The ISL6620, ISL6620A is a high frequency MOSFET driver designed to drive upper and lower power N-Channel MOSFETs in a synchronous rectified buck converter topology. The advanced PWM protocol of ISL6620, ISL6620A is specifically designed to work with Intersil VR11. 1 controllers and combined with N-Channel MOSFETs, form a complete core-voltage regulator solution for advanced microprocessors. When ISL6620, ISL6620A detects a PSI protocol sent by an Intersil VR11. 1 controller, it activates Diode Emulation (DE) operation; otherwise, it operates in normal Continuous Conduction Mode (CCM) PWM mode. The IC is biased by a single low voltage supply (5V), minimizing driving 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. To further enhance light load efficiency, ISL6620, ISL6620A enables diode emulation operation during PSI mode. This allows Discontinuous Conduction Mode (DCM) by detecting when the inductor current reaches zero and subsequently turning off the low side MOSFET to prevent it from sinking current. An advanced adaptive shoot-through protection is integrated to prevent both the upper and lower MOSFETs from conducting simultaneously and to minimize dead time. The ISL6620, ISL6620A has a 20kΩ integrated high-side gate-to-source resistor to prevent self turn-on due to high input bus dV/dt.

Features

  • Dual MOSFET Drives for Synchronous Rectified Bridge
  • Advanced Adaptive Zero Shoot-Through Protection
  • 36V Internal Bootstrap Schottky Diode
  • Advanced PWM Protocol (Patent Pending) to Support PSI Mode, Diode Emulation, Three-State Operation
  • Diode Emulation For Enhanced Light Load Efficiency
  • Bootstrap Capacitor Overcharging Prevention
  • Supports High Switching Frequency
  • 4A Sinking Current Capability
  • Fast Rise/Fall Times and Low Propagation Delays
  • VCC Undervoltage Protection
  • Enable Input and Power-On Reset
  • Expandable Bottom Copper Pad for Enhanced Heat Sinking
  • DFN Package:
  • Compliant to JEDEC PUB95 MO-220 DFN
  • Dual Flat No Leads
  • Package Outline
  • Near Chip Scale Package Footprint, which Improves PCB Efficiency and has a Thinner Profile
  • Pb-Free (RoHS Compliant)

Applications

  • High Light Load Efficiency Voltage Regulators
  • Core Regulators for Advanced 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
Active DFN Tube 100
Availability
Active DFN Reel 6000
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL6620, ISL6620A Datasheet Datasheet PDF 591 KB
User Guides & Manuals
ISL6334EVAL1Z User Guide Manual PDF 2.35 MB
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
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida Product Change Notice PDF 294 KB
PCN12068 - SOIC w/ Copper Bond Wire @ ASECL as Alternate Assembly Site Product Change Notice PDF 108 KB
Other
PLC18018 - General Q3 Product Life Cycle Notice Product Life Cycle Notice PDF 388 KB
PA16061 - Introduce New T-type End Plug for n-SOIC rail (packing tube) Product Advisory PDF 106 KB