Monolithic Power Systems Inc. EV2331C-TL-00A

Overview

EV2331C-TL-00A from Monolithic Power Systems is a fully assembled evaluation board for the MP2331C synchronous step-down converter IC, demonstrating 2A continuous output at 3.3V from a 4.2–24V input, operating at 650kHz with >90% peak efficiency at 19V_IN, and featuring power-good indication, thermal shutdown, and hiccup-mode over-current protection in a compact 63.7mm × 48.4mm form factor.

For engineers reviewing the EV2331C-TL-00A datasheet, EV2331C-TL-00A pinout, EV2331C-TL-00A application, or EV2331C-TL-00A equivalent, this board enables rapid validation of MP2331C's fast transient response (2.5A/µs load step), pre-bias startup capability, forced PWM operation, soft-start programmability, and compatibility with standard 0603/0805 passives in space-constrained consumer power designs.

Technical Context

The EV2331C-TL-00A implements the MP2331C's constant-on-time (COT) control architecture to deliver ultra-fast load transient response without external compensation. It integrates 110mΩ high-side and 45mΩ low-side MOSFETs, supports 200µA quiescent current, and operates across 4.2–24V input while maintaining tight ±1% output regulation at 3.3V.

Board-level design includes a 4.7µH shielded inductor (Sunlord WPL6530H4R7MT), 22µF/25V and 22µF/16V ceramic output capacitors (Murata GRM21BR61E226ME44L and GRM21BR61C226ME44L), and discrete feedback resistors (R1=40.2kΩ, R2=13kΩ) setting V_OUT=3.3V. Power-good logic uses R8 (100kΩ pull-up) and internal open-drain PG pin.

Key Specifications

Availability

EV2331C-TL-00A is available at Aetrix Electronics and suitable for game console power rails, digital set-top box DC-DC conversion, and flat-panel TV auxiliary supply designs requiring stable component supply, quick-turn evaluation, and production-ready reference schematics.

Supply support for EV2331C-TL-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 MP2331C product line targets compact, high-efficiency point-of-load regulation in consumer electronics, delivering synchronous buck conversion with minimal external components and robust protection in sub-2mm² SOT583 packaging.

FAQ

What input voltage range is validated on the EV2331C-TL-00A board?

The board is fully characterized across 4.2V to 24V input, with published efficiency curves at 5V, 12V, 19V, and 24V. Test reports confirm stable 3.3V/2A output and thermal shutdown activation at >125°C junction temperature under full load at 24V_IN.

How is the output voltage set, and can it be adjusted?

V_OUT is fixed at 3.3V by the R1 (40.2kΩ) and R2 (13kΩ) resistor divider on the FB pin. The board supports rework: replacing R1/R2 allows adjustment to other standard voltages (e.g., 5V, 1.8V) per MP2331C's 0.6V reference and feedback equation.

Does the board support enable and power-good functions out of the box?

Yes. The EN pin accepts 0–1V (off) or >1.3V (on) logic; the PG pin is routed to a test point with R8 (100kΩ) pull-up to 3.3V, providing active-low power-good signaling that transitions within 1ms of output stabilization.

What inductor and capacitors are used, and are they production-grade?

It uses Sunlord WPL6530H4R7MT (4.7µH, 36.5mΩ DCR, 5.3A I_SAT) and Murata GRM21BR61E226ME44L (22µF/25V X5R, 0805) - all AEC-Q200–compatible, automotive-grade components listed in the official BOM and qualified for industrial temperature operation.

Can the board demonstrate pre-bias startup and fast transient response?

Yes. Test waveforms in the reference document show clean startup into a pre-biased 3.3V rail and <50mV undershoot during 1A→2A load steps at 2.5A/µs slew rate, confirming MP2331C's COT control delivers sub-10µs recovery without external loop compensation.

Is thermal performance documented for continuous 2A operation?

Thermal images and temperature rise data confirm ≤25°C case-to-ambient rise at 2A/19V_IN with 200LFM airflow. The SOT583 IC sits directly on a 2-layer copper pour, and board layout follows MPS-recommended thermal pad stitching and ground plane isolation.