Monolithic Power Systems Inc. EVQ4263-QVE-00A

Overview

EVQ4263-QVE-00A from Monolithic Power Systems is an AEC-Q100 qualified evaluation board for the MPQ4263 buck-boost DC/DC converter IC, featuring two integrated low-side MOSFETs, high-side current sensing, and I²C programmability. It delivers up to 140W peak output (28V/5A) across a 3.6V–36V input range, supports forced PWM and PFM/PWM auto-mode, and targets USB PD power stage validation.

For engineers reviewing the EVQ4263-QVE-00A datasheet, EVQ4263-QVE-00A pinout, EVQ4263-QVE-00A application, or EVQ4263-QVE-00A equivalent, this board enables rapid characterization of MPQ4263 register-controlled VOUT, current limit, OVP, slew rate, and thermal behavior under real load conditions with VIN = 3.6–36V and VOUT = 3.3–28V.

Technical Context

The EVQ4263-QVE-00A implements the MPQ4263GQVE-0000-AEC1 in QFN-20 (3mm × 5mm) packaging with external 4.7µH power inductor (PIAQ1005S4R7MN), 5mΩ current-sense resistor (RL3720WT-R005-F), and dual 2.2µH EMI filter chokes (MPL-AL5030-2R2). It uses a 420kHz fixed-frequency buck-boost topology with valley-current and peak-current limiting.

Board-level I²C interface (SCL/SDA pins) connects to EVKT-USBI2C-02 for real-time register read/write via Virtual Bench Pro 4.0. Over-temperature protection triggers shutdown at 160°C die temperature, with automatic recovery at 140°C. Output discharge and line-drop compensation are enabled by default.

Key Specifications

Availability

EVQ4263-QVE-00A is available at Aetrix Electronics and suitable for USB PD power delivery validation, automotive infotainment power rail testing, and industrial 24V-to-12V/5V/3.3V buck-boost prototyping requiring stable component supply and AEC-Q100-compliant reference designs.

Supply support for EVQ4263-QVE-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 power management ICs, with design centers in the US, China, and Taiwan, and global distribution through authorized partners.

The EVQ4263-QVE-00A belongs to MPS's automotive-grade evaluation platform family, engineered to accelerate qualification of MPQ4263-based power stages in safety-critical vehicle subsystems including ADAS cameras, telematics gateways, and USB-C charging modules.

FAQ

What is the maximum supported output voltage on EVQ4263-QVE-00A?

The board supports up to 28V output when VIN exceeds 19V, as confirmed in the performance summary. The default feedback network sets VOUT = 5V, but resistor dividers can be modified to achieve 3.3V–28V. Output over-voltage protection is factory-set to 38.5V absolute threshold.

Does EVQ4263-QVE-00A include the MPQ4263 IC pre-soldered?

Yes - U1 is the MPQ4263GQVE-0000-AEC1 in QFN-20 (3mm × 5mm) package, fully assembled and tested. The IC integrates two low-side N-channel MOSFETs, high-side current sense amplifier, I²C interface, and thermal shutdown circuitry.

Can the board operate in standalone mode without I²C communication?

Yes - the MPQ4263 defaults to forced PWM mode with VOUT = 5V, 5.4A current limit, and OVP enabled. I²C is optional for dynamic reconfiguration; EN pin control and analog feedback remain fully functional without host connection.

Which inductors are recommended for high-efficiency operation?

MPS recommends the MPL-AL5030-2R2 (2.2µH, 12.3mΩ DCR, 11A ISAT) for EMI filtering and the PIAQ1005S4R7MN (4.7µH, 8mΩ DCR, 13A ISAT) as the main power inductor. Both are optimized for 420kHz switching and validated in the board's thermal rise curves.

Is the board compliant with automotive EMC standards?

The EVQ4263-QVE-00A layout incorporates split ground planes, shielded EMI chokes, and optimized routing per MPS's CISPR 25 Class 5 guidelines. Full compliance requires enclosure integration and system-level testing, but the board serves as a certified reference for AEC-Q100 power stage design.

How is over-current protection implemented?

Over-current protection uses high-side current sensing via R10 (5mΩ) and internal valley/peak current limits: SWB valley = 9A and SWC peak = 12A (default register settings). The current limit can be adjusted down to 5.4A or up to 7A by modifying RSENS configuration bits and resistor value.