Monolithic Power Systems Inc. MEZDPD3603A-84DC

Overview

mEZDPD3603A-84DC 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, operating from a 4.5V–36V input range. It integrates a synchronous buck controller, power MOSFETs, compensation, and I²C interface in a standard DIP package (16×23×6.5 mm), designed for rapid evaluation and embedded power rail customization in industrial control and test equipment.

For engineers reviewing the mEZDPD3603A-84DC datasheet, mEZDPD3603A-84DC pinout, mEZDPD3603A-84DC application, or mEZDPD3603A-84DC equivalent, this module supports real-time configuration of output voltage, current limit, switching frequency, and protection thresholds via GUI-driven I²C programming - eliminating manual resistor selection and enabling iterative bench validation.

Technical Context

The mEZDPD3603A-84DC implements a synchronous buck topology with internal high- and low-side MOSFETs, supporting programmable switching frequencies from 300 kHz to 1.2 MHz. Its integrated 5V LDO (VCC pin) powers internal circuitry and external logic, while dual GND pins ensure low-impedance return paths for power and signal domains.

It features hiccup-mode short-circuit protection, over-temperature shutdown at 175°C, and power-good (PG) and fault (FT) open-drain status outputs. The module uses one-time programmable (OTP) memory for persistent configuration storage and volatile RAM registers for unlimited runtime tuning via SDA/SCL.

Key Specifications

Pinout & Package

Package: Standard DIP (Dual In-line Package), 16-pin, 16 mm × 23 mm × 6.5 mm height, with exposed thermal pad on bottom (not electrically connected). Pin pitch: 2.54 mm.

Availability

mEZDPD3603A-84DC is available at Aetrix Electronics and suitable for industrial automation controllers, programmable logic controllers (PLCs), and automated test equipment (ATE) requiring stable component supply, rapid prototyping capability, and field-configurable power rails.

Supply support for mEZDPD3603A-84DC 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 California and serving global industrial, automotive, and computing markets since 1997.

The mEZDPD3603A belongs to MPS's mEZ® programmable power module family, engineered to replace discrete DC/DC designs with pre-validated, GUI-configurable solutions that accelerate time-to-power in embedded and instrumentation applications.

FAQ

What is the difference between OTP and RAM programming on the mEZDPD3603A-84DC?

OTP (One-Time Programmable) memory stores configuration permanently - writing requires 8–36 V input and causes a full restart; only one write is allowed. RAM registers allow unlimited read/write cycles at runtime via I²C for dynamic tuning, but settings are lost on power cycle unless saved to OTP.

Can the mEZDPD3603A-84DC operate without external I²C communication?

Yes - it ships pre-programmed (e.g., mEZDPD3603A-0001 default: 5 V / 3 A). Standalone operation requires only VIN, EN, and proper input/output capacitors. I²C is optional for reconfiguration, monitoring, or multi-rail coordination.

What is the purpose of the dual GND pins (Pins 3 and 8)?

Pin 3 serves as the main power ground return path for high-current loops (VIN, VOUT, SW), minimizing noise coupling. Pin 8 provides a dedicated reference ground for analog and digital control circuitry (EN, PG, FT, SDA, SCL), improving signal integrity and regulation accuracy.

Does the mEZDPD3603A-84DC require external compensation components?

No - all compensation is implemented internally. The module includes adaptive loop compensation optimized for its integrated power stage and recommended output capacitor values (e.g., 22 µF ×2 for 5 V output), eliminating external RC networks.

How is over-current protection implemented?

Over-current protection operates in hiccup mode: upon current limit violation, the device shuts down, waits ~500 ms, then attempts auto-restart. This prevents thermal runaway during sustained overload or short-circuit conditions while maintaining system safety.

What EN55022 compliance level does the mEZDPD3603A-84DC meet?

The module meets EN55022 Class B conducted and radiated emissions limits when used with the recommended input filter components (including FB1 ferrite bead and CIN/COUT values) and adhering to the provided PCB layout guidelines - no additional shielding required.