The ISL6614A integrates two ISL6613A MOSFET drivers and

is specifically designed to drive two Channel MOSFETs in a

synchronous rectified buck converter topology. These drivers

combined with HIP63xx or ISL65xx Multi-Phase Buck PWM

controllers and N-Channel MOSFETs form complete core

voltage regulator solutions for advanced microprocessors.

The ISL6614A 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 ISL6614A 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.

特性 Features

? Pin-to-pin Compatible with HIP6602 SOIC Family

? Quad N-Channel MOSFET Drives for Two Synchronous

Rectified Bridges

? Advanced Adaptive Zero Shoot-Through Protection

- Body Diode Detection

- Auto-zero of rDS(ON) Conduction Offset Effect

? 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

? 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 Plus Anneal Available (RoHS Compliant)

Applications

? Core Regulators for Intel? and AMD? Microprocessors

? High Current DC/DC Converters

? High Frequency and High Efficiency VRM and VRD