Monolithic Power Systems Inc. EVQ2451-G-33-00A

Overview

EVQ2451-G-33-00A from Monolithic Power Systems is an evaluation board for the MPQ2451-G-33 step-down DC/DC converter IC, featuring fixed 3.3V output, 2MHz switching frequency, 0.6A load capability, 6–32V input range, and integrated high-side MOSFET-designed for rapid validation of high-efficiency power delivery in space-constrained automotive and industrial systems.

For engineers reviewing the EVQ2451-G-33-00A datasheet, EVQ2451-G-33-00A pinout, EVQ2451-G-33-00A application, or EVQ2451-G-33-00A equivalent, this board enables fast functional verification of MPQ2451-based 3.3V power rails under real-world thermal and transient conditions with pre-validated layout, BOM, and test-point access to VIN, VOUT, EN, and GND.

Technical Context

The EVQ2451-G-33-00A implements current-mode control architecture for stable regulation across 0–0.6A loads and fast transient response. It integrates the MPQ2451-G-33 QFN-6 (2×2mm) IC with a 3.3μH power inductor, 10μF/22μF ceramic input/output capacitors, and B140 Schottky catch diode-optimized for minimal external component count and compact 4.6cm × 4.6cm footprint.

Soft-start prevents inrush current at startup; thermal shutdown ensures fault tolerance; and light-load frequency scaling improves efficiency across wide load ranges. The board supports enable/disable via TTL-compatible EN pin (1.6V turn-on threshold), with fixed 3.3V output requiring no feedback resistor network.

Key Specifications

Availability

EVQ2451-G-33-00A is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial PLC I/O modules, and battery-powered edge sensors requiring stable component supply, rapid design-in, and production-ready reference validation.

Supply support for EVQ2451-G-33-00A 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, LED drivers, and motor control solutions.

The MPQ2451 product line delivers compact, high-frequency buck regulators for space- and efficiency-critical applications-including automotive body electronics and industrial automation-where integrated MOSFETs and fixed-output variants reduce design complexity and bill-of-materials cost.

FAQ

What input voltage range does the EVQ2451-G-33-00A support?

The board accepts 6–32 V DC input, verified per MPS datasheet and test reports. This range accommodates common 12V and 24V automotive and industrial supplies while maintaining regulation and thermal stability up to 0.6A output current at full load.

Is the output voltage adjustable or fixed?

The output is fixed at 3.3 V, implemented by internal resistor divider within the MPQ2451-G-33 IC. No external feedback components are required or supported on this evaluation board-ensuring consistent 3.3V regulation without calibration or trimming.

How is the enable function controlled on this board?

The EN pin accepts TTL-level signals: drive ≥1.6 V to enable regulation; ≤1.2 V to disable. Floating EN defaults to off. Test points provide direct access for microcontroller GPIO or logic-level switches without additional buffering or pull-up components.

What is the maximum recommended output current and thermal performance?

The board delivers 0.6 A continuously at 25°C ambient with measured efficiency up to 90%. Thermal performance relies on the Wurth 3.3μH inductor (WE-744373240-33) and PCB copper area; derating is advised above 60°C ambient or with forced airflow limitations.

Does this evaluation board include input/output capacitors and EMI filtering?

Yes-it includes a 10μF/25V X5R input capacitor (Murata GRM21BR61E106KA73L), 22μF/6.3V X5R output capacitor (TDK C1608X5R0J226M080AC), and 0.1μF X7R bypass cap. No dedicated EMI filter stage is present; layout follows MPS-recommended high-frequency routing practices.

Can the EVQ2451-G-33-00A be used for production deployment?

No-it is strictly an evaluation board for design validation and characterization. For production, engineers must implement the MPQ2451-G-33 IC into their own layout using MPS's recommended thermal pad, grounding, and loop-area minimization guidelines from the datasheet.