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Ultra Configurable PMIC Featuring 93% Peak Efficiency Single-Inductor, 3-Output Buck-Boost, 1-LDO for Long Battery Life

3 x SIMO Outputs With a Peak Efficiency of 93%

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • 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 150mA LDO
      • 100mA in LSW mode
    • 2x GPIOs (MAX77643)
    • Watchdog Timer (MAX77643)
  • Ultra Low-Power SIMO​
    • 5μA Operating Current (3x SIMO Channels + 1x LDOs)
    • 1μA Operating Current per SIMO Channel
    • 0.3μA Shutdown Current
    • 93% Peak Efficiency in Boost-Only Mode
    • 91% Peak Efficiency in Buck-Only Mode
    • Less Than 20mVpp Output Ripple at VOUT = 1.8V
    • Automatic Low-Power Mode to Normal-Power Mode Transition
  • Flexible and Configurable
    • Ultra-Configurable Resistor Programmable Output Voltages (MAX77642)
    • I2C-Programmable Output Voltages (MAX77643)
  • Small Size
    • 4.24mm2 Wafer-Level Package (WLP)
    • 25-Bump, 0.4mm Pitch, 5 x 5 Array

Applications/Uses

  • Next Generation Hearables
  • Fitness, Health, and Activity Monitors
  • Safety and Security Monitors
  • Portable Consumer Devices

Description

The MAX77642/MAX77643 provide power supply solutions for low-power applications where size and efficiency are critical. The IC features a SIMO buck-boost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A 150mA LDO provides ripple rejection for audio and other noise-sensitive applications. The LDO can also be configured as load switches to manage power consumption by disconnecting external blocks when not required.

The MAX77642's SIMO and LDO output voltages are individually programmable through resistors. A peak current limit input is used to set both the inductor's peak current limits of the device with a single resistor. Individual enable pins combined with the flexible resistor programmability allows the device to be tailored for many applications.

This MAX77643's SIMO and LDO output voltages are individually programmable through I2C and in addition, includes two GPIOs with alternate modes for scalability. 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.

Simplified Block Diagram

MAX77642, MAX77643: Typical Application Circuit MAX77642, MAX77643: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .