Monolithic Power Systems Inc. EVM81204-BC-00A

Overview

EVM81204-BC-00A from Monolithic Power Systems is an evaluation board for the MPM81204 quad-output step-down module, delivering dual 12A and dual 5A DC outputs with configurable switching frequencies (600/800/1000 kHz), four independent power-good signals, and full protection (OCP/OVP/OTP). It supports 6.5–16V input and preset output voltages of 1.8V, 3.3V, 5V, and 1.2V - optimized for telecom, server, and base station power architecture validation.

For engineers reviewing the EVM81204-BC-00A datasheet, EVM81204-BC-00A pinout, EVM81204-BC-00A application, or EVM81204-BC-00A equivalent, this board enables rapid characterization of multi-rail, high-current PMIC performance under real load transients, thermal stress, and sequencing requirements - with direct access to EN, FB, TRK/REF, PGOOD, and VOSNS terminals for system-level debugging.

Technical Context

The EVM81204-BC-00A implements the MPM81204's Adaptive Constant-On-Time (COT) control architecture, enabling ultra-fast transient response across all four channels without external compensation. Each channel operates independently with programmable soft-start, voltage tracking, and forced continuous conduction mode (FCCM) support.

It exposes all critical analog and digital interfaces: four dedicated EN pins for individual channel enable/disable, four FB pins for output voltage regulation, four TRK/REF pins for sequencing and margining, and four open-drain PGOOD signals synchronized to output regulation status - all mapped to accessible test points and screw terminals.

Key Specifications

Availability

EVM81204-BC-00A is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, 5G base station development, and multi-rail embedded system validation requiring stable component supply and repeatable lab evaluation.

Supply support for EVM81204-BC-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 power management ICs, with design expertise in integrated DC/DC modules, controllers, and power stages for demanding applications.

The EVM81204-BC-00A belongs to MPS's evaluation board product line, engineered specifically to accelerate adoption of their high-density, multi-output power modules in datacenter and communications infrastructure designs.

FAQ

What input voltage range is supported, and what happens outside that range?

The board accepts 6.5 V to 16 V DC input. Below 6.5 V, UVLO triggers and disables all outputs; above 16 V, internal OVP circuitry clamps operation and asserts PGOOD deassertion. Input overvoltage beyond 17 V risks permanent damage to the MPM81204 IC and input capacitors.

Can I reconfigure the output voltages, and how?

Yes - output voltages are set by feedback resistors (R12, R13, R14, R15, R16, R17, R20) and TRK/REF networks. Adjusting these resistors changes VOUT per channel; reference schematics and calculation formulas are provided in the MPM81204 datasheet Section 8.2.

How do I enable or disable individual outputs?

Each output has a dedicated EN pin (EN0–EN3) tied to JP1–JP4 jumpers. Removing a jumper pulls the corresponding EN pin low via a 0Ω resistor (R18/R19/R21), disabling that channel. Applying ≥1.2 V to ENx enables the channel with programmable soft-start.

What thermal management features does the board include?

The board uses 4-layer PCB construction with internal copper planes, thermal vias under the MPM81204 BGA, and exposed pad soldering to maximize heat transfer. Thermal derating curves (Fig. 6–7) show 100% load capability up to 60°C ambient with 200 LFM airflow.

Are the PGOOD signals active-high or open-drain, and how are they used?

All four PGOOD signals are open-drain, pulled up externally via onboard 10 kΩ resistors. They go low when their respective output is within ±10% regulation window. These signals can be wire-OR'd for system power sequencing or monitored individually via microcontroller GPIOs.

Does the board support output voltage tracking, and how is it implemented?

Yes - TRK/REF0–TRK/REF3 pins support both voltage tracking and remote sensing. When configured as tracking inputs, they synchronize startup/shutdown timing across rails; as REF inputs, they adjust output voltage via external DAC or resistor divider for margining tests.