Monolithic Power Systems Inc. MEZDPD3603A-84D1

Overview

mEZDPD3603A-84D1 from Monolithic Power Systems is a fully integrated, programmable DC/DC power supply module delivering up to 3A continuous output current with adjustable output voltage from 0.6V to 12V. It operates from a 4.5V–36V input, features I²C-based configuration via SDA/SCL pins, includes power-good (PG) and fault (FT) indicators, and is housed in a standard DIP package (16×23×6.5 mm). It is used in industrial control systems requiring field-programmable, compact, high-efficiency power conversion.

For engineers reviewing the mEZDPD3603A-84D1 datasheet, mEZDPD3603A-84D1 pinout, mEZDPD3603A-84D1 application, or mEZDPD3603A-84D1 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, and confirmed alternatives - all derived from Monolithic Power's official Rev. 1.0 documentation and evaluation kit materials.

Technical Context

The mEZDPD3603A-84D1 integrates a synchronous buck controller, power MOSFETs, compensation network, and internal 5V LDO (VCC) into a single surface-mount module. Its programmability spans output voltage, current limit, switching frequency (default 500 kHz), and protection thresholds - all stored in one-time-programmable (OTP) memory or volatile RAM registers.

It supports I²C address selection via external resistor (R2), implements hiccup-mode short-circuit protection, thermal shutdown at 175°C, and meets EN55022 Class B conducted/radiated emissions when used with recommended input filtering. Output regulation accuracy is ±1% over line, load, and temperature.

Key Specifications

Pinout & Package

Package: Standard DIP module, 16 mm × 23 mm × 6.5 mm, with 12 exposed terminals on bottom edge and 2 ground pads (Pins 3 & 8).

Key Features

Applications

Availability

mEZDPD3603A-84D1 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, factory automation HMIs, test & measurement equipment, and programmable logic controller backplanes requiring stable component supply, field-programmable flexibility, and long-term lifecycle support.

Supply support for mEZDPD3603A-84D1 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, headquartered in Kirkland, WA, with global design and support operations.

The mEZDPD3603A belongs to MPS's mEZ® programmable power module family, engineered for rapid prototyping and flexible deployment in industrial, test, and automation systems where fixed-output DC/DC converters lack adaptability.

FAQ

What is the difference between mEZDPD3603A-84D1 and mEZDPD3603A-0001?

mEZDPD3603A-84D1 is a factory-programmed variant with specific OTP settings - likely configured for 5V/3A output, 500 kHz switching, and default I²C address 21h. In contrast, mEZDPD3603A-0001 ships with identical hardware but uses the default factory configuration defined in MPS documentation, allowing user reprogramming before OTP lock.

Can mEZDPD3603A-84D1 be reprogrammed after initial OTP programming?

No. The OTP (one-time programmable) memory is permanently written during final configuration. While RAM registers support unlimited runtime rewrites, any changes made after OTP programming are lost on power cycle unless reprogrammed via I²C before power-down - but the OTP values remain immutable.

Does mEZDPD3603A-84D1 require external components to operate?

Yes. Minimum required external components include a 4.7 µF input capacitor (CIN), 22 µF output capacitor (COUT), and optional input EMI filter (bead + capacitor). The module integrates power MOSFETs, inductor, and compensation - eliminating need for discrete magnetics or loop compensation design.

How is thermal performance managed in mEZDPD3603A-84D1?

Thermal management relies on PCB copper area: the module's exposed ground pads (Pins 3 & 8) must connect to ≥250 mm² internal or bottom-layer ground plane. At 3A/12V output, case temperature rise is ≤60°C above ambient with 200 LFM airflow - verified per typical performance curves in Rev. 1.0 datasheet.

Is mEZDPD3603A-84D1 compliant with EN55022 Class B emissions?

Yes - when used with the recommended input filter (10 µH inductor + 4.7 µF ceramic + ferrite bead FB1 as shown in Figure 7 of Rev. 1.0), the module meets EN55022 Class B conducted and radiated emission limits without additional shielding or enclosure modifications.

What I²C address does mEZDPD3603A-84D1 use by default?

The default I²C address is 0x21 (33 decimal), corresponding to ADD pin grounded (R2 = 0 kΩ). This matches the "21h" entry in the address table on page 6 of the Rev. 1.0 datasheet and is consistent with mEZDPD3603A-0001 baseline configuration.

Can SYNC pin be left unconnected?

Yes. If synchronization is not required, SYNC may be left floating or tied to GND. Leaving it unconnected disables clock synchronization, and the module operates at its internally generated switching frequency (500 kHz typical). No pull-up or pull-down is required.