Monolithic Power Systems Inc. MEZD41501A-A

Overview

MEZD41501A-A from Monolithic Power Systems is a ready-to-use, fixed-frequency boost DC-DC power module integrating MP3429 controller, 1.5µH inductor, and full passive BOM. It delivers 5V at 1A from 2.7–4.2V input with ±2.2% output voltage accuracy, 17mV typical ripple, and 97.5% peak efficiency-designed for USB-powered industrial sensors and low-voltage embedded peripherals.

For engineers reviewing the MEZD41501A-A datasheet, MEZD41501A-A pinout, MEZD41501A-A application, or MEZD41501A-A equivalent, key selection factors include its 600kHz switching frequency, OTP-triggered shutdown at 150°C, 0–85°C operating range, absence of short-circuit protection, and fixed 5V output variant within the mEZD41501A-X family.

Technical Context

This module implements a synchronous boost topology using the MP3429 QFN-16 IC with integrated gate drivers and current-mode control. Feedback is resistor-divided from VOUT to FB pin, enabling precise regulation via external R1/R2 (750kΩ/187kΩ for 5V). The 1.5µH power inductor supports 19A Irms and operates with <3.3mΩ DCR.

Thermal management relies on copper pour under U1 and L1, with over-temperature protection activating at 150°C. No short-circuit recovery is implemented-output fault requires input cycle reset. Line and load regulation are ±0.2% and ±0.5%, respectively, verified across full input and load ranges.

Key Specifications

Pinout & Package

MEZD41501A-A is supplied as a 6-pin through-hole board module (VIN, GND, VOUT ×2 each) with 2.54mm pitch connectors. Physical dimensions and layout follow Monolithic Power's mEZ standard for plug-and-play integration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-up power supply applications.

Compared with MP3429GL, MEZD41501A-A eliminates magnetics selection and loop compensation but fixes output to 5V; versus mEZD41502A-A, it trades 1A output for lower cost and thermal footprint in space-constrained designs.

Availability

MEZD41501A-A is available at Aetrix Electronics and suitable for USB-powered sensor nodes, industrial HMI panels, and portable test instruments requiring stable component supply, rapid prototyping, and production-ready power modules.

Supply support for MEZD41501A-A 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, computing, and automotive markets.

The mEZ series delivers pre-validated, open-design power modules targeting rapid deployment in space- and time-constrained embedded systems-emphasizing ease of integration over configurability.

FAQ

Is MEZD41501A-A RoHS-compliant and halogen-free?

Yes. MEZD41501A-A meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. All passives and the MP3429GL IC are qualified to these standards, and the PCB substrate uses FR-4 with lead-free ENIG finish.

Can MEZD41501A-A operate with input voltage below 2.7V?

No. The MP3429 controller inside has an absolute minimum VIN of 2.5V, but the module is characterized and guaranteed only from 2.7V. Operation below 2.7V may cause startup failure, output droop, or erratic regulation due to undervoltage lockout activation.

What is the recommended input capacitance for MEZD41501A-A?

The reference design uses three 22µF X7R 1206 ceramic capacitors (C1A–C1C) totaling 66µF at the VIN pins. This value ensures <50mV input ripple under 1A load transients and maintains stability across the 2.7–4.2V range.

Does MEZD41501A-A support enable or power-good signaling?

No. The module lacks dedicated EN or PGOOD pins. Its operation is always active when VIN is within spec. To implement controlled startup, place a series MOSFET on the input rail with external gate control.

How does thermal performance change above 60°C ambient?

Derating begins at 60°C ambient: output current drops linearly to 0.5A at 85°C. This is enforced by internal OTP at 150°C junction temperature; PCB copper area under U1 and L1 directly impacts the derating curve.

Is there a replacement for MEZD41501A-A given its end-of-life notice?

Monolithic Power recommends MP3429GL as the functional replacement IC, but no drop-in module replacement exists. Aetrix offers design migration support-including reference schematics, layout review, and thermal validation-for transitioning from MEZD41501A-A to MP3429-based custom solutions.

What is the maximum allowable output capacitance?

Maximum recommended output capacitance is 220µF. Exceeding this risks overshoot during startup and instability due to interaction with the fixed compensation network. The reference design uses 2×22µF (C2A/C2B) + 100nF (C2D) = 44.1µF total.