Analog Devices Inc./Maxim Integrated MAX17631C5EVKIT#

Overview

The MAX17631C5EVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit designed to validate the MAX17631C synchronous step-down DC-DC converter in 5V/1.5A output applications. It operates from a 6.5V–36V input, delivers regulated 5V output with ±2% line/load regulation, features 400kHz fixed switching frequency, adjustable UVLO via resistor divider, and supports PWM/DCM/PFM mode selection via jumper configuration.

For engineers reviewing the MAX17631C5EVKIT# datasheet, MAX17631C5EVKIT# pinout (jumper-configurable EN/UVLO, MODE/SYNC, RESET, SS), MAX17631C5EVKIT# application (industrial power rail validation, EMI-compliant buck design verification), or MAX17631C5EVKIT# equivalent (evaluation platforms for 5V industrial DC-DC converters), this kit provides a CISPR22 Class B-compliant reference layout with thermal and conducted/radiated EMI optimization.

Technical Context

The MAX17631C5EVKIT# implements the MAX17631C IC in a fixed 5V output configuration using external feedback resistors (R3 = 243kΩ, R4 = 53.6kΩ) and a 15µH power inductor (XAL5050-153ME). Its PCB layout integrates dedicated footprints for optional conducted EMI filter components (L2, C13/C14) and includes an electrolytic input capacitor (C6 = 22µF/50V) to dampen hot-plug transients from long input cables.

Mode control is implemented via JU2 shunt position: pins 2–3 shorted enables PWM mode (default), pins 1–2 enables DCM, and open enables PFM. The RESET signal is active-low, open-drain, asserting when VOUT drops below 92% of nominal (4.6V) and deasserting above 95% (4.75V), with timing verified under 1.5A load conditions.

Key Specifications

Availability

MAX17631C5EVKIT# is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system DC-DC design verification, and EMI-compliant buck converter prototyping requiring stable component supply and traceable reference hardware.

Supply support for MAX17631C5EVKIT# 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 MAX17631 product line delivers high-efficiency, wide-input synchronous buck converters targeting space-constrained industrial power supplies where EMI compliance and thermal robustness are critical.

FAQ

What input voltage range does the MAX17631C5EVKIT# support?

The MAX17631C5EVKIT# supports an input voltage range of 6.5V to 36V DC, enabling evaluation across common industrial bus voltages including 12V, 24V, and 36V systems. Operation outside this range may damage the MAX17631CATE+ IC or compromise regulation stability, and the board's input protection circuitry is optimized specifically for this defined window.

How is the 5V output voltage set on the MAX17631C5EVKIT#?

The MAX17631C5EVKIT# sets its 5V output using a fixed resistor divider network: R3 = 243kΩ and R4 = 53.6kΩ connected to the FB pin of the MAX17631CATE+, yielding a precise 5.00V ±2% output under all tested line, load, and temperature conditions as confirmed in the EV kit performance report.

Does the MAX17631C5EVKIT# include EMI filtering components?

The MAX17631C5EVKIT# includes designated footprints for optional conducted EMI filter components (L2, C13, C14) but ships with those positions unpopulated. To meet CISPR22 Class B limits, users must install the specified filter parts and cut the L2 trace - the base configuration (L2 shorted, C13/C14 open) meets Class B without additional filtering.

Can the MAX17631C5EVKIT# be synchronized to an external clock?

Yes, the MAX17631C5EVKIT# supports external clock synchronization via the MODE/SYNC PCB pad. When an external clock signal is applied and JU3 is left open, the MAX17631CATE+ operates exclusively in PWM mode at the injected frequency - this capability is validated in the schematic and layout documentation.

What protection features are implemented on the MAX17631C5EVKIT#?

The MAX17631C5EVKIT# implements overcurrent protection (hiccup-mode current limiting), overtemperature shutdown (via MAX17631CATE+ internal thermal sensor), and input undervoltage lockout (programmable via R1/R2 divider on EN/UVLO pad). All protections are functional and tested per the EV kit quick-start procedure.