Analog Devices Inc./Maxim Integrated MAX38904BEVK#TDFN

Overview

MAX38904BEVK#TDFN from Maxim Integrated is an evaluation kit designed to validate the MAX38904B low-noise 2A linear regulator in a 10-pin 3mm × 3mm TDFN package. It operates from 1.7V to 5.5V input, delivers up to 2A output current, supports resistor-configurable output voltage (0.6V–5.0V), and features a default 3.3V output set by 1% accurate feedback resistors.

For engineers reviewing the MAX38904BEVK#TDFN datasheet, MAX38904BEVK#TDFN pinout, MAX38904BEVK#TDFN application, or MAX38904BEVK#TDFN equivalent, this EV kit provides fully assembled, tested hardware with proven 2-layer PCB layout, terminal posts for IN/OUT/GND, jumper-controlled enable functionality, and test points for real-time voltage monitoring and load validation.

Technical Context

The MAX38904BEVK#TDFN implements the MAX38904B-ATD+ IC - a low-dropout linear regulator requiring only 100mV input-to-output headroom at full 2A load and delivering 5.1µV_RMS output noise (10Hz–100kHz). Its feedback network (R101 = 909kΩ, R102 = 200kΩ) sets the default 3.3V output per V_OUT = V_REF × (1 + R101/R102), where V_REF = 0.6V.

Enable control is implemented via shuntable 3-pin header JU101: pins 1–2 enable (EN tied to IN), pins 2–3 disable (EN tied to GND). The board includes banana jack terminals (108-0740-001) for IN, OUT, and GND, plus red/black test points (TP_OUT, TP_GND) and a power-ok indicator (POK).

Key Specifications

Availability

MAX38904BEVK#TDFN is available at Aetrix Electronics and suitable for LDO validation, power integrity testing, and low-noise supply qualification in industrial control, medical sensors, and portable instrumentation requiring stable component supply and rapid prototyping support.

Supply support for MAX38904BEVK#TDFN 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 high-performance analog, mixed-signal, and power management ICs for demanding applications in industrial, automotive, communications, and consumer systems.

The MAX38904B product line targets ultra-low-noise, high-current LDO applications where PSRR, thermal stability, and compact footprint are critical - especially in noise-sensitive signal chains and battery-powered equipment.

FAQ

What is the primary function of the MAX38904BEVK#TDFN?

The MAX38904BEVK#TDFN is a fully assembled evaluation kit that validates the electrical performance and layout implementation of the MAX38904B low-noise 2A LDO regulator. It provides accessible terminals, test points, and jumper-controlled enable functionality to accelerate design-in and power supply characterization without custom PCB development.

Does the MAX38904BEVK#TDFN include the MAX38904B IC?

Yes, the MAX38904BEVK#TDFN includes the MAX38904B-ATD+ IC pre-installed in its 10-pin TDFN package. This device is the exact production-grade component evaluated by the kit, ensuring correlation between bench measurements and final system behavior.

How is the output voltage configured on the MAX38904BEVK#TDFN?

The MAX38904BEVK#TDFN ships with a default 3.3V output set by precision 1% feedback resistors R101 (909kΩ) and R102 (200kΩ). To change the output voltage within 0.6V–5.0V, replace both resistors using the formula V_OUT = 0.6V × (1 + R101/R102), as specified in the MAX38904B datasheet.

What input power supply is required for the MAX38904BEVK#TDFN?

The MAX38904BEVK#TDFN requires a DC power supply rated for at least 5.5V and 5A. During full-load testing at 2A, input voltage should be reduced to ≥3.6V (e.g., 3.6V–5.5V) to limit power dissipation and maintain safe operating temperature on the 2-layer PCB.

Can the MAX38904BEVK#TDFN be used to evaluate other MAX38904 variants?

No - the MAX38904BEVK#TDFN is specifically designed for the MAX38904B variant in TDFN packaging. It uses the MAX38904B-ATD+ IC and matches its pinout, thermal pad layout, and feedback configuration. Other variants (e.g., MAX38904A or different packages) require separate evaluation hardware.