Monolithic Power Systems Inc. EVQ4487-U-00A

Overview

EVQ4487-U-00A from Monolithic Power Systems is an AEC-Q100 qualified evaluation board for the MPQ4487 dual-port USB power converter IC, integrating a 6V–36V input synchronous buck regulator with two independent 5.17V/3A USB Type-C DFP-mode switches and channel configuration logic. It delivers up to 6A total output current with hiccup current limiting, output overvoltage protection, and thermal shutdown. Used for automotive cigarette lighter adapters and USB hub reference validation.

For engineers reviewing the EVQ4487-U-00A datasheet, EVQ4487-U-00A pinout, EVQ4487-U-00A application, or EVQ4487-U-00A equivalent, this board enables rapid validation of MPQ4487's dual USB Type-C 5V@3A DFP operation, programmable switching frequency (450 kHz), line-drop compensation (90 mV), and load-shedding versus temperature behavior under real automotive input conditions (12 V nominal, 6–36 V range).

Technical Context

The EVQ4487-U-00A implements the MPQ4487 IC in a four-layer, 2 oz copper PCB layout optimized for thermal performance and EMI control. It supports both USB Type-C 5V@3A DFP mode (with CC logic via CN1 header) and configurable USB Type-A [email protected] mode via resistor/capacitor rework.

Board-level protections include hiccup-mode current limiting on both buck and USB power paths, output OVP at 5.17 V ±1%, and thermal shutdown triggered by internal die temperature. Input voltage range (6–36 V) and 450 kHz fixed-frequency operation are validated per Rev. 1.1 schematic and BOM.

Key Specifications

Availability

EVQ4487-U-00A is available at Aetrix Electronics and suitable for automotive cigarette lighter adapters, USB hub reference designs, and linear charger power supply validation requiring stable component supply and AEC-Q100-aligned test platforms.

Supply support for EVQ4487-U-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The EVQ4487-U-00A belongs to MPS's automotive-grade evaluation board product line, developed specifically to accelerate design-in of MPQ4487 in AEC-Q100-compliant in-vehicle USB charging systems with dual Type-C DFP capability.

FAQ

What is the primary purpose of the EVQ4487-U-00A?

The EVQ4487-U-00A is a fully assembled, tested evaluation board for the MPQ4487 IC. It enables engineers to validate dual USB Type-C 5V@3A DFP operation, buck regulation stability, protection responses, and layout practices before committing to custom PCB design.

Does the board support USB Type-A output?

Yes - by modifying resistors (R7/R8 to 80.6 kΩ), removing capacitors C7/C8, and jumpering specific CN1 pins, the board can be reconfigured for USB Type-A [email protected] mode per the Quick Start Guide.

How is USB Type-C channel configuration implemented?

Channel configuration uses the CN1 14-pin header: shorting pins 1–3 enables USB1 VBUS, pins 11–13 enables USB2 VBUS, pins 2–4 enables VCONN1, and pins 12–14 enables VCONN2 - all without external controller intervention.

What input voltage must be applied to start the board?

A stable DC supply between 6 V and 36 V must be connected to VIN and GND. The board auto-starts when powered, but USB VBUS outputs remain inactive until a Type-C device is attached - or jumpers are applied to CN1 to force enablement.

Are the USB output voltages adjustable?

Yes - the MPQ4487 IC supports selectable output voltages (5.10 V, 5.17 V, 5.30 V) via external resistor dividers. The EVQ4487-U-00A is configured for 5.17 V as shipped, matching the USB PD 5 V standard tolerance.

Is thermal performance characterized on this board?

Yes - thermal shutdown is implemented via the MPQ4487's internal sensor and verified in the datasheet's typical performance curves. The four-layer 2 oz copper PCB layout provides measured thermal resistance consistent with AEC-Q100 ambient operating requirements.