Monolithic Power Systems Inc. EV4420H-J-01A

Overview

EV4420H-J-01A from Monolithic Power Systems is an evaluation board for the MPQ4420HGJ synchronous step-down converter, supporting 4–36V input, 3.3V/2A regulated output, and TSOT23-8 packaged IC operation in automotive and industrial power systems.

For engineers reviewing the EV4420H-J-01A datasheet, EV4420H-J-01A pinout, EV4420H-J-01A application, or EV4420H-J-01A equivalent, this board enables rapid validation of MPQ4420HGJ's high-efficiency synchronous buck conversion, thermal shutdown, power-good signaling, and external clock synchronization up to 2.2MHz.

Technical Context

The EV4420H-J-01A implements a complete reference design for the MPQ4420HGJ - a current-mode, 410kHz default switching frequency buck regulator with integrated 90mΩ/55mΩ MOSFETs, internal soft-start, and power-good (PG) output. It supports automotive cold-crank operation via high duty cycle capability.

Board-level features include full protection (OCP with hiccup mode, thermal shutdown), external clock synchronization (200kHz–2.2MHz), and power-save mode for light-load efficiency. Input filtering uses 22μF + 10μF + 47nF + 1nF ceramic capacitors; output employs dual 22μF X7S ceramics and a 4.7μH shielded inductor.

Key Specifications

Availability

EV4420H-J-01A 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 fast design validation.

Supply support for EV4420H-J-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 analog and power ICs, with core expertise in DC-DC conversion, motor drivers, and LED lighting controllers.

The MPQ4420H product line delivers AEC-Q100 Grade 1 qualified synchronous buck regulators for automotive and harsh-environment applications, emphasizing high efficiency, small footprint, and robust protection under wide input transients.

FAQ

What input voltage range does the EV4420H-J-01A support?

The board supports 4V to 36V DC input, enabling operation across automotive battery conditions including cold-crank (down to ~4.5V) and load-dump transients. Input filtering includes 22μF, 10μF, 47nF, and 1nF ceramic capacitors to ensure stability and noise suppression.

How is the 3.3V output configured and verified?

Output voltage is fixed at 3.3V using R4=20kΩ and R5=6.34kΩ to set VFB=0.792V per the MPQ4420HGJ datasheet. The configuration is validated on the fully assembled board with dual 22μF X7S output capacitors and tested per MPS Rev.1.0 test conditions (VIN=12V, TA=+25°C).

Can the EV4420H-J-01A be synchronized to an external clock?

Yes - the EN/SYNC pin accepts an external clock signal from 200kHz to 2.2MHz. The board's schematic connects this pin through a 1MΩ pull-down resistor (R1), allowing direct clock injection while maintaining compatibility with the IC's internal 410kHz oscillator when left floating.

Does the board provide power-good status indication?

Yes - the U1 MPQ4420HGJ IC includes an open-drain PG pin routed to the board's test point. It asserts high after output reaches regulation and soft-start completes, providing system-level power sequencing feedback without additional circuitry.

What protection features are implemented on the EV4420H-J-01A?

The board demonstrates all MPQ4420HGJ protections: over-current protection with hiccup-mode recovery, thermal shutdown with automatic restart, and internal soft-start. These are enabled by default and require no external configuration - verified during factory assembly and functional test.

Is the EV4420H-J-01A RoHS-compliant and AEC-Q100 qualified?

The board itself is RoHS-compliant (lead-free, halogen-free), and its core IC - MPQ4420HGJ - is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient). Component-level compliance is confirmed via MPS documentation and bill-of-materials sourcing from Murata, TDK, Yageo, and Coilcraft.