Analog Devices Inc./Maxim Integrated MAX77533B33EVKIT#

Overview

MAX77533B33EVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit for the MAX77533BEWC33+ synchronous step-down converter, configured with internal feedback to deliver a default 3.3V output. It supports 3V–14V input, 1.5A continuous load, and USB-I²C GUI-controlled register programming. The kit enables rapid validation of buck regulator performance in power management subsystems for portable and embedded systems.

For engineers reviewing the MAX77533B33EVKIT# datasheet, MAX77533B33EVKIT# pinout, MAX77533B33EVKIT# application, or MAX77533B33EVKIT# equivalent, this kit provides hands-on access to programmable soft-start, SKIP mode operation, active discharge, I²C address configuration (0x24), and dual-range electronic load emulation - critical for evaluating transient response, efficiency, and system-level power sequencing.

Technical Context

The MAX77533B33EVKIT# implements the MAX77533BEWC33+ IC in internal feedback configuration, fixing R3 = 0Ω and R4 = open to enable software-controlled output voltage (0.8V–5V in 50mV steps). Its on-board USB-to-I²C interface uses MAX3395EETC level translation to support 1.8V/3.3V I²C bus voltage selection via jumper J101.

It integrates a dual-range electronic load (10mA/2.56A full-scale) driven by MAX5805AAUB+ DAC and MAX44251AUA+ op-amp, with sense resistors of 49.9Ω (10mA range) and 0.2Ω (2.56A range). Default settings include 1ms soft-start, 2A peak inductor current limit, and active discharge enabled (ADEN = 1).

Key Specifications

Availability

MAX77533B33EVKIT# is available at Aetrix Electronics and suitable for power supply design validation, DC-DC converter qualification, and embedded system power architecture prototyping requiring stable component supply and full technical support.

Supply support for MAX77533B33EVKIT# 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 solutions for industrial, automotive, and communications markets.

The MAX77533 product line delivers high-efficiency, small-footprint synchronous buck converters targeting space-constrained portable electronics and battery-powered IoT devices with stringent standby current and dynamic response requirements.

FAQ

What is the default output voltage of the MAX77533B33EVKIT#?

The MAX77533B33EVKIT# is preconfigured with the MAX77533BEWC33+ IC and ships with a default no-load output voltage of 3.38V at 12V input, as verified in Table 2 of the EV kit documentation. This reflects the internal feedback version's factory-programmed setting, adjustable in 50mV increments (0.8V–5V) via the GUI without hardware modification.

Does the MAX77533B33EVKIT# support external feedback configuration?

No - the MAX77533B33EVKIT# is specifically configured for internal feedback operation, with R3 = 0Ω and R4 = open. To evaluate external feedback, users must replace R3/R4 per the MAX77533AEWC+ datasheet and reconfigure jumpers; the board layout supports both modes, but the shipped MAX77533B33EVKIT# does not include those components populated.

How is I²C communication established with the MAX77533B33EVKIT#?

I²C communication with the MAX77533B33EVKIT# is established via its onboard USB-to-I²C translator (FT232RQ + MAX3395EETC), using a micro-B USB cable connected to a Windows PC. The GUI software reads the device's fixed 7-bit I²C address 0x24 and supports register read/write, output voltage control, and electronic load configuration without external logic analyzers or adapters.

What are the electronic load ranges supported by the MAX77533B33EVKIT#?

The MAX77533B33EVKIT# supports two electronic load ranges: 10mA full-scale (49.9Ω sense resistor, 2.5μA resolution) for low-current SKIP/DCM analysis, and 2.56A full-scale (0.2Ω sense resistor, 0.625mA resolution) for full 1.5A load testing and overload/short-circuit evaluation. Range selection is controlled via GUI toggle, not hardware jumpers.

Can the MAX77533B33EVKIT# be used to evaluate other MAX77533 variants?

Yes - the MAX77533B33EVKIT# PCB is mechanically and electrically compatible with all MAX77533 variants (e.g., MAX77533AEWC+, MAX77533BEWC18+). Users may rework R3/R4 and update firmware settings to evaluate external feedback or different default outputs; the board's silkscreen label and BOM reflect the shipped variant, not a hardware lock.