Low IQ SIMO PMIC with 4-Outputs Delivering up to 700mA Total Output Current

20% Smaller and 15% Less in BOM Content

Please check latest availability status for a specific part variant.


The MAX77655 provides a highly-integrated power supply solution for low-power applications where size and efficiency are critical. Also, it features a single-inductor, multiple-output (SIMO) buck-boost regulator that provides four independently programmable power rails from a single inductor to minimize total solution size. The PMIC is capable of delivering a total of 700mA output current (3.7VIN, 1.8VOUT).

A bidirectional I2C 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 when the devices are on. Numerous factory programmable options allow the device to be tailored for many applications, enabling faster time to market.

MAX77655: Simplified Block Diagram MAX77655: Simplified Block Diagram Enlarge+

Key Features

  • Highly Integrated
    • 4x Output, Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator
      • Support Output Voltage Range from 0.5V to 4.0V for All SIMO Channels
      • 6.9μA Typical IQ with Two Outputs Enabled in Low-Power Mode
      • > 700mA Output Current at 3.7VIN and 1.8VOUT
      • Up to 90% Efficiency at 3.7VIN and 1.8VOUT
  • Flexible and Configurable
    • I2C Compatible Interface
    • Factory OTP Options Available
  • Small Size
    • 3.95mm2 Wafer-Level Package (WLP)
    • 16-Bump, 0.5mm-Pitch, 4 x 4 Array


  • TWS Bluetooth™ Headphones/Hearables
  • Fitness, Health, Activity Monitors, and Smart Watches
  • Portable Devices
  • Sensors Nodes and Consumer Internet of Things (IoT)

See parametric specs for Multifunction PMICs (83)

Part NumberVIN
Number of Step-Down OutputsNumber of Step-Up Outputs
MAX77655 NEW!2.55.544

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX77655EVKIT: Evaluation Kit for the MAX77655

Technical Documents

User Guide 7278 MAX77655 Programmer's Guide
Request Reliability Report for: MAX77655 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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Type ID Title
User Guide 7278 MAX77655 Programmer's Guide