Monolithic Power Systems Inc. MEZDPD3603A-84DF

Overview

mEZDPD3603A-84DF from Monolithic Power Systems is a fully integrated, programmable DC/DC power supply module delivering up to 3A continuous output current with adjustable 0.6V–12V output voltage, operating from 4.5V–36V input, housed in a standard DIP package (16×23×6.5 mm), and featuring I²C-based configuration via OTP and RAM registers for industrial power rail optimization.

For engineers reviewing the mEZDPD3603A-84DF datasheet, mEZDPD3603A-84DF pinout, mEZDPD3603A-84DF application, or mEZDPD3603A-84DF equivalent, this module supports rapid bench evaluation with GUI-driven parameter tuning-including output voltage, current limit, switching frequency, and compensation-enabling fast validation of custom power configurations without hardware changes.

Technical Context

The mEZDPD3603A-84DF integrates a synchronous buck controller, power MOSFETs, inductor, and input/output capacitors into a single surface-mount DIP module. It implements hiccup-mode short-circuit protection and thermal shutdown at 175°C, with internal 5V LDO (VCC) powering control circuitry independently of VOUT.

Configuration occurs over I²C using SDA/SCL pins, with address selection via external resistor (R2) and fault/power-good status signaled on FT and PG pins. The SYNC pin enables clock synchronization across multiple modules, while ADD sets I²C slave address-supporting multi-module systems with deterministic timing alignment.

Key Specifications

Pinout & Package

Package: Standard DIP module, 16 mm × 23 mm × 6.5 mm, with exposed thermal pad on bottom for PCB heat sinking.

Key Features

Applications

Availability

mEZDPD3603A-84DF is available at Aetrix Electronics and suitable for industrial automation, automotive camera systems, test equipment, and programmable lab supplies requiring stable component supply, guaranteed long-term availability, and full technical support for configuration and integration.

Supply support for mEZDPD3603A-84DF 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 integrated power modules for industrial, automotive, and computing applications.

The mEZD family delivers fully assembled, programmable DC/DC modules targeting rapid prototyping and production deployment where board space, thermal constraints, and time-to-market are critical design factors.

FAQ

What is the difference between OTP and RAM programming modes?

OTP (one-time programmable) memory stores configuration permanently-once written, it persists through power cycles and cannot be overwritten. RAM registers allow unlimited read/write access for runtime tuning, but settings are lost on power-down unless reloaded from OTP or host controller. Both modes coexist: OTP serves as boot configuration, RAM enables dynamic adaptation.

Does mEZDPD3603A-84DF require external compensation components?

No. All compensation is implemented internally and automatically adjusted based on programmed output voltage and current limit. The GUI modeling tool calculates optimal compensation values during configuration and writes them to internal registers-no external resistors or capacitors are needed for stability across the full 0.6V–12V range.

Can multiple mEZDPD3603A-84DF modules be synchronized to reduce EMI?

Yes. The SYNC pin accepts an external clock signal (500 kHz or 800 kHz) to align switching edges across multiple modules. Combined with ADD pin address selection, up to six modules can share one I²C bus while operating with phase-shifted or identical timing-reducing peak input current and conducted EMI by up to 12 dB.

What is the minimum input voltage required to program the OTP?

The VIN range for OTP programming is strictly 8V–36V. Below 8V, the internal charge pump cannot reliably write to the OTP memory. During OTP write, the module shuts down momentarily and restarts with the new configuration-this behavior is documented in the mEZDPD3603A Rev. 1.0 datasheet Section 4.1.

How does the PG pin behave during startup and fault conditions?

The PG pin asserts high after VOUT reaches and remains within ±5% of the programmed value for ≥10 ms. It de-asserts low within 1 µs during overcurrent, overtemperature, or input UVLO. PG is open-drain and requires a 10 kΩ pull-up to VCC or system rail-no external logic buffering is needed for MCU GPIO interfacing.

Is the mEZDPD3603A-84DF RoHS and REACH compliant?

Yes. The mEZDPD3603A-84DF conforms to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Certificate of Compliance and material declarations are available upon request from Monolithic Power Systems' quality portal with part-specific lot traceability.

What layout guidelines are critical for thermal performance?

A four-layer PCB with internal ground and power planes is recommended. The module's exposed thermal pad must connect to a solid copper area ≥200 mm² on the bottom layer, linked via ≥8 thermal vias (0.3 mm diameter) to internal ground. VIN and VOUT traces should be ≥2 mm wide and ≤10 mm long to limit resistive loss and inductance.