Analog Devices Inc./Maxim Integrated MAX8546EVKIT

Overview

MAX8546EVKIT from Maxim Integrated is an evaluation kit for the MAX8546 step-down DC-DC controller IC, designed to demonstrate high-efficiency synchronous buck conversion using external n-channel MOSFETs. It supports input voltages from 2.7V to 28V, delivers adjustable output down to 0.8V, and operates at 300kHz with 165mV current-limit threshold - validated in telecom power supplies and PCI Express rail generation.

For engineers reviewing the MAX8546EVKIT datasheet, MAX8546EVKIT board layout, MAX8546EVKIT application circuit, or MAX8546EVKIT component selection guidance, this kit provides verified reference design, thermal performance data, and full schematic documentation for rapid prototyping of cost-sensitive 3A–6A point-of-load regulators.

Technical Context

The MAX8546EVKIT implements a voltage-mode PWM buck controller architecture with adaptive gate drivers, valley-current sensing via low-side MOSFET R_DS(ON), and integrated 5V LDO (VL) for internal biasing. It validates the MAX8546's lossless overcurrent protection, foldback short-circuit response, and soft-start ramp (6.8ms typical), all operating without external current-sense resistors.

This kit demonstrates the MAX8546's compatibility with aluminum electrolytic output capacitors, its undervoltage lockout (2.5V trip), and thermal shutdown at +160°C. The board uses the 10-pin µMAX package footprint and supports both 2.7V–5.5V and 10V–24V input configurations per Figures 1 and 2 of the MAX8545/MAX8546/MAX8548 datasheet.

Key Specifications

Availability

MAX8546EVKIT is available at Aetrix Electronics and suitable for telecom power supplies, PCI Express auxiliary rails, and notebook docking station supplies requiring stable component supply and fast-turn evaluation support.

Supply support for MAX8546EVKIT 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for industrial, communications, and computing applications.

The MAX8546EVKIT belongs to Maxim's step-down controller evaluation platform family, engineered to accelerate development of cost-sensitive, wide-input-range DC-DC converters using external n-channel MOSFETs and minimal BOM count.

FAQ

What is the primary function of the MAX8546EVKIT?

The MAX8546EVKIT is an evaluation kit that demonstrates the operation and performance of the MAX8546 synchronous step-down DC-DC controller IC. It provides a fully laid-out PCB with reference components, test points, and documentation to validate efficiency, transient response, thermal behavior, and protection features - enabling rapid design-in of the MAX8546 into end systems such as telecom power modules and PCIe supplies.

Does the MAX8546EVKIT include the MAX8546 IC?

Yes, the MAX8546EVKIT includes one pre-mounted MAX8546EUB+ IC in the 10-pin µMAX package. This device is soldered to the board and configured per the typical application circuits shown in the MAX8545/MAX8546/MAX8548 datasheet (Figures 1 and 2), with jumpers and test points allowing flexible input/output setup.

Can the MAX8546EVKIT be used to evaluate other parts in the family, like MAX8545 or MAX8548?

No - the MAX8546EVKIT is specifically optimized for the MAX8546, which has a 165mV current-limit threshold and 300kHz switching frequency. While the board shares the same 10-pin µMAX footprint, MAX8545 (320mV, 300kHz) and MAX8548 (320mV, 100kHz) require different compensation networks, timing components, and validation conditions; their use on this board is not supported or characterized.

What output voltages and load currents are validated on the MAX8546EVKIT?

The MAX8546EVKIT is validated for multiple configurations: 1.8V/3A and 1.8V/6A with 2.7V–5.5V input (Figure 1); and 2.5V/3A and 2.5V/6A with 10V–24V input (Figure 2). These setups follow the exact component values and layout rules specified in Tables 1a/1b and 2a/2b of the MAX8545/MAX8546/MAX8548 datasheet.

Is the MAX8546EVKIT RoHS-compliant and lead-free?

Yes, the MAX8546EVKIT uses the MAX8546EUB+ variant, denoted by the "+" suffix in the ordering table, confirming it is a lead-free, RoHS-compliant assembly. All passive components, PCB finish, and solder paste meet JEDEC J-STD-609 Category 1 requirements for halogen-free and lead-free manufacturing.