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3-Output SIMO Buck-Boost Regulator with Power Sequencer and 3μA IQ

Always-On, Low power application mini PMIC. Single inductor with 3 buck-boost outputs

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 2.7
VIN (V) (max) 5.5
# Step-Down Outputs 3
# Step-Up Outputs 3
VOUT (V) (min) 2.4
VOUT (V) (max) 5.25
Package/Pins WLP/30
Budgetary
Price (See Notes)
1.71
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 2.7
VIN (V) (max) 5.5
# Step-Down Outputs 3
# Step-Up Outputs 3
VOUT (V) (min) 2.4
VOUT (V) (max) 5.25
Package/Pins WLP/30
Budgetary
Price (See Notes)
1.71

Key Features

  • Single-Inductor, Multiple-Output (SIMO) Extends Battery Life
    • 300nA Shutdown Current
    • 3.0µA Operating Quiescent Current (3 SIMO Channels On)
    • Improves Overall System Efficiency while Reducing Size
    • Maintains Regulation without Dropout unlike Traditional Bucks
    • Glitchless Buck-Boost Operation
  • Compact, High-Efficiency Power Solution
    • Three Independent Channels from SIMO Regulator
    • 2.7V to 5.5V Input Voltage Range from Single Cell Li-Ion
    • 0.8V to 5.25V Output Voltage Range (Table 1)
    • Flexible Power Sequencing
    • On-Key Input for Hardware Enable
    • Reset Output
  • Small Size
    • 2.75mm x 2.15mm (0.7mm max height) WLP
    • 30-Bump, 0.4mm Pitch, 6 x 5 Array
    • 15.2mm2 Total Solution Size

Applications/Uses

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

Description

The MAX77680/MAX77681 is a 3-channel single-inductor multiple-output (SIMO) buck-boost regulator that regulates three independent rails using only 3µA of quiescent current (IQ). The SIMO improves battery life by replacing inefficient LDOs while being competitive in efficiency to traditional single-output bucks.

The SIMO operates on a input supply 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 device integrates a flexible power sequencer (FPS) to control power-up/down order of each output. The default output voltages and sequence can be programmed at the factory. An I2C serial interface is used to further configure the device.

The MAX77680/MAX77681 is available in a 30-bump wafer-level package (WLP). Total solution size is only 15.5mm2. For a similar product with an LDO and battery charger, refer to the MAX77650 data sheet.

Simplified Block Diagram

MAX77680, MAX77681: Simplified Application Circuit MAX77680, MAX77681: Simplified Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .