Monolithic Power Systems Inc. EVKT-8869W

Overview

EVKT-8869W from Monolithic Power Systems is an evaluation kit for the MP8869W synchronous step-down converter IC, enabling rapid characterization of its I²C-programmable 1V/12A output, slew rate control, telemetry monitoring, and protection features under real-world input conditions (3V–18V). It integrates the EV8869W-L-00A evaluation board and EVKT-USBI2C-02 USB-to-I²C interface for full digital configuration.

For engineers reviewing the EVKT-8869W datasheet, EVKT-8869W hardware setup, EVKT-8869W software GUI integration, or EVKT-8869W alternative evaluation platforms, this kit provides validated test infrastructure to verify MP8869W behavior-including OCP/OVP mode selection, PFM enablement, soft-stop sequencing, and real-time VOUT/IOUT telemetry-prior to system-level design commitment.

Technical Context

The EVKT-8869W implements a complete functional test environment for the MP8869W DC/DC controller, supporting full register-level access via I²C using MPS's Virtual Bench Pro GUI. It operates across the device's full input range (3V–18V) and delivers stable 1V output at up to 12A continuous current with thermal and overcurrent fault reporting.

Hardware includes the EV8869W-L-00A PCB (8.5cm × 8.5cm) with onboard MP8869WGL in QFN-22 package and the EVKT-USBI2C-02 interface, which provides galvanically isolated I²C/PMBus communication, USB enumeration, and driver support for Windows XP/7+ with .NET Framework 4.0.

Key Specifications

Availability

EVKT-8869W is available at Aetrix Electronics and suitable for power supply validation, PMBus-enabled system integration, and digital DC/DC controller qualification requiring stable component supply and documented reference firmware interaction.

Supply support for EVKT-8869W 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 power management ICs, including DC/DC converters, LED drivers, and motor drivers for industrial, computing, and automotive applications.

The EVKT-8869W belongs to MPS's digital power evaluation platform family, designed specifically to accelerate adoption of I²C- and PMBus-configurable buck regulators like the MP8869W in programmable power systems.

FAQ

Is EVKT-8869W recommended for new designs?

No. Monolithic Power Systems explicitly states "NOT RECOMMENDED FOR NEW DESIGNS" in the official user guide and directs users to the EVKT-8869S instead. This reflects MP8869W's end-of-life status and replacement by newer silicon revisions with enhanced features or reliability.

What software is required to operate EVKT-8869W?

The MPS I²C GUI is mandatory. It runs on Windows XP/7+ with .NET Framework 4.0, connects via the included EVKT-USBI2C-02 interface, and provides full read/write access to MP8869W registers-including VSEL, System1, and System2-for voltage setting, OCP mode selection, and telemetry polling.

Does configuration persist after power cycling?

No. All I²C register changes-including output voltage, slew rate, PFM enable, and current limit-are volatile and reset to factory defaults upon power-down. Persistent configuration requires external EEPROM or host MCU firmware implementation outside the kit.

What are the critical hardware connections needed?

Three wires must be connected between EV8869W-L-00A and EVKT-USBI2C-02: SCL (I²C clock), SDA (I²C data), and GND. Incorrect wiring or missing ground causes GUI connection failure, shown as "EVB is disconnected" or "Communication Board is disconnected" warnings.

Can EVKT-8869W evaluate thermal performance?

Yes. The kit supports continuous 12A operation at 1V output within its 3V–18V input range and includes overtemperature shutdown detection. Telemetry reports die temperature status, and thermal recovery behavior can be observed when ambient cooling reduces junction temperature below the OT threshold.

Is EVKT-USBI2C-02 compatible with other MPS evaluation kits?

Yes. EVKT-USBI2C-02 is MPS's standardized USB-to-I²C/PMBus interface, supporting all digital power ICs in the MP88xx, MPQ86xx, and MP28xx families. Its USBXpress driver ensures consistent enumeration and register-level access across multiple evaluation platforms.