Analog Devices Inc./Maxim Integrated MAX17634BEVKIT#

Overview

The MAX17634BEVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit designed to demonstrate the MAX17634B high-voltage synchronous step-down DC-DC converter in a 5V/4.25A output configuration, operating at 400kHz switching frequency with adjustable UVLO, soft-start, RESET, and external clock synchronization capabilities.

For engineers reviewing the MAX17634BEVKIT# datasheet, MAX17634BEVKIT# pinout, MAX17634BEVKIT# application, or MAX17634BEVKIT# equivalent, this EV kit enables rapid validation of input voltage range (6.5V–36V), efficiency performance across PWM/PFM/DCM modes, thermal layout integrity, and system-level features including open-drain RESET monitoring and hot-plug robustness with optional input damping.

Technical Context

The MAX17634BEVKIT# implements the MAX17634B IC in a fixed 5V output configuration using an 8.2µH power inductor (Coilcraft XAL6060-822ME), 47µF bulk input capacitor (Panasonic EEE-TG1H470UP), and optimized 4-layer PCB layout for thermal management and EMI control. It supports three operational modes-PWM, PFM, and DCM-selected via jumper JU2, each delivering distinct light-load efficiency trade-offs confirmed by published load-regulation and Bode plot data.

Key interface provisions include EN/UVLO programming via resistor divider (R1=3.32MΩ, R2=787kΩ), 1ms soft-start set by 5600pF capacitor C3, and MODE/SYNC pin accessible through JU2 for external clock injection. The board provides dedicated test points for VIN, VOUT, RESET, and EN/UVLO signals, enabling real-time measurement of startup behavior, transient response, and fault signaling under defined load conditions (e.g., 0.05A–4.25A).

Key Specifications

Availability

MAX17634BEVKIT# is available at Aetrix Electronics and suitable for industrial power supply validation, automotive subsystem prototyping, and embedded computing power architecture development requiring stable component supply and proven reference design fidelity.

Supply support for MAX17634BEVKIT# 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 analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.

The MAX17634B product line delivers high-efficiency, high-voltage synchronous buck converters targeting space-constrained, thermally demanding applications such as factory automation controllers, battery-powered test equipment, and distributed power architectures.

FAQ

What is the primary function of the MAX17634BEVKIT#?

The MAX17634BEVKIT# is a ready-to-use evaluation platform that demonstrates the MAX17634B synchronous step-down DC-DC converter operating at 5V/4.25A output. It allows engineers to validate performance metrics-including efficiency curves, transient response, soft-start behavior, and mode selection-without designing custom hardware. The MAX17634BEVKIT# includes all necessary components, jumpers, and test points for immediate bench testing with standard lab equipment.

Does the MAX17634BEVKIT# support external clock synchronization?

Yes, the MAX17634BEVKIT# supports external clock synchronization via the MODE/SYNC pin, accessible through jumper JU2. When JU2 is left unshunted, the SYNC input accepts an external clock signal, forcing the MAX17634B into PWM mode only. This capability enables deterministic timing alignment in multi-rail systems and reduces EMI through frequency dithering or master-clock locking-verified in the MAX17634BEVKIT# performance report.

How is the undervoltage lockout (UVLO) configured on the MAX17634BEVKIT#?

The MAX17634BEVKIT# configures UVLO using jumper JU1 and an onboard resistor divider (R1 = 3.32MΩ, R2 = 787kΩ), setting the turn-on threshold to approximately 6.4V when JU1 is open. Installing a shunt across pins 2–3 disables the converter. For custom thresholds, users can replace R1/R2 per the equation provided in the MAX17634BEVKIT# documentation-ensuring precise input voltage control without modifying the MAX17634B IC itself.

Can the MAX17634BEVKIT# operate in PFM or DCM mode?

Yes, the MAX17634BEVKIT# supports all three operating modes-PWM, PFM, and DCM-via jumper JU2. With JU2 set to position 2–3, the MAX17634B operates in PWM mode; unshunted, it enters PFM mode; and with shunt at 1–2, it runs in DCM mode. Efficiency vs. load current plots in the MAX17634BEVKIT# report confirm measurable improvements in light-load efficiency for PFM and DCM modes versus PWM.

What protection features are implemented on the MAX17634BEVKIT#?

The MAX17634BEVKIT# implements overcurrent protection (OCP), overtemperature protection (OTP), input undervoltage lockout (UVLO), and active-low open-drain RESET signaling-all inherent to the MAX17634B IC and verified on the board. RESET asserts low when VOUT drops below 92% of nominal (4.6V) and deasserts high above 95% (4.75V), providing reliable power-good monitoring directly accessible at the RESET test point on the MAX17634BEVKIT#.