Monolithic Power Systems Inc. EV2225-J-00A

Overview

EV2225-J-00A from Monolithic Power Systems is an evaluation board demonstrating the MP2225 synchronous step-down converter IC, configured for 3.3V/5A output at 500kHz switching frequency with 4.5–18V input range, integrated 47mΩ/18mΩ MOSFETs, and TSOT23-8 packaging. It supports power-save mode, hiccup-mode OCP, and thermal shutdown in flat-panel TV, notebook I/O, set-top box, and distributed power applications.

For engineers reviewing the EV2225-J-00A datasheet, EV2225-J-00A pinout, EV2225-J-00A application, or EV2225-J-00A equivalent, this board enables rapid validation of MP2225's load regulation, transient response, efficiency up to 97%, soft-start behavior, and external clock synchronization capability across industrial and consumer DC-DC designs.

Technical Context

The EV2225-J-00A implements the MP2225 - a current-mode, fixed-frequency (500kHz) synchronous buck controller with internal high-side and low-side MOSFETs. Its control loop uses peak-current-mode architecture to deliver fast transient response and stable operation under wide VIN (4.5–18V) and VOUT (adjustable from 0.6V, preset to 3.3V) conditions.

Board-level design includes 3.3µH power inductor (Wurth 744314330), input/output ceramic capacitors (22µF X5R/X7R), precision feedback resistors (R1=40.2kΩ, R2=8.87kΩ), and 33pF compensation capacitor. Soft-start time is fixed at 2.4ms; reference accuracy is ±1% at room temperature.

Key Specifications

Availability

EV2225-J-00A is available at Aetrix Electronics and suitable for flat-panel television power stages, notebook system I/O supplies, and digital set-top box DC-DC conversion requiring stable component supply, quick-turn evaluation, and production-ready reference design fidelity.

Supply support for EV2225-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 expertise in DC-DC conversion, LED drivers, and motor control solutions since 1997.

The MP2225 product line targets compact, high-efficiency point-of-load regulators for space-constrained consumer and computing applications, emphasizing integration, thermal robustness, and ease of layout with minimal external components.

FAQ

What input voltage range does the EV2225-J-00A support?

The EV2225-J-00A accepts 4.5V to 18V DC input, validated per MP2225 specifications. This range accommodates common intermediate bus voltages including 5V USB-PD sources, 12V wall adapters, and 15V industrial supplies. Operation below 4.5V will disable regulation; above 18V risks permanent damage to U1 (MP2225-J).

Can the output voltage be adjusted, and how?

Yes - the output is factory-set to 3.3V using R1 (40.2kΩ) and R2 (8.87kΩ), but is fully adjustable from 0.6V upward by modifying the feedback resistor divider. The MP2225's 0.6V reference allows precise scaling; replacement resistors must maintain ≤1% tolerance and ≤100ppm/°C TCR for stability.

Does the board support external clock synchronization?

Yes - the MP2225 on EV2225-J-00A supports external clock synchronization from 200kHz to 2MHz via the SYNC pin (U1 Pin 7). This feature enables EMI reduction through frequency dithering or phase alignment with other converters in multi-rail systems without modifying board layout.

What protection features are implemented on this evaluation board?

The board inherits all MP2225 protections: cycle-by-cycle over-current protection (OCP) with hiccup-mode recovery, thermal shutdown at ~150°C junction temperature, and undervoltage lockout (UVLO) with 4.2V turn-on threshold. No additional discrete protection circuitry is required.

Is the EV2225-J-00A RoHS-compliant and lead-free?

Yes - both the MP2225-J IC and all bill-of-materials components (including Murata capacitors, Yageo resistors, and Wurth inductor) are RoHS-compliant and lead-free per MPS green status documentation. Board finish is ENIG, and solder mask conforms to IPC-4101D/126 standards.

How is thermal performance validated on this board?

Thermal validation was performed per MP2225 datasheet test conditions: 12V input, 3.3V/5A output, 200LFM airflow, and ambient 25°C. Measured junction temperature rise is <45°C above ambient, confirming safe operation within the TSOT23-8 package's 150°C max rating under full load.