Monolithic Power Systems Inc. MEZD41502A-A

Overview

MEZD41502A-A from Monolithic Power Systems is a ready-to-use, fixed-frequency boost DC-DC converter module delivering 5V at 2A from a 2.7–4.2V input. It integrates the MP3429 controller, power inductor, and full passive BOM in a compact board format, designed for space-constrained portable power rails requiring high efficiency (97.2% typ.) and low output ripple (27mV typ. at 5V/2A).

For engineers reviewing the MEZD41502A-A datasheet, MEZD41502A-A pinout, MEZD41502A-A application, or MEZD41502A-A equivalent, this module offers verified performance across battery-powered instrumentation, USB-C PD sink adapters, industrial handheld terminals, and embedded 5V rail generation where input voltage is tightly bounded by single-cell Li-ion sources.

Technical Context

The MEZD41502A-A implements a synchronous step-up topology using the MP3429 QFN-16 controller with integrated gate drivers and current-mode control. It operates at a fixed 600kHz switching frequency to balance efficiency and EMI, supports no-load regulation, and includes over-temperature protection (OTP) triggering at 150°C.

Input-to-output conversion is configured via external resistor dividers (R1/R2 = 750kΩ/187kΩ for 5V), with feedback referenced to the FB pin. The module lacks short-circuit protection-output faults must be externally managed-and requires stable input capacitance (three 22µF 1206 X7R ceramics) per design.

Key Specifications

Availability

MEZD41502A-A is available at Aetrix Electronics and suitable for portable medical monitors, USB-C powered accessories, and battery-backed IoT gateways requiring stable component supply, rapid prototyping turnaround, and pre-validated power stage compliance.

Supply support for MEZD41502A-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 integrated power modules, headquartered in Kirkland, WA.

The mEZD series delivers turnkey, open-design boost modules targeting rapid deployment in battery-powered and space-constrained applications where layout expertise and validation time are critical constraints.

FAQ

What is the recommended input capacitor configuration for MEZD41502A-A?

The reference design uses three 22µF, 10V X7R ceramic capacitors in 1206 package (C1A–C1C) placed close to the VIN pins. This configuration ensures low-impedance input filtering and meets RMS current handling requirements under 2A load transients.

Does MEZD41502A-A support adjustable output voltage?

No. MEZD41502A-A is factory-configured for 5V output using fixed R1/R2 divider values (750kΩ/187kΩ). Output voltage cannot be modified without hardware changes to the feedback network, which voids performance guarantees and thermal validation.

Is short-circuit protection implemented on this module?

No. The datasheet explicitly states "No output short allowed." The module lacks internal short-circuit current limiting or hiccup mode. External protection (e.g., eFuse or polyfuse) is required for systems subject to accidental output shorts.

What is the thermal shutdown threshold and recovery behavior?

Over-temperature protection triggers at 150°C junction temperature. The module shuts down until die temperature falls below ~135°C hysteresis, then resumes normal operation without manual reset. Thermal shutdown is implemented in the MP3429 controller and verified across the full board assembly.

Can MEZD41502A-A be paralleled for higher current?

No. The module lacks current-sharing circuitry or synchronization capability. Parallel operation is not supported, and doing so may cause instability, unequal current distribution, or premature failure due to timing mismatch between independent 600kHz oscillators.

What is the status of MEZD41502A-A per the manufacturer's lifecycle notice?

MPS has declared MEZD41502A-A end-of-life and recommends migration to MP3429-based discrete designs. Aetrix Electronics maintains limited legacy stock for replacement and maintenance use but does not offer new design-in support for this variant.