intersil ISL6596 DATA SHEET

®

www.BDTIC.com/Intersil

ISL6596

Data Sheet November 2, 2005

Synchronous Rectified MOSFET Driver

The ISL6596 is a high frequency, MOSFET driver optimized
to drive two N-Channel power MOSFETs in a synchronous
buck converter topology. This driver combined with Intersil’s
Multi-Phase Buck PWM controllers forms a complete single­stage core-voltage regulator solution with high efficiency
performance at high switching frequency for advanced
microprocessors.

The IC is biased by a single low voltage supply (5V),
minimizing driver switching losses in high MOSFET gate
capacitance and high switching frequency applications.
Each driver is capable of driving a 3nF load with less than
10ns rise/fall time. Bootstrapping of the upper gate driver is
implemented via an internal low forward drop diode,
reducing implementation cost, complexity, and allowing the
use of higher performance, cost effective N-Channel
MOSFETs. Adaptive shoot-through protection is integrated
to prevent both MOSFETs from conducting simultaneously.

The ISL6596 features 4A typical sink current for the lower
gate driver, enhancing the lower MOSFET gate hold-down
capability during PHASE node rising edge, preventing power
loss caused by the self turn-on of the lower MOSFET due to
the high dV/dt of the switching node.

The ISL6596 also features an input that recognizes a high­impedance state, working together with Intersil multi-phase

3.3V or 5V PWM controllers to prevent negative transients
on the controlled output voltage when operation is
suspended. This feature eliminates the need for the schottky
diode that may be utilized in a power system to protect the
load from negative output voltage damage.

Applications

• Core Voltage Supplies for Intel® and AMD®
Microprocessors

• High Frequency Low Profile High Efficiency DC/DC
Converters

• High Current Low Voltage DC/DC Converters

• Synchronous Rectification for Isolated Power Supplies

Related Literature

• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN (MLFP) Packages”

• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”

FN9240.0

Features

• Drives Two N-Channel MOSFETs

• Adaptive Shoot-Through Protection

•0.4Ω On-Resistance and 4A Sink Current Capability

• Supports High Switching Frequency

- Fast Output Rise and Fall Time

- Low Tri-State Hold-Off Time (20ns)

• Support 3.3V and 5V PWM Input

•Low Quiescent Supply Current

• Power-On Reset

• Expandable Bottom Copper Pad for Heat Spreading

• Dual Flat No-Lead (DFN) Package

- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat
No Leads-Product Outline

- Near Chip-Scale Package Footprint; Improves PCB
Efficiency and Thinner in Profile

• Pb-Free Plus Anneal Available (RoHS Compliant)

Ordering Information

PAR T

NUMBER

ISL6596CBZ
(Note)

ISL6596CBZ-T
(Note)

ISL6596CRZ
(Note)

ISL6596CRZ-T
(Note)

ISL6596IBZ
(Note)

ISL6596IBZ-T
(Note)

ISL6596IRZ
(Note)

ISL6596IRZ-T
(Note)

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.

PART

MARKING

6596CBZ 0 to 70 8 Ld SOIC M8.15

6596CBZ 8 Ld SOIC Tape and Reel

596Z 0 to 70 10 Ld 3x3 DFN L10.3x3

596Z 10 Ld DFN Tape and Reel

96IZ -40 to 85 10 Ld 3x3 DFN L10.3x3

96IZ 10 Ld DFN Tape and Reel

TEMP

RANGE

(°C) PACKAGE

-40 to 85 8 Ld SOIC M8.15

8 Ld SOIC Tape and Reel

PKG.

DWG. #

1

Intel® is a registered trademark of Intel Corporation. AMD® is a registered trademark of Advanced Micro Devices, Inc.

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. 2005. All Rights Reserved

Pinout

www.BDTIC.com/Intersil

ISL6596 (SOIC)

TOP VIEW

ISL6596

ISL6596 (DFN)

TOP VIEW

UGATE

BOOT

PWM

GND

Block Diagram

1

2

3

4

VCC

VCTRL

PWM

8

7

6

5

7k

PHASE

VCTRL

VCC

LGATE

7k

CONTROL

LOGIC

ISL6596

SHOOT-

THROUGH

PROTECTION

UGATE

VCC

BOOT

N/C

PWM

GND

1

2

3

4

5

BOOT

UGATE

PHASE

LGATE

GND

10

9

8

7

6

PHASE
VCTRL
N/C
VCC
LGATE

VCTRL = CONTROLLER VCC

2

FN9240.0

November 2, 2005

ISL6596

www.BDTIC.com/Intersil

Typical Application - Multi-Phase Converter Using ISL6596 Gate Drivers

V

IN

+5V

+3.3V

PGOOD

VID

(OPTIONAL)

+3.3V

FB

VCC

VSEN

PWM

CONTROLLER

(ISL69XX)

FS/EN

GND

R

ISL6596

ISL6596

BOOT

UGATE

PHASE

LGATE

V

BOOT

UGATE

PHASE

LGATE

COMP

PWM1

PWM2

ISEN1

ISEN2

IS REQUIRED FOR SPECIAL POWER SEQUENCING APPLICATIONS

UGPH

(SEE APPLICATION INFORMATION SECTION ON PAGE 8)

VCC

VCTRL

PWM

+5V

VCC

VCTRL

PWM

IN

R

R

UGPH

UGPH

+V

CORE

3

FN9240.0

November 2, 2005