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

Description

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The MAX77640/MAX77641 are a low-I_Q 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 (1.8V_OUT, 3.7V_IN).

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.

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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 (1.8V_OUT, 3.7V_IN)
  • 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

Applications/Uses

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