Monolithic Power Systems Inc. EVM3810-QB-01A

Overview

EVM3810-QB-01A from Monolithic Power Systems is an evaluation board for the MPM3810GQB synchronous step-down switcher IC, demonstrating 1.2A peak output at 1.2V from a 2.5–6V input, featuring constant-on-time (COT) control, integrated MOSFETs and inductor, and ultra-low 17μA quiescent current - used for rapid validation of compact DC/DC power stages in space-constrained portable and storage applications.

For engineers reviewing the EVM3810-QB-01A datasheet, EVM3810-QB-01A pinout, EVM3810-QB-01A application, or EVM3810-QB-01A equivalent, this board enables fast functional verification of the MPM3810GQB's adjustable/fixed-output configurations, thermal performance under load, COT loop response, and power-good sequencing behavior without custom PCB design.

Technical Context

The EVM3810-QB-01A implements the MPM3810GQB - a fully integrated 3.0×2.5×0.9mm QFN buck converter with internal high- and low-side MOSFETs and power inductor. It operates across 2.5–6V input and delivers up to 1.2A peak output with fixed 1.2V or externally adjustable 0.6–6V output via resistor divider feedback.

Its constant-on-time control architecture enables fast transient response and light-load efficiency optimization by dynamically scaling switching frequency; protection features include cycle-by-cycle over-current, hiccup-mode short-circuit response, and thermal shutdown - all validated on this pre-layout-optimized 6×3.8mm board.

Key Specifications

Availability

EVM3810-QB-01A is available at Aetrix Electronics and suitable for portable electronics validation, SSD/HDD power subsystem prototyping, and low-voltage I/O rail development requiring stable component supply and rapid functional verification.

Supply support for EVM3810-QB-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 MPM3810 product line targets ultra-compact, high-efficiency point-of-load regulation for battery-powered and space-limited systems - integrating power MOSFETs, inductor, and controller to eliminate layout-sensitive external components.

FAQ

What input voltage range does the EVM3810-QB-01A support?

The board supports 2.5V to 6V DC input, matching the operating range of the MPM3810GQB IC. This covers common sources including single-cell Li-ion batteries (2.7–4.2V), USB 5V rails, and regulated 3.3V/5V system supplies - verified per Rev. 1.3 schematic and BOM.

Can the output voltage be adjusted, and how?

Yes - the default 1.2V output is set by 40.2kΩ resistors (R1, R2) forming a feedback divider. To adjust, replace R2 with a value calculated as R2 = R1 × (VOUT / 0.6 − 1); R1 should remain 40–80kΩ. The board accommodates 0.6V to 6V output with appropriate resistor selection.

What protection features are implemented and tested on this board?

The EVM3810-QB-01A demonstrates cycle-by-cycle over-current protection, hiccup-mode short-circuit response, and thermal shutdown - all inherent to the MPM3810GQB IC and confirmed in the Rev. 1.3 quick-start guide and functional test procedures.

Is the board compatible with fixed-output versions of the MPM3810?

Yes - the board can be modified for fixed-output variants (e.g., MPM3810GQB-18, -25, -33) by replacing U1 and removing R1/R2 per the Rev. 1.3 Quick Start Guide. Table 1 lists supported fixed-VOUT options and their corresponding part numbers.

What is the total solution size, and what does it include?

The total solution size is 6.0mm × 3.8mm - measured from board outline - and includes the MPM3810GQB QFN IC, two 10μF ceramic input/output capacitors (C1/C3), and feedback resistors. No additional components are required for basic operation.

Does the board provide power-good signaling and enable control?

Yes - the MPM3810GQB IC on this board includes dedicated EN (enable) and PG (power-good) pins, supporting precise power sequencing in multi-rail systems. These signals are routed to test points and accessible per the Rev. 1.3 schematic and layer drawings.