Monolithic Power Systems Inc. EV8865-Q-00A

Overview

EV8865-Q-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP8865GQ synchronous step-down converter, a 6A, 4.5V–21V input, I²C-programmable DC/DC regulator with 1% output accuracy, 600kHz default switching frequency, and QFN3×3 package. It supports real-time VOUT adjustment from 0.6V to 1.87V in 10mV steps and includes OCP, OTP, and OVP protection.

For engineers reviewing the EV8865-Q-00A datasheet, EV8865-Q-00A pinout, EV8865-Q-00A application, or EV8865-Q-00A equivalent, this board enables rapid validation of MP8865GQ's I²C-controlled voltage regulation, power-good signaling, soft-start sequencing, and thermal performance under 6A load conditions in flat-panel TV, set-top box, and distributed power systems.

Technical Context

The EV8865-Q-00A implements the MP8865GQ IC in a fully assembled, tested reference layout with optimized 1μH power inductor (Wurth 744311100), low-ESR ceramic input/output capacitors, and precision feedback resistors. It operates across 4.5V–21V input and delivers up to 6A at 1.2V nominal output with <1% regulation error.

I²C interface (3.4Mbps) enables dynamic control of output voltage, slew rate, switching frequency, and power-saving mode. The board exposes EN, PG, and ADDR pins for system-level integration and includes test points for VIN, VOUT, SW, and PG signals.

Key Specifications

Availability

EV8865-Q-00A is available at Aetrix Electronics and suitable for flat-panel television power design, digital set-top box development, and distributed power system prototyping requiring stable component supply and fast-turn evaluation support.

Supply support for EV8865-Q-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 EV8865-Q-00A belongs to MPS's evaluation board product line, engineered to accelerate adoption of their MP8865GQ programmable buck converter in consumer and industrial power applications demanding precise, software-configurable voltage regulation.

FAQ

What is the primary purpose of the EV8865-Q-00A?

The EV8865-Q-00A is a fully assembled evaluation board for the MP8865GQ synchronous step-down converter. It provides a ready-to-test platform to validate electrical performance-including 6A load capability, I²C programmability, power-good signaling, and thermal behavior-under real-world input/output conditions without custom PCB design.

Does the board support adjustable output voltage via I²C?

Yes. The EV8865-Q-00A enables full I²C control of the MP8865GQ, allowing dynamic adjustment of output voltage from 0.6V to 1.87V in 10mV increments, plus configuration of slew rate, switching frequency (default 600kHz), and power-saving mode-all confirmed in the Rev.1.0 user guide.

What are the key external components included on the board?

The board integrates Wurth 744311100 (1μH, 19A) power inductor, muRata GRM31CR61E226KE15L (22μF, 25V X5R) output capacitors, GRM188R71C224KA01D (0.22μF, 16V X7R) input capacitor, and precision 34kΩ/33kΩ feedback resistors-all selected per MP8865GQ recommended layout and stability criteria.

How is enable and power-good functionality accessed?

The EN pin accepts TTL-compatible logic: >1.4V enables regulation; <1.25V disables it. The open-drain PG pin asserts high when VOUT is within ±10% of target and all protections are inactive. Both signals are routed to test points and labeled silkscreen pads for direct probing or system interfacing.

Is thermal performance characterized on this board?

Yes. Test results in the official documentation show thermal imaging and temperature rise data under 6A load at 12V input and 1.2V output. The QFN3×3 MP8865GQ package is mounted with exposed thermal pad soldered to internal copper layers, achieving ≤45°C junction rise above ambient at full load with no forced airflow.