Monolithic Power Systems Inc. EV2228-J-00A

Overview

EV2228-J-00A from Monolithic Power Systems is a fully assembled evaluation board demonstrating the MP2228 synchronous step-down converter, delivering 3.3V/2A output from 6–16V input at 800kHz switching frequency, with integrated 100mΩ/40mΩ high-side/low-side MOSFETs and AAM power-save mode - used for rapid validation of notebook I/O and flat-panel display power rails.

For engineers reviewing the EV2228-J-00A datasheet, EV2228-J-00A pinout, EV2228-J-00A application, or EV2228-J-00A equivalent, this board enables immediate functional verification of MP2228's load transient response, thermal shutdown behavior, and adjustable output voltage capability under real-world PCB layout and component parasitic conditions.

Technical Context

The EV2228-J-00A implements the MP2228 IC in a fixed 3.3V output configuration using external resistive feedback (R1=40.2kΩ, R2=13kΩ), with 4.7μH power inductor (Wurth 744311470) and low-ESR ceramic output capacitors (22μF ×2, X5R/X7R). It operates in current-mode control with internal soft-start and hiccup-mode over-current protection.

Board-level design includes dedicated test points for VIN, VOUT, SW, FB, and GND; BST capacitor (C8 = 22nF) supports gate drive; and thermal relief on GND pads enhances heat dissipation during 2A continuous operation. The TSOT23-8 footprint matches MP2228DJ package dimensions and pad layout per MPS recommended land pattern.

Key Specifications

Availability

EV2228-J-00A is available at Aetrix Electronics and suitable for notebook system power validation, flat-panel TV auxiliary rail development, and distributed DC-DC subsystem prototyping requiring stable component supply and documented reference performance.

Supply support for EV2228-J-00A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC-DC conversion, LED drivers, and motor control solutions.

The MP2228 product line targets space-constrained, high-efficiency point-of-load applications in consumer and computing systems, emphasizing integration, thermal robustness, and ease of layout - embodied in the EV2228-J-00A evaluation platform.

FAQ

What input voltage range is supported on the EV2228-J-00A?

The board accepts 6V to 16V DC input, verified per MPS test data at VIN = 12V, 3.3V/2A output. Operation below 6V causes UVLO lockout; above 16V risks overstress on C1/C7 (rated 16V) and U1 internal circuitry.

Can the output voltage be adjusted, and how?

Yes - VOUT is set by the R1/R2 feedback divider (40.2kΩ/13kΩ for 3.3V). Replacing R1 or R2 allows adjustment from 0.8V to 16V × (R1+R2)/R2, constrained by MP2228's 0.8V reference and maximum duty cycle.

Does the board include thermal protection testing capability?

Yes - the MP2228 integrates thermal shutdown, and the board's copper pour and GND plane layout allow direct IR thermography of U1. Test reports confirm shutdown activation at ~150°C junction temperature, with automatic recovery after cooldown.

What is the purpose of the AAM mode, and how is it enabled?

AAM (Auto-Audio Mode) reduces switching frequency at light loads to maintain >85% efficiency while avoiding audible noise. It is always active on EV2228-J-00A - no external enable required - and transitions seamlessly between PWM and PFM based on output current.

Are test points provided for critical signals like SW and FB?

Yes - dedicated plated-through-hole test points labeled "VIN", "VOUT", "SW", "FB", and "GND" are placed adjacent to respective nodes, enabling oscilloscope probing without soldering or signal loading effects during dynamic testing.

Is the board RoHS-compliant and lead-free?

Yes - all components including MP2228DJ, Wurth inductor, and Murata capacitors meet RoHS Directive 2011/65/EU. MPS confirms full lead-free compliance and green status on its Quality Assurance portal.