Monolithic Power Systems Inc. EV2325-J-00A

Overview

EV2325-J-00A from Monolithic Power Systems is a fully assembled evaluation board demonstrating the MP2325GJ synchronous step-down converter, configured for 3.3V/3A output from 4.5–24V input, operating at fixed 500kHz switching frequency with integrated 90mΩ/40mΩ MOSFETs and power-good indicator.

For engineers reviewing the EV2325-J-00A datasheet, EV2325-J-00A pinout, EV2325-J-00A application, or EV2325-J-00A equivalent, this board enables rapid validation of MP2325-based 3.3V power rails in space-constrained systems requiring high efficiency, thermal robustness, and external frequency synchronization capability.

Technical Context

The EV2325-J-00A implements the MP2325GJ IC in a fixed-output 3.3V configuration using external feedback resistors (R1=40.2kΩ, R2=13kΩ), supporting input voltages from 4.5V to 24V and delivering up to 3A continuous load current with synchronous rectification and current-mode control.

It integrates soft-start (via internal 1ms ramp), hiccup-mode over-current protection, thermal shutdown, and dual-function EN/SYNC pin enabling both enable control (1.4V turn-on threshold) and external clock synchronization (200kHz–2MHz range).

Key Specifications

Availability

EV2325-J-00A is available at Aetrix Electronics and suitable for notebook I/O power, flat-panel display bias supplies, digital set-top box SoC rails, and other embedded applications requiring stable component supply and fast design validation.

Supply support for EV2325-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 design centers across Asia and North America and global manufacturing partnerships.

The MP2325 product line targets compact, high-efficiency DC-DC conversion in portable and space-constrained electronics, emphasizing integration, thermal resilience, and ease of layout for 3A-class buck regulators.

FAQ

What input voltage range does the EV2325-J-00A support?

The board supports 4.5V to 24V DC input, matching the MP2325GJ's operational range. It has been tested with 12V input per the reference test conditions, and maintains regulation and thermal stability across the full range when used with appropriate input capacitance and PCB copper area.

Can the output voltage be adjusted, and how?

Yes - the board is shipped with 3.3V output, but the MP2325GJ supports adjustable outputs from 0.8V using external resistor dividers. To change VOUT, replace R1 (40.2kΩ) and R2 (13kΩ) with values calculated per the formula VOUT = 0.8V × (1 + R1/R2), maintaining total resistance between 100kΩ and 500kΩ for accuracy.

How is the EN/SYNC pin used on this evaluation board?

The EN/SYNC pin serves dual functions: applying >1.4V enables the regulator; <1.25V disables it. Applying an external clock signal (200kHz–2MHz) synchronizes switching frequency. No external pull-up is required - the board includes a 10Ω series resistor (R10) for clean signal coupling and noise immunity.

What thermal performance can be expected during 3A operation?

At 12V input and 3.3V/3A output, the MP2325GJ junction temperature remains below 95°C with standard 2oz copper on 4-layer PCB and no forced airflow, per Rev.1.0 test data. Thermal shutdown activates above 150°C, and the board layout prioritizes thermal vias under the TSOT23-8 package pad.

Does the board include input and output filtering components?

Yes - it includes 0.1μF + 22μF ceramic input capacitance (C1/C1A), 2×22μF output capacitance (C2/C2A), 0.1μF high-frequency bypass caps (C4/C6), and a 15pF compensation capacitor (C3). All are X7R/X5R dielectrics in 0603/0805/1206 packages, optimized for low ESR and stability.

Is the EV2325-J-00A RoHS-compliant and lead-free?

Yes - all components on the board, including the MP2325GJ IC, are lead-free and comply with the RoHS directive. MPS confirms green status for this part family on its Quality Assurance portal, and the board uses only Class 2 moisture-sensitive components rated for standard SMT reflow profiles.