1. Products
  2. Power Management
  3. Switching Regulators
  4. SIMO Regulators
  5. MAX77640


Features and Benefits

  • Compact, High-Efficiency Power Solution
    • 3-Output Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator
    • 150mA LDO
    • 3-Channel Current-Sink Driver
    • Flexible Power Sequencing
    • GPIO and Reset Output
  • 3-Output SIMO Extends Battery Life
    • 2.7V to 5.5V Input Voltage Range from Single Cell Li-Ion
    • 0.8V to 5.25V Output Voltage Range (Table 1)
    • Supports >300mA loads (1.8VOUT, 3.7VIN)
    • Improves Overall System Efficiency while Reducing Size
    • Maintains Regulation without Dropout unlike Traditional Bucks
    • Glitchless Buck-Boost Operation
  • Low Quiescent Current
    • 300nA Shutdown Current
    • 5.6µA Operating Current (3 SIMO Channels and LDO On)
  • Small Size
    • 2.75mm x 2.15mm (0.7mm max heigh) WLP
    • 30-Bump, 0.4mm Pitch, 6 x 5 Array
    • 16mm2 Total Solution Size

Product Details

The MAX77640/MAX77641 are a low-IQ power solution for applications where size and efficiency are critical. The device integrates a 3-output single-inductor multiple-output (SIMO) buck-boost regulator, a 150mA LDO, and a 3-channel current-sink driver.

The SIMO operates on an input between 2.7V and 5.5V. The outputs are independently programmable between 0.8V and 5.25V depending on ordering option. Each output is a buck-boost with glitchless transition between buck and boost operation. The SIMO can support >300mA loads (1.8VOUT, 3.7VIN).

The 150mA LDO provides ripple rejection for noise-sensitive applications. The current sinks can be programmed to blink LEDs in custom patterns. The device integrates a power sequencer to control power-up/down order of each output. Default output voltages and sequence order are factory-programmable. An I2C serial interface further configures the device.

The MAX77640/MAX77641 are available in a 30-bump wafer-level package (WLP). Total solution size is 16mm2. For a similar product with a battery charger, refer to the MAX77650.


  • Action Cameras, Wearable/Body Cameras
  • Hearables: Bluetooth Headphones and Earbuds
  • Internet of Things (IoT) Devices
  • Wearables: Fitness, Health, and Activity 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 (2)

Tools & Simulations

Reference Designs (1)

Product Recommendations

MAX77640 Companion Parts

Recommended Related Parts

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
MAX77640AEWV+ Material Declaration Reliability Data Wafer-Level Package 5x6 Bump, Full Array
MAX77640AEWV+T Material Declaration Reliability Data Wafer-Level Package 5x6 Bump, Full Array
Wafer Fabrication Data

Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.