1. Products
  2. Power Management
  3. Battery Management
  4. Battery Charger Plus DC/DC
  5. MAX77278


Features and Benefits

  • Highly Integrated
    • Smart Power Selector™ Li+/Li-Poly Charger
    • Three Output, SIMO Buck-Boost Regulator
    • 50mA LDO with SIMO Fixed Headroom Control
    • Programmable 250mA to 425mA Current Sink Driver
    • Analog MUX Output for Power Monitoring
    • Eight GPIOs (Configured for One-Button Wake-Up and Two-Button Shutdown)
  • Low Power
    • 0.3µA Standby Current
    • 16µA Operating Current
  • Charger Optimized for Small Battery Size
    • 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
    • JEITA Battery Temperature Monitors Adjust Charge Current and Battery Regulation Voltage for Safe Charging
  • Flexible and Configurable
    • I2C-Compatible Interface
    • Eight GPIOs
    • Factory OTP Options Available
  • Small Size
    • 3.15mm x 2.15mm x 0.7mm
    • 35-Bump, 0.4mm-Pitch, 7x5 Ball Array, WLP
    • Small Total Solution Size (24mm2)

Product Details

The MAX77278 provides a highly-integrated battery charging and power supply solution for low-power applications where size and efficiency are critical.The device features a single-inductor multiple-output (SIMO) buck-boost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A 50mA LDO provides ripple rejection for audio and other noise-sensitive applications. A highly-configurable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA).

The device includes other features such as a programmable current sink that can be used to drive an IR-LED, 8 general-purpose input/output (GPIO) control pins, and an analog multiplex (AMUX) output that provides access to useful battery charging signals. A bidirectional I2C interface allows for configuring and checking the status of the device. An internal on/off controller provides a controlled startup sequence for the regulators and provides supervisory functionality when the device is on. Numerous factory programmable options allow the device to be tailored for many applications, enabling faster time to market.

Design Solution: Choose a Tailored SIMO PMIC for Your Portable Design ›


  • Internet of Things (IoT) Gadgets
  • Remote Controls, Game Pads, Media Center Controllers
  • Smart Home Automation Pads, Thermostats, Battery-Powered User Interfaces
  • Wearables, Fitness and Health Monitors

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

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
MAX77278EWB+ Material Declaration Reliability Data Wafer-Level Package 5x7 Bump, Full Array
MAX77278EWB+T Material Declaration Reliability Data Wafer-Level Package 5x7 Bump, Full Array
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.