Monolithic Power Systems Inc. MEZDPD4506A-853A

Overview

EVmEZDPD4506A-00A from Monolithic Power Systems is a programmable 45V input, 6A buck DC/DC evaluation board based on the mEZDPD4506A digital power module. It supports adjustable output voltage from 0.6V to 22V (default 3.3V), operates at 600kHz switching frequency, delivers up to 94.4% peak efficiency at 24V_IN/12V_OUT, and enables real-time configuration via I²C using Virtual Bench Pro 2.2 GUI for industrial power supply validation.

For engineers reviewing the EVmEZDPD4506A-00A datasheet, EVmEZDPD4506A-00A pinout, EVmEZDPD4506A-00A application, or EVmEZDPD4506A-00A equivalent, this board provides full digital control access-including output voltage, current limit, switching frequency, protection modes, and loop compensation-via USB-to-I²C interface (EVKT-USBI2C-02) and preloaded GUI on included Tdrive-mEZDPD4506A USB stick.

Technical Context

The EVmEZDPD4506A-00A implements a complete evaluation platform for the mEZDPD4506A digital PMBus-compliant buck module, integrating all required input/output filtering, thermal management, and I²C signal conditioning. Its 64mm × 64mm PCB layout includes dual 22µF output capacitors, eight 10µF input bulk caps, and a 4.7µH shielded inductor with 7A saturation current.

It supports full-feature digital power management: programmable soft-start, over-current (SCP), over-voltage (OVP), under-voltage (UVP), and thermal shutdown protections; configurable load-line droop; and real-time telemetry (V_OUT, I_OUT, temperature, status flags) via PMBus v1.3 commands.

Key Specifications

Availability

EVmEZDPD4506A-00A is available at Aetrix Electronics and suitable for industrial automation power validation, telecom base station auxiliary supply design, and FPGA/ASIC core voltage characterization requiring stable component supply and full digital configurability.

Supply support for EVmEZDPD4506A-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 industrial, computing, automotive, and cloud infrastructure applications.

The EVmEZDPD4506A-00A belongs to MPS's mEZ™ digital power evaluation platform family, designed to accelerate adoption of programmable DC/DC converters by providing turnkey hardware, GUI software, and register-level documentation for rapid power architecture prototyping.

FAQ

What is the required interface hardware to configure the EVmEZDPD4506A-00A?

The board requires the EVKT-USBI2C-02 USB-to-I²C dongle, included in the PKT-mEZDPD4506A kit. This device connects via USB-A to host PC and interfaces to the board's SDA/SCL pins using a 10-pin ribbon cable. No external level-shifting or pull-up resistors are needed-the board integrates 4.7kΩ I²C pull-ups.

Does the EVmEZDPD4506A-00A support PMBus commands beyond basic voltage setting?

Yes-it fully implements PMBus v1.3 command set including READ_VIN, READ_IOUT, READ_TEMPERATURE_1, OPERATION, ON_OFF_CONFIG, VOUT_COMMAND, VOUT_MAX, IOUT_OC_FAULT_LIMIT, and STORE_DEFAULT_ALL. All registers are accessible via Virtual Bench Pro 2.2 or custom scripts using standard PMBus packet format.

Can the board operate without the mEZDPD4506A module installed?

No-the EVmEZDPD4506A-00A has no onboard power conversion circuitry. It is a passive carrier board with socketed footprint, filter components, and I²C routing. Operation requires manual insertion of the mEZDPD4506A-0000 module (included) or compatible programmed variant.

What is the default output voltage and how is it changed?

The mEZDPD4506A module ships with 3.3V default output. Voltage is reprogrammed digitally via Virtual Bench Pro 2.2 GUI or direct PMBus WRITE_VOUT_COMMAND (0x21) command. The GUI provides slider-based adjustment from 0.6V to 22V in 10mV increments with immediate hardware update and verification.

Is thermal performance data available for different output configurations?

Yes-Figure 4 in the reference document shows case temperature rise vs. load current for VIN=24V/VOUT=5V (≤110°C at 6A) and VIN=12V/VOUT=1.2V (≤95°C at 6A). Board uses 2oz copper layers, thermal vias under the module, and exposed pad soldering to minimize junction-to-ambient resistance.

What protection features are implemented and how are they triggered?

The board inherits mEZDPD4506A's integrated protections: over-current (SCP) triggers within 200ms at >110% rated current; over-voltage (OVP) trips at >115% VOUT; under-voltage (UVP) asserts below 85% VOUT; thermal shutdown activates at 150°C junction. All faults disable PWM and assert PG pin low; recovery is automatic after fault removal and timeout.