Monolithic Power Systems Inc. EVQ8616-L-6-00A

Overview

EVQ8616-L-6-00A from Monolithic Power Systems is an evaluation board for the MPQ8616GL-6 monolithic synchronous step-down converter, delivering 6A continuous output at 1.2V from a 3–6V input. It implements Constant-On-Time (COT) control, features ground-referenced remote ON/OFF enable, and supports programmable soft start and pre-bias startup. Used for validating high-efficiency point-of-load regulation in telecom and server power rails.

For engineers reviewing the EVQ8616-L-6-00A datasheet, EVQ8616-L-6-00A pinout, EVQ8616-L-6-00A application, or EVQ8616-L-6-00A equivalent, this board enables rapid validation of MPQ8616GL-6 performance under real load transients, line/load regulation, efficiency mapping, and enable-control timing - critical for distributed 1.2V/6A power delivery in networking and base station designs.

Technical Context

The EVQ8616-L-6-00A implements a complete reference design for the MPQ8616GL-6, a 600kHz fixed-frequency COT-controlled buck converter with integrated 19.8mΩ/15.3mΩ MOSFETs. Its layout adheres to high-current, low-noise routing practices, including dedicated ground planes, optimized thermal vias, and controlled-impedance feedback traces.

It supports full functional verification: remote enable (EN referenced to GND), output voltage setting via external resistor divider (R1/R2), VOUT sensing (VOUTSENSE), input voltage monitoring (VINSENSE), and power-good signaling (PG). All protections - non-latch OCP, OVP, and thermal shutdown - are fully operational and test-accessible.

Key Specifications

Availability

EVQ8616-L-6-00A is available at Aetrix Electronics and suitable for telecom base station power validation, server VRM prototyping, and networking switch PoL development requiring stable component supply and repeatable lab characterization.

Supply support for EVQ8616-L-6-00A 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 and mixed-signal semiconductor company specializing in high-performance power management ICs, with over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting solutions.

The MPQ8616GL-6 product line targets high-density, high-efficiency point-of-load applications in telecom infrastructure and enterprise computing, emphasizing fast transient response, low quiescent current, and robust protection in thermally constrained environments.

FAQ

What is the primary function of the EVQ8616-L-6-00A?

This is a fully assembled and tested evaluation board for the MPQ8616GL-6 synchronous buck converter. It provides immediate hardware access to all device pins, validated thermal and electrical performance up to 6A, and supports full functional testing - including enable control, power-good signaling, and output voltage adjustment - without requiring custom PCB design.

Can the output voltage be adjusted, and how?

Yes. The default 1.2V output is set by R1 and R2 (10kΩ each) forming a resistor divider that references the 0.6V internal feedback node. To change VOUT, replace R1/R2 per the MPQ8616GL-6 datasheet's VFB equation: VOUT = 0.6V × (1 + R1/R2). No solder jumpers or firmware changes are required.

Does the board support pre-bias startup?

Yes. The MPQ8616GL-6 IC on this board supports pre-bias startup, allowing the output capacitor to be pre-charged before enable. This prevents reverse current flow and ensures safe powering of downstream circuits already holding residual voltage - confirmed in the board's quick-start guide and test reports.

What input capacitance configuration is used, and why?

The board uses seven 22µF/16V X7R ceramic capacitors (1210 package) plus one 4.7µF/16V (1206) and one 1µF/16V (0603) for total input capacitance >160µF. This low-ESR, high-frequency decoupling minimizes input ripple and sustains 6A load steps without violating input voltage droop limits during COT operation.

Is thermal performance characterized, and what cooling method is recommended?

Yes. Thermal imaging and junction temperature measurements confirm ≤65°C rise at 6A/5V input/1.2V output with 200 LFM airflow. The board uses a 4-layer stackup with internal copper planes and thermal vias under the QFN3x4 U1 footprint. No heatsink is required for lab use, but forced air is advised for sustained 6A operation above 45°C ambient.

How is power-good (PG) functionality implemented?

PG is routed to a dedicated header pin and asserts high (open-drain, pulled up to 3.3V on-board) when VOUT reaches 90% of target and remains stable. It is electrically isolated from other signals and can directly interface with FPGA or processor reset controllers to sequence downstream power domains.