ISL6568IR-T View Datasheet(PDF) - Intersil

Part Name

Description

View to exact match

ISL6568IR-T

Two-Phase Buck PWM Controller with Integrated MOSFET Drivers for VRM9, VRM10, and AMD Hammer Applications

Intersil 

®

Data Sheet

March 9, 2006

ISL6568

FN9187.4

Two-Phase Buck PWM Controller with

Integrated MOSFET Drivers for VRM9,

VRM10, and AMD Hammer Applications

The ISL6568 two-phase PWM control IC provides a

precision voltage regulation system for advanced

microprocessors. The integration of power MOSFET drivers

into the controller IC marks a departure from the separate

PWM controller and driver configuration of previous multi-

phase product families. By reducing the number of external

parts, this integration is optimized for a cost and space

saving power management solution.

Outstanding features of this controller IC include

programmable VID codes compatible with Intel

VRM9,VRM10, as well as AMD Hammer microprocessors. A

unity gain, differential amplifier is provided for remote voltage

sensing, compensating for any potential difference between

remote and local grounds. The output voltage can also be

positively or negatively offset through the use of a single

external resistor.

A unique feature of the ISL6568 is the combined use of both

DCR and rDS(ON) current sensing. Load line voltage

positioning (droop) and overcurrent protection are

accomplished through continuous inductor DCR current

sensing, while rDS(ON) current sensing is used for accurate

channel-current balance. Using both methods of current

sampling utilizes the best advantages of each technique.

Protection features of this controller IC include a set of

sophisticated overvoltage, undervoltage, and overcurrent

protection. Overvoltage results in the converter turning the

lower MOSFETs ON to clamp the rising output voltage and

protect the microprocessor. The overcurrent protection level

is set through a single external resistor. Furthermore, the

ISL6568 includes protection against an open circuit on the

remote sensing inputs. Combined, these features provide

advanced protection for the microprocessor and power

system.

Features

• Integrated Multi-Phase Power Conversion

- 1 or 2-Phase Operation

• Precision Core Voltage Regulation

- Differential Remote Voltage Sensing

- ±0.5% System Accuracy Over Temperature

- Adjustable Reference-Voltage Offset

• Precision Channel Current Sharing

- Uses Loss-Less rDS(ON) Current Sampling

• Accurate Load Line Programming

- Uses Loss-Less Inductor DCR Current Sampling

• Variable Gate Drive Bias: 5V to 12V

• Microprocessor Voltage Identification Inputs

- Up to a 6-Bit DAC

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

Hammer DAC codes

- Dynamic VID-on-the-fly Technology

• Overcurrent Protection

• Multi-tiered Overvoltage Protection

• Digital Soft-Start

• Selectable Operation Frequency up to 1.5MHz Per Phase

• Pb-Free Plus Anneal Available (RoHS Compliant)

Pinout

ISL6568 (QFN)

TOP VIEW

32 31 30 29 28 27 26 25

VID12.5 1

24 BOOT1

REF 2

23 PHASE1

OFS 3

22 VID4

VCC 4

COMP 5

33

GND

21 VID3

20 ENLL

FB 6

19 PHASE2

VDIFF 7

18 BOOT2

RGND 8

17 UGATE2

9 10 11 12 13 14 15 16

1

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

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

Copyright Intersil Americas Inc. 2004-2006. All Rights Reserved

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

Share Link: