Analog Devices Inc./Maxim Integrated MAX77680EVKIT#

Overview

MAX77680EVKIT# from Maxim Integrated is an evaluation kit for the MAX77680 3-channel single-inductor multiple-output (SIMO) buck-boost regulator with integrated flexible power sequencer and 3μA quiescent current. It supports input voltage from 2.7V to 5.5V, delivers independently programmable outputs (SBB0–SBB2) from 0.8V to 5.25V, and enables glitchless buck-boost transitions for battery-powered hearables and wearables.

For engineers reviewing the MAX77680EVKIT# datasheet, MAX77680EVKIT# pinout, MAX77680EVKIT# application, or MAX77680EVKIT# equivalent, this kit provides validated hardware reference design, I²C-configurable power sequencing, real-world efficiency measurement capability, and complete layout guidance for ultra-compact 15.2mm² SIMO solutions in space-constrained IoT edge devices.

Technical Context

The MAX77680EVKIT# implements the full MAX77680 IC functionality-including three independent SIMO buck-boost channels, on-key hardware enable (nEN), power hold (PWR_HLD), open-drain interrupt (nIRQ), and reset output (nRST)-on a compact PCB with optimized thermal and EMI layout per Maxim's AN1891 land pattern. It includes all required passive components: 1.5μH inductors (LXA/LXB), BST/CSYS/CSBBx capacitors, and pull-up resistors for SDA/SCL.

It demonstrates factory-programmable default output voltages and sequencing order, supports I²C configuration via standard 400kHz/1MHz interface (7-bit slave address 0x48), and validates critical timing parameters including nEN debounce (30ms), nRST deassert delay (5.12ms), and FPS event periods (tEN = 1.28ms, tDIS = 2.56ms).

Key Specifications

Availability

MAX77680EVKIT# is available at Aetrix Electronics and suitable for low-power wearable development, hearable reference design validation, and IoT power architecture prototyping requiring stable component supply and fast-turn evaluation support.

Supply support for MAX77680EVKIT# includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for portable, industrial, and communications applications.

The MAX77680EVKIT# belongs to Maxim's ultra-low-power SIMO power management product line, designed specifically to replace inefficient LDO-based multi-rail systems in battery-critical devices like Bluetooth earbuds and fitness trackers.

FAQ

What is the primary function of the MAX77680EVKIT#?

The MAX77680EVKIT# is an evaluation kit for the MAX77680 SIMO buck-boost regulator. It provides a fully assembled, tested PCB that demonstrates the IC's 3-channel power conversion, flexible sequencing, I²C configuration, and ultra-low-quiescent-current operation. Engineers use the MAX77680EVKIT# to validate system-level power architecture before committing to custom design.

Does the MAX77680EVKIT# support both MAX77680 and MAX77681 devices?

No - the MAX77680EVKIT# is specifically designed and validated for the MAX77680. While the MAX77680 and MAX77681 share the same WLP30 package and core SIMO architecture, their output voltage ranges differ (e.g., MAX77680 SBB1 max = 1.5875V vs. MAX77681 = 5.25V), and the kit's default firmware, register settings, and test points align exclusively with MAX77680 specifications.

What interfaces does the MAX77680EVKIT# provide for host connection and control?

The MAX77680EVKIT# features a standard 0.1"-spaced 10-pin header supporting I²C (SDA/SCL), interrupt (nIRQ), reset (nRST), enable (nEN), and power hold (PWR_HLD) signals. It includes onboard level-shifting for 1.8V/3.3V VIO compatibility and pre-populated 4.7kΩ pull-ups for SDA/SCL. No USB or debug interface is integrated - host control is strictly via external microcontroller I²C master.

Can the MAX77680EVKIT# be used to measure real-world efficiency and load transient response?

Yes - the MAX77680EVKIT# includes test points for all input/output rails (VSYS, IN_SBB, SBB0–SBB2), dedicated current-sense pads for LXA/LXB, and provisioned locations for optional output capacitors. Its layout follows Maxim's recommended 4-layer stackup and thermal vias, enabling accurate efficiency measurement across 1mA–300mA loads and observation of glitchless buck-boost transitions under dynamic load steps.

Is factory programming of default output voltages and sequencing supported on the MAX77680EVKIT#?

Yes - the MAX77680EVKIT# ships with the MAX77680 preprogrammed with default output voltages and power-up/down sequence per the MAX77680 data sheet (Rev 0, 7/18). These factory-set values can be read and modified in real time via I²C, and nonvolatile storage allows retention across power cycles - enabling rapid evaluation without initial register configuration.