Monolithic Power Systems Inc. EV2349-G-00A

Overview

EV2349-G-00A from Monolithic Power Systems is an evaluation board for the MP2349 synchronous step-down converter IC, designed to validate 3.3V/6.5A power delivery in compact embedded systems. It implements the MP2349GG QFN-11 (2mm × 2mm) IC with adaptive COT control, 105μA quiescent current, and full protection (OCP/OVP/UVP/thermal shutdown), targeting security cameras and digital set-top boxes.

For engineers reviewing the EV2349-G-00A datasheet, EV2349-G-00A pinout, EV2349-G-00A application, or EV2349-G-00A equivalent, this board enables rapid validation of input range (8–24V), efficiency curves (up to 95% at 12V_IN), transient response, remote sense accuracy, and mode selection (PFM/PWM/ultrasonic) under real load conditions.

Technical Context

The EV2349-G-00A implements the MP2349's fixed 700kHz switching frequency and adaptive Constant-On-Time control loop, enabling sub-10μs load transient recovery from 3A to 6A steps. Its DC auto-tune loop dynamically adjusts compensation based on output capacitor ESR and remote differential sense traces, improving line regulation across ±5% VIN variation.

Board-level design integrates a 2.2μH/14A inductor (Wurth 74437349022), 22μF POSCAP-compatible input/output capacitance, and selectable EN threshold (7.5V default via R7=453kΩ). It supports forced PWM, auto PFM/PWM, and ultrasonic mode to suppress audible noise in sensitive audio-adjacent applications.

Key Specifications

Availability

EV2349-G-00A is available at Aetrix Electronics and suitable for security camera power validation, digital set-top box reference design bring-up, and flat-panel display auxiliary rail testing requiring stable component supply, traceable sourcing, and documented test data.

Supply support for EV2349-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 over two decades of expertise in DC/DC conversion and power management solutions.

The MP2349 product line targets space-constrained, high-efficiency point-of-load applications-especially in surveillance, broadband, and consumer display systems-where ultra-low IQ, fast transient response, and minimal external component count are critical.

FAQ

What input voltage range is validated on the EV2349-G-00A?

The board is fully characterized from 8V to 24V input, with efficiency plots and ripple measurements provided at 5V, 12V, 19V, and 24V. The EN resistor divider sets a default 7.5V VIN rising threshold; for 5V operation, R7 must be changed to 200kΩ per the schematic note.

Does the EV2349-G-00A support remote voltage sensing?

Yes-it implements remote differential sense using dedicated SNS+ and SNS− traces routed to the MP2349's feedback network, enabling accurate load regulation independent of PCB trace resistance. This is confirmed in the DC auto-tune loop description and test results showing <±0.5% line/load regulation.

How is enable functionality implemented on this evaluation board?

The EN pin accepts a logic-level signal: drive >1.4V to enable the regulator, <0.4V to disable it. Voltage must not exceed 4.5V. Startup/shutdown waveforms-including enable-controlled VOUT rise/fall and inductor current behavior-are documented across all operating modes (PFM, USM, forced CCM).

Which output capacitors are used, and why are they compatible with POSCAP?

The board uses three 22μF/16V X5R 0805 ceramic capacitors (C2B/C2C/C2D) plus 22μF/25V X5R 1206 ceramics (C1A/C1B). Their low ESR and stable capacitance over temperature meet MP2349's stability requirements with POSCAPs, as confirmed by the "Stable with POSCAP and Ceramic Cap" feature statement and no-compensation-loop design.

Can the EV2349-G-00A be used to evaluate ultrasonic mode operation?

Yes-the board supports ultrasonic mode selection via the MODE pin configuration. Test waveforms in the documentation explicitly show VSW and IL behavior under USM, confirming suppression of switching noise below 20kHz while maintaining regulation during 3A→6A load transients.

What inductor is populated, and how does its saturation current affect peak performance?

A Wurth 74437349022 (2.2μH, 12mΩ DCR, 14A I_SAT) is used. Its 14A saturation rating exceeds the documented 7.5A peak output current, ensuring inductor core remains unsaturated during startup, short-circuit recovery, and heavy transient events-verified in the "Short Circuit Protection Entry/Recovery" oscilloscope captures.