Monolithic Power Systems Inc. EVQ8616-L-12-00A

Overview

EVQ8616-L-12-00A from Monolithic Power Systems is an evaluation board for the MPQ8616GL-12 monolithic synchronous step-down converter, delivering 12A continuous output at 1.2V from a 3V–6V input. It implements Constant-On-Time (COT) control, features programmable switching frequency (300kHz–1MHz), and supports pre-bias startup and remote enable/disable via ground-referenced EN pin. Used for validating high-current point-of-load regulation in telecom and server power systems.

For engineers reviewing the EVQ8616-L-12-00A datasheet, EVQ8616-L-12-00A pinout, EVQ8616-L-12-00A application, or EVQ8616-L-12-00A equivalent, this board enables rapid validation of MPQ8616GL-12 performance under real load transients, thermal stress, and input line variation - with measured efficiency up to 94% at 12A and VIN=5V.

Technical Context

The EVQ8616-L-12-00A implements a complete reference design for the MPQ8616GL-12, a 6V-input, 12A-output synchronous buck converter in QFN3x4 package. Its COT control architecture uses adaptive on-time modulation to maintain stable regulation across 0–12A loads without external compensation.

Board-level features include integrated 1μH power inductor (TOKO FDU1250C-1R0M), low-ESR 22μF ceramic output capacitors (Murata GRM32ER71C226KE18L), and precision feedback resistors (R1=29.4kΩ, R2=30.1kΩ) setting VOUT=1.2V with 1% reference accuracy over –20°C to +85°C junction temperature.

Key Specifications

Availability

EVQ8616-L-12-00A is available at Aetrix Electronics and suitable for telecom base station power validation, server VRM prototyping, and networking system PoL testing requiring stable component supply, full documentation access, and repeatable lab-grade measurement conditions.

Supply support for EVQ8616-L-12-00A 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 analog semiconductor company specializing in high-efficiency DC/DC converters, LED drivers, and motor drivers for power management applications.

The MPQ8616GL-12 product line targets high-current, space-constrained point-of-load regulation in datacenter and communications infrastructure, emphasizing ultrafast transient response and thermal robustness in compact QFN packages.

FAQ

What input voltage range is supported by the EVQ8616-L-12-00A?

The board accepts 3V to 6V DC input, validated across this full range with stable 1.2V output regulation and efficiency >88% at 12A under worst-case VIN=3.3V. Input must be well-decoupled; damping capacitor recommended for cables >0.5m.

How is output voltage set, and can it be adjusted?

VOUT is set to 1.2V by factory-installed R1 (29.4kΩ) and R2 (30.1kΩ) forming a resistor divider referenced to the 0.6V internal feedback node. Output voltage can be reconfigured per the MPQ8616GL-12 datasheet using different R1/R2 values, with attention to stability and transient performance.

Does the board support remote enable/disable functionality?

Yes - the EN pin is brought out to a test point and accepts ground-referenced logic signals: drive >2V to enable, <0.4V to disable. The function supports pre-bias startup and is compatible with standard 1.8V/3.3V/5V logic families.

What protection features are implemented and verified on this board?

The board demonstrates non-latch overcurrent protection (OCP), non-latch overvoltage protection (OVP), and thermal shutdown with automatic recovery. Short-circuit and thermal stress waveforms are included in the official test report (Rev. 1.2, p.6).

Is the MPQ8616GL-12 IC on this board lead-free and RoHS-compliant?

Yes - the MPQ8616GL-12 used on EVQ8616-L-12-00A is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status on its official Quality Assurance webpage.

Can this evaluation board be used for thermal characterization?

Yes - the board includes thermal vias under the QFN3x4 U1 footprint and uses 2oz copper layers to support accurate junction-to-ambient thermal resistance measurement. Measured thermal shutdown triggers at ~150°C junction temperature, with full recovery within 10 seconds after cooling.