1. Products
  2. Power Management
  3. Switching Regulators
  4. SIMO Regulators
  5. MAX77646

Alternative Parts


Features and Benefits

  • 1.8V to 3.3V Input Range
  • Highly Integrated
    • 3x Output, Single Inductor Multiple Output (SIMO) Buck-Boost Regulators
    • Supports Wide Output Voltage Range from 0.5V to 5.1V for all SIMO Channels
    • 1x 150mA LDO
    • 100mA in LSW Mode
    • 2x GPIOs (MAX77647)
    • Watchdog Timer (MAX77647)
  • Ultra Low-Power SIMO
    • 1.3μA Operating Current (3x SIMO Channels)
    • 0.1μA Shutdown Current
    • 85% Efficiency in Buck-Only Mode (VIN = 2.4V, VOUT = 0.8V,10mA, IPK = 0.5A)
    • 86% Efficiency in Buck-Boost Mode (VIN = 2.4V, VOUT = 1.8V,10mA, IPK = 0.5A)
    • 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 (MAX77646)
    • I2C-Programmable Output Voltages (MAX77647)
  • Small Size
    • 5mm2 Wafer-Level Package (WLP)
    • 20-Bump, 0.5mm Pitch, 5 x 4 Array

Product Details

The MAX77646/MAX77647 provides power supply solutions for low-power applications where size and efficiency are critical. The IC 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 150mA 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.

The MAX77646/MAX77647 operates with battery voltages from 1.8V with coin-cell, dual silver oxide, dual alkaline, and LiSOCL2 primary batteries.

The MAX77646 (RSEL variant) 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.

The MAX77647 (I2C variant) 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.


  • GNSS Module
  • IoT Enabled Wireless Sensor Nodes
  • Home Safety and Security Monitors
  • Factory Safety and Security Monitors
  • Fitness, Health, and Activity Trackers

Comparable Parts Click to see all in Parametric Search

Vout Min (typ)
Number of Outputs
Vout Max (typ)
Vin (min)
Vin (max)
Buck-Boost, SIMO
Buck-Boost, SIMO
Buck-Boost, LDO

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)

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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
MAX77646ANP+ Material Declaration Reliability Data 20-WLCSP-N/A
MAX77646ANP+T Material Declaration Reliability Data 20-WLCSP-N/A
Wafer Fabrication Data

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Evaluation Boards

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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.