with fewer input and output capacitors. These

reductions accrue from the higher effective conversion

frequency with higher frequency ripple current due to the

phase interleaving process of this topology.

Outstanding features of this controller IC include

programmable VID codes compatible with Intel VRM9,

VRM10, as well as AMD’s Hammer microprocessors, along

with a system regulation accuracy of

1%. The droop

characteristic, used to reduce the overshoot or undershoot of

the output voltage, is easily programmed with a single resistor.

Important features of this controller IC include a set of

sophisticated overvoltage and overcurrent protection.

Overvoltage results in the converter turning the lower

MOSFETs ON to clamp the rising output voltage and protect

the microprocessor. Like other Intersil multiphase

controllers, the ISL6563 uses cost and space-saving

voltage positioning, and overcurrent protection. Channel

current balancing is automatic and accurate with the

integrated current-balance control system. Overcurrent

protection can be tailored to any application with no need for

additional parts. These features provide advanced protection

for the microprocessor and power system.

Features

• Integrated Two-Phase Power Conversion

• Both 5V and 12V Conversion

• Precision Channel Current Sharing

• Precision Output Voltage Regulation

-

1% System Accuracy Over-Temperature (Commercial)

• Microprocessor Voltage Identification Inputs

- Up to a 6-Bit DAC

- Selectable between Intel’s VRM9, VRM10, or AMD’s

Hammer DAC codes

- Resistor-Programmable Droop Voltage

• Fast Transient Recovery Time

• Overcurrent Protection

• Improved, Multi-tiered Overvoltage Protection

• Capable of Start-up into a Pre-Charged Output

• 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 (RoHS Compliant)

Pinout

ISL6563

(24 LD QFN)

TOP VIEW

Ordering Information

PART NUMBER

(Note 2)

PART

MARKING

TEMP.

RANGE

(°C)

PACKAGE

(Pb-free)

PKG.

DWG. #

ISL6563CRZ

65 63CRZ 0 to +70 24 Ld 4x4 QFN L24.4x4B

ISL6563CRZ-T (Note 1) 65 63CRZ 0 to +70 24 Ld 4x4 QFN L24.4x4B

ISL6563CRZ-TK (Note 1) 65 63CRZ 0 to +70 24 Ld 4x4 QFN L24.4x4B

ISL6563IRZ

65 63IRZ -40 to +85 24 Ld 4x4 QFN L24.4x4B

ISL6563IRZ-T (Note 1)

65 63IRZ -40 to +85 24 Ld 4x4 QFN L24.4x4B

ISL6563EVAL1

Evaluation Platform

NOTES:

1. Please refer to TB347 for details on reel specifications.

2. These Intersil Pb-free plastic packaged products employ special Pb-free

material sets, molding compounds/die attach materials, and 100% matte

tin plate plus anneal (e3 termination finish, which is 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.

VID1

VRM10

VID0

DACSEL/VID5

COMP

FB

LGATE2

PGND

PHASE1

LGATE1

PVCC

PHASE2

1

2

3

4

5

6

18

17

16

15

14

13

24

23

22

21

20

19

789

10

11

12

25

GND