The ISL6617 utilizes Intersil's proprietary Phase Doubler scheme to modulate two-phase power trains with single PWM input. It doubles the number of phases that Intersil's multi-phase controllers ISL63xx can support. When the enable pin (EN_PH_SYNC) is pulled low, the PWM input is pulled high. This simplifies the phase shedding implementation for some Intersil controllers (VR10, VR11, VR11. 1, and VR12 family) that can disable the respective and higher phase(s) by pulling the respective PWM line high. The ISL6617 is designed to minimize the number of analog signals that interface between the controller and drivers in high phase count scalable applications. The common COMP signal, which is usually seen in conventional cascaded configuration, is not required; this improves noise immunity and simplifies the layout. Furthermore, the ISL6617 provides low part count and low cost advantage over the conventional cascaded technique. By cascading the ISL6617 with another ISL6617 or ISL6611A, it can quadruple the number of phases that Intersil's multi-phase controllers ISL63xx can support. The ISL6617 also features Tri-State input and outputs that recognize a high-impedance state, working together with Intersil multiphase PWM controllers and driver stages 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 excessive negative output voltage damage.


  • Proprietary Phase Doubler scheme with Phase Shedding Function (Patent Pending)
  • Enhanced Light to Full Load Efficiency
  • Double or Quadruple Phase Count
  • Patented Current Balancing with DCR Current Sensing and Adjustable Gain
  • Current Monitoring Output (IOUT) to Simplify System Interface and Layout
  • Triple-Level Enable Input for Mode Selection
  • Dual PWM Output Drives for Two Synchronous Rectified Bridges with Single PWM Input
  • Channel Synchronization and Two Interleaving Options
  • Tri-State PWM Input and Outputs for Output Stage Shutdown
  • Phase Enable Input and PWM Forced High Output to Interface with Intersil's Controller for Phase Shedding
  • Overvoltage Protection
  • Dual Flat No-Lead (DFN) Package
    • Near Chip-Scale Package Footprint; Improves PCB Utilization, Thinner Profile
    • Pb-Free (RoHS Compliant)


  • High Current Low Voltage DC/DC Converters
  • High Frequency and High Efficiency VRM and VRD
  • High Phase Count and Phase Shedding Applications
  • 5V PWM Input Integrated Power Stage or DrMOS

Product Options

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

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL6617 Datasheet Datasheet PDF 884 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1116: CMOS Applications Information Application Note PDF 576 KB
PCN21005 - Alternate assembly facility of the listed Renesas DFN / QFN / TDFN / TQFN packaged products Product Change Notice PDF 158 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
TB363: Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) Other PDF 293 KB