Analog Devices Inc./Maxim Integrated MAX20745EVKIT#

Overview

MAX20745EVKIT# from Maxim Integrated is an evaluation kit for the MAX20745 25A integrated step-down switching regulator, designed to validate high-efficiency point-of-load power delivery under real-world conditions including 12V input, 1V output, and 400kHz switching frequency. It supports fast transient response (up to 300A/µs), differential remote sensing, and programmable protection features including hiccup OCP and thermal shutdown.

For engineers reviewing the MAX20745EVKIT# datasheet, MAX20745EVKIT# pinout, MAX20745EVKIT# application, or MAX20745EVKIT# equivalent, this kit enables rapid validation of layout, thermal performance, efficiency, and dynamic behavior for telecom, networking, and server applications requiring stable 25A output with <1% VREF tolerance and 90.8% peak efficiency at 12V→1V.

Technical Context

The MAX20745EVKIT# implements a valley current-mode control architecture with fixed-frequency PWM operation and adaptive frequency scaling during load transients to minimize voltage deviation. It validates the IC's integrated high- and low-side MOSFETs, internal 1.85V LDO for VCC bias, and programmable soft-start (1.5ms/3ms) via R_SEL1.

This kit demonstrates the MAX20745's differential remote-sense capability with open-circuit detection on VSENSE+/VSENSE−, programmable overtemperature thresholds (130°C/150°C) via R_SEL2, and cycle-by-cycle overcurrent protection with four selectable OCP settings (9.3A–29.1A) determined by R_SEL3.

Key Specifications

Availability

MAX20745EVKIT# is available at Aetrix Electronics and suitable for telecom infrastructure, datacenter power validation, and high-density server design requiring stable component supply, repeatable thermal characterization, and production-ready layout verification.

Supply support for MAX20745EVKIT# 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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications across industrial, communications, and computing markets.

The MAX20745 product line delivers compact, high-efficiency, fully integrated DC-DC solutions for demanding point-of-load applications in networking, servers, and telecom equipment where space, thermal headroom, and transient response are critical.

FAQ

What is the primary purpose of the MAX20745EVKIT#?

The MAX20745EVKIT# is a fully assembled and tested evaluation platform for the MAX20745 25A integrated buck regulator. It enables engineers to verify electrical performance-including efficiency, transient response, thermal behavior, and protection functionality-under real operating conditions such as 12V input, 1V output, and 400kHz switching frequency, using the exact component values specified in Table 8 of the MAX20745 datasheet.

Does the MAX20745EVKIT# support different output voltages and switching frequencies?

Yes, the MAX20745EVKIT# supports configurable output voltages from 0.6484V to 5.5V and switching frequencies of 400kHz, 500kHz, 600kHz, 700kHz, 800kHz, or 900kHz. These are set via external resistor and capacitor networks on PGM1–PGM3 pins, as defined in Tables 2–7 of the MAX20745 datasheet. The kit ships configured for 1V/400kHz but can be reconfigured per application needs.

What PCB construction is used in the MAX20745EVKIT#?

The MAX20745EVKIT# uses a 4-layer PCB with 2oz copper on all layers, optimized for thermal dissipation and low-impedance power delivery. This construction matches the thermal resistance specification (θJA = 16.3°C/W in still air) and enables accurate validation of system-level efficiency and junction temperature rise, as documented in the MAX20745 datasheet Notes 4 and 10.

How does the MAX20745EVKIT# demonstrate remote sensing and fault detection?

The MAX20745EVKIT# implements Kelvin-connected differential remote sensing via VSENSE+ and VSENSE− pins, enabling precise load-point regulation and open-circuit fault detection. It validates the MAX20745's STAT pin behavior during PWRGD faults, OVP events, OTP trips, and BST node failures-all observable through the open-drain STAT output with user-provided pullup.

Can the MAX20745EVKIT# be used for production design sign-off?

Yes-the MAX20745EVKIT# is intended for pre-production validation and design sign-off. Its layout, bill of materials (per Table 8), and test conditions (e.g., VDDH = 12V, VOUT = 1V, fSW = 400kHz, TA = 25°C, still air) are explicitly referenced in the MAX20745 datasheet as the basis for published efficiency curves, SOA plots, and transient waveforms, making it a trusted reference for final schematic and layout review.