Monolithic Power Systems Inc. EV8860-Q-00A

Overview

EV8860-Q-00A from Monolithic Power Systems is an evaluation board for the MP8860 synchronous 4-switch buck-boost converter IC, designed to validate operation of USB PD sourcing ports and wide-input bus supplies. It supports 2.8V–22V input, delivers up to 1A at 5V output, features I²C programmability (four addresses, OTP memory), and integrates protection including hiccup-mode OVP/SCP/OCP and thermal shutdown.

For engineers reviewing the EV8860-Q-00A datasheet, EV8860-Q-00A pinout, EV8860-Q-00A application, or EV8860-Q-00A equivalent, this board enables rapid validation of MP8860's I²C-configurable output voltage (1V–20.47V, 10mV steps), adjustable CC limit, line-drop compensation, soft-start timing, and forced-PWM vs. auto PFM/PWM mode selection under real load transients and thermal conditions.

Technical Context

The EV8860-Q-00A implements the MP8860 IC in a four-layer 6.35cm × 6.35cm PCB layout optimized for low-noise buck-boost operation. It includes all critical passive components: 4.7μH power inductor (7A Isat), input/output bulk capacitors (100μF electrolytic + 22μF/10μF ceramic), and precision current-sense resistors (21.5kΩ for 2A OCP default).

It exposes all MP8860 control and monitoring signals-EN, NSE, ALT, ADD, VOUTSENSE, VINSENSE-via test points and 2.54mm headers. The board operates with default OTP settings: 5V output, 500kHz switching frequency, 900μs soft start, forced PWM mode, and enabled output discharge, all modifiable via I²C commands.

Key Specifications

Availability

EV8860-Q-00A is available at Aetrix Electronics and suitable for USB PD sourcing port development, industrial bus supply prototyping, and embedded system power architecture validation requiring stable component supply, traceable evaluation hardware, and fast-turn design iteration.

Supply support for EV8860-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 expertise in DC/DC conversion, motor drivers, and LED lighting solutions.

The MP8860 product line targets USB PD-compliant power delivery systems and wide-input industrial bus supplies, emphasizing I²C configurability, integrated MOSFETs, and robust protection for unattended operation.

FAQ

What is the primary function of the EV8860-Q-00A?

The EV8860-Q-00A is a fully assembled evaluation board for the MP8860 4-switch buck-boost converter IC. It enables functional verification, performance characterization, and firmware integration testing-including I²C register access, load transient response, and protection behavior-without requiring custom PCB design or component sourcing.

Does the board support USB PD compliance testing?

Yes. The board implements the MP8860's USB PD-specific features: programmable output voltage (1V–20.47V), accurate constant-current limit adjustment, line-drop compensation, and hiccup-mode fault recovery-all required for USB PD 3.0 sourcing port validation per USB-IF specifications.

How is I²C communication implemented on this board?

I²C signals (SDA/SCL) are routed to a standard 4-pin header (CN1). The ALT pin selects one of four I²C addresses; ADD pin sets device address bits. All registers-including output voltage, current limit, soft start, and protection thresholds-are accessible using standard I²C write/read commands per MP8860 datasheet.

What are the default OTP settings loaded on power-up?

Default OTP configuration includes: 5V output voltage, 2A OCP threshold (set by 21.5kΩ resistor), 500kHz switching frequency, forced PWM mode, 900μs soft-start time, no line-drop compensation, and enabled output discharge. These can be overwritten via I²C before OTP lock.

Can the board operate outside the 12V input condition shown in waveforms?

Yes. The board is rated for 2.8V–22V input and has been validated across this full range. Efficiency curves (Fig. 1) and transient waveforms in the reference document include data at VIN = 12V, 9V, and 20V, confirming stable regulation and protection activation across all specified inputs.

Is thermal performance characterized on this board?

Yes. The board includes thermal shutdown and over-temperature warning functionality tied to the MP8860's internal sensor. Layout uses exposed pad soldering and internal copper planes to dissipate heat; thermal shutdown triggers at ~150°C junction temperature, with recovery after cooldown.