Analog Devices Inc./Maxim Integrated MAX15046EVKIT+

Overview

MAX15046EVKIT+ from Maxim Integrated is an evaluation kit for the MAX15046 40V synchronous step-down DC-DC controller, supporting input voltages from 4.5V to 40V and adjustable output voltages down to 0.6V with up to 25A load capability. It implements adaptive synchronous rectification, valley-mode current limiting, and digital soft-start/soft-stop-enabling monotonic startup into prebiased outputs without discharging the rail. The kit is used to validate high-efficiency buck converter designs for industrial power supplies and telecom base stations.

For engineers reviewing the MAX15046EVKIT+ datasheet, MAX15046EVKIT+ pinout, MAX15046EVKIT+ application, or MAX15046EVKIT+ equivalent, this evaluation platform provides verified reference design implementation-including layout-optimized PCB, calibrated component selection (R_RT, R_LIM, C_BST), thermal management structure, and functional test points-for rapid prototyping of 40V-input, high-current buck regulators using external MOSFETs.

Technical Context

The MAX15046EVKIT+ implements the MAX15046 controller in a fully assembled, tested 16-pin QSOP-EP reference design with integrated gate drivers (DH/DL), BST boost circuitry, and Kelvin-sense CSP interface. It validates the controller's valley-mode current sensing via low-side MOSFET R_DS(ON), hiccup-mode short-circuit protection, and adaptive dead-time control between DH and DL outputs.

Key validated subsystems include the internal 5.25V VCC linear regulator powering both logic and low-side driver (DRV), PGOOD open-drain monitoring with 90–97.5% V_FB threshold hysteresis, and EN-controlled power sequencing with ±5% accurate turn-on/turn-off thresholds. The kit supports switching frequency tuning from 100kHz to 1MHz via R_RT and full thermal shutdown at +150°C with 20°C hysteresis.

Key Specifications

Availability

MAX15046EVKIT+ is available at Aetrix Electronics and suitable for industrial PLCs, telecom base station power modules, and fieldbus coupler designs requiring stable component supply, fast design validation cycles, and production-ready reference schematics.

Supply support for MAX15046EVKIT+ 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 ICs for industrial, automotive, and communications applications.

The MAX15046 product line delivers high-voltage synchronous buck controllers optimized for rugged 40V-input environments with adaptive gate drive, R_DS(ON) current sensing, and robust fault handling-targeting space-constrained, thermally demanding power systems.

FAQ

What is the primary function of the MAX15046EVKIT+?

The MAX15046EVKIT+ is a fully assembled evaluation kit for the MAX15046 synchronous step-down controller. It enables engineers to rapidly prototype, validate, and characterize high-efficiency buck converter designs operating from 4.5V to 40V input, delivering up to 25A with adjustable output voltage down to 0.6V. The kit includes all critical passive components, thermal layout, test points, and documentation to verify MAX15046 functionality-including soft-start, hiccup-mode protection, and R_DS(ON)-based current sensing-without custom PCB development.

Does the MAX15046EVKIT+ include the MAX15046 IC?

Yes, the MAX15046EVKIT+ includes a populated MAX15046 IC in a thermally enhanced 16-pin QSOP-EP package. The controller is soldered onto the board and fully integrated with supporting circuitry-including BST capacitor, RT and LIM programming resistors, FB divider, input/output capacitors, and gate-drive routing-allowing immediate bench testing and performance measurement of the complete buck topology.

Can the MAX15046EVKIT+ be used to evaluate different switching frequencies?

Yes, the MAX15046EVKIT+ supports adjustable switching frequency from 100kHz to 1MHz via the RT pin. The kit ships with a default 49.9kΩ resistor setting (~300kHz), but users can replace R_RT with values such as 14.3kΩ (1MHz), 25.5kΩ (600kHz), or 150kΩ (100kHz) to evaluate trade-offs in efficiency, component size, and EMI. All frequency settings are validated for stable operation across temperature and load conditions on the MAX15046EVKIT+ board.

How does the MAX15046EVKIT+ implement current limiting without a sense resistor?

The MAX15046EVKIT+ leverages the MAX15046's built-in R_DS(ON)-based current sensing architecture. It uses the voltage drop across the external low-side MOSFET's on-resistance (measured at CSP and PGND) as the current-sense signal. The LIM pin accepts an external resistor (6kΩ–60kΩ) to set the valley current-limit threshold from 30mV to 300mV-eliminating the need for a discrete sense resistor while maintaining temperature compensation and cycle-by-cycle protection during overload or short-circuit events.

Is the MAX15046EVKIT+ suitable for prebiased output startup validation?

Yes, the MAX15046EVKIT+ fully validates monotonic startup into prebiased outputs-a key feature of the MAX15046. When powered with an output already biased (e.g., 1.0V, 2.0V, or 4.0V), the kit demonstrates zero reverse current injection, no output discharge, and controlled ramp-up via adaptive digital soft-start. Oscilloscope waveforms (including V_OUT, PGOOD, EN, and LX) are documented in the MAX15046 datasheet, and all behavior is reproducible on the MAX15046EVKIT+ hardware under real thermal and load conditions.