Analog Devices Inc./Maxim Integrated MAX25263EVKIT#

Overview

MAX25263EVKIT# from Analog Devices is a fully assembled and tested evaluation kit designed to demonstrate the MAX25263AFOC/VY+ 400kHz synchronous buck converter, operating from 3.5V to 65V input with fixed 5V output and 3A capability. It supports spread spectrum, external synchronization, PGOOD monitoring, and EXTVCC switchover for gate driver optimization in automotive and industrial power supply validation.

For engineers reviewing the MAX25263EVKIT# datasheet, MAX25263EVKIT# pinout, MAX25263EVKIT# application, or MAX25263EVKIT# equivalent, key selection considerations include its 400kHz switching frequency variant, 5V fixed-output configuration, 3A load capability, PGOOD signal accessibility, and compatibility with the MAX25263AFOC/VY+ IC in high-input-voltage DC-DC design verification.

Technical Context

The MAX25263EVKIT# implements the MAX25263AFOC/VY+ buck controller in a production-ready PCB layout with optimized thermal and EMI performance. It supports forced-PWM (FPWM) and skip-mode operation via SYNC pin control, and includes configurable spread spectrum (±6% frequency dither) enabled by SPS pin logic.

Hardware features include dedicated test points for VSUP, VOUT, PGOOD, BIAS, and SYNC; jumper-selectable modes (SYNC, SPS, EXTVCC); and a 10µH power inductor (XAL5050-103ME) matched to the 400kHz switching frequency. Input transient tolerance extends to 70V, and output regulation accuracy is monitored via PGOOD threshold (93.5%–108% of nominal).

Key Specifications

Availability

MAX25263EVKIT# is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC I/O modules, and 24V/48V DC-DC converter development requiring stable component supply, rapid prototyping validation, and production-grade layout reference.

Supply support for MAX25263EVKIT# 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 precision instrumentation, industrial automation, automotive safety, and communications markets.

The MAX25263EVKIT# belongs to Analog Devices' MAX25262/MAX25263 evaluation platform family, engineered specifically to accelerate design-in of high-voltage synchronous buck regulators for automotive and harsh-environment applications.

FAQ

What is the primary function of the MAX25263EVKIT#?

The MAX25263EVKIT# is a fully assembled evaluation kit that demonstrates the operation and performance of the MAX25263AFOC/VY+ 400kHz synchronous buck converter. It enables engineers to validate input range (3.5V–65V), fixed 5V output, 3A load capability, PGOOD signaling, and spread spectrum functionality without board-level assembly or layout risk.

Does the MAX25263EVKIT# support adjustable output voltage?

The MAX25263EVKIT# is configured for fixed 5V output per its variant designation, but the underlying MAX25263AFOC/VY+ IC supports adjustable outputs from 1V to 20V. To change VOUT, replace R5 and R6 using R5 = R6 × (VOUT/VFB − 1), where VFB = 1V (typ) and R6 = 100kΩ - full guidance is in the MAX25263 datasheet.

How is synchronization implemented on the MAX25263EVKIT#?

Synchronization on the MAX25263EVKIT# is controlled via the SYNC pin: pulled high for forced-PWM mode across all loads, pulled low for skip mode at light loads, or driven by an external clock to synchronize switching frequency. The MAX25263EVKIT# includes a dedicated SYNC test point and default jumper (1–2) for FPWM mode.

What does the PGOOD signal indicate on the MAX25263EVKIT#?

The PGOOD signal on the MAX25263EVKIT# is an open-drain output that asserts high when the 5V output is within regulation (93.5%–108% of nominal). It goes low during undervoltage or overvoltage faults and is accessible at TP_PGOOD for oscilloscope or logic analyzer monitoring during startup, load transients, and fault recovery testing.

Can the MAX25263EVKIT# be used to evaluate other ICs in the same family?

Yes - the MAX25263EVKIT# PCB layout supports evaluation of other MAX25262/MAX25263 variants, including the MAX25262AFOA/VY+ (2.1MHz version). However, changing the IC requires verifying inductor value (e.g., XAL5030-332ME for 2.1MHz), output capacitor count, and jumper settings per the target device's datasheet recommendations.