Monolithic Power Systems Inc. EV2393-TL-00A

Overview

EV2393-TL-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2393GTL synchronous step-down converter, delivering 3A continuous output at 3.3V from a 4.2–24V input, operating at 650kHz with internal 75mΩ/40mΩ MOSFETs and constant-on-time control for fast transient response. It supports pre-bias startup, power-good indication, and full protection including OCP, SCP, UVP, and thermal shutdown.

For engineers reviewing the EV2393-TL-00A datasheet, EV2393-TL-00A pinout, EV2393-TL-00A application, or EV2393-TL-00A equivalent, this board enables rapid validation of MP2393GTL performance in compact DC/DC designs requiring high efficiency (up to 95%), low quiescent current (200µA), and stable regulation across 19V input and 3.3V/3A output conditions.

Technical Context

The EV2393-TL-00A implements the MP2393GTL IC in a fully assembled, tested layout optimized for minimal external components: single 3.3µH shielded inductor (Wurth 744314330), eight ceramic capacitors (including 22µF X5R input/output banks), and precision feedback resistors (R1–R5) setting 3.3V output with ±1% accuracy. The board uses SOT583-packaged MP2393GTL with integrated high- and low-side MOSFETs, eliminating external switch requirements.

Constant-on-time (COT) control delivers sub-10µs load transient recovery (1.5A→3A step), while programmable soft-start (via C4 = 6.8nF) limits inrush current. Power-good (PG) is implemented with R8 (100kΩ pull-up) and active-low open-drain output referenced to VOUT.

Key Specifications

Availability

EV2393-TL-00A is available at Aetrix Electronics and suitable for game console power rails, digital set-top box DC/DC conversion, flat-panel TV auxiliary supplies, and other embedded applications requiring stable component supply, quick-turn prototyping, and production-ready reference design validation.

Supply support for EV2393-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 over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP2393 product line targets space-constrained, high-efficiency point-of-load applications in consumer electronics and computing, emphasizing integration (internal MOSFETs), fast transient response (COT control), and robust protection in ultra-small SOT583 packaging.

FAQ

What input voltage range is supported on the EV2393-TL-00A?

The board supports 4.2V to 24V DC input, validated per datasheet with stable 3.3V/3A output across 5V, 12V, 19V, and 24V sources. Input ripple is suppressed using dual 22µF X5R ceramics (C1, C2/C2A), and operation below 4.2V will disable regulation due to UVLO threshold.

How is the 3.3V output voltage set and trimmed?

Output voltage is set by the R1 (40.2kΩ) and R2 (13kΩ) resistor divider network on FB, yielding VOUT = 0.8V × (1 + R1/R2) = 3.3V. Tolerance is ±1% at room temperature and full load; no onboard trim pot is provided-accuracy relies on 1% thick-film resistor values and MP2393GTL's 0.8V reference tolerance.

Does the EV2393-TL-00A support enable and power-good functions?

Yes: EN is accessible via test point or JP1 pin 1; drive >1.3V to enable, <1V to disable. PG is routed to TP5 and requires external 3.3V pull-up (R8 = 100kΩ installed) to indicate regulated output. PG asserts high after soft-start completes and deasserts during faults or shutdown.

What inductor is used, and can it be substituted?

The board uses Wurth 744314330: 3.3µH, 9mΩ DCR, 9A saturation current. Substitution requires matching inductance (±10%), DCR ≤12mΩ, Isat ≥9A, and shielded construction to maintain EMI performance and thermal behavior. Non-shielded or higher-DCR parts degrade efficiency and thermal margin.

Is pre-bias startup supported, and how is it verified?

Yes-the MP2393GTL supports pre-bias startup, confirmed on EV2393-TL-00A via test waveforms showing clean VOUT ramp from 0V with 3.3V pre-biased output capacitor. Startup occurs without output voltage reversal or excessive inrush, enabled by internal current-limiting and gate-drive sequencing.

What are the physical dimensions and mounting features?

The board measures 63.7mm × 48.4mm × 6.4mm (L×W×H) with four 3.2mm-diameter mounting holes (M3 compatible) located at corners. PCB stack-up is 2-layer FR-4 with thermal vias under U1 and power planes optimized for low-impedance VIN/VOUT routing and MOSFET thermal dissipation.