Monolithic Power Systems Inc. MEZDPD3603A-85C9

Overview

mEZDPD3603A-85C9 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, and integrates internal compensation, fault protection (hiccup-mode SCP), and power-good signaling. It is deployed in industrial control systems requiring field-programmable, compact, and EN55022 Class B-compliant power conversion.

For engineers reviewing the mEZDPD3603A-85C9 datasheet, mEZDPD3603A-85C9 pinout, mEZDPD3603A-85C9 application, or mEZDPD3603A-85C9 equivalent, this module supports rapid bench evaluation using Virtual Bench Pro GUI, OTP/RAM programming of output voltage, current limit, switching frequency, and compensation-enabling design iteration without hardware changes.

Technical Context

The mEZDPD3603A-85C9 implements a synchronous buck topology with integrated high-side and low-side MOSFETs, internal 5V LDO (VCC), and digitally configurable control loop parameters. Its I²C interface enables real-time register access and one-time OTP programming for production firmware lock-in.

It supports multiple operating modes including forced PWM, auto PFM/PWM, and synchronization via SYNC pin. Fault handling includes over-temperature shutdown (175°C default), hiccup-mode short-circuit protection, and open-drain PG/FT signals for system-level monitoring and sequencing.

Key Specifications

Pinout & Package

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

Key Features

Applications

Availability

mEZDPD3603A-85C9 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, test & measurement equipment, factory automation sensors, and edge AI gateways requiring stable component supply, programmable flexibility, and EN55022 Class B compliance.

Supply support for mEZDPD3603A-85C9 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 for industrial, automotive, and computing applications.

The mEZDPD3603A belongs to MPS's mEZ® programmable power module family, designed to replace discrete DC/DC designs with pre-validated, software-configurable solutions that accelerate time-to-market for complex power architectures.

FAQ

What is the difference between OTP and RAM programming on the mEZDPD3603A-85C9?

OTP (one-time programmable) memory stores permanent configuration (output voltage, current limit, frequency) written once at 8–36V input; it survives power cycles and resets the device upon completion. RAM registers support unlimited read/write via I²C for prototyping and runtime adjustment but are volatile and reset on power loss unless copied to OTP.

Does the mEZDPD3603A-85C9 require external compensation components?

No. The device integrates digital compensation with programmable Type-II/III transfer functions. All compensation parameters-including gain, pole/zero locations, and bandwidth-are configured via I²C using the Virtual Bench Pro GUI; no external resistors or capacitors are needed.

Can multiple mEZDPD3603A-85C9 modules be synchronized to reduce EMI?

Yes. The SYNC pin accepts an external clock (300kHz–1.2MHz) to align switching edges across multiple modules. This reduces beat-frequency harmonics and lowers peak radiated emissions, especially critical in dense multi-rail systems like AI gateways or automated test equipment.

What is the role of the ADD pin, and how is it configured?

The ADD pin sets the I²C slave address by connecting it to GND through a resistor (0kΩ to 137.5kΩ). Each resistance value maps to a unique 7-bit address (e.g., 0kΩ = 0x21), enabling up to six modules on a single I²C bus without address conflict or software remapping.

How does the mEZDPD3603A-85C9 handle over-temperature conditions?

It features integrated over-temperature protection (OTP) with a default trip threshold of 175°C. Upon detection, the device shuts down output and asserts the FT̅ pin. After cooling below hysteresis (~15°C below trip), it automatically recovers if EN remains high-no manual reset required.

Is the mEZDPD3603A-85C9 RoHS and REACH compliant?

Yes. As a Monolithic Power Systems product manufactured after 2018, the mEZDPD3603A-85C9 meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with full material declarations available upon request through MPS's compliance portal.

What layout guidelines are critical for thermal performance?

A 4-layer PCB with dedicated internal ground/power planes is recommended. Key practices include: (1) direct connection of GND pins to large copper pour with ≥6 thermal vias, (2) placing input/output capacitors within 3mm of respective pins, and (3) mounting the module over an exposed thermal pad tied to inner ground layers via array of vias.