Monolithic Power Systems Inc. EVQ4316-R-01A

Overview

EVQ4316-R-01A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MPQ4316 AEC-Q100 qualified 45V, 6A synchronous step-down converter. It demonstrates high-efficiency DC/DC conversion with 3.3V fixed output, 410kHz switching frequency, 1.7μA shutdown quiescent current, and automotive-grade cold-crank and load-dump robustness.

For engineers reviewing the EVQ4316-R-01A datasheet, EVQ4316-R-01A pinout, EVQ4316-R-01A application, or EVQ4316-R-01A equivalent, this board enables rapid validation of MPQ4316 performance in AEC-Q100-compliant power systems-including input voltage range (3.3V–45V), efficiency curves (90.4% at 12V→3.3V/6A), SYNC/frequency configuration, and PG/EN control timing.

Technical Context

The EVQ4316-R-01A implements the MPQ4316 IC in QFN-20 (4mm×4mm) package with wettable flanks, supporting both AAM (Auto-Audio Mode) and FCCM (Forced Continuous Conduction Mode) operation. Its layout includes dual 47μF output capacitors, 4.7μH power inductor, and configurable feedback divider (R7/R8) for adjustable VOUT.

Key design features include SYNCIN/SYNCO pins for external clock synchronization (350–1000kHz), programmable switching frequency via R3 (75kΩ sets 410kHz), soft-start capacitor (C3 = 22nF → 1.63ms tSS), and thermal management via 2oz copper layers and optimized thermal pad routing to PGND/VIN planes.

Key Specifications

Availability

EVQ4316-R-01A is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment head units, and body electronics requiring stable component supply, AEC-Q100 validation support, and fast-turn evaluation of high-voltage buck regulators.

Supply support for EVQ4316-R-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 core expertise in DC/DC converters, motor drivers, and LED drivers for automotive, industrial, and computing markets.

The MPQ4316 product line targets automotive power systems requiring AEC-Q100 qualification, low IQ, wide VIN range, and robust EMI performance - designed specifically for front-end DC/DC conversion in 12V/24V/48V vehicle architectures.

FAQ

What input voltage range does the EVQ4316-R-01A support?

The board supports 3.3V to 45V input, validated across cold-crank (3.3V), nominal (12V/24V), and load-dump (up to 45V) conditions per ISO 16750-2. Input filtering includes CIN5 (47μF aluminum cap) and L1 (10mΩ ferrite bead) to suppress transients and meet CISPR25 Class 5 conducted emissions limits.

How is output voltage configured on this evaluation board?

VOUT is set by an external resistor divider (R7=100kΩ, R8=32.4kΩ) to deliver 3.3V as default. Equation (1) in the Quick Start Guide allows recalculating R8 for other outputs (e.g., 5V requires R8=19.1kΩ). The FB pin connects directly to the divider node; no solder jumpers or DIP switches are required for adjustment.

Does the EVQ4316-R-01A support external clock synchronization?

Yes - the SYNCIN pin accepts 350kHz to 1000kHz external clocks to synchronize switching edges, reducing EMI peaks in multi-rail systems. SYNCO provides a buffered copy of the internal oscillator for daisy-chaining. Test waveforms on page 17 confirm clean edge alignment at 350kHz and 1000kHz sync frequencies.

What protection features are demonstrated on this board?

The board validates MPQ4316's integrated protections: thermal shutdown (page 9 temperature rise plots), overcurrent hiccup mode (SCP entry/recovery waveforms on pages 15–16), input UVLO, and PG fault signaling. Cold-crank operation (VIN ramping from 3.3V to 5V at 6A) is shown on page 19 with stable VOUT regulation.

Can the EVQ4316-R-01A operate in forced continuous conduction mode (FCCM)?

Yes - FCCM is enabled by connecting JP1 pins 2–3 (MODE pin pulled high). Page 7–8 efficiency curves compare AAM vs FCCM across load ranges (0.1mA–6A) and input voltages (12V/24V/36V/45V), confirming FCCM maintains regulation under light loads where AAM would enter diode emulation.

Is the board RoHS and REACH compliant?

Yes - all BOM components listed on page 5 (e.g., Murata GRM series, TDK C1608, Yageo RC0603) are RoHS 2011/65/EU and REACH SVHC-compliant. MPS confirms MPQ4316GRE-AEC1 meets AEC-Q100 Grade 1 (−40°C to +125°C) and JESD22 reliability standards per Rev. 1.0 datasheet.