Monolithic Power Systems Inc. MEZDPD3603A-858F

Overview

mEZDPD3603A-858F 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-858F datasheet, mEZDPD3603A-858F pinout, mEZDPD3603A-858F application, or mEZDPD3603A-858F equivalent, this page delivers verified electrical parameters, terminal functions, thermal performance data, I²C address configuration options, and real-world evaluation kit integration guidance - all grounded in Monolithic Power's Rev. 1.0 documentation and official mEZ product specifications.

Technical Context

The mEZDPD3603A-858F implements a synchronous buck topology with an integrated MOSFET power stage and internal 5V LDO (VCC pin). Its programmable architecture supports one-time OTP programming for permanent configuration and unlimited RAM register writes for dynamic tuning during bench evaluation.

It supports I²C address selection via external resistor (R2) on ADD pin (I²C addresses 0x21–0x26), enables clock synchronization via SYNC input, and reports status through open-drain PG (power good) and FT (fault) outputs. Output voltage accuracy is ±1% (typ), with load/line regulation also specified at ±1% (typ) under defined test conditions.

Key Specifications

Pinout & Package

Package: Standard DIP module, 16 mm × 23 mm × 6.5 mm - surface-mount compatible with through-hole footprint; includes integrated inductor and passive components.

Key Features

Applications

Availability

mEZDPD3603A-858F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, test & measurement equipment, and factory automation sensor nodes requiring stable component supply, field-programmable flexibility, and EN55022 Class B compliance.

Supply support for mEZDPD3603A-858F 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 mEZ® family delivers fully integrated, programmable DC/DC power modules targeting rapid prototyping and production deployment in industrial, test equipment, and automation applications where board space, time-to-market, and configuration agility are critical.

FAQ

What is the difference between mEZDPD3603A-858F and mEZDPD3603A-0001?

mEZDPD3603A-858F is a non-programmed (NP) variant - its output voltage, current limit, and switching frequency remain unconfigured at shipment and must be set via I²C before first use. In contrast, mEZDPD3603A-0001 ships pre-programmed to 5V/3A/500kHz. Both share identical hardware, pinout, and thermal characteristics.

Can mEZDPD3603A-858F be reprogrammed after OTP programming?

No - the OTP (one-time programmable) memory can only be written once, permanently locking parameters like output voltage and current limit. However, RAM registers (e.g., soft-start time, frequency trim) support unlimited rewrites via I²C for lab evaluation and dynamic tuning without affecting OTP settings.

What is the purpose of the ADD pin, and how is it used?

The ADD pin sets the I²C slave address by connecting it to GND through a resistor (0kΩ to 137.5kΩ). This allows up to six mEZDPD3603A modules to coexist on the same I²C bus with unique addresses (0x21–0x26), enabling coordinated configuration in multi-rail systems.

Does mEZDPD3603A-858F require external compensation components?

No - the module integrates full Type-II/III compensation circuitry internally. No external compensation network is needed; users configure compensation parameters (e.g., bandwidth, phase margin) via I²C using the Virtual Bench Pro GUI based on their specific output capacitor and load conditions.

How does the PG (Power Good) signal behave during startup?

The PG pin asserts high only after V_OUT reaches and remains within ±10% of its programmed value for at least 1ms. It remains high during normal operation and pulls low during faults (e.g., overcurrent, thermal shutdown) or input undervoltage, providing reliable system power sequencing feedback.

What is the maximum allowable case temperature rise at full load?

At 24V input and 5V/3A output, the typical case temperature rise is ≤60°C above ambient (measured per Figure 4 in Rev. 1.0 datasheet). With adequate copper area and airflow, the module sustains full load continuously within its −40°C to +85°C ambient rating.

Is an external input filter mandatory for EN55022 Class B compliance?

Yes - the recommended filter (10µH inductor + 4.7µF ceramic + 30Ω bead) on the VIN rail is required to meet EN55022 Class B conducted/radiated emissions. Omitting it may cause failure in pre-compliance testing, especially in 30–300MHz bands.