Monolithic Power Systems Inc. EV28114DG-00A

Overview

EV28114DG-00A from Monolithic Power Systems is an evaluation board for the MP28114 1.7MHz synchronous buck converter, designed to demonstrate low-dropout DC/DC conversion from 2.5V–6V input to adjustable 0.6V–1.8V output with up to 600mA load current in portable Li+-powered systems.

For engineers reviewing the EV28114DG-00A datasheet, EV28114DG-00A pinout, EV28114DG-00A application, or EV28114DG-00A equivalent, this board enables rapid validation of MP28114 performance under real-world thermal, transient, and layout-sensitive conditions-especially for core voltage regulation in space-constrained handheld devices.

Technical Context

The EV28114DG-00A implements a fixed-frequency (1.7MHz) current-mode PWM control architecture with integrated high-side MOSFET and synchronous rectifier, eliminating external Schottky diode requirements and enabling >95% peak efficiency at 600mA. It supports 100% duty-cycle operation for ultra-low dropout down to V_OUT.

Board-level design includes FB voltage divider (R1=300kΩ, R2=150kΩ), 2.2μH power inductor (TOKO D52LC-#A914BYW-2R2M), and ceramic output capacitors (C2=10μF X5R, C1=4.7μF X5R), all optimized for stable regulation across 2.5–6V input and 0.6–1.8V output ranges.

Key Specifications

Availability

EV28114DG-00A is available at Aetrix Electronics and suitable for cellular phone power validation, microprocessor core supply prototyping, and portable instrument DC/DC subsystem development requiring stable component supply and documented reference design fidelity.

Supply support for EV28114DG-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 expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP28114 product line targets ultra-compact, high-efficiency power management for battery-powered consumer electronics-designed specifically for low-voltage, high-current core rail generation where thermal density and footprint are critical.

FAQ

What is the default output voltage setting on the EV28114DG-00A?

The board ships with R1=300kΩ and R2=150kΩ, setting V_OUT to 1.8V using the MP28114's 0.6V feedback reference. This configuration is verified per the Quick Start Guide and matches the schematic on page 2 of the Rev. 1.0 document.

Can the EV28114DG-00A be used with fixed-output versions of the MP28114?

Yes-the board supports fixed-output variants by removing R1 and R2 and shorting R1's pads. The MP28114DG package code indicates a fixed 1.8V version, and the board's U1 footprint and layout accommodate it without modification.

What is the recommended input capacitor for stable operation?

The board uses C1=4.7μF X5R (TDK C2012X5R1A475K) on the VIN rail. This value meets MP28114's minimum 4.7μF requirement for 2.5–6V input and provides sufficient bulk capacitance to suppress ripple and sustain transient loads up to 600mA.

How is enable functionality implemented on this evaluation board?

EN is routed to J1, which defaults to connect VIN to EN-automatically enabling the MP28114 when input power is applied. For manual control, J1 can be opened and a 0–0.3V signal applied to disable, or 1.5–6V to enable, per the MP28114's logic thresholds.

Does the board include thermal management features beyond IC-level protection?

Yes-the 2-layer PCB uses exposed copper on the bottom layer beneath U1 (MP28114 QFN8) to enhance heat dissipation. Layout notes confirm thermal relief vias under the IC pad, and the 2.5″×2.5″ form factor allows forced-air or heatsink attachment during extended 600mA testing.