MAX77659

RECOMMENDED FOR NEW DESIGNS

SIMO PMIC with 300mA Switching Charger

Recharge Your TWS Earbuds 4 Times Faster and Reduce Your BOM by 60%

Data Sheet (Rev. 1)
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Overview

  • 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 Battery Regulation Voltage from 3.6V to 4.6V
    • (MAX77659A) Programmable Fast-Charge Current from 7.5mA to 300mA
    • (MAX77659S) Programmable Fast-Charge Current from 5.0mA to 200mA
    • (MAX77659A) Programmable Termination Current from 0.375mA to 45mA
    • (MAX77659S) Programmable Termination Current from 0.250mA to 30mA
    • 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

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.

Applications

  • TWS Earbuds
  • Bluetooth Headphones, Hearables
  • Smart Wearables, Fitness Bands, and Medical Wearables
  • Hearing Aids
MAX77659
SIMO PMIC with 300mA Switching Charger
MAX77659 Simplified Block Diagram MAX77659 WLP Pin Configuration
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Documentation

Data Sheet 1

Application Note 1

Technical Articles 2

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Software Resources

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Tools & Simulations

Software Development 1

Evaluation Kits

eval board
schematic 1
MAX77659EVKIT

Evaluation Kit for the MAX77659

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Features and Benefits

  • Easy to Use
  • GUI Drives I2C Interface
  • GPIO LEDs
  • Assembled and Fully Tested
  • On-Board Electronic Loads
    • Steady-State, Transient, and Random Modes
  • Evaluates Push-Button, Slide-Switch, and Logic Mode On-Key Options

Product Details

The MAX77659 evaluation kit (EV kit) allows for easy experimentation with various MAX77659 features, including a switching charger, a SIMO buck-boost regulator with three buck-boost outputs, a linear regulator, on/off controller, and I2C interface. Windows®-based software provides a user-friendly graphical interface as well as a detailed register-based interface to exercise the features of the MAX77659.

Applications

  • Bluetooth Headphones, Hearables
  • Hearing Aids
  • Smart Wearables, Fitness Bands, and Medical Wearables
  • TWS Earbuds
MAX77659EVKIT
Evaluation Kit for the MAX77659
MAX77659EVKIT: Board Photo

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