Monolithic Power Systems Inc. EV2143H-D-00A

Overview

EV2143H-D-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP2143H synchronous step-down converter, delivering up to 3A continuous output at 1.2V from a 2.5V–5.5V input, with 2MHz switching frequency, internal 80mΩ/40mΩ MOSFETs, and constant-on-time control for fast transient response in low-voltage power delivery applications.

For engineers reviewing the EV2143H-D-00A datasheet, EV2143H-D-00A pinout, EV2143H-D-00A application, or EV2143H-D-00A equivalent, this board enables rapid validation of MP2143H performance in FPGA core rail, DSP I/O supply, battery-powered instrumentation, and automotive subsystem power sequencing under real thermal and layout conditions.

Technical Context

The EV2143H-D-00A implements two PCB layouts-tiny and normal-to compare thermal behavior under identical electrical conditions: VIN = 5V, VOUT = 1.2V, L = 0.47μH, COUT = 22μF. Both support EN control, power-good signaling, and hiccup-mode short-circuit protection per MP2143H's integrated fault handling.

It validates key MP2143H features including 100% duty-cycle operation in dropout, auto-discharge at shutdown, and stable regulation with low-ESR ceramic capacitors-verified using 0805 and 1206 MLCCs per layout variant and confirmed via oscilloscope waveforms across load steps, line transients, and startup sequences.

Key Specifications

Availability

EV2143H-D-00A is available at Aetrix Electronics and suitable for FPGA power validation, portable instrument design, and automotive subsystem prototyping requiring stable component supply, quick-turn evaluation, and documented thermal performance data.

Supply support for EV2143H-D-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 analog semiconductor company specializing in high-efficiency DC-DC power conversion ICs, with over two decades of expertise in monolithic buck, boost, and LED drivers.

The MP2143H product line targets space-constrained, high-current digital power rails-designed specifically for low-voltage I/O systems, handheld devices, and automotive infotainment modules where thermal density and transient response are critical.

FAQ

What is the primary purpose of the EV2143H-D-00A evaluation board?

The EV2143H-D-00A is a dedicated hardware platform for evaluating the MP2143H 3A synchronous step-down converter. It provides two PCB layouts (tiny and normal) to assess thermal performance, validate 2MHz switching stability, and verify EN-controlled startup, power-good signaling, and hiccup-mode fault recovery under real load conditions.

Does the board support adjustable output voltage?

No. The EV2143H-D-00A is configured for fixed 1.2V output using resistor dividers matching the MP2143H's internal reference. Output voltage adjustment requires modifying feedback resistors per MP2143H's external VREF configuration-this board is optimized for out-of-box validation of the default 1.2V setting used in FPGA I/O applications.

How do the "tiny" and "normal" layouts differ electrically and thermally?

Both layouts use identical components and schematic topology but differ in copper area, trace width, and thermal pad implementation. The normal layout provides lower thermal resistance and higher sustained current capability; the tiny layout demonstrates minimum footprint viability-measured temperature rise and efficiency curves are provided in the Rev.1.0 test report for direct comparison.

Can the board operate below 2.5V input?

No. The MP2143H IC has a 2.5V minimum input specification, and the EV2143H-D-00A board is not rated for operation below that threshold. Attempting sub-2.5V input may cause startup failure, unstable regulation, or disable internal bias circuitry-per MP2143H's absolute maximum ratings and functional specifications.

Is the board RoHS-compliant and lead-free?

Yes. All components on the EV2143H-D-00A-including the MP2143HGD QFN10 IC, Murata MLCCs, Würth inductor, and Yageo resistors-are RoHS-compliant, lead-free, and halogen-free, consistent with MPS's green manufacturing policy and documented on the official MPS Quality Assurance webpage.

What external equipment is required to operate the board?

A lab power supply (2.5V–5.5V, ≥3.5A), electronic load (for dynamic testing), and oscilloscope (for waveform capture) are required. No programming or firmware is needed-the board operates autonomously upon VIN application, with optional EN pin control via TTL-level logic signals.