Monolithic Power Systems Inc. EVM54322-PB-00A

Overview

EVM54322-PB-00A from Monolithic Power Systems is an I²C-enabled evaluation board for the MPM54322GPB-0000 dual 3A power module, supporting independent or paralleled 6A operation with active current balancing and integrated 500mA LDO. It operates from 3V–16V input, delivers up to 1.2V at 3A per channel (independent mode), and features constant-on-time control for fast transient response in FPGA, ASIC, and multi-rail processor power applications.

For engineers reviewing the EVM54322-PB-00A datasheet, EVM54322-PB-00A pinout, EVM54322-PB-00A application, or EVM54322-PB-00A equivalent, this board enables rapid validation of dual-output DC/DC performance, I²C programmability, thermal behavior under load, and LDO noise suppression - critical for high-density point-of-load designs requiring tight voltage regulation and dynamic current sharing.

Technical Context

The EVM54322-PB-00A implements the MPM54322's full feature set: dual synchronous buck topology with COT control, MODE-selectable independent/paralleled operation, and dedicated LDO output with ultra-low noise. Its 10-pin I²C interface supports real-time telemetry (voltage, current, temperature) and configuration of soft-start, switching frequency, and fault thresholds.

Board-level design includes four 22µF input capacitors, dual 2×22µF output banks per rail, and optimized thermal layout with exposed GND pads beneath the ECLGA-34 package. The 8cm × 8cm PCB supports direct load connection via screw terminals and measurement access to all critical nodes including SW1/SW2, FB1P/FB1N, and LDOIN/LDO.

Key Specifications

Availability

EVM54322-PB-00A is available at Aetrix Electronics and suitable for FPGA power sequencing, multi-core SoC evaluation, and industrial PLC power subsystem validation requiring stable component supply, repeatable test conditions, and production-ready layout reference.

Supply support for EVM54322-PB-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 and modules for computing, telecom, automotive, and industrial markets.

The MPM54322 product line delivers integrated, thermally optimized power modules targeting space-constrained, high-efficiency point-of-load applications where reliability, low EMI, and digital configurability are essential.

FAQ

What is the maximum supported input voltage for the EVM54322-PB-00A?

The evaluation board supports up to 16V input voltage, matching the absolute maximum rating of the MPM54322GPB-0000 power module. Exceeding this voltage risks permanent damage to the IC and board components, as confirmed in the official MPS documentation and schematic labeling.

Can the two outputs be used independently with different voltages?

Yes - the EVM54322-PB-00A supports independent operation with separate feedback resistors (RF1A/B for VOUT1, RF2A/B for VOUT2), enabling distinct output voltages such as 1.2V and 1.8V simultaneously, as verified in the schematic and quick start guide.

Does the board provide access to the MPM54322's I²C telemetry registers?

Yes - the 10-pin ribbon cable header (SCL/SDA/GND pins labeled on schematic) provides direct access to all I²C registers, including input/output voltage, current, temperature, and fault status, enabling host MCU or PMBus controller integration.

How is current balancing achieved when operating in paralleled mode?

Current balancing is implemented internally by the MPM54322 via active sensing and phase synchronization - no external components required. The board enables this mode by shorting VOUT1 and VOUT2 and setting MODE pins accordingly, as specified in the performance summary notes.

Is the integrated LDO output configurable for different voltages?

No - the LDO output is fixed at 1.2V per the MPM54322 datasheet and board schematic (LDO pin connected to internal regulator). It delivers up to 500mA with ultra-low noise, intended for powering analog subsystems or reference circuits without external adjustment.

What is the recommended output capacitance for stable operation at 6A?

For 6A paralleled operation, the board uses 2×22µF ceramic capacitors per output rail (C2A–C2D), totaling 44µF per rail. This value ensures <4.6mV ripple at full load and meets the stability requirements defined in the MPM54322 datasheet for 1MHz switching.