Analog Devices Inc./Maxim Integrated MAX77503AEVKIT#

Overview

MAX77503AEVKIT# from Maxim Integrated is an evaluation kit for the MAX77503 1.5A synchronous step-down DC-DC converter, designed to accelerate development of compact, battery-powered systems using 2-cell or 3-cell Li+/Li-ion batteries or USB-C power sources. It supports input voltages from 3V to 14V, I²C-programmable output from 0.8V to 5V (50mV steps), and factory-preset options at 1.2V, 1.8V, and 3.3V - enabling rapid validation of power rail design in portable drones, HD cameras, and space-constrained notebooks.

For engineers reviewing the MAX77503AEVKIT# datasheet, MAX77503AEVKIT# pinout, MAX77503AEVKIT# application, or MAX77503AEVKIT# equivalent, this kit provides full hardware access to the MAX77503's I²C interface, enable/power-OK control signals, soft-start configuration, SKIP/FPWM mode selection, and thermal/short-circuit protection monitoring - all on a pre-layout-optimized PCB with validated component selection and thermal management.

Technical Context

The MAX77503AEVKIT# implements the MAX77503 IC in a 12-bump wafer-level package (1.85mm × 1.4mm, 0.4mm pitch), featuring synchronous current-mode PWM control with integrated slope compensation and cycle-by-cycle peak current limiting. It supports dual operating modes: ultra-low-I_Q SKIP mode (9μA typical at 12V_SUP/1.8V_OUT) for light-load efficiency, and forced-PWM (FPWM) mode for low-noise, fixed-frequency operation at 1MHz or 550kHz.

Hardware control is enabled via dedicated EN and BIASEN pins, while software control uses a standard I²C interface (1MHz max clock, 7-bit slave address 0x66 or 0x67). Protection includes undervoltage lockout (2.9V UVLO threshold), active output discharge (100Ω internal resistor), hiccup-mode short-circuit response, and thermal shutdown at +165°C with +15°C hysteresis.

Key Specifications

Availability

MAX77503AEVKIT# is available at Aetrix Electronics and suitable for portable electronics development, battery-powered drone power subsystem validation, and USB-C embedded device reference design requiring stable component supply and fast-turn evaluation support.

Supply support for MAX77503AEVKIT# 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 solutions for industrial, automotive, and consumer applications.

The MAX77503 product line delivers ultra-compact, high-efficiency buck converters targeting space- and battery-life-constrained portable electronics - specifically engineered for 2-cell/3-cell Li-ion and USB-C powered devices where size, IQ, and dynamic voltage scaling are critical.

FAQ

What is the primary function of the MAX77503AEVKIT#?

The MAX77503AEVKIT# is an evaluation kit for the MAX77503 1.5A synchronous buck converter. It provides a fully assembled, tested PCB with all necessary passive components, test points, and jumpers to evaluate the IC's electrical performance, configure I²C registers, validate thermal behavior, and verify power sequencing in real-world 2S/3S battery or USB-C applications. The kit does not replace the MAX77503 IC but enables rapid prototyping and characterization of its capabilities.

Does the MAX77503AEVKIT# support both I²C and hardware control of the MAX77503?

Yes, the MAX77503AEVKIT# fully supports both control methods. Hardware control is implemented via accessible EN and BIASEN pins with onboard pull-up/pull-down options, while I²C communication uses dedicated SDA/SCL headers compatible with standard logic-level adapters. The kit includes preloaded firmware examples and register map documentation to configure output voltage, switching mode (SKIP/FPWM), soft-start time, and protection thresholds - allowing engineers to validate either standalone hardware enable or full software-driven dynamic voltage scaling using the MAX77503AEVKIT#.

Can the MAX77503AEVKIT# be used to evaluate different factory-default output voltages (e.g., 1.2V, 1.8V, 3.3V)?

Yes. The MAX77503AEVKIT# is configured to support evaluation of all three factory-preset versions of the MAX77503 (1.2V, 1.8V, and 3.3V internal feedback variants), as listed in the MAX77503 ordering table. Jumper-selectable feedback networks and onboard test points allow direct measurement of output regulation accuracy, load/line transient response, and efficiency curves for each preset - without requiring soldering or component replacement. This enables comparative analysis across common core rail requirements using the same MAX77503AEVKIT# platform.

What protection features can be observed and tested using the MAX77503AEVKIT#?

Using the MAX77503AEVKIT#, engineers can directly observe and test undervoltage lockout (UVLO at ~2.9V), thermal shutdown (+165°C), short-circuit hiccup mode (12ms retry interval), and active output discharge (via OUT/FB pin voltage decay after disable). Test points for LX, POK, and EN allow oscilloscope capture of fault timing and recovery behavior. The kit's layout includes thermal vias and copper pour aligned with the MAX77503 WLP die, enabling realistic thermal stress testing under sustained 1.5A load conditions - validating protection integrity before moving to custom PCB design.

Is the MAX77503AEVKIT# compatible with standard I²C host controllers and development environments?

Yes. The MAX77503AEVKIT# exposes standard 0.1"-spaced SDA and SCL headers compatible with common I²C master platforms including Arduino, Raspberry Pi, and Analog Devices' Precision Studio. It supports the MAX77503's default 7-bit I²C slave addresses (0x66 and 0x67) and operates within standard I²C timing specifications (1MHz max clock, 260ns setup/hold times). Example Python and C code for register read/write, voltage configuration, and mode control are provided in the MAX77503 datasheet Appendix and supported by Aetrix's technical documentation - ensuring immediate interoperability with existing firmware toolchains when using the MAX77503AEVKIT#.