Analog Devices Inc./Maxim Integrated MAX17644C5EVKIT#

Overview

The MAX17644C5EVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit designed to demonstrate the MAX17644C high-efficiency, high-voltage Himalaya synchronous DC-DC converter. It delivers up to 2.7A at a fixed 5V output (VOUT3), operates at 500kHz switching frequency, supports 6.5V–36V input range, features programmable UVLO, adjustable soft-start, open-drain RESET, and external clock synchronization - ideal for industrial power supply validation and EMI-compliant design prototyping.

For engineers reviewing the MAX17644C5EVKIT# datasheet, MAX17644C5EVKIT# pinout, MAX17644C5EVKIT# application, or MAX17644C5EVKIT# equivalent, key selection considerations include its CISPR32 Class B conducted/radiated emissions compliance, proven PCB layout optimized for thermal and EMI performance, PWM/PFM/DCM mode selection via jumpers, and support for hot-plug input with optional electrolytic input capacitor.

Technical Context

The MAX17644C5EVKIT# implements the MAX17644C IC in a fixed 5V output configuration with 500kHz switching frequency, enabling evaluation of high-efficiency step-down conversion across a 6.5V–36V input range. It integrates resistor-programmable EN/UVLO thresholds (default rising threshold: 6.4V), jumper-selectable operation modes (PWM/DCM/PFM), and an adjustable soft-start time set by a 5600pF capacitor (C306).

Hardware provisions include dedicated MODE/SYNC pads for external clock synchronization (enabling forced PWM mode), RESET monitoring with 95% VOUT rise detection and 92% fall threshold, and optional conducted EMI filter footprints compliant with CISPR32 Class B limits when L302 and C315–C317 are populated.

Key Specifications

Availability

The MAX17644C5EVKIT# is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system power architecture development, and EMI-compliant DC-DC converter qualification requiring stable component supply and full pre-assembled reference hardware.

Supply support for MAX17644C5EVKIT# 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 industrial, automotive, and communications applications.

The MAX17644C5EVKIT# belongs to the Himalaya family of high-voltage synchronous buck converters, engineered for rugged industrial power supplies where efficiency, EMI robustness, and thermal reliability across wide input ranges are critical.

FAQ

What is the primary function of the MAX17644C5EVKIT#?

The MAX17644C5EVKIT# is a dedicated evaluation platform for the MAX17644C synchronous step-down DC-DC converter. It provides a fully assembled, tested, and EMI-optimized circuit to validate 5V/2.7A power delivery across 6.5V–36V inputs, supporting mode selection, soft-start tuning, UVLO programming, and external clock synchronization - all without requiring custom PCB design.

Does the MAX17644C5EVKIT# support multiple operating modes?

Yes, the MAX17644C5EVKIT# supports PWM, PFM, and DCM modes via jumper JU302 (open = PFM, 2–3 = PWM, 1–2 = DCM). Mode selection directly affects light-load efficiency and output ripple - for example, PFM achieves >95% efficiency at 54mA load (toc09), while PWM maintains tight regulation at full 2.7A (toc07).

How is input undervoltage lockout configured on the MAX17644C5EVKIT#?

By default, the MAX17644C5EVKIT# enables the MAX17644C at VIN ≥6.4V (rising threshold) using R301 = 3.32MΩ and R302 = 825kΩ. Jumper JU301 left open enables this divider; installing a shunt across pins 2–3 disables the converter. External enable control is supported via the EN/UVLO3 pad when JU301 is open.

What EMI compliance does the MAX17644C5EVKIT# meet?

The MAX17644C5EVKIT# meets CISPR32 Class B conducted and radiated emissions limits when used with optional EMI filter components (L302 = 15µH, C315–C317 = 4.7µF/50V) installed per the BOM. Measured data shows peak emissions remain below Class B QP limits across 150kHz–30MHz (toc55–toc56).

Can the MAX17644C5EVKIT# be synchronized to an external clock?

Yes - the MAX17644C5EVKIT# provides MODE/SYNC3 pads for external clock injection. When a valid clock signal (e.g., 550kHz) is applied and jumper JU302 is open, the MAX17644C operates in forced PWM mode synchronized to that clock, as confirmed by waveform measurements (toc49–toc51).