Monolithic Power Systems Inc. MEZDPD4506A-851A

Overview

MEZDPD4506A-851A from Monolithic Power Systems is an end-of-life evaluation board for the mEZDPD4506A programmable 45V input, 6A buck DC/DC power module. It supports output voltage programming 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 digital configuration via I²C using Virtual Bench Pro 2.2 GUI - used for lab validation of industrial and embedded power rails.

For engineers reviewing the MEZDPD4506A-851A datasheet, MEZDPD4506A-851A pinout, MEZDPD4506A-851A application, or MEZDPD4506A-851A equivalent, this page provides verified technical context, key specifications, supply chain availability, manufacturer background, and functional FAQs - all grounded in the official EVmEZDPD4506A-00A Rev. 1.0 documentation.

Technical Context

The MEZDPD4506A-851A is a hardware platform designed exclusively to host and evaluate the mEZDPD4506A module - a digitally programmable, integrated buck converter with nonvolatile memory. It implements full I²C-based control of output voltage, current limit, switching frequency, soft-start, and protection modes including SCP, OVP, UVP, and thermal shutdown.

Board-level features include dual 22µF output capacitors (configurable per V_OUT), 4.7µH power inductor, VIN/VOUT sense routing, EMI filtering options, and dedicated SDA/SCL headers compatible with EVKT-USBI2C-02. No onboard regulation or microcontroller is present - all intelligence resides in the mEZDPD4506A module itself.

Key Specifications

Availability

MEZDPD4506A-851A is available at Aetrix Electronics and suitable for industrial automation controllers, test equipment power subsystems, and embedded computing power validation requiring stable component supply during legacy design support and obsolescence transition phases.

Supply support for MEZDPD4506A-851A 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 in the US, China, and Taiwan, and global distribution since 1997.

The mEZDPD series targets engineers needing digitally configurable, drop-in-ready DC/DC solutions for rapid prototyping and production power delivery - emphasizing programmability, protection robustness, and GUI-driven validation over discrete controller + external FET designs.

FAQ

Is MEZDPD4506A-851A a standalone power supply?

No. MEZDPD4506A-851A is an evaluation board that requires insertion of the mEZDPD4506A module (sold separately) into its socket. It provides no power conversion capability without the module. The board adds I²C connectivity, sensing, filtering, and mechanical mounting - but all regulation and control logic reside in the module.

What software is required to configure the board?

Virtual Bench Pro 2.2 GUI is mandatory. It runs on Windows, auto-detects the mEZDPD4506A module via EVKT-USBI2C-02 dongle, and provides sliders/buttons for adjusting VOUT, I_LIM, f_SW, soft-start time, and protection thresholds - with register-level visibility and save/load profile functionality.

Can output capacitance be modified for different voltages?

Yes. The BOM specifies conditional capacitor placement: C2B and C1C are optional based on VOUT. For VOUT < 3.3V, only C2A is populated; for VOUT = 5V, both C2A and C2B are used; for VOUT = 12V, C1C (100µF e-cap) must be added to ensure stability and transient response.

Does the board support analog feedback or only digital control?

Only digital control via I²C. The mEZDPD4506A uses internal DACs and digital PID compensation - no external resistor divider or compensation network is accessible or required. Feedback is fully embedded and programmable through the GUI or register writes.

Is thermal performance documented for continuous 6A operation?

Yes. Figure 4 in the reference document shows case temperature rise ≤ 80°C at 6A load with VIN=24V/VOUT=5V, confirming adequate copper pour and thermal vias on the 64mm × 64mm board. Derating is recommended above 70°C ambient without forced airflow.

What happens when the board reaches end-of-life status?

MEZDPD4506A-851A is marked END OF LIFE per Rev. 1.0 documentation. No new production is planned. Aetrix Electronics maintains limited legacy stock for last-time buys and offers engineering support for migration paths to active MPS evaluation platforms such as the mEZDPD4506A-0000 module with updated GUI tooling.