Monolithic Power Systems Inc. EVQ5077A-G-01A

Overview

EVQ5077A-G-01A from Monolithic Power Systems is an evaluation board for the MPQ5077A AEC-Q100 Grade 1 configurable-current load switch, supporting 1.2V–5.5V input, 7A continuous output, and external current-limit programming via ILIM pin resistor. It integrates soft-start control (C4), power-good monitoring (PG), enable logic (EN), and VIN/VOUT sensing for automotive infotainment, instrument clusters, and ADAS subsystems.

For engineers reviewing the EVQ5077A-G-01A datasheet, EVQ5077A-G-01A pinout, EVQ5077A-G-01A application, or EVQ5077A-G-01A equivalent, this board enables rapid validation of MPQ5077A's low-R_DS(ON) performance, thermal behavior under 7A load, current-limit accuracy across temperature, and PG/EN timing in automotive-grade 125°C ambient conditions.

Technical Context

The EVQ5077A-G-01A implements a full-function test platform for the MPQ5077A QFN-13 (2.5mm × 3mm) load switch IC, featuring dual-supply support (VIN = 1.2V–5.5V, VCC = 3V–5.5V), programmable current limit (via R1), and soft-start time adjustment (via C4). Its layout includes dedicated high-current VIN/VOUT pads, Kelvin-sense traces for VIN_SENSE/VOUT_SENSE, and isolated signal routing for EN, ILIM, and PG.

Board-level functionality mirrors production use cases: EN threshold is 2.6V (ON) / 0.4V (OFF); PG asserts after 100–200 µs delay upon valid VOUT; UVLO triggers at ~1.05V rising/falling; and current-sense ratio remains stable at ~70,000:1 across VCC and VIN ranges - enabling precise fault detection in safety-critical systems.

Key Specifications

Availability

EVQ5077A-G-01A is available at Aetrix Electronics and suitable for automotive infotainment head units, digital instrument clusters, and ADAS camera modules requiring stable component supply, AEC-Q100-compliant validation tools, and fast-turn evaluation hardware.

Supply support for EVQ5077A-G-01A 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 manufacturing partnerships.

The MPQ5077A product line targets automotive-grade power distribution - delivering robust, space-efficient load switching with precision current limiting, thermal protection, and functional safety features for ASIL-B–capable systems.

FAQ

What is the purpose of the R2 jumper on the EVQ5077A-G-01A board?

R2 (200Ω) provides VCC bias when VIN ≥ 3V. For VIN < 3V operation, R2 must be removed and a separate 3V–5.5V VCC supply applied - enabling full-range testing down to 1.2V VIN while maintaining proper gate drive and internal regulator operation.

How is current limit set and verified on this evaluation board?

Current limit is set by R1 (10.7kΩ default) connected between ILIM and GND. The MPQ5077A uses a sensing FET to generate a proportional voltage at ILIM; measured ILIM voltage and known R1 value determine actual I_LIMIT. Test data confirms ±5% accuracy from –40°C to +125°C.

Does the board support dual-supply configuration for extended VIN range?

Yes - when VIN is 1.2V–2.9V, the board requires two supplies: one for VIN and a separate 3V–5.5V source for VCC. Figure 2 in the reference guide shows R2 removal and VCC connection points, allowing full 1.2V–5.5V input validation with stable internal regulation.

What thermal performance can be expected during 7A continuous operation?

At TA = 25°C and VIN = VCC = 3.6V, the MPQ5077A on this board reaches ~75°C junction temperature under 7A load. R_DS(ON) increases only ~15% from 25°C to 125°C, and thermal shutdown activates above 150°C - verified via IR imaging and PG deassertion timing.

Can the PG signal be used for system-level fault handling?

Yes - PG is an open-drain output that asserts high after VOUT stabilizes within 1% of target and remains valid for undervoltage, overcurrent, or thermal faults. Its 100–200 µs delay and clean rise/fall times support direct connection to microcontroller interrupt pins for real-time fault response.

Is the board compatible with standard oscilloscope probing and automated test equipment?

Yes - all critical signals (VIN, VOUT, EN, ILIM, PG, VCC) are routed to 1mm pitch test points with labeled silkscreen; high-current paths use 2mm power terminals. Schematic (Figure 3) and layout files (Figures 4–5) are provided for probe placement and fixture design.