Analog Devices Inc./Maxim Integrated MAX17640C12EVKIT#

Overview

MAX17640C12EVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit designed to characterize the MAX17640C high-voltage synchronous step-down DC-DC converter, which operates from 15V to 60V input and delivers up to 400mA at an adjustable 12V output with 500kHz fixed switching frequency. It supports selectable PWM/PEM modes, programmable UVLO, open-drain RESET, and thermal/overcurrent protection - ideal for industrial power supply validation and high-input-voltage embedded system design.

For engineers reviewing the MAX17640C12EVKIT# datasheet, MAX17640C12EVKIT# pinout, MAX17640C12EVKIT# application, or MAX17640C12EVKIT# equivalent, this kit enables rapid performance verification of the MAX17640C converter under real-world conditions including load transients, EMI compliance (CISPR32 Class B), efficiency vs. load, output ripple (<10mVpp at 400mA PWM), and startup behavior - with no soldering or layout required.

Technical Context

The MAX17640C12EVKIT# hosts the MAX17640C IC in a dedicated 12V adjustable application circuit, electrically isolated from the MAX17640A (3.3V) and MAX17640B (5V) sections on the same PCB. It implements a proven layout with X7R ceramic output capacitors (22µF/16V), 150µH/0.6A shielded inductor (L302), and resistor-programmable feedback network (R304/R305) for precise 12V output setting.

Key configurable features include jumper-based EN/UVLO threshold selection (default 15V startup via JU301 open), MODE selection (PFM/PWM via JU302), and optional hot-plug damping using C303 (22µF/100V electrolytic). The board complies with CISPR32 Class B conducted and radiated emissions limits when used with specified EMI filter components.

Key Specifications

Availability

MAX17640C12EVKIT# is available at Aetrix Electronics and suitable for industrial power validation, high-voltage DC-DC reference design, and embedded system bring-up requiring stable component supply and pre-verified performance data.

Supply support for MAX17640C12EVKIT# 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 MAX17640 series evaluation kits belong to Maxim's high-voltage DC-DC converter product line, engineered to accelerate adoption of robust, EMI-compliant power designs in harsh-input environments such as factory automation, distributed power systems, and transportation electronics.

FAQ

What is the primary function of the MAX17640C12EVKIT#?

The MAX17640C12EVKIT# is a ready-to-use evaluation platform for the MAX17640C synchronous step-down DC-DC converter. It enables engineers to validate key performance metrics - including efficiency, output ripple, load transient response, startup timing, and EMI behavior - without designing custom hardware. The MAX17640C12EVKIT# integrates all necessary passives, jumpers for mode/UVLO configuration, and a proven PCB layout compliant with CISPR32 Class B emissions standards.

Does the MAX17640C12EVKIT# support adjustable output voltage?

Yes - the MAX17640C12EVKIT# is configured for a 12V output using resistive feedback divider R304 (499kΩ) and R305 (40.2kΩ), but the underlying MAX17640C device supports adjustable output from 0.9V to 0.89×VIN. Users can reprogram the output by replacing these resistors per the MAX17640 datasheet's "Adjusting the Output Voltage" section, maintaining stability and regulation across the full range.

How is input undervoltage lockout (UVLO) configured on the MAX17640C12EVKIT#?

UVLO is set via jumper JU301: when left open, the MAX17640C enables at VIN ≥15V; installing a shunt across pins 2–3 disables the converter. This matches the MAX17640C's internal UVLO threshold programming capability. An external signal may also drive the EN/UVLO pin through a minimum 1kΩ series resistor to suppress ringing, as specified in the MAX17640 datasheet.

Can the MAX17640C12EVKIT# operate in both PWM and PFM modes?

Yes - MODE selection is controlled by jumper JU302: open for PFM (light-load efficiency optimization), shunt across pins 1–2 for PWM (fixed-frequency operation). Performance plots in the user guide confirm distinct efficiency curves and output voltage regulation behavior for both modes across 5mA–400mA loads.

What are the critical EMI mitigation features built into the MAX17640C12EVKIT#?

The MAX17640C12EVKIT# incorporates multiple EMI-reduction techniques: an integrated input EMI filter (with optional L201/C202/C204 components), optimized high-frequency layout with minimized loop areas, X7R ceramic output capacitors (C309, 22µF/16V), and shielding-compatible inductor placement. Radiated and conducted emissions testing confirms compliance with CISPR32 Class B limits across 15V–60V input and 0–400mA load conditions.