Analog Devices Inc./Maxim Integrated MAX17645BEVKITB#

Overview

MAX17645BEVKITB# from Analog Devices is a fully assembled and tested evaluation kit designed to validate the MAX17645B synchronous step-down DC-DC converter in 5V output applications. It supports 7V–36V input, delivers up to 1A at 650kHz fixed-frequency PWM operation, achieves 91.1% peak efficiency (24V_IN/5V_OUT/0.6A), and includes programmable EN/UVLO, fixed 3.15ms soft-start, open-drain RESET, and CISPR32 Class B EMI-compliant layout.

For engineers reviewing the MAX17645BEVKITB# datasheet, MAX17645BEVKITB# setup diagram, MAX17645BEVKITB# test procedure, or MAX17645BEVKITB# schematic, this kit provides a production-ready reference for high-voltage buck converter integration, EMI optimization, and input undervoltage lockout configuration in industrial power supplies and embedded systems.

Technical Context

The MAX17645BEVKITB# implements a complete, optimized hardware platform for the MAX17645B IC - a high-efficiency, high-voltage synchronous buck converter in 2mm × 2mm TDFN package. It operates exclusively in constant-frequency PWM mode across all load conditions, distinguishing it from the PFM-based MAX17645DEVKITB# variant.

Its PCB layout integrates dual independent circuits (MAX17645B and MAX17645D) with electrically isolated power paths, dedicated EN/UVLO programming jumpers (JU101/JU201), RESET monitoring pads, and optional EMI filter footprints (L101/L201 cut traces). Input hot-plug protection is enabled via installed 22µF/50V electrolytic capacitors (C106/C206).

Key Specifications

Availability

MAX17645BEVKITB# is available at Aetrix Electronics and suitable for industrial power supply design, embedded system prototyping, and DC-DC converter qualification requiring stable component supply and repeatable test results.

Supply support for MAX17645BEVKITB# 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX17645BEVKITB# belongs to Analog Devices' high-voltage DC-DC evaluation kit portfolio, engineered to accelerate adoption of their synchronous buck converters in rugged, space-constrained, and EMI-sensitive applications.

FAQ

What is the primary function of the MAX17645BEVKITB#?

The MAX17645BEVKITB# is a fully assembled evaluation kit that demonstrates and validates the MAX17645B synchronous step-down DC-DC converter in a 5V output configuration. It enables engineers to verify electrical performance, thermal behavior, EMI characteristics, and control features-including EN/UVLO programming and RESET monitoring-without designing custom hardware. The MAX17645BEVKITB# operates exclusively in constant-frequency PWM mode and ships with all components populated and tested per Analog Devices' reference design.

How does the MAX17645BEVKITB# differ from the MAX17645DEVKITB#?

The MAX17645BEVKITB# is configured for constant-frequency PWM operation across all loads, while the MAX17645DEVKITB# uses pulse-frequency modulation (PFM) at light loads to improve efficiency. Both kits share identical input range (7V–36V), output (5V/1A), switching frequency (650kHz), and PCB layout-but differ in control mode firmware and default jumper settings. The MAX17645BEVKITB# is intended for applications prioritizing predictable EMI profile and timing stability over ultra-light-load efficiency.

Can the MAX17645BEVKITB# be used to evaluate other MAX17645 variants?

Yes - the MAX17645BEVKITB# board hosts two independent circuits: one for the MAX17645B (U101) and one for the MAX17645D (U201). While labeled as the "B" kit, it includes both ICs on the same PCB and allows separate evaluation of each device using dedicated VIN, VOUT, and control pads. The MAX17645BEVKITB# documentation explicitly states it evaluates "MAX17645B and MAX17645D", confirming dual-variant capability without hardware modification.

What are the key EMI mitigation features built into the MAX17645BEVKITB#?

The MAX17645BEVKITB# incorporates multiple EMI-reduction techniques: a proven PCB layout optimized for low loop area and ground integrity, designated footprints for optional conducted EMI filters (with cut traces at L101/L201), integrated 22µF/50V electrolytic capacitors (C106/C206) to dampen hot-plug oscillations, and component placement aligned with CISPR32 Class B radiated emission limits. These features collectively ensure the MAX17645BEVKITB# meets commercial EMC standards without external filtering in most applications.

How is input undervoltage lockout (UVLO) configured on the MAX17645BEVKITB#?

UVLO on the MAX17645BEVKITB# is configured via jumper JU101 and resistive divider R101/R102. With JU101 unshunted, the MAX17645B enables at ~6.85V (typ) input. Shunting pins 1–2 forces enable; shunting 2–3 disables. External control is supported via the EN/UVLO1 pad, with a recommended ≥1kΩ series resistor to suppress ringing. The MAX17645BEVKITB# schematic and Table 1 confirm these configurations, and the bill of materials lists precise resistor values (3.32MΩ and 715kΩ) enabling accurate UVLO threshold calculation per the IC's 1.215V ENR threshold.