MAX77680

PRODUCTION

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

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

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.01

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Overview

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

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 (I_Q). 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 (1.8V_OUT, 3.7V_IN).

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.

Applications

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

Part Models: 2
1ku List Price: Starting From $2.01

Documentation

Data Sheet 1

MAX77680-MAX77681: 3-Output SIMO Buck-Boost Regulator with Power Sequencer and 3μA I_Q Data Sheet (Rev.0) 08/24/2018

User Guide 2

UG-6472: MAX77680/MAX77681 Programmer's Guide 08/30/2018

UG-6473: MAX77680/MAX77681 I²C-Compatible Serial Interface Implementation Guide 08/30/2018

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX77680AEWV+	Wafer-Level Package 5x6 Bump, Full Array	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77680AEWV+T	Wafer-Level Package 5x6 Bump, Full Array	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Charger ICs 3
MAX77650	PRODUCTION	Ultra-Low Power PMIC with 3-Output SIMO and Power Path Charger for Small Li+
MAX77734	RECOMMENDED FOR NEW DESIGNS	Ultra-Low Power Tiny PMIC with Power Path Charger for Small Li+ and 150mA LDO
MAX77278	PRODUCTION	Ultra-Low Power PMIC with 3-Output SIMO, Power Path Charger Optimized for Small Li+, 425mA Current Sink, and 8 GPIOs
Switching Regulators & Controllers 1
MAX77640	PRODUCTION	Ultra-Low Power PMIC with 3-Output SIMO, 150mA LDO, and Power Sequencer

Tools & Simulations

Software Development 2

Evaluation Kits

Evaluation Kit for the MAX77680/MAX77681

Buy Now View Details

Features and Benefits

Easy to Use
- GUI Drives I²C Interface
- Fully Assembled and Tested
Emulates System Loading
- On-Board Electronic Load for SIMO Buck-Boost Outputs
- Electronic Load has Steady-State, Transient, and Random Modes
Evaluates Both Push-Button and Slider-Switch On-Key Options

Product Details

The MAX77680/MAX77681 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77680/MAX77681. The EV kit allows for easy evaluation of the MAX77680/MAX77681 resources, including the SIMO and I²C interface.

Windows®-based software provides a user-friendly graphical interface as well as a detailed register-based interface to exercise the features of the MAX77680/MAX77681.

Applications

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

Resources

UG-6472: MAX77680/MAX77681 Programmer's Guide
8/30/2018

UG-6473: MAX77680/MAX77681 I²C-Compatible Serial Interface Implementation Guide
8/30/2018

MAX77680EVKIT Board Layout - Design Files
5/31/2023

MAX77680EVKIT ODB File - Design Files
6/1/2023

MAX77680EVKIT Solder Down ODB File - Design Files
6/1/2023

MAX77680EVKIT BOM
5/22/2023

Evaluation Kit for the MAX77680/MAX77681

Buy Now View Details

Features and Benefits

Easy to Use
- GUI Drives I²C Interface
- Fully Assembled and Tested
Emulates System Loading
- On-Board Electronic Load for SIMO Buck-Boost Outputs
- Electronic Load has Steady-State, Transient, and Random Modes
Evaluates Both Push-Button and Slider-Switch On-Key Options

Product Details

Windows®-based software provides a user-friendly graphical interface as well as a detailed register-based interface to exercise the features of the MAX77680/MAX77681.

Applications