intersil ISL6614 intersil

www.BDTIC.com/Intersil

ISL6614

Data Sheet May 5, 2008

Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features

The ISL6614 integrates two ISL6613 MOSFET drivers and is specifically designed to drive two independent power channels in a Multi-Phase interleaved buck converter topology. These drivers combined with HIP63xx or ISL65xx Multi-Phase Buck PWM controllers and N-Channel MOSFET s form complete core-voltage regulator solutions for advanced microprocessors.

The ISL6614 drives both the upper and lower gates simultaneously over a range from 5V to 12V. This drive voltage provides the flexibility necessary to optimize applications involving trade-offs between gate charge and conduction losses.

An advanced adaptive zero shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously and to minimize the dead time. These products add an overvoltage protection feature operational before VCC exceeds its turn-on threshold, at which the PHASE node is connected to the gate of the low side MOSFET (LGATE). The output voltage of the converter is then limited by the threshold of the low side MOSFET, which provides some protection to the microprocessor if the upper MOSFET(s) is shorted during startup. The overtemperature protection feature prevents failures resulting from excessive power dissipation by shutting off the outputs when its junction temperature exceeds +150°C (typically). The driver resets once its junction temperature returns to +108°C (typically).

The ISL6614 also features a three-state PWM input which, working together with Intersil’s multi-phase PWM controllers, prevents a negative transient on the output voltage when the output is shut down. This feature eliminates the Schottky diode that is used in some systems for protecting the load from reversed output voltage events.

FN9155.5

Features

• Pin-to-pin Compatible with HIP6602 SOIC Family for Better Performance and Extra Protection Features

• Quad N-Channel MOSFET Drives for Two Synchronous Rectified Bridges

• Advanced Adaptive Zero Shoot-Through Protection

- Body Diode Detection

- Auto-zero of r

• Adjustable Gate Voltage (5V to 12V) for Optimal Efficiency

• Internal Bootstrap Schottky Diode

• Bootstrap Capacitor Overcharging Prevention

• Supports High Switching Frequency (up to 1MHz)

- 3A Sinking Current Capability

- Fast Rise/Fall Times and Low Propagation Delays

• Three-State PWM Input for Output Stage Shutdown

• Three-State PWM Input Hysteresis for Applications With Power Sequencing Requirement

• Pre-POR Overvoltage +Protection

• VCC Undervoltage Protection

• Over-Temperature Protection (OTP) with +42°C Hysteresis

• Expandable Bottom Copper Pad for Enhanced Heat Sinking

• 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 Available (RoHS compliant)

Conduction Offset Effect

DS(ON)

Applications

• Core Regulators for Intel® and AMD® Microprocessors

• High Current DC/DC Converters

• High Frequency and High Efficiency VRM and VRD

Related Literature

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

• Technical Brief 400 and 417 for Power Train Design, Layout Guidelines, and Feedback Compensation Design

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.

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

ISL6614

www.BDTIC.com/Intersil

ISL6614CB, ISL6614CBZ, ISL6614IB

(14 LD SOIC)

TOP VIEW

PWM1

PWM2

GND

LGATE1

PVCC

PGND

LGATE2

VCC

PHASE1

UGATE1

BOOT1

BOOT2

UGATE2

PHASE2

ISL6614CR, ISL6614CRZ, ISL6614IR, ISL6614IRZ

(16 LD QFN)

TOP VIEW

PWM2

PWM1

VCC

PHASE1

16 14 13

GND

LGATE1

PVCC

PGND

GND

6578

LGATE2

UGATE1

BOOT1

BOOT2

UGATE2

PHASE2

Ordering Information

PART NUMBER PART MARKING TEMP. RANGE (°C) PACKAGE PKG. DWG. #

ISL6614CB* ISL6614CB 0 to +85 14 Ld SOIC M14.15 ISL6614CBZ* (Note) 6614CBZ 0 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6614CBZA* (Note) 6614CBZ 0 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6614CR* ISL 6614CR 0 to +85 16 Ld 4x4 QFN L16.4x4 ISL6614CRZ* (Note) 66 14CRZ 0 to +85 16 Ld 4x4 QFN (Pb-free) L16.4x4 ISL6614CRZA* (Note) 66 14CRZ 0 to +85 16 Ld 4x4 QFN (Pb-free) L16.4x4 ISL6614IB* ISL6614IB -40 to +85 14 Ld SOIC M14.15 ISL6614IBZ* (Note) 6614IBZ -40 to +85 14 Ld SOIC (Pb-free) M14.15 ISL6614IR* ISL 6614IR -40 to +85 16 Ld 4x4 QFN L16.4x4 ISL6614IRZ* (Note) 66 14IRZ -40 to +85 16 Ld 4x4 QFN (Pb-free) L16.4x4 *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.

NOTE: 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.

FN9155.5

May 5, 2008

Block Diagram

www.BDTIC.com/Intersil

ISL6614

VCC

PWM1

PWM2

GND

+5V

10k

PVCC

OTP AND

PRE-POR OVP

FEATURES

CONTROL

LOGIC

SHOOT-

THROUGH

PROTECTION

PGND

PVCC

SHOOT-

THROUGH

PROTECTION

PGND

PVCC

BOOT1

UGATE1

PHASE1

LGATE1

PGND

BOOT2

UGATE2

PHASE2

PVCC

LGATE2

CHANNEL 1

CHANNEL 2

PAD

FOR ISL6614CR, THE PAD ON THE BOTTOM SIDE OF THE QFN PACKAGE MUST BE SOLDERED TO THE CIRCUIT’S GROUND.

FN9155.5

May 5, 2008

ISL6614

www.BDTIC.com/Intersil

Typical Application - 4 Channel Converter Using ISL65xx and ISL6614 Gate Drivers

PGOOD

VID

VSEN

FS/DIS

COMP

MAIN

CONTROL

ISL65xx

GND

ISEN1

PWM1

PWM2

ISEN2

ISEN3 PWM3 PWM4

ISEN4

+5V

+12V

VCC

PWM1

PWM2

+12V

VCC

DUAL DRIVER ISL6614

BOOT1

UGATE1

PHASE1

LGATE1

PVCC

BOOT2

UGATE2

PHASE2

LGATE2

PGNDGND

BOOT1

UGATE1

PHASE1

5V TO 12V

+12V

CORE

LGATE1

DUAL DRIVER ISL6614

PWM1

PWM2

PVCC

5V TO 12V

BOOT2

UGATE2

PHASE2

LGATE2

PGNDGND

+12V

FN9155.5

May 5, 2008

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