Analog Devices Inc./Maxim Integrated MAX17543EVKITB#

Overview

MAX17543EVKITB# from Maxim Integrated is an evaluation kit for the MAX17543 4.5V–42V, 2.5A synchronous step-down DC-DC converter with integrated MOSFETs, internal compensation, and programmable switching frequency (100kHz–2.2MHz). It supports PWM/PFM/DCM modes, delivers ±1.1% FB regulation accuracy over –40°C to +125°C, and enables rapid validation of industrial power supply designs.

For engineers reviewing the MAX17543EVKITB# datasheet, MAX17543EVKITB# pinout, MAX17543EVKITB# application, or MAX17543EVKITB# equivalent, this kit provides a fully assembled, tested reference design with documented layout, BOM, test points, and performance characterization data-including efficiency curves, load/line regulation, EMI plots, and Bode analysis-for immediate prototyping of high-voltage point-of-load converters.

Technical Context

The MAX17543EVKITB# implements the MAX17543 IC in a TQFN-20 (4mm × 4mm) package with exposed pad, configured per the typical 5V/2.5A application circuit: 10µH inductor, 2.2µF input/output ceramic capacitors, 178kΩ/39kΩ feedback divider, and 40.2kΩ RT resistor setting 500kHz switching frequency. It includes all critical support components-BST capacitor (0.1µF), soft-start capacitor (5600pF), loop compensation capacitor (5.6nF), and RESET pull-up-fully optimized for thermal performance and EMI compliance.

This kit validates key system-level behaviors: monotonic startup into prebiased loads, hiccup-mode overload protection (32,768-cycle timeout), open-drain RESET assertion at 92% V_{FB_REG}, and external clock synchronization (1.1×–1.4× f_SW). It demonstrates peak efficiency >90% at 24V_IN/5V_OUT, <2.8µA shutdown current, and operation across –40°C to +125°C ambient.

Key Specifications

Availability

MAX17543EVKITB# is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and high-voltage single-board systems requiring stable component supply, fast design validation, and production-ready reference layouts.

Supply support for MAX17543EVKITB# 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 applications.

The MAX17543 product line targets high-input-voltage DC-DC conversion in harsh environments, delivering robust, compact, and efficient point-of-load regulation without external compensation or Schottky diodes.

FAQ

What is the primary function of the MAX17543EVKITB#?

The MAX17543EVKITB# is a fully assembled evaluation kit for the MAX17543 synchronous step-down DC-DC converter. It enables engineers to validate performance-including efficiency, transient response, thermal behavior, and protection features-of the MAX17543 IC under real-world conditions using a production-grade PCB layout, documented BOM, and test points aligned with the official Maxim reference design.

Does the MAX17543EVKITB# support adjustable output voltage?

Yes, the MAX17543EVKITB# supports adjustable output voltage via the MAX17543's feedback divider. The default configuration delivers 5V using 178kΩ and 39kΩ resistors, but users can replace these to set any output from 0.9V to 0.9×VIN. The MAX17543EVKITB# documentation includes formulas and layout guidance for safe reconfiguration while maintaining stability and regulation accuracy.

Can the MAX17543EVKITB# operate in PFM or DCM mode?

Yes, the MAX17543EVKITB# supports all three control modes-PWM, PFM, and DCM-via the MODE pin. Jumper options on the board allow direct connection of MODE to SGND (PWM), VCC (DCM), or leave open (PFM). The kit's test reports include comparative efficiency curves, startup waveforms, and light-load behavior for each mode, confirming functional validation per the MAX17543 datasheet.

What thermal performance data is provided with the MAX17543EVKITB#?

The MAX17543EVKITB# documentation includes measured thermal performance: junction-to-ambient θ_JA = 33°C/W (multilayer board), junction-to-case θ_JC = 2°C/W, and thermal shutdown activation at +165°C with 10°C hysteresis. IR images and temperature rise vs. load data are provided for the 5V/2.5A configuration, confirming safe operation at full load in still air without forced cooling.

Is external synchronization supported on the MAX17543EVKITB#?

Yes, the MAX17543EVKITB# includes a dedicated SYNC input connector and routing compliant with the MAX17543's synchronization specification: external clock frequency must be 1.1× to 1.4× the programmed f_SW, with >50ns pulse width. The kit's test report validates SYNC lock acquisition and jitter performance at 700kHz (1.4× 500kHz), including waveform captures showing clean LX edge alignment.