Analog Devices Inc./Maxim Integrated MAX20040EVKIT#

Overview

MAX20040EVKIT# from Analog Devices is a fully assembled and tested evaluation kit designed to characterize the MAX20040 synchronous buck-boost converter IC. It delivers up to 1.2A output current with input voltage range +2V to +36V, operates at 400kHz switching frequency, consumes only 52µA quiescent current at no load, and provides PGOOD monitoring for regulated output verification in automotive power-supply designs.

For engineers reviewing the MAX20040EVKIT# datasheet, MAX20040EVKIT# pinout, MAX20040EVKIT# application, or MAX20040EVKIT# equivalent, this page details its hardware configuration, jumper-controlled operating modes (FPWM/skip), spread-spectrum enablement, proven PCB layout, and compatibility with MAX20039/MAX20040 and MAX26039/MAX26040 IC variants.

Technical Context

The MAX20040EVKIT# implements the MAX20040B (TQFN-20 EP) buck-boost controller in a fixed +5V output configuration. It supports external synchronization via the FSYNC pin, enables forced-PWM or skip-mode operation through jumper-selectable logic levels, and uses a dedicated PGOOD signal referenced to VBIAS for output-voltage regulation status indication.

Hardware features include a 4.7µH composite-core inductor (XAL5030-472ME), dual 22µF ceramic output capacitors (C12/C13), input bulk capacitance (47µF aluminum electrolytic C1), and precision feedback resistors (R2 = 51kΩ, R3 = 12kΩ) setting the 5V output. The board accommodates transient input up to +40V and includes test points for VIN, VOUT, PGOOD, FSYNC, and EN.

Key Specifications

Availability

MAX20040EVKIT# is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment power supplies, body electronics modules, and industrial 24V DC-powered embedded systems requiring stable component supply and rapid prototyping capability.

Supply support for MAX20040EVKIT# 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX20040EVKIT# belongs to Analog Devices' automotive-grade power management evaluation platform family, engineered specifically for validating buck-boost converters in harsh 12V/24V vehicle electrical environments with stringent EMC and reliability requirements.

FAQ

What is the primary function of the MAX20040EVKIT#?

The MAX20040EVKIT# is an evaluation kit used to validate the electrical performance, thermal behavior, and system integration of the MAX20040 synchronous buck-boost converter IC. It provides immediate operational capability without assembly, enabling rapid characterization of output regulation, efficiency, transient response, and PGOOD signaling under real-world input conditions ranging from +2V to +36V. The MAX20040EVKIT# is not a production power supply but a design-assist tool for power-system engineers.

Which IC variants does the MAX20040EVKIT# support?

The MAX20040EVKIT# is explicitly configured to evaluate the MAX20040B (5V, 1.2A, 400kHz), but its hardware and documentation confirm compatibility with the full MAX20039/MAX20040 and MAX26039/MAX26040 families. Component changes-such as resistor replacements and IC swaps-are documented in the bill of materials and schematic for alternate output voltages (+5V at 2.2MHz) or different current ratings. The MAX20040EVKIT# remains functional across these variants when modified per Analog Devices' guidelines.

How do I configure the MAX20040EVKIT# for forced-PWM mode?

To configure the MAX20040EVKIT# for forced-PWM (FPWM) mode across all load conditions, set the SYNC jumper (Jumper #4 in Table 1) to position 1–2 (FPWM-middle). This pulls the FSYNC pin high internally, disabling skip mode and ensuring continuous switching regardless of load level. FPWM mode improves output voltage ripple and simplifies EMI filtering but reduces light-load efficiency compared to skip mode. The MAX20040EVKIT# default jumper setting already configures FPWM operation.

Can the MAX20040EVKIT# be used to evaluate different output voltages?

Yes, the MAX20040EVKIT# supports evaluation of alternate output voltages beyond the default +5V, but requires component-level modifications. To change output voltage, adjust the FB divider resistors (R2 and R3) per the MAX20040 datasheet's feedback equation, and may require replacing U1 with a variant optimized for the target voltage and frequency. The MAX20040EVKIT# Bill of Materials and schematic provide reference values for +5V at 2.2MHz; all modifications must follow Analog Devices' layout and stability guidelines to maintain performance.

What test equipment is required to operate the MAX20040EVKIT#?

Required test equipment for basic operation of the MAX20040EVKIT# includes a 2V–36V, 3A DC power supply (capable of delivering 3A at 2V input), a digital multimeter (DMM) for verifying output voltage (target: 5V ±2%), and an oscilloscope to monitor switching frequency (~400kHz) at the inductor or LX pins. For full load testing, an electronic load capable of sinking up to 1.2A is recommended. All connections use standard test pads (SUP, GND1, OUT, GND) and jumpers pre-configured per Table 1 in the MAX20040EVKIT# user guide.