Monolithic Power Systems Inc. EV2457-T-00A

Overview

EV2457-T-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2457GJ synchronous step-down converter-a 36V-input, 0.6A-output, 2MHz fixed-frequency DC/DC regulator in TSOT23-6 packaging-optimized for power meter applications with low dropout mode, 65μA operating quiescent current, and internal MOSFETs (400mΩ high-side / 200mΩ low-side).

For engineers reviewing the EV2457-T-00A datasheet, EV2457-T-00A pinout, EV2457-T-00A application, or EV2457-T-00A equivalent, this board enables rapid validation of MP2457GJ performance under 5–36V input, 12V/0.6A output, thermal shutdown, frequency fold-back, and EN-controlled startup/shutdown in industrial and battery-powered metering systems.

Technical Context

The EV2457-T-00A implements the MP2457GJ IC in a fully assembled, tested 63.5mm × 63.5mm PCB layout with 22μH shielded inductor (Wurth 74404084220), input/output ceramic and electrolytic capacitors, and precision feedback resistors. It supports direct VIN (5–36V) and EN control, delivering regulated 12V output at up to 0.6A with >90% peak efficiency at 24V input.

Test results confirm fast transient response (10mA ↔ 0.6A load steps), short-circuit protection with recovery, soft-start behavior, and stable operation across industrial temperature range. The board includes dedicated test points for VOUT ripple (≤10mV AC-coupled), switch-node (VSW), enable (VEN), and inductor current (IL) measurement.

Key Specifications

Availability

EV2457-T-00A is available at Aetrix Electronics and suitable for power meter design validation, industrial DC/DC subsystem testing, and battery-powered embedded system development requiring stable component supply and verified reference performance.

Supply support for EV2457-T-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, motor drivers, and LED lighting controllers.

The MP2457 product line targets high-voltage, low-quiescent-current power metering applications, emphasizing reliability under wide input ranges, minimal external components, and guaranteed industrial temperature operation (–40°C to +125°C).

FAQ

What input voltage range does the EV2457-T-00A support?

The board supports 5V to 36V DC input, matching the MP2457GJ's operational range. It has been validated at 13V, 24V, and 36V with consistent 12V output regulation and >90% efficiency at mid-load. Input capacitors (C1/C2: 4.7μF/50V X5R) and layout are optimized for stability across this full range.

Can the output voltage be adjusted?

Yes-the output is set to 12V by default using R4 (24.9kΩ) and R5 (100kΩ) in the feedback divider, but it can be reconfigured by replacing these resistors. The MP2457GJ uses an internal 0.8V reference, so VOUT = 0.8V × (1 + R4/R5); changing R4 or R5 alters the regulated output voltage.

Does the board include short-circuit protection demonstration?

Yes-test waveforms in the user guide show SCP entry, steady-state short-circuit limiting, and automatic recovery when the short is removed. The MP2457GJ implements cycle-by-cycle current limit and frequency fold-back to prevent inductor saturation and thermal runaway during faults.

How is enable functionality implemented on this board?

The EN pin (U1 Pin 5) is accessible via test point TP3. Driving it above 2V enables regulation; pulling below 1.3V disables output. The board includes no pull-up/pull-down, allowing direct microcontroller GPIO or logic-level control without additional circuitry.

What inductor is used, and why was it selected?

The board uses Wurth 74404084220: a 22μH, shielded SMD inductor rated for 2.6A saturation current and 69mΩ DCR. Its value and current rating ensure stable 2MHz operation with margin for 0.6A continuous output and transient peaks, while minimizing size and EMI.

Is thermal performance characterized on this board?

Yes-thermal shutdown is active and verified. At 24V input and 0.6A load, the MP2457GJ junction temperature remains within limits due to the TSOT23-6 package's thermal pad connection to the PCB copper pour. Board layout includes thermal vias under U1 to enhance heat dissipation.