Monolithic Power Systems Inc. EVQ4214-U-00A

Overview

EVQ4214-U-00A from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified evaluation board designed to demonstrate the MPQ4214GU-AEC1 synchronous four-switch buck-boost controller. It supports 6–40V input, programmable 5–40V output via I²C, up to 5A output current, and features valley-current control in buck mode and peak-current control in boost mode for smooth mode transitions - validated in USB PD, industrial PC, and wireless charging applications.

For engineers reviewing the EVQ4214-U-00A datasheet, EVQ4214-U-00A pinout, EVQ4214-U-00A application, or EVQ4214-U-00A equivalent, this board enables rapid validation of I²C-programmable VOUT slew rate, adjustable OCP via IPWM, FCCM operation, hiccup OCP, and auto-retry OVP under real-world load transients and line regulation conditions.

Technical Context

The EVQ4214-U-00A implements the MPQ4214GU-AEC1 IC in a fully assembled, tested layout with QFN-27 (5mm × 5mm) footprint, supporting 200/300/400/600kHz selectable switching frequency and integrated VOUT discharge. It uses four external N-channel MOSFETs (AON7264E), dual current-sense resistors (R3 = 10mΩ, R4 = 5mΩ), and a 4.7µH power inductor (XAL1010-472MED) to deliver up to 95% efficiency at 5A/5V output with VIN = 12V.

Board-level functions include I²C register access for real-time VOUT voltage (0.5–36V), reference voltage (0.3–2.047V in 1mV steps), slew rate selection, and constant-current limit (0.6A steps); IPWM pin enables fine OCP adjustment in <50mA steps; interrupt pin signals CC, OCP, OVP, and OTP events.

Key Specifications

Availability

EVQ4214-U-00A is available at Aetrix Electronics and suitable for USB Power Delivery implementation, industrial PC power supply validation, and wireless charging reference design requiring stable component supply and AEC-Q100-compliant evaluation hardware.

Supply support for EVQ4214-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 power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and battery management solutions.

The EVQ4214-U-00A belongs to MPS's automotive-qualified evaluation board product line, engineered specifically to accelerate design-in of AEC-Q100 Grade 1 buck-boost controllers in safety-critical and thermally demanding applications such as infotainment power rails and USB-C vehicle chargers.

FAQ

What is the primary function of the EVQ4214-U-00A?

The EVQ4214-U-00A is a fully assembled evaluation board for the MPQ4214GU-AEC1 synchronous four-switch buck-boost controller. It is not a controller itself but provides a validated platform to evaluate I²C-programmable output voltage, adjustable OCP via IPWM, transient response, efficiency, and thermal performance under real operating conditions.

Does the EVQ4214-U-00A include the MPQ4214GU-AEC1 IC?

Yes - the board integrates one MPQ4214GU-AEC1 IC in a QFN-27 (5mm × 5mm) package, along with all required external components including four AON7264E MOSFETs, current-sense resistors, power inductors, and input/output capacitors as specified in the official BOM.

Can the output voltage be changed without reprogramming the I²C interface?

No - the default 5V output is set by onboard resistor dividers (R1, R13, R17), but full flexibility requires I²C commands via the provided GUI software. The FB pin is internally connected to the MPQ4214GU-AEC1 and not accessible for analog feedback modification on this board.

What are the supported I²C address options?

The ADDR pin supports two I²C addresses: pulled high (default) sets address 0x6B; pulled low sets 0x6A. This allows daisy-chaining multiple EVQ4214-U-00A boards on the same bus when used in multi-rail test setups.

Is the board compatible with standard USB-C PD source negotiation?

No - the EVQ4214-U-00A implements only the power stage control (buck-boost regulation), not the USB PD communication protocol stack. It must be paired with a dedicated PD controller (e.g., MPS MPQ4272) to achieve full USB-C PD compliance.

What thermal performance data is available?

Case temperature rise vs. load is documented for VOUT = 5V/9V/15V/20V at 400kHz: at 5A, rise is ≤15°C for 5V output and ≤25°C for 20V output, measured on the MPQ4214GU-AEC1 die using IR imaging per Figure 7–10 in the official Rev. 1.2 report.

Does the board support forced continuous conduction mode (FCCM)?

Yes - FCCM is enabled via I²C register bit configuration. When active, it eliminates discontinuous conduction mode (DCM) at light loads, reducing output voltage ripple and improving transient response predictability - confirmed in steady-state waveforms (Fig. 25–27).