Monolithic Power Systems Inc. EVM3811-G-00A

Overview

EVM3811-G-00A from Monolithic Power Systems is an evaluation board for the MPM3811GG monolithic synchronous step-down DC-DC module, featuring integrated inductor, 2.2 MHz switching frequency, 1A output current capability, and 1.2V fixed output voltage. It supports input range 2.3V–5.5V and enables rapid validation of power delivery in space-constrained portable electronics.

For engineers reviewing the EVM3811-G-00A datasheet, EVM3811-G-00A pinout, EVM3811-G-00A application, or EVM3811-G-00A equivalent, this board provides verified reference design, thermal performance data, transient response waveforms, and bill-of-materials traceability for MPM3811-based power supply integration.

Technical Context

The EVM3811-G-00A implements a complete test platform for the MPM3811GG IC, which uses Constant-On-Time (COT) control to deliver fast load-transient response and high light-load efficiency. The board integrates all required passive components-two 0402 resistors (R1/R2 = 200kΩ), one 0402 resistor (R3 = 100kΩ), a 10µF/6.3V X5R input capacitor (C1), and a 22µF/6.3V X5R output capacitor (C2).

Designed for direct connection to standard lab power supplies and loads, the board exposes VIN, VOUT, GND, EN, and FB terminals with 0.1" pitch headers. Its layout follows MPS-recommended thermal and EMI practices, including optimized ground plane, short high-current paths, and controlled impedance routing for SW node integrity.

Key Specifications

Availability

EVM3811-G-00A is available at Aetrix Electronics and suitable for portable device power validation, wireless module reference design, and battery-powered system prototyping requiring stable component supply and documented thermal/transient behavior.

Supply support for EVM3811-G-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 semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC-DC conversion, LED drivers, and motor control solutions.

The MPM3811 product line delivers ultra-compact, fully integrated power modules targeting space-constrained applications such as wearables, IoT sensors, and portable medical devices where board area and design simplicity are critical.

FAQ

What is the default output voltage of the EVM3811-G-00A?

The board is configured for 1.2V output using a 200kΩ/200kΩ resistor divider on the FB pin. This matches the typical application requirement for powering low-voltage I/O rails in portable systems and can be reconfigured down to 0.6V by adjusting R2 per the formula VOUT = 0.6 × (1 + R1/R2).

Does the EVM3811-G-00A include the MPM3811GG IC?

Yes - U1 on the board is the MPM3811GG in QFN10 (2mm × 2mm × 1.6mm) package. It integrates power MOSFETs, controller, and shielded inductor, enabling a complete 1A buck solution with only two external capacitors and feedback resistors.

Can the EVM3811-G-00A operate below 2.3V input?

No - the MPM3811GG IC has a minimum input voltage of 2.3V per its electrical specifications. Operation below this threshold is not guaranteed and may result in dropout, regulation loss, or failure to start; the board reflects this hard limit in its validated test conditions.

What protection features are verified on this evaluation board?

The board demonstrates cycle-by-cycle overcurrent protection, thermal shutdown (triggering above 125°C), and hiccup-mode short-circuit recovery - all captured in oscilloscope waveforms across startup, load step, and fault conditions in the official Rev. 1.0 test report.

Is the EVM3811-G-00A RoHS-compliant and lead-free?

Yes - all components on the board, including the MPM3811GG IC, meet RoHS Directive requirements and are halogen-free. MPS confirms green status for this part family on its Quality Assurance webpage, with full material declarations available upon request.

How is enable sequencing implemented on this board?

The EN pin is brought out to a header and pulled high via an onboard 100kΩ resistor (R3). Applying a logic-low signal (<0.4V) disables the converter, initiating controlled shutdown with output discharge - verified in EN ON/OFF transient waveforms in the test report.