Monolithic Power Systems Inc. EVM3683-7-QN-01A

Overview

EVM3683-7-QN-01A from Monolithic Power Systems is an evaluation board designed to demonstrate the MPM3683-7 8A continuous, 10A peak DC/DC power module operating from 4–16V input and delivering 1.2V output with COT control, 600–1000 kHz selectable switching frequency, and QFN-28 (7×7×4 mm) package integration in telecom and server power applications.

For engineers reviewing the EVM3683-7-QN-01A datasheet, EVM3683-7-QN-01A pinout, EVM3683-7-QN-01A application, or EVM3683-7-QN-01A equivalent, this board enables rapid validation of transient response, efficiency across 4–16V input, remote sensing accuracy, thermal performance under 10A load, and mode selection via JP1 jumper for FCCM vs. pulse-skip operation.

Technical Context

The EVM3683-7-QN-01A implements the MPM3683-7 IC in a fixed 1.2V output configuration with differential remote sense (FB/REF pins), adaptive Constant-On-Time control architecture, and internal bias support enabling 4–16V operation without external 3.3V supply. It supports pre-bias start-up and output discharge functionality.

Board-level features include selectable 600/800/1000 kHz switching via MODE pin (JP1), non-latch OCP/UVP/UVLO/OVP/thermal shutdown protection, and 7×7 mm QFN-28 footprint matching the MPM3683-7's thermal pad layout and SW/PGND routing for low-inductance high-current paths.

Key Specifications

Availability

EVM3683-7-QN-01A is available at Aetrix Electronics and suitable for telecom base station power validation, industrial embedded controller DC/DC prototyping, and server VRM reference design requiring stable component supply and documented thermal performance up to 10A peak load.

Supply support for EVM3683-7-QN-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

This evaluation board supports the MPM3683-7 product line-designed for space-constrained, high-efficiency point-of-load (POL) conversion in networking, computing, and industrial systems where fast transient response and thermal robustness are critical.

FAQ

Is EVM3683-7-QN-01A recommended for new designs?

No. The official documentation states "NOT RECOMMENDED FOR NEW DESIGNS" and directs users to EVM3683-10-MN-01A. This reflects MPS's product lifecycle transition to the updated evaluation platform with enhanced capabilities, not a functional defect in the current board.

What is the role of JP1 on the board?

JP1 configures the MODE pin of the MPM3683-7 to select switching frequency: open = 600 kHz, shorted to GND = 800 kHz, shorted to VCC = 1000 kHz. This directly sets the oscillator frequency without external resistor networks.

Does the board support remote voltage sensing?

Yes. The board implements differential remote sense using FB and REF pins connected to VOUT+ and VOUT− test points, enabling accurate regulation at the load by compensating for PCB trace IR drop.

Can the output voltage be adjusted?

No-the EVM3683-7-QN-01A is configured for fixed 1.2V output. While the underlying MPM3683-7 supports adjustable output (0.6–5.5V) via external resistor divider on FB, this board uses a factory-set 1.2V configuration with no onboard adjustment components.

What thermal performance can be expected at 8A continuous load?

Per MPS Rev. 1.3 test data at VIN=12V, VOUT=1.2V, TA=25°C, the board achieves >90% efficiency at 8A, with junction temperature rise limited by the QFN-28 thermal pad and 6-layer PCB stack-up-validated in thermal imaging reports included in the official documentation.

How is enable and power-good functionality implemented?

EN is routed to a test point and pull-up resistor; PG is brought out to a dedicated header pin. Both signals follow MPM3683-7 specifications: EN active-high with 1.2V threshold, PG asserts after soft-start completion and valid output regulation.