Analog Devices Inc./Maxim Integrated MAX77504WEVKIT#

Overview

MAX77504WEVKIT# from Maxim Integrated is a fully assembled and tested evaluation kit for the MAX77504AAWE+ 3A high-efficiency buck converter IC. It supports input voltage range of 2.6V to 14V, delivers configurable output from 0.6V to 6V (factory-set to 3.3V), and enables switching frequency selection between 500kHz and 1.5MHz via RSEL resistor configuration. Designed for rapid validation of power supply designs in portable electronics.

For engineers reviewing the MAX77504WEVKIT# datasheet, MAX77504WEVKIT# pinout, MAX77504WEVKIT# application, or MAX77504WEVKIT# equivalent, this kit provides accessible test points for EN, POK, FPWM, OUTS, SUPS, and GNDS; configurable skip/FPWM mode; UVLO thresholds (2.6V rising / 2.4V falling); and verified layout with WLP-packaged MAX77504AAWE+.

Technical Context

The MAX77504WEVKIT# implements the MAX77504 buck converter in a 16-bump WLP package, with feedback resistors R3 (49.9kΩ) and R4 (11.1kΩ) setting the default 3.3V output. It includes five jumper positions (J1–J5, J7) for EN enable/disable, FPWM/SKIP mode selection, and RSEL configuration using potentiometer R6 or discrete resistors R7/R8.

Switching frequency, mid-band gain (RCOMP = 75kΩ to 200kΩ), and active discharge enable/disable are decoded from RSEL[4:0] - a 5-bit value set by resistor value per Table 3 (e.g., 30.9kΩ → 0x16 → 1MHz, 200kΩ RCOMP, ADEN disabled). Configuration is latched on EN rising edge when SUP is valid.

Key Specifications

Availability

MAX77504WEVKIT# is available at Aetrix Electronics and suitable for portable electronics validation, battery-powered system prototyping, and DC-DC power architecture review requiring stable component supply and pre-validated reference design.

Supply support for MAX77504WEVKIT# 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 analog, mixed-signal, and power management solutions for industrial, automotive, and consumer applications.

The MAX77504 product line targets compact, high-efficiency power conversion in space-constrained portable devices - delivering 3A output from ultra-small WLP packaging with configurable frequency, gain, and discharge control.

FAQ

What does the MAX77504WEVKIT# evaluate?

The MAX77504WEVKIT# evaluates the MAX77504AAWE+, a 3A, high-efficiency buck converter in a 16-bump WLP package. It provides a complete, tested hardware platform to validate input/output performance, efficiency, transient response, and configuration options - including RSEL-based frequency/gain selection and FPWM/SKIP mode operation - directly using the MAX77504WEVKIT# board.

How is output voltage configured on the MAX77504WEVKIT#?

Output voltage on the MAX77504WEVKIT# is configured via the feedback resistor divider formed by R3 and R4. With R3 = 49.9kΩ and R4 = 11.1kΩ, the default output is 3.3V. To change output voltage, replace either resistor using the formula VOUT = 0.6V × (1 + R3/R4), ensuring stability and proper compensation per the MAX77504 datasheet.

Can the MAX77504WEVKIT# operate in forced PWM mode?

Yes, the MAX77504WEVKIT# supports forced PWM mode via jumper J2. By moving shunt to position 1–2, FPWM is enabled, disabling skip mode and maintaining constant switching frequency under light loads. This improves noise predictability and reduces output voltage ripple - critical for noise-sensitive analog or RF subsystems powered by the MAX77504WEVKIT#.

What is the role of the RSEL pin on the MAX77504WEVKIT#?

The RSEL pin on the MAX77504WEVKIT# configures three key parameters of the MAX77504AAWE+: switching frequency (500kHz–1.5MHz), mid-band gain (RCOMP = 75kΩ–200kΩ), and active discharge enable/disable. Its 5-bit value is set by a precision resistor (e.g., 30.9kΩ → 0x16) connected between SEL and GND, decoded at EN rising edge - enabling flexible loop tuning without firmware changes on the MAX77504WEVKIT#.

Does the MAX77504WEVKIT# include test points for critical signals?

Yes, the MAX77504WEVKIT# includes dedicated test points labeled EN, FPWM, POK, OUTS, SUPS, and GNDS - all accessible via Keystone 5000/5002 series probes. These allow direct probing of enable status, forced-PWM control, power-good assertion, output voltage, input supply, and ground references without soldering or board modification - accelerating validation of the MAX77504WEVKIT# in lab environments.