Monolithic Power Systems Inc. EVQ5073-G-00A

Overview

EVQ5073-G-00A from Monolithic Power Systems is an AEC-Q100-qualified evaluation board for the MPQ5073 2A programmable current-limit load switch, featuring 50mΩ R_DS(ON), 0.5V–5.5V input range, and adjustable current limit via external resistor on ILIM pin; used to validate power sequencing and overcurrent protection in portable SSD and tablet power rails.

For engineers reviewing the EVQ5073-G-00A datasheet, EVQ5073-G-00A pinout, EVQ5073-G-00A application, or EVQ5073-G-00A equivalent, this board enables rapid validation of MPQ5073's soft-start slew rate control, <200ns short-circuit response, power-good signaling, and output discharge functionality under real load conditions.

Technical Context

The EVQ5073-G-00A implements the MPQ5073GG QFN-12 (2mm×2mm) load switch IC with integrated 50mΩ FETs, supporting input voltages from 0.5V to 5.5V and delivering up to 2A continuous output current. It uses a sense-FET topology for accurate current limiting, where the ILIM pin sets threshold via external resistor (e.g., 13kΩ yields ~2.5A limit).

Board-level features include EN-controlled enable logic (2.6V high/0.4V low), SS pin for soft-start timing (via C4), PG pin for power-good status, and VCC bias supply routing. All decoupling uses X5R/X7R MLCCs (0603/0805), and thermal performance is validated per AEC-Q100 temperature cycling requirements.

Key Specifications

Availability

EVQ5073-G-00A is available at Aetrix Electronics and suitable for notebook power rail validation, SSD hot-swap testing, and handheld device battery path qualification requiring stable component supply and AEC-Q100-aligned reference designs.

Supply support for EVQ5073-G-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 focus on efficiency, integration, and reliability across consumer, automotive, and industrial markets.

The MPQ5073 product line delivers compact, thermally robust load switches for space-constrained portable systems-designed specifically for dynamic current limiting, fast fault recovery, and seamless integration into multi-rail power architectures.

FAQ

What is the purpose of the R1 resistor on the EVQ5073-G-00A board?

R1 (13kΩ) connects ILIM to GND and sets the output current limit to approximately 2.5A per the MPQ5073's sense-FET transfer function. Changing R1 value directly scales the trip threshold-lower resistance increases limit, higher resistance reduces it-enabling precise adaptation to system-level overcurrent requirements without firmware changes.

Does the EVQ5073-G-00A support input voltages below 3V?

Yes-the underlying MPQ5073 IC operates down to 0.5V input, and the EVQ5073-G-00A board maintains functionality at 0.5V–3V, though tested performance data (e.g., 2A delivery, PG assertion) is specified from 3V. Below 3V, output current capability decreases due to R_DS(ON) rise and gate drive margin reduction.

How is short-circuit protection verified on this evaluation board?

SCP response is validated using oscilloscope waveforms captured during forced output short events: VIN=5V, VCC=3.6V, RLIM=13kΩ. Measurements confirm <200ns detection-to-shutdown latency, with clean current foldback and automatic recovery after fault removal-demonstrating robustness for USB-C and PCIe slot applications.

Can the EVQ5073-G-00A be used for AEC-Q100 compliance testing?

Yes-the board hosts the AEC-Q100 Grade 1 qualified MPQ5073GG IC and follows layout practices aligned with automotive thermal and EMI requirements. While the board itself is not certified, it provides the necessary hardware platform to execute required temperature cycling, HTOL, and transient immunity tests per AEC-Q100 Rev H for system-level qualification.

What role does capacitor C4 play in the EVQ5073-G-00A design?

C4 (0.1µF) connects to the SS (soft-start) pin and controls the output voltage ramp rate during turn-on. Its value sets the slew time constant in conjunction with internal SS current source; increasing C4 slows V_OUT rise to prevent inrush current spikes in downstream capacitive loads such as SSD power domains or display bias rails.

Is the PG (Power Good) signal actively driven or open-drain?

The PG pin is an active-pullup/open-drain output: it drives high (to V_IN) when V_OUT reaches ≥90% of V_IN within the soft-start period, and pulls low (to GND) during fault or startup delay. External pull-up is unnecessary-board schematic shows direct connection to V_IN through R2 (100kΩ), confirming active-high default behavior.