Digital Synchronous Rectifier Replaces Schottky Diode for Ultra-High Power Density AC/DC Power Adapters, Including RapidCharge™

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Optimized for Lowest BOM Cost in Applications up to 12V and Direct Charging Down to 3V

The iW676 digital synchronous rectifier can be used with several of Dialog's primary-side controllers to deliver to deliver the high efficiency needed for high power density, low BOM cost adapters for smartphones and media tablets, including RapidCharge™ and direct charge applications.

The iW676 uses proprietary digital adaptive turn-off control technology to replace the secondary-side parallel Schottky diodes with a MOSFET for high power density and lower cost.  More efficient than the diodes it replaces, the iW676 is also more efficient than conventional synchronous rectifiers.

The iW676 is optimized for lowest BOM cost in applications up to 12V and direct charging down to 3V. It also offers an option that incorporates Dialog’s unique Active Voltage Positioning (AVP) control to enable ultra-fast dynamic load response (DLR) and no-load power consumption of the entire travel adapter as low as 20mW, with no added pins or external components needed.

A DiaSIM simulation model is available for the iW676. For more information and where to download, please visit the DiaSIM page.


  • 25V Output
  • Optimized for Lowest BOM Cost in Applications up to 12V
  • Optimized for Direct Charging Applications Down to 3V
  • Wide VIN Pin Operating Voltage Up to 25V
  • Active Voltage Positioning (AVP) Control Option for:
    • Low No-Load Power Consumption of the Travel Adapter, as Low as 20mW
    • Ultra-Fast Dynamic Load Response (DLR)
    • No Additional Pins or External Components Needed



  • Compact AC/DC Adapters/Chargers for Smartphones and Tablets, including RapidCharge™ and Direct Charge

Model Available!

Small, SOT23 6-Pin Package

Block Diagrams

iW1797/iW657P Typical Applications Diagram
iW676 Functional Block Diagram

iW1799/iW657P Typical Applications Diagram


Product Briefs and Summaries
Date Version
iW676 Product Summary 04/10/2019 Rev. 1.4

For technical support or information on how to buy, contact us directly.

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Dialog’s DiaSIM simulation models and tools enable simulation and validation of AC/DC power supplies using highly accurate models for selected products. All models and application circuits are available for download from the support website.


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