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廬

ISL6315

Data Sheet

February 10, 2006

FN9222.0

Two-Phase Multiphase Buck PWM

Controller with Integrated MOSFET

Drivers

The ISL6315 two-phase PWM control IC provides a

precision voltage regulation system for advanced loads up to

60A-80A. 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鈥檚 Hammer microprocessors, along with a system

regulation accuracy of

鹵1%.

The ISL6315, though, does not

intrinsically allow for load-line regulation (no droop).

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 ISL6315 uses cost and space-saving

r

DS(ON)

sensing for channel current balance 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 intelligent protection for modern power systems.

Features

鈥?Integrated Two-Phase Power Conversion

鈥?5V to 12V Input Voltage Conversion

鈥?Precision Channel Current Sharing

- Loss-Less Current Sampling - Uses r

DS(ON)

鈥?Precision Output Voltage Regulation

-

鹵1%

System Accuracy Over Temperature (Commercial)

鈥?Microprocessor Voltage Identification Inputs

- Up to a 6-Bit DAC

- Selectable between Intel鈥檚 VRM9, VRM10, or AMD鈥檚

Hammer DAC codes

鈥?Fast Transient Recovery Time

鈥?Overcurrent Protection

鈥?Pre-Biased Output Start-up Operation

鈥?Sources and Sinks Output Current

- Bus Termination Applications

鈥?Improved, Multi-tiered Overvoltage Protection

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 Plus Anneal Available (RoHS Compliant)

Pinout

ISL6315 (QFN)

TOP VIEW

UGATE1

19

18 PHASE1

17 LGATE1

25

GND

16 PVCC

15 LGATE2

14 PGND

13 PHASE2

7

ISEN

8

VCC

9

OFS

10

SSEND

11

BOOT2

12

UGATE2

BOOT1

20

Ordering Information

PART

NUMBER

ISL6315CR

ISL6315CRZ

(Note)

ISL6315IRZ

(Note)

ISL6315EVAL1

PART

MARKING

ISL6315CR

6315CRZ

6315IRZ

TEMP.

(擄C)

0 to 70

0 to 70

PACKAGE

PKG.

DWG. #

VID1

VID0

DACSEL/VID5

VRM10

COMP

FB

1

2

3

4

5

6

24

23

22

21

24 Ld 4x4 QFN L24.4x4B

24 Ld 4x4 QFN L24.4x4B

(Pb-free)

-40 to 85 24 Ld 4x4 QFN L24.4x4B

(Pb-free)

Evaluation Platform

*Add 鈥?T鈥?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.

**Contact Factory for Availability.

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. 2006. All Rights Reserved

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

ENLL

VID2

VID3

VID4

next

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