Monolithic Power Systems Inc. MEZDPD3603A-84D5

Overview

mEZDPD3603A-84D5 from Monolithic Power Systems is a fully integrated, programmable DC/DC power supply module delivering up to 3A continuous output current with adjustable 0.6–12V output voltage, operating from 4.5–36V input. 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-84D5 datasheet, mEZDPD3603A-84D5 pinout, mEZDPD3603A-84D5 application, or mEZDPD3603A-84D5 equivalent, this module supports one-time OTP programming of output voltage, current limit, switching frequency, and protection thresholds - enabling configuration without external components or layout changes during bench validation.

Technical Context

The mEZDPD3603A-84D5 implements a synchronous buck topology with internal high- and low-side MOSFETs, supporting programmable switching frequencies from 300 kHz to 1.2 MHz via I²C. Its integrated 5V LDO (VCC pin) powers internal circuitry and can supply auxiliary loads up to 100 mA.

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 ADD pin enables I²C address selection across six options (0x21–0x26), allowing multi-module synchronization on shared buses.

Key Specifications

Availability

mEZDPD3603A-84D5 is available at Aetrix Electronics and suitable for industrial PLCs, automated test equipment (ATE), and programmable logic controllers requiring stable component supply, fast prototyping cycles, and field-configurable power rails.

Supply support for mEZDPD3603A-84D5 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 mEZDPD series targets rapid power system development - integrating control, power stage, and digital configurability into compact, pre-validated modules to eliminate discrete buck design complexity and qualification delays.

FAQ

What is the difference between OTP and RAM programming modes?

OTP (One-Time Programmable) ROM stores permanent settings like output voltage and current limit, surviving power cycles and requiring 8–36 V to program. RAM mode allows unlimited register writes for real-time tuning during evaluation, but settings reset on power loss unless saved to OTP.

Can mEZDPD3603A-84D5 be used without the GUI or USB-I²C adapter?

Yes - it operates with default factory settings (5 V, 3 A) immediately upon applying VIN and EN high. The GUI and EVKT-USBI2C-02 are optional for reconfiguration; all I²C commands can be implemented via custom host firmware using SCL/SDA pins.

Does the module require external output capacitors?

Yes - minimum 22 µF ceramic output capacitance is required per the datasheet. For 5 V output, two 22 µF X7R 25 V capacitors in parallel are recommended to meet ripple and transient response specs; layout must minimize loop inductance.

How is thermal performance managed in the DIP package?

The 16×23×6.5 mm DIP package uses internal copper planes and exposed thermal pads on the bottom layer. Recommended PCB design includes ≥4 thermal vias under the module tied to an internal ground plane, achieving ≤40°C case rise at full load with 2-layer 2 oz copper.

What protection features are implemented and how do they behave?

It includes hiccup-mode short-circuit protection (auto-retry after fault clears), over-temperature shutdown at 175°C (latches off until cool-down), and PG/FT open-drain indicators. No external components are needed - all protections are internally sensed and actuated.

Is SYNC pin mandatory for operation?

No - SYNC is optional. When left unconnected or pulled low, the module operates at its internally set switching frequency. When driven with an external clock (300–1200 kHz), it synchronizes to that source, eliminating beat frequencies in multi-rail systems.

What is the role of the VCC pin and can it power external circuitry?

VCC is the 5 V output of an internal LDO powered from VIN. It supplies internal logic and can source up to 100 mA for external biasing (e.g., level shifters, ADC references), provided total load stays within specified current and thermal limits.