Monolithic Power Systems Inc. EV4420A-J-00A

Overview

EV4420A-J-00A from Monolithic Power Systems is an evaluation board for the MPQ4420AGJ synchronous step-down converter, supporting 4–36V input, 3.3V/2A output, and TSOT23-8 packaged IC operation in automotive and industrial power supply designs.

For engineers reviewing the EV4420A-J-00A datasheet, EV4420A-J-00A pinout, EV4420A-J-00A application, or EV4420A-J-00A equivalent, this board enables rapid validation of MPQ4420AGJ's high-efficiency synchronous buck conversion, EN/SYNC control, Power Good signaling, and cold-crank duty-cycle capability under real load conditions.

Technical Context

The EV4420A-J-00A implements a fully assembled, tested reference design for the MPQ4420AGJ - a current-mode, 410kHz default switching frequency buck regulator with internal 90mΩ/55mΩ MOSFETs, forced CCM mode, and AEC-Q100 Grade 1 qualification.

It supports external clock synchronization (200kHz–2.2MHz), programmable output voltage via resistor divider (VFB = 0.792V), and integrated protections including over-current hiccup and thermal shutdown - all verified across 4–36V input range and up to 2A continuous load.

Key Specifications

Availability

EV4420A-J-00A is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial PLC I/O modules, and distributed DC-DC conversion requiring stable component supply and pre-validated layout compliance.

Supply support for EV4420A-J-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 global design centers and AEC-Q100-compliant product development infrastructure.

The EV4420A-J-00A belongs to MPS's automotive-grade evaluation board portfolio, designed to accelerate adoption of MPQ4420AGJ in safety-critical and thermally constrained 12V/24V systems.

FAQ

What IC does the EV4420A-J-00A evaluate?

The EV4420A-J-00A evaluates the MPQ4420AGJ - a 36V, 2A synchronous step-down converter in TSOT23-8 package, qualified to AEC-Q100 Grade 1, with integrated high- and low-side MOSFETs (90mΩ/55mΩ), 410kHz default switching frequency, and Power Good output.

Can the output voltage be adjusted?

Yes. The board ships with R4=20kΩ and R5=6.34kΩ to set 3.3V output (VFB=0.792V). To change VOUT, replace R5 using the formula R5 = R4 × 0.792 / (VOUT − 0.792); compensation, inductor, and capacitor values must be re-evaluated per the MPQ4420AGJ datasheet.

How is the EN/SYNC pin used on this board?

The EN/SYNC pin supports both enable/disable control (logic-high >1.65V turns on; <1.05V shuts down) and external clock synchronization (200kHz–2.2MHz). When floating, the internal 500kΩ pull-down disables the IC. External clock pulse width must remain below 1.7μs.

Does the board include thermal management features?

Yes. The board uses the MPQ4420AGJ's internal thermal shutdown protection and places the IC directly over a thermal pad connected to inner copper layers. Layout follows MPS-recommended thermal vias and copper pour guidelines for sustained 2A operation at elevated ambient temperatures.

Is the EV4420A-J-00A RoHS and halogen-free compliant?

Yes. All components on the EV4420A-J-00A - including the MPQ4420AGJ IC, ceramic capacitors (Murata, TDK), inductors (Coilcraft, TOKO), and resistors (Yageo) - are lead-free, halogen-free, and comply with the EU RoHS directive, as confirmed in the BOM and MPS green status documentation.