Analog Devices Inc./Maxim Integrated MAX17546EVKITA#

Overview

MAX17546EVKITA# from Maxim Integrated is an evaluation kit for the MAX17546 4.5V–42V, 5A synchronous step-down DC-DC converter with internal compensation and peak current-mode control. It supports adjustable output voltages from 0.9V to 90% of VIN, operates in PWM/DCM/PFM modes, and delivers up to 95% peak efficiency in industrial power supplies.

For engineers reviewing the MAX17546EVKITA# datasheet, MAX17546EVKITA# pinout, MAX17546EVKITA# application, or MAX17546EVKITA# equivalent, this kit enables rapid validation of high-voltage buck regulation in base-station power, distributed supply, and high-voltage single-board systems - with full support for soft-start, RESET monitoring, EXTVCC switchover, and external frequency synchronization.

Technical Context

The MAX17546EVKITA# implements a complete reference design for the MAX17546 IC, featuring a 5mm × 5mm 20-pin TQFN package, 4.7µH inductor (XAL8080-472), dual 22µF/10V X7R output capacitors, and optimized layout for thermal management via exposed pad grounding. It validates all three operating modes (PWM, DCM, PFM) using the MODE/SYNC pin configuration and supports switching frequencies from 100kHz to 2.2MHz via RT resistor selection.

This kit integrates critical protection features verified per the IC's specification: hiccup-mode overload response, DL-to-LX short detection, monotonic startup into prebiased loads, and ±1.4% FB regulation accuracy over –40°C to +125°C ambient. The board includes dedicated test points for VIN, VOUT, LX, SS, RESET, and MODE/SYNC signals for real-time waveform analysis.

Key Specifications

Availability

MAX17546EVKITA# is available at Aetrix Electronics and suitable for industrial power supplies, base-station power supplies, and high-voltage single-board systems requiring stable component supply, fast prototyping turnaround, and production-ready reference design validation.

Supply support for MAX17546EVKITA# 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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The MAX17546EVKITA# belongs to Maxim's high-voltage DC-DC evaluation kit product line, engineered to accelerate design-in of robust, wide-input-range buck converters for harsh-environment power systems.

FAQ

What is the primary function of the MAX17546EVKITA# evaluation kit?

The MAX17546EVKITA# is a fully assembled and tested evaluation platform for the MAX17546 synchronous step-down DC-DC converter. It enables engineers to validate key performance metrics-including efficiency, transient response, mode switching (PWM/DCM/PFM), RESET timing, and thermal behavior-under real-world conditions before committing to custom PCB design. The MAX17546EVKITA# includes all necessary passive components, test points, and documented layout practices aligned with Maxim's reference design.

Does the MAX17546EVKITA# support external frequency synchronization?

Yes, the MAX17546EVKITA# supports external clock synchronization via the MODE/SYNC pin. When an external clock signal (1.1× to 1.4× the internal fSW) is applied to this pin, the MAX17546 synchronizes its switching frequency while maintaining stable regulation. The kit includes direct access to the MODE/SYNC net and confirms synchronization capability through measured waveforms in the user guide, enabling EMI-sensitive applications like base-station power where deterministic switching is required.

Can the MAX17546EVKITA# be used to evaluate EXTVCC switchover functionality?

Yes, the MAX17546EVKITA# implements the EXTVCC switchover feature as specified in the MAX17546 datasheet. It includes a 4.7Ω resistor and 0.1µF capacitor between the output and EXTVCC pin, allowing seamless transition from VIN-powered VCC to output-powered VCC above 4.84V. This configuration reduces power dissipation and improves system efficiency at higher input voltages - verified by measuring VCC current draw and thermal rise during operation across 12V, 24V, and 36V input conditions on the MAX17546EVKITA#.

How does the MAX17546EVKITA# implement hiccup-mode overload protection?

The MAX17546EVKITA# demonstrates hiccup-mode protection using the MAX17546's built-in current-limit architecture. When output current exceeds the programmed peak limit (e.g., 7.8A typical), the device enters hiccup mode after 32768 cycles of fault detection, disabling switching and asserting RESET low. Recovery occurs automatically after a timeout period. This behavior is observable on the MAX17546EVKITA# using the RESET test point and confirmed via oscilloscope capture of repeated restart attempts under sustained overload.

Is the MAX17546EVKITA# compatible with prebiased load startup?

Yes, the MAX17546EVKITA# validates monotonic startup into prebiased loads - a critical requirement for hot-swap and redundant power systems. By applying a 2.5V prebias to the output and enabling EN/UVLO, the kit demonstrates controlled voltage ramp without reverse current or output overshoot. This behavior is documented in the MAX17546EVKITA# user guide with oscilloscope waveforms showing VOUT, IOUT, and EN/UVLO transitions, confirming compliance with the MAX17546's monotonic startup specification.