Monolithic Power Systems Inc. MEZD41501A-B

Overview

MEZD41501A-B from Monolithic Power Systems is a ready-to-use, fixed-frequency 600kHz step-up DC/DC power supply module delivering 12V at 1A from a 2.7–10V input. It integrates the MP3429 boost controller, power inductor, and full passive BOM in a compact board format. Designed for space-constrained industrial and embedded systems requiring stable 12V rail generation from single-cell Li-ion or multi-cell battery sources.

For engineers reviewing the MEZD41501A-B datasheet, MEZD41501A-B pinout, MEZD41501A-B application, or MEZD41501A-B equivalent, this module offers verified 12V output accuracy (±2.2%), low output ripple (50mV typ. at 12V/1A), high efficiency (96.7% at 6.6V→12V), over-temperature protection (150°C), and a validated 6-pin VIN/GND/VOUT terminal layout.

Technical Context

The MEZD41501A-B implements a synchronous boost topology using the MP3429 QFN-16 IC with integrated gate drivers and current-mode control. Its fixed 600kHz switching frequency enables compact external filtering while maintaining >96% efficiency across its 2.7–10V input range.

Output voltage is set by resistor divider R2/R3 (68kΩ/10kΩ for 12V), referenced to the FB pin. The module lacks short-circuit protection-output must not be shorted-and relies on internal OTP (150°C) for thermal safety under sustained overload or poor airflow.

Key Specifications

Availability

MEZD41501A-B is available at Aetrix Electronics and suitable for industrial HMI panels, portable test equipment, and IoT edge gateways requiring stable component supply, rapid prototyping turnaround, and pre-validated power stage performance.

Supply support for MEZD41501A-B 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 fully assembled, tested, and documented DC/DC power modules targeting design acceleration for engineers needing reliable, drop-in power solutions without layout or component selection risk.

FAQ

What is the maximum safe input voltage for MEZD41501A-B?

The absolute maximum input voltage is 10V as specified in the electrical characteristics table. Exceeding 10V risks permanent damage to the integrated MP3429 controller and output capacitor ratings. Input transient suppression is recommended if used with unregulated sources prone to overshoot.

Can MEZD41501A-B be paralleled for higher current?

No - the module lacks current-sharing capability or synchronization inputs. Paralleling will cause unequal load distribution and potential instability due to timing mismatch between independent 600kHz oscillators. For >1A, select MEZD41502A-X (2A) or MEZD41503A-X (3A) variants.

Is short-circuit protection enabled on this module?

No - the datasheet explicitly states "No output short allowed." The module has no hiccup or foldback protection. A short on VOUT will cause immediate thermal shutdown (OTP) and may damage the SW node or inductor if sustained. External e-fuse or current-limiting switch is required for fault-tolerant designs.

What are the PCB mounting requirements for thermal performance?

The module uses a 6-pin through-hole connector (Wurth) with no thermal pad. Heat dissipation relies on copper area under GND pins (pins 3 & 4) and airflow. Minimum 100mm² of 2oz copper connected to GND pins is recommended; derating begins above 60°C ambient without forced air.

Does MEZD41501A-B support enable or power sequencing?

Yes - the EN pin of the internal MP3429 is routed to the board but not externally accessible on the standard mEZD41501A-B layout. To implement enable control, a custom variant or discrete implementation using MP3429GL is required. No built-in power-good or sequencing signals are provided.

What is the expected lifetime under continuous 1A load at 60°C ambient?

Calculated MTBF is 4185×10³ hours per MIL-HDBK-217F. At 60°C ambient and full 1A load, junction temperature remains below 110°C (based on thermal resistance modeling), supporting >10-year operation in well-ventilated enclosures with no significant electrolytic capacitor aging concerns.