Ultra-Low Power PMIC with 3-Output SIMO, 150mA LDO, and Power Sequencer

Always-On, Low-Power Application Mini PMIC. Single Inductor with 3 Buck-Boost Outputs, LDO, and Current Sinks

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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.

Design Solution: Choose a Tailored SIMO PMIC for Your Portable Design ›

MAX77640, MAX77641: Simplified Application Circuit MAX77640, MAX77641: Simplified Application Circuit Enlarge+

Key Features

  • 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


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

See parametric specs for Multifunction PMICs (82)

Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesInterface TypeVIN
Oper. Freq.
minmaxminmaxSee Notes
Reset Output
Serial Interface
Current Limit
Internal Switch
Single Inductor Multiple Output
Soft Start
Sync. Rectifier
$1.79 @1k
MAX77641 5.25

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.

MAX77640EVKIT: Evaluation Kit for the MAX77640/MAX77641
MAX77641EVKIT: Evaluation Kit for the MAX77640/MAX77641
Request Reliability Report for: MAX77640 
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.

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