The ISL6594D is high frequency MOSFET driver specifically designed to drive upper and lower power N-Channel MOSFETs in a synchronous rectified buck converter topology. This driver combined with the ISL6594D Digital Multi-Phase Buck PWM controller and N-Channel MOSFETs forms a complete core-voltage regulator solution for advanced microprocessors. The ISL6594D drives both upper and lower gates over a range of 4. 5V to 13. 2V. 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. The ISL6594D includes 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. The ISL6594D also features an input that recognizes a high-impedance state, working together with Intersil multiphase 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.

Features

  • Dual MOSFET Drives for Synchronous Rectified Bridge
  • Pin-to-pin Compatible with ISL6596
  • Advanced Adaptive Zero Shoot-Through Protection
  • Body Diode Detection
  • Auto-zero of rDS(ON) Conduction Offset Effect
  • Adjustable Gate Voltage for Optimal Efficiency
  • 36V Internal Bootstrap Schottky Diode
  • Bootstrap Capacitor Overcharging Prevention
  • Supports High Switching Frequency (up to 2MHz)
  • 3A Sinking Current Capability
  • Fast Rise/Fall Times and Low Propagation Delays
  • Optimized for 3.3V PWM Input
  • 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
  • Dual Flat No-Lead (DFN) Package
  • Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile
  • Pb-Free (RoHS Compliant)

Applications

  • Optimized for POL DC/DC Converters for IBA Systems
  • Core Regulators for Intel® and AMD® Microprocessors
  • High Current DC/DC Converters
  • High Frequency and High Efficiency VRM and VRD

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active DFN Tube 100
Availability
Active DFN Reel 6000
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL6594D datasheet Datasheet PDF 629 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1116: CMOS Applications Information Application Note PDF 576 KB
PCNs & PDNs
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II Product Change Notice PDF 398 KB
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 248 KB
Other
TB363: Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) Other PDF 293 KB
TB458: Converting a Fixed PWM to an Adjustable PWM Other PDF 315 KB
TB389: PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages Other PDF 958 KB