Features and Benefits

  • Power Line Communication (PLC) Interface
    • 100kpbs System Throughput
    • 166.7kbps Bit Rate
    • 200mA per Output Charging Current
    • Automatic Earbud Insertion/Removal Detection
    • 4Mbaud, Half-Duplex, Data-Only UART Mode
    • PLC Controllable GPIOs, Reset and Shipping Mode
  • High-Efficiency Autonomous Charging System
    • 90% End-to-End Charging Efficiency from Master to Slave Battery
    • 200mA per Output Charging/System Current
    • Integrated 3.3W Buck-Boost
    • Automatic DVS for each Earbud to Optimize Charging Efficiency
  • Robust PLC Output Protection Features
    • Highly Flexible Moisture Detection Block
    • Programmable Overcurrent Protection
    • 8kV Contact ESD Protection
  • Small Solution Size
    • Small Single 1608 Inductor
    • 3.08mm x 2.83mm, 42-Bump Wafer-Level Package (WLP)

Product Details

The MAX20355 is a Power Line Communication (PLC) master with ModelGaugeTM m5 EZ fuel gauge and buckboost converter. The MAX20355 and MAX20357 provide a complete system solution for charging and data transfer between a charging case and a battery-powered device over a single contact.

The PLC interface is capable of 100kpbs throughput while simultaneously providing 400mA of total charging/system current. A 4Mbaud half-duplex dataonly UART mode provides an easy and fast method for firmware updates, debugging interface, and factory modes.

MAX20355 utilizes a 3.3W buck-boost converter with dynamic voltage scaling (DVS) to automatically manage the charging voltage based on the slave device MAX20357 control signal.

Additional features include comprehensive slave device insertion and removal notifications, moisture detection, overcurrent protection, and 8kV contact rated ESD protection on the PLC outputs.


  • TWS Headphones
  • Augmented Reality Glasses
  • Wearable Devices

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.



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