Features and Benefits

  • Smart Power Path, Dual Input Switching Charger
    • Up to 13.4V Operating/16V Withstand/4A (CHGIN)
    • Up to 6V Operating/1.26A (WCIN)
    • Reverse Leakage Blocking
    • Reverse Boost with up to 5.1V/1.5A (OTG)
    • Integrated Low-Loss FETs for 3A Charging/4.5A Discharging
    • 95.6% Peak Efficiency at 5V/4.35V
    • Full Feature Charger with Protection
    • Thermal Regulation and JEITA Compliance
  • ModelGauge m5 Fuel Gauge
    • Time-to-Empty and Time-to-Full Prediction
    • Accurate Battery Capacity (SOC) and Time-to-Empty Readings
      • Temperature, Age, and Discharge Rate Compensated
      • No Calibration
      • Integrated FET Current Sensing
      • Maintains Accuracy without Empty, Full, or Idle States
    • Low Quiescent Current (IQ)
  • Two High Voltage Input LDOs
  • I2C Serial Interface
  • 72-Bump, 3.867mm x 3.608mm, 0.4mm Pitch WLP

Product Details

The MAX77818 integrates a high-performance 3A switching charger and proprietary ModelGauge™ m5 fuel gauge in a space saving WLP package, ideal for USB powered portable devices. The smart power path charger supports two inputs with reverse blocking and USB On-the-Go (OTG), integrates all power switches, operates at high-switching frequency with high efficiency, enabling low heat designs with small external components. The ModelGauge m5 algorithm combines the excellent short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge, along with temperature compensation to provide industry-leading fuel-gauge accuracy. The device also integrates two high voltage input LDOs and is highly programmable with I2C interface.


  • Bluetooth Headsets
  • Handheld Devices
  • Industrial PCs
  • Internet of Things (IoT)
  • Portable Medical Devices
  • Smart Home Automation, Sensors
  • Wearable, Smart Watches
  • Wireless Speakers

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.

Evaluation Kits (1)

Tools & Simulations

Reference Designs (1)

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.

PCN-PDN Information

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.


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.


Lead Times

Please see the latest communication from our CCO regarding lead times.



Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help


Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.