Monolithic Power Systems Inc. MEZDPD3603A-85C2

Overview

mEZDPD3603A-85C2 from Monolithic Power Systems is a fully integrated, programmable 36V-input DC/DC power supply module delivering up to 3A continuous output current with user-configurable 0.6–12V output voltage, I²C-based parameter programming (OTP + RAM), and built-in EN/PG/FT/SYNC control signals. It operates across –40°C to +85°C and meets EN55022 Class B emissions in standard DIP package.

For engineers reviewing the mEZDPD3603A-85C2 datasheet, mEZDPD3603A-85C2 pinout, mEZDPD3603A-85C2 application, or mEZDPD3603A-85C2 equivalent, this module supports rapid bench evaluation via USB-to-I²C interface, real-time register tuning, one-time OTP configuration for production, and thermal-aware layout with integrated LDO (VCC) and fault signaling.

Technical Context

The mEZDPD3603A-85C2 integrates a synchronous buck controller, power MOSFETs, compensation network, and internal 5V LDO (VCC) into a single surface-mount DIP module. Its I²C interface enables full runtime configuration of output voltage, current limit, switching frequency (500–800 kHz), and protection thresholds.

It implements hiccup-mode short-circuit protection, over-temperature shutdown at 175°C, and power-good (PG) and fault (FT) open-drain status outputs. Input voltage range is 4.5–36V, with ±1% output voltage accuracy and ≤30mV peak-to-peak ripple at 5V/3A full load.

Key Specifications

Pinout & Package

Package: Standard DIP module, 16 mm × 23 mm × 6.5 mm, surface-mount with exposed thermal pad on bottom (non-soldered). Designed for through-hole or SMT assembly with four-layer PCB layout guidance.

Availability

mEZDPD3603A-85C2 is available at Aetrix Electronics and suitable for industrial automation controllers, programmable logic controllers (PLCs), and test equipment requiring stable component supply, field-reconfigurable power rails, and EN55022-compliant operation.

Supply support for mEZDPD3603A-85C2 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, computing, automotive, and telecom applications.

The mEZD family delivers turnkey, programmable DC/DC solutions targeting rapid prototyping and production-ready power subsystems-reducing design cycle time while maintaining flexibility across voltage, current, and protection requirements.

FAQ

What is the difference between OTP and RAM programming modes?

OTP (One-Time Programmable) ROM stores configuration permanently (e.g., final production settings) and requires 8–36 V input to program; writing causes module reset. RAM mode allows unlimited real-time register writes via I²C for development and dynamic adjustment without reprogramming OTP.

Can mEZDPD3603A-85C2 operate without external I²C communication?

Yes. The module ships pre-programmed with default 5 V output and 3 A current limit. It functions autonomously after power-up with EN high, requiring no I²C connection for basic operation-only needed for customization or monitoring.

How is thermal performance managed in the DIP package?

The module uses internal copper thermal planes and an exposed bottom pad (mechanically grounded, not electrically connected) to dissipate heat. Layout guidelines specify four-layer PCBs, wide GND/VIN traces, and multiple vias to inner ground layers for ≤25°C case rise at full load.

Does VCC supply power to external circuitry?

Yes. Pin 10 (VCC) provides a regulated 5 V output capable of sourcing up to 50 mA. It is intended for biasing external analog components (e.g., sensors, ADC references) or logic, eliminating need for a separate LDO in many systems.

What EN/PG/FT timing behavior occurs during startup?

EN high initiates soft-start; PG asserts ~1 ms after VOUT reaches ±5% of target and remains stable. FT goes low only during faults (SCP, OTP). All three signals are open-drain and require external pull-ups to VCC or system logic rail.

Is EN55022 Class B compliance board-dependent?

Yes. Compliance is achieved only when using the recommended input filter (including FB1 bead and CIN/COUT values) and following the specified 4-layer layout with ground plane integrity, as validated in the EVmEZDPD3603A-00A reference design.