Monolithic Power Systems Inc. EVM82504-BH-02A

Overview

EVM82504-BH-02A from Monolithic Power Systems is a 16V, quad-channel, scalable DC/DC power module evaluation board designed to demonstrate the MPM82504 - a 4V–16V input, 0.5V–3.3V adjustable output, 25A-per-channel PMBus-enabled power module. It supports parallel operation modes delivering up to 100A total output, features multi-phase constant-on-time (MCOT) control for ultra-fast transient response, and integrates a PMBus interface for digital configuration and telemetry.

For engineers reviewing the EVM82504-BH-02A datasheet, EVM82504-BH-02A pinout, EVM82504-BH-02A application, or EVM82504-BH-02A equivalent, this board enables rapid validation of high-current, multi-rail power delivery in server, AI accelerator, and telecom infrastructure designs - with real-time monitoring via Virtual Bench Pro 4.0 GUI and EVKT-USBI2C-02 interface.

Technical Context

The EVM82504-BH-02A implements four independent MPM82504GBH-0000 modules, each supporting 4V–16V input and 0.5V–3.3V programmable output at up to 25A. It supports five configurable parallel modes (A–E), enabling 4×25A, 2×50A, 75A+25A, or full 100A single-rail operation through hardware jumpers and resistor networks.

Each channel uses MPS's proprietary multi-phase constant-on-time (MCOT) control architecture, delivering <10µs load-step response with minimal external compensation. The board includes dedicated PMBus SCL/SDA headers, VOUT sense lines (VOSNSx_P/N), current-summing (ISUMx), enable (CTRLx), and power-good (PGx) signals - all routed for direct oscilloscope or host-controller access.

Key Specifications

Availability

EVM82504-BH-02A is available at Aetrix Electronics and suitable for high-density computing, AI training hardware, 5G baseband units, and industrial FPGA power systems requiring stable component supply and fast time-to-test validation.

Supply support for EVM82504-BH-02A 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 and modules, with design centers across the US, China, and Taiwan, and global distribution through authorized partners.

The EVM82504-BH-02A belongs to MPS's scalable power module evaluation platform family, engineered to accelerate adoption of digitally controlled, high-current DC/DC solutions in datacenter and edge-computing applications where layout efficiency and thermal predictability are critical.

FAQ

What is the primary function of the EVM82504-BH-02A?

This board is a hardware reference platform for evaluating the MPM82504GBH-0000 - a quad-channel, 25A-per-channel, PMBus-enabled power module. It enables engineers to validate voltage regulation accuracy, transient response, parallel scalability, thermal behavior, and digital control functionality before integrating into final PCB designs.

Which software tools are required to configure the board digitally?

The Virtual Bench Pro 4.0 GUI is mandatory for full PMBus interaction. It requires the EVKT-USBI2C-02 USB-to-PMBus adapter and a standard USB-A cable. The GUI provides real-time readout of VOUT, IOUT, temperature, and fault registers, plus write access to VOUT_COMMAND, switching frequency, phase shedding, and margining settings.

How do I change the output voltage on a specific channel?

VOUT can be adjusted either by modifying the external feedback resistor divider (using Equation R_LOWER = V_REF/(V_OUTx − V_REF) × R_UPPER) or digitally via PMBus: disable the channel, write GFB to VOUT_SCALE_LOOP, then write target VOUTx to VOUT_COMMAND. VREF defaults to 0.6V but is adjustable from 0.5V to 0.672V.

What are the physical requirements for enabling parallel operation modes?

Parallel modes require soldering tin jumpers between exposed output copper pads of designated channels (e.g., CH1//CH2 for Mode B), installing specified 0Ω resistors (R60–R65, R311, etc.), and setting the correct address resistors (R8/R11/R18). EN pins must be pulled low before power-up and re-enabled after configuration.

Does the board include thermal management provisions?

Yes - the PCB uses 2oz copper layers, internal thermal vias under each MPM82504 module, and large copper pours tied to GND and VIN planes. Test data shows junction temperatures remain within safe limits at 20A/channel without airflow; adding a 2m/s forced-air stream further reduces thermal rise by ~15°C per channel.

Can I use this board to evaluate dynamic load regulation?

Yes - it includes dedicated transient test points (Trans_Vg1/Trans_Vg2), MOSFET gate drive outputs, and a built-in pulse generator circuit. The documented 10A/µs step load test (with ≤±29 mV deviation) confirms suitability for validating VRM compliance in CPU/GPU/AI ASIC power delivery networks.