Monolithic Power Systems Inc. EV2131-G-00A

Overview

EV2131-G-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2131 synchronous step-down switcher IC - a 4A, 1.2MHz constant-on-time buck converter with integrated 32mΩ/17mΩ MOSFETs, supporting 2.7–5.5V input and regulated 1.2V output for single-cell Li+-powered portable devices.

For engineers reviewing the EV2131-G-00A datasheet, EV2131-G-00A pinout, EV2131-G-00A application, or EV2131-G-00A equivalent, this board enables rapid validation of efficiency, transient response, power sequencing (via EN and PG), short-circuit hiccup behavior, and low-ESR ceramic capacitor stability under real load conditions up to 4A.

Technical Context

The EV2131-G-00A implements the MP2131GG QFN12 (2×2mm) IC in a fully assembled, tested layout optimized for high-frequency switching performance: input decoupling capacitors placed directly at Pins 1 (VIN) and 3 (GND), 1.0μH shielded inductor (Wurth 74437324010), and ceramic output capacitance totaling 32μF (22μF + 10μF).

It supports key functional verification including startup/shutdown sequencing via VIN or EN, output ripple measurement (<100mVpp at 4A), thermal shutdown response, cycle-by-cycle overcurrent protection, and auto-discharge during disable - all validated per MPS EVB test report Rev.1.0 (Nov 2014) at TA = 25°C, VIN = 5V, VOUT = 1.2V.

Key Specifications

Availability

EV2131-G-00A is available at Aetrix Electronics and suitable for portable device power validation, Li+-battery system design verification, and high-frequency DC-DC converter qualification requiring stable component supply and documented reference performance.

Supply support for EV2131-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 MP2131 product line targets ultra-compact, high-efficiency power delivery for space-constrained portable electronics - emphasizing low quiescent current (19μA), fast transient response, and seamless integration with ceramic capacitors.

FAQ

What input voltage range is supported by the EV2131-G-00A?

The board accepts 2.7V to 5.5V DC input, matching the operational range of the MP2131 IC. This covers standard single-cell lithium-ion (3.0–4.2V) and lithium-polymer batteries, plus regulated 3.3V or 5V system rails. Input must be applied before enabling the regulator to avoid latch-up.

How is output voltage set on this evaluation board?

The EV2131-G-00A delivers a fixed 1.2V output determined by the internal feedback divider of the MP2131GG IC. No external resistors are populated for VOUT adjustment; the board is configured for direct validation of the default 1.2V setting as specified in the MP2131 datasheet.

Does the board include power-good (PG) and enable (EN) functionality?

Yes - the board exposes both EN and PG signals via test points and solder pads. EN accepts logic-level input (≥1.2V to enable, ≤0.4V to disable); PG asserts high when VOUT is within ±10% regulation. These pins support precise power sequencing in multi-rail systems.

What inductor and capacitors are used on the EV2131-G-00A?

The board uses a Wurth 74437324010 (1.0μH, 9A ISAT, 27mΩ DCR) shielded power inductor and two ceramic capacitors: Taiyo Yuden LMK212BJ226MG-T (22μF, 10V, X5R, 0805) and Murata GRM21BR70J106KE76L (10μF, 6.3V, X5R, 0805), placed per MPS layout guidelines.

Can the EV2131-G-00A be used to evaluate other output voltages?

No - this board is configured exclusively for 1.2V output using the MP2131's internal feedback. To evaluate alternate voltages (e.g., 3.3V), users must refer to the MP2131 datasheet and design a custom board with appropriate external resistor dividers, as the EV2131-G-00A has no provision for VOUT reconfiguration.

Is thermal performance data available for this evaluation board?

Yes - the official EVB test report (Rev.1.0) includes thermal shutdown verification waveforms and efficiency vs. load plots at 25°C ambient. At 4A/1.2V output with 5V input, typical board temperature rise is <25°C above ambient under free-air convection, consistent with QFN12 package thermal characteristics.