Monolithic Power Systems Inc. EVKT-8843

Overview

EVKT-8843 from Monolithic Power Systems is an evaluation kit for the MP8843 synchronous step-down converter IC, enabling rapid functional validation and I²C-based configuration of output voltage (0.6V–5.5V), switching frequency (500kHz–2.2MHz), slew rate, PFM/PWM mode, and protection status monitoring. It targets power supply design verification in portable electronics, USB-powered systems, and compact DC-DC modules.

For engineers reviewing the EVKT-8843 datasheet, EVKT-8843 pinout, EVKT-8843 application, or EVKT-8843 equivalent, this kit provides hands-on access to real-time register-level control of the MP8843GG via MPS I²C GUI, full hardware test setup guidance, Windows-compatible software stack, and traceable component sourcing for pre-production validation.

Technical Context

The EVKT-8843 comprises two physical units: the EV8843-G-00A evaluation board hosting the MP8843GG in a 12-pin QFN package, and the EVKT-USBI2C-02 USB-to-I²C interface supporting PMBus-compliant communication. Both operate from 2.5V–6V input and enable full digital control without soldering or hardware modification.

It implements a complete test environment requiring only a Windows PC (XP or later), .NET Framework 4.0, one USB port, and ≥22.2 MB free space. All I²C register changes-including VSEL, System1, and System2 registers-are volatile and reset on power cycle, enforcing intentional re-initialization per test iteration.

Key Specifications

Availability

EVKT-8843 is available at Aetrix Electronics and suitable for USB-C PD accessory development, battery-powered IoT node power validation, and compact industrial sensor module design requiring stable component supply and repeatable lab characterization.

Supply support for EVKT-8843 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, with core expertise in integrated DC-DC converters, LED drivers, and motor drivers for consumer, computing, and industrial markets.

The EVKT-8843 belongs to MPS's digital power evaluation platform family, designed specifically to accelerate adoption of I²C-configurable buck regulators like the MP8843 in space-constrained, dynamically adjustable power applications.

FAQ

Does EVKT-8843 support permanent configuration storage?

No. The MP8843 does not include non-volatile memory. All I²C register settings-including output voltage, switching frequency, and operating mode-are lost when input power is removed. Each evaluation session requires re-initialization via the MPS GUI, ensuring consistent baseline conditions across tests.

What is the role of the EVKT-USBI2C-02 in this kit?

The EVKT-USBI2C-02 is a dedicated USB-to-I²C bridge that translates USB commands from the MPS GUI into I²C transactions sent to the MP8843GG on the EV8843-G-00A board. It uses Silicon Labs' USBXpress driver and supports both I²C and PMBus protocols for register-level interaction.

Can EVKT-8843 be used with Linux or macOS?

No. The official MPS I²C GUI software is Windows-only and requires .NET Framework 4.0. No Linux or macOS drivers or GUI versions are provided by MPS. Cross-platform use would require custom I²C host implementation and register map interpretation.

Is the EV8843-G-00A board populated with the MP8843GG IC?

Yes. The EV8843-G-00A evaluation board is fully assembled and tested with the MP8843GG in a 12-pin QFN package. Input (VIN), output (VOUT), ground (GND), and I²C (SCL/SDA) terminals are accessible via labeled test points and screw terminals for direct probing and load connection.

What protection features can be monitored via the GUI?

The GUI displays real-time status bits for over-temperature (OT), input undervoltage lockout (UVLO), input overvoltage (VIN OVP), output overvoltage (VOUT OVP), power-good (PG), and thermal warning (OTW). These are read directly from the MP8843's status registers and reflect actual silicon-level fault conditions.

How do I resolve "EVB is Disconnected" error in the GUI?

This indicates no I²C communication between the EVKT-USBI2C-02 and EV8843-G-00A. Verify SCL/SDA/GND ribbon cable connections, confirm correct USBXpress driver installation (check Device Manager under USB controllers), ensure 2.5–6V input is applied to VIN/GND, and restart the GUI after reconnecting hardware.