1. Products
  2. Power Management
  3. Battery Management
  4. Battery Charger Plus DC/DC
  5. MAX77659


Features and Benefits

  • Highly Integrated
    • 3x Output, Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator
      • Supports Wide Output Voltage Range from 0.5V to 5.5V for all SIMO Channels
    • 1x 100mA LDO/LSW
    • Smart Power Selector™ Li+/Li-Poly Switching Charger
    • 2x GPIO Resources
    • Analog MUX Output for Power Monitoring
    • Factory-Ship Mode (< 200nA IQ)
    • Watchdog Timer
  • Low Power
    • 0.3μA Shutdown Current
    • 5μA Operating Current (3 SIMO Channels + 1 LDO)
  • Charger Optimized for Small Battery Size
    • Input Operating Voltage from 3.4V to 5.5V
    • Programmable Fast-Charge Current from 7.5mA to 300mA 
    • Programmable Battery Regulation Voltage from 3.6V to 4.6V
    • Programmable Termination Current from 0.375mA to 45mA
    • Thermal Regulation and JEITA Compliance
  • Flexible and Configurable
    • I2C-Compatible Interface and GPIO
    • Factory OTP Options Available
  • Small Size
    • 6.04mm2 Wafer-Level Package (WLP)
    • 30-Bump, 0.4mm Pitch, 6x5 Array

Product Details

The MAX77659 provides highly-efficient integrated battery charging and power supply solutions for low-power applications where size and efficiency are critical. The IC features a dual-input SIMO buck-boost regulator that provides one charging rail and three independently programmable power rails from a single inductor to minimize total solution size. A 100mA LDO provides ripple rejection for audio and other noise-sensitive applications. The LDO can also be configured as a load switch to manage power consumption by disconnecting external blocks when not required. A highly-configurable switching charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA).

This device includes two GPIOs and an analog multiplexer that switches several internal voltages and current signals to an external node for monitoring with an external ADC. A bidirectional I2C serial interface allows for configuring and checking the status of the devices. An internal on/off controller provides a controlled startup sequence for the regulators and provides supervisory functionality while they are on. Numerous factory programmable options allow the device to be tailored for many applications, enabling faster time to market.


  • TWS Earbuds
  • Bluetooth Headphones, Hearables
  • Smart Wearables, Fitness Bands, and Medical Wearables
  • Hearing Aids

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations

Software Development

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.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX77659AENV+ Material Declaration Reliability Data 30-WLCSP-N/A
MAX77659AENV+T Material Declaration Reliability Data 30-WLCSP-N/A
Wafer Fabrication Data

Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

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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.