Analog Devices Inc./Maxim Integrated MAX77756EVKIT#

Overview

MAX77756EVKIT# from Maxim Integrated is an evaluation kit for the MAX77756 24V-input, 500mA synchronous buck converter with integrated dual-input power multiplexer (MUX). It enables rapid validation of power-path redundancy, I²C-programmable output voltage (1.5V–7.5V), and ultra-low quiescent current (1.5μA) in battery-backed USB PD accessories and smart home hubs.

For engineers reviewing the MAX77756EVKIT# datasheet, MAX77756EVKIT# pinout, MAX77756EVKIT# application, or MAX77756EVKIT# equivalent, this kit provides full access to the MAX77756's dual-input ORing MUX control, programmable peak inductor current limit (700–1000mA), soft-start timing (4–8ms), spread-spectrum switching, and Power-OK monitoring - all on a pre-layout PCB with test points, jumpers, and I²C interface headers.

Technical Context

The MAX77756EVKIT# implements the MAX77756 IC in its native 15-bump wafer-level package (2.33mm × 1.42mm), supporting both internal feedback (factory-set 1.8V/3.3V/5.0V) and external resistor-adjusted output (1V to 99% VSUP). The board routes all 15 bumps-including IN1, IN2, SUP, LX, OUT/FB, POK, ILIM, SDA, SCL, EN, VIO, BIAS, AGND, PGND, and BST-with proper decoupling (1μF BST, 1μF BIAS, 22μF OUT), thermal vias, and 0.4mm-pitch land pattern (Land Pattern #90-100052).

It exposes hardware- and software-based enable control, I²C-configurable VOUT and ILX-PEAK, and real-time monitoring of POK status and load transient response. The kit supports evaluation under dual-source switchover (e.g., main battery + backup battery), line/load regulation testing, and efficiency measurement across 3V–24V input and 1.5V–7.5V output ranges at up to 500mA continuous load.

Key Specifications

Availability

MAX77756EVKIT# is available at Aetrix Electronics and suitable for USB Type-C PD accessory development, notebook/tablet power architecture validation, home automation hub design, and battery-powered backup rail qualification requiring stable component supply and fast-turn evaluation support.

Supply support for MAX77756EVKIT# 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, computing, and consumer applications.

The MAX77756 product line targets space-constrained, multi-rail portable systems requiring automatic dual-source selection, ultra-low IQ, and programmable regulation - specifically addressing USB PD accessories, smart hubs, and battery-failed backup architectures.

FAQ

What is the primary function of the MAX77756EVKIT#?

The MAX77756EVKIT# is an evaluation platform for the MAX77756 IC, enabling engineers to validate its dual-input power MUX behavior, I²C-programmable buck regulation (1.5V–7.5V), ultra-low quiescent current operation (1.5μA), and Power-OK signaling in real-world USB PD, smart hub, and backup battery applications. It includes all necessary passive components, test points, and interface headers for immediate lab use.

Does the MAX77756EVKIT# support both internal and external feedback configurations for the MAX77756?

Yes, the MAX77756EVKIT# supports both configurations. Jumper options allow selection between factory-default internal feedback (1.8V/3.3V/5.0V) and external resistor divider feedback (1V to 99% VSUP). The board includes dedicated pads and routing for the 5.6pF feed-forward capacitor required in external feedback mode, ensuring accurate VOUT programming per MAX77756 datasheet specifications.

How is the dual-input power MUX evaluated using the MAX77756EVKIT#?

The MAX77756EVKIT# provides independent input terminals for IN1 and IN2, each with adjustable DC supplies and voltage monitoring. Engineers can observe automatic switchover between sources (e.g., 5V main battery → 3.7V backup) via oscilloscope measurements on SUP and POK, verify 400mV channel hysteresis, confirm no cross-conduction, and validate 250mΩ R_ON performance under load - all while monitoring efficiency and thermal behavior.

Can the MAX77756EVKIT# be used to configure the MAX77756 via I²C?

Yes. The MAX77756EVKIT# includes standard 4-pin I²C headers (VIO, SDA, SCL, GND) compatible with common host adapters (e.g., Bus Pirate, Analog Devices EVAL-ADP1046). It supports full register access to configure output voltage, peak inductor current limit (ILX-PEAK), soft-start time, spread-spectrum enable, and enable bit - as documented in the MAX77756 datasheet revision 1 (10/17).

What thermal and protection features of the MAX77756 can be verified with the MAX77756EVKIT#?

The MAX77756EVKIT# enables verification of thermal shutdown (165°C, 15°C hysteresis), short-circuit hiccup mode, and soft-start ramp (4ms or 8ms selectable via SOFT_ST bit). Its four-layer PCB layout with thermal vias under the WLP package and accessible PGND/AGND planes allows direct junction temperature estimation and safe stress testing up to 500mA continuous load at 24V input.