Analog Devices Inc./Maxim Integrated MAX77504QEVKIT#

Overview

MAX77504QEVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit for the MAX77504AAFC+ 3A high-efficiency buck converter in FC2QFN package. It supports input voltage range 2.6V–14V, configurable output 0.6V–6V (factory-set to 3.3V), switching frequency 500kHz–1.5MHz, FPWM/SKIP mode selection, and UVLO thresholds of 2.6V (rising) / 2.4V (falling). Designed for rapid validation of power supply designs in portable and battery-powered systems.

For engineers reviewing the MAX77504QEVKIT# datasheet, MAX77504QEVKIT# pinout, MAX77504QEVKIT# application, or MAX77504QEVKIT# equivalent, this page provides verified hardware configuration details, jumper-controlled operating modes (EN, FPWM/SYNC, RSEL), test point access (SUPS, OUTS, EN, POK, FPWM), and design guidance for output voltage and frequency tuning via feedback resistors and RSEL resistor selection.

Technical Context

The MAX77504QEVKIT# implements the MAX77504AAFC+ buck converter with integrated MOSFETs, supporting forced-PWM or skip-mode operation controlled via J2 jumper. Its RSEL configuration network (J3–J5) sets five-bit device parameters including switching frequency (FSW[1:0]), mid-band gain (GAIN[1:0]), and active discharge enable (ADEN).

Input and output sense points (SUPS/GNDS, OUTS/GNDS) enable high-accuracy voltage and efficiency measurements under load. The board accepts 20AWG twisted-pair wiring for VIN/PGND and load connections, and includes accessible GPIO test points (EN, FPWM/SYNC, POK) for real-time signal monitoring and control verification.

Key Specifications

Availability

MAX77504QEVKIT# is available at Aetrix Electronics and suitable for power management validation, DC-DC converter reference design verification, and battery-powered system prototyping requiring stable component supply and documented test-point accessibility.

Supply support for MAX77504QEVKIT# 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 precision analog, mixed-signal, and power management ICs for industrial, computing, communications, and consumer applications.

The MAX77504QEVKIT# belongs to Maxim's power management evaluation platform family, engineered to accelerate development of compact, high-efficiency buck regulators for space-constrained portable electronics and IoT edge devices.

FAQ

What is the default output voltage of the MAX77504QEVKIT# and how is it set?

The MAX77504QEVKIT# has a factory-default output voltage of 3.3V, established by the feedback resistor divider formed by R3 (49.9kΩ) and R4 (11.1kΩ) on the board. This configuration matches the typical application circuit for the MAX77504AAFC+ IC. Users can reconfigure the output voltage within 0.6V–6.0V by replacing R3 and/or R4 with values calculated using the IC's feedback equation, as specified in the MAX77504 datasheet.

How do I configure switching frequency on the MAX77504QEVKIT#?

Switching frequency on the MAX77504QEVKIT# is configured via the RSEL pin (U1 Pin 10) using a precision resistor (1% tolerance or better) connected between SEL and GND. The resistor value selects one of 32 configurations per Table 3 in the documentation - for example, 30.9kΩ sets FSW[1:0] = 0b10 (1MHz). Jumper positions J3–J5 provide optional mounting pads for R7, R8, or R6 to implement this configuration.

Does the MAX77504QEVKIT# support external clock synchronization?

Yes, the MAX77504QEVKIT# supports external clock synchronization via the FPWM/SYNC pin (U1 Pin 2). When J2 is set to position 1–2, the board enables externally synchronized forced-PWM mode. An external clock signal applied to the FPWM/SYNC test point must fall within the valid lock range, which depends on the internally selected switching frequency (determined by RSEL). Valid ranges are specified in the MAX77504 IC datasheet's Electrical Characteristics table.

What are the key test points accessible on the MAX77504QEVKIT#?

The MAX77504QEVKIT# provides color-coded Keystone test points for critical signals: red-labeled SUPS/GNDS for input voltage sensing, red-labeled OUTS/GNDS for output voltage sensing, and white-labeled EN, FPWM/SYNC, and POK for GPIO monitoring and control. These points allow non-invasive measurement and probing without soldering, enabling fast validation of startup behavior, regulation accuracy, and power-good assertion timing.

How is the enable function implemented on the MAX77504QEVKIT#?

The enable function on the MAX77504QEVKIT# is controlled via jumper J1. In its default position (1–2), J1 connects EN (U1 Pin 3) to VIN, enabling the MAX77504AAFC+ IC automatically at power-up. Moving J1 to position 2–3 ties EN to GND, disabling the converter. This hardware-level control allows safe power sequencing and quick functional isolation during debugging without modifying firmware or external logic.