Monolithic Power Systems Inc. EVQ2241-D-00A

Overview

EVQ2241-D-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MPQ2241 AEC-Q100 Grade 1 synchronous buck converter, supporting input voltage range of 2.7V–6V, configurable switching frequency (300kHz–2.2MHz), and up to 1A continuous output current at 1.8V with 93.1% typical efficiency. It demonstrates advanced asynchronous modulation (AAM) and forced continuous conduction mode (FCCM) operation in automotive infotainment and telematics power rails.

For engineers reviewing the EVQ2241-D-00A datasheet, EVQ2241-D-00A pinout, EVQ2241-D-00A application, or EVQ2241-D-00A equivalent, this board enables rapid validation of MPQ2241's transient response, thermal performance, power-good signaling, and AEC-Q100-compliant DC/DC design under real load conditions including 0–1A step changes and short-circuit recovery.

Technical Context

The EVQ2241-D-00A implements the MPQ2241 IC in QFN-9 (2mm×3mm) packaging with integrated high-side MOSFET and synchronous rectifier, eliminating external Schottky diodes. It supports dual operating modes: AAM for light-load efficiency optimization and FCCM for fixed-frequency, low-ripple regulation.

Board-level features include adjustable output voltage via external resistor divider (R3/R4/R5), programmable switching frequency using RFREQ (4.7nF C4 + 9.31kΩ R7), EN-controlled startup/shutdown, and PG signal monitoring with ±15% VOUT window detection. Protection functions-OCP (valley-current sensing), SCP, OVP, and thermal shutdown with auto-recovery-are fully exercised on this board.

Key Specifications

Availability

EVQ2241-D-00A is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and telematics control units requiring stable component supply and AEC-Q100-qualified reference designs.

Supply support for EVQ2241-D-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 core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and consumer applications.

The MPQ2241 product line delivers AEC-Q100 Grade 1 synchronous buck regulators targeting space-constrained, thermally demanding automotive subsystems where reliability, efficiency, and EMI control are critical.

FAQ

What input voltage range does the EVQ2241-D-00A support?

The board operates with a 2.7V to 6V input voltage range, aligned with automotive battery nominal (12V system with drop to 6V cold-crank) and portable instrument supply requirements. Input capacitors (C1A/C1D/C1B) are rated for 16V and 50V respectively to ensure margin during transients.

How is output voltage adjusted on this evaluation board?

VOUT is set by a three-resistor feedback network (R3=10Ω, R4=100kΩ, R5=49.9kΩ) that references the MPQ2241's 0.606V internal FB threshold. Equation VOUT = 0.606V × (1 + R4/R5 + R3/R5) yields 1.8V; R5 values for other outputs (1.2V–3.3V) are tabulated in the schematic.

Does the board demonstrate both AAM and FCCM modes?

Yes - jumpers and test points (MODE pin, labeled "AAM/FCCM") allow direct selection between Advanced Asynchronous Modulation (for peak efficiency at light loads) and Forced Continuous Conduction Mode (for fixed fSW and reduced output ripple). Both modes are characterized in efficiency, power loss, and thermal curves.

What protection features are validated on the EVQ2241-D-00A?

All MPQ2241 protections are exercised: over-current (valley-current detection), short-circuit (SCP entry/recovery waveforms shown), over-voltage (OVP clamping), and thermal shutdown with automatic recovery. PG signal behavior during startup, shutdown, and fault conditions is also captured in oscilloscope plots.

Is the MPQ2241 IC on this board AEC-Q100 qualified?

Yes - the U1 device is MPQ2241GDE-AEC1, packaged in QFN-9 (2mm×3mm), qualified per AEC-Q100 Grade 1 (−40°C to +125°C ambient), and used in automotive infotainment, cluster, and telematics applications as stated in the official MPS documentation.

Can the switching frequency be modified, and how?

Yes - fSW is set via an external resistor (R7 = 9.31kΩ) connected to the FREQ/SYNC pin, with C4 = 4.7nF. The board includes a plot of fSW vs. RFREQ (0–2500kHz over 0–100kΩ), enabling precise frequency tuning for EMI compliance or efficiency optimization.

What load transient performance is demonstrated?

The board validates load-step response from 0A to 1A at 1.6A/µs under AAM mode, showing <±15mV VOUT deviation and full recovery within 20µs - confirming MPQ2241's peak-current-mode control loop stability and fast transient capability for processor core rails.