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Monolithic Power Systems Inc. MEZD72401A-F
- Part No.:
- MEZD72401A-F
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 3-SIP Module
- Datasheet:
-
MEZD72401A-F.pdf
- Description:
- DC DC CONVERTER 3.3V
- Quantity:
- Payment:
- Shipping:
Inventory:3,066
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Product details
Overview
MEZD72401A-F from Monolithic Power Systems is a 1A, synchronous step-down DC/DC power supply module with fixed 3.3V output, 4.5–36V input range, ±2.5% output voltage accuracy, 400kHz switching frequency, and hiccup-mode short-circuit protection. It integrates power MOSFETs, controller, and compensation in a QFN-16 package and is used in industrial control power rails requiring compact, ready-to-use regulation.
For engineers reviewing the MEZD72401A-F datasheet, MEZD72401A-F pinout, MEZD72401A-F application, or MEZD72401A-F equivalent, key selection criteria include input voltage headroom (VIN > VOUT + 1V), thermal derating above 85°C ambient, hiccup-mode fault response, and compatibility with 22µF ceramic output capacitance per rail.
Technical Context
This module implements a constant-frequency current-mode synchronous buck converter with internal high- and low-side MOSFETs, integrated bootstrap diode, and internal compensation. It supports adjustable enable threshold via EN pin and provides power-good signaling through an open-drain PG pin (not present on this variant - only VIN/GND/VOUT pins).
Thermal protection activates at 150°C junction temperature with automatic recovery; line/load regulation remains within ±1% across full input and load ranges at 3.3V output. Input ripple rejection and EMI performance are optimized for 2.2µF input and dual 22µF output ceramic capacitors as specified in the reference layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 36V - supports 12V/24V industrial buses and wide-input legacy systems |
| Output Voltage | Fixed 3.3V ±2.5% - meets USB, MCU I/O, and logic rail tolerance requirements |
| Max Output Current | 1A continuous - sufficient for single-core microcontrollers or sensor hubs |
| Switching Frequency | 400kHz typical - enables use of compact 10µH shielded inductors and reduces EMI filtering burden |
| Protection Features | Hiccup-mode short-circuit, over-temperature (150°C), and under-voltage lockout - ensures safe fault recovery without latch-up |
| Output Ripple | 20mV peak-to-peak @ VIN=24V, VOUT=3.3V, full load - compatible with noise-sensitive analog circuitry |
| Operating Temp | −40°C to +85°C ambient - validated for unheated industrial enclosures and transportation electronics |
Pinout & Package
Delivered in a thermally enhanced QFN-16 package (5mm × 5mm × 1.0mm) with exposed thermal pad. Pinout is minimal: 3 functional terminals (VIN, GND, VOUT) plus NC and thermal pad connections - consistent with mEZD72401A-X series board-level module construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary DC input | Accepts 4.5–36V; requires ≥2.2µF X5R/X7R ceramic input capacitor close to pin |
| GND | Power ground return | Common reference for input/output paths and thermal pad; must be low-impedance plane |
| VOUT | Regulated DC output | Supplies 3.3V at up to 1A; requires dual 22µF X7T/X5R ceramic output caps per design guide |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | Eliminates external high-side/low-side MOSFETs and gate drivers - reduces BOM count and layout area |
| Open design files & BOM | Gerber, schematic, and verified bill-of-materials available - accelerates compliance validation and copy-exact manufacturing |
| Wide input range (4.5–36V) | Supports direct connection to 12V/24V vehicle batteries or industrial SMPS outputs without pre-regulation |
| Hiccup short-circuit protection | Auto-retries after fault clearance - prevents thermal runaway while maintaining system observability |
| Thermal shutdown (150°C) | Junction-sensed OTP with hysteresis - protects silicon during sustained overload or poor airflow conditions |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital I/O channels and RS-485 transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering clean, stable rail for microcontroller peripherals and level-shifted communication interfaces. Use Value: Eliminates need for external LDO post-regulation due to ±2.5% accuracy and 20mV ripple - reduces component count and board space. | Use Scenario: Supplying 3.3V to CAN transceiver and microcontroller in door module or lighting control node. IC Role / Device Role / Timing Role: Compact, rugged DC/DC module handling automotive battery transients (up to 36V load dump) without external TVS or pre-regulator. Use Value: Withstands 4.5–36V input range and hiccup protection - improves field reliability versus linear regulators in stop-start environments. |
| Medical Patient Monitor Sensor Hub | Smart Building HVAC Controller |
Use Scenario: Providing regulated 3.3V to low-power analog front-ends and wireless BLE modules in portable diagnostic devices. IC Role / Device Role / Timing Role: Efficient step-down converter enabling >85% efficiency at light loads - extends battery runtime in Class II medical equipment. Use Value: 400kHz switching allows small 10µH inductor and avoids audible noise - critical for quiet clinical environments. | Use Scenario: Powering 3.2V–3.6V IoT microcontrollers and Zigbee radios in wall-mounted thermostats with 24VAC-derived DC bus. IC Role / Device Role / Timing Role: Direct conversion from rectified 24VAC (≈34VDC peak) to 3.3V - bypasses inefficient transformer-based linear supplies. Use Value: −40°C to +85°C operation and thermal derating curve ensure reliable startup and runtime in attic or outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC step-down module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3530GQV | Same manufacturer, pin-compatible successor; higher 3A rating, 2.5–18V input, integrated inductor | Requires PCB redesign for larger footprint (6mm × 6mm); supports higher current but lower max input voltage | Select when upgrading from 1A to 3A load or migrating to newer MPS platform with extended lifecycle support |
| TFS7701-3.3 | ON Semiconductor 1A module; 4.5–36V input, 3.3V fixed, but uses external inductor and lacks hiccup protection | Needs discrete inductor placement and additional fault-handling circuitry - increases layout complexity and test coverage | Consider only if sourcing constraints require ON Semi portfolio alignment and external inductor layout is acceptable |
Compared with MPM3530GQV, MEZD72401A-F offers proven field reliability in legacy designs but lacks extended input voltage margin and current headroom; versus TFS7701-3.3, it delivers superior fault resilience and reduced design effort despite end-of-life status.
Availability
MEZD72401A-F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical sensor hubs, and smart building HVAC controllers requiring stable component supply during legacy system maintenance and obsolescence transition.
Supply support for MEZD72401A-F 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 markets.
The mEZD72401A series belongs to MPS's "mEZ" family of fully integrated, board-level DC/DC power modules designed for rapid deployment in space-constrained applications where layout expertise or time-to-market is limited.
FAQ
Is MEZD72401A-F still in active production?
No - MEZD72401A-F is officially marked End-of-Life by Monolithic Power Systems as of Rev. 1.5 (July 2019). Aetrix Electronics maintains limited legacy stock and supports last-time buys with full traceability and documentation for ongoing maintenance and repair programs.
Can MEZD72401A-F be used with input voltages below 4.5V?
No - the device requires minimum 4.5V input to maintain regulation. At VOUT = 3.3V, VIN must exceed 4.3V (VOUT + 1V headroom), but the absolute minimum specified is 4.5V. Operation below this violates datasheet limits and may cause dropout or instability.
What is the thermal pad connection requirement for QFN-16 mounting?
The exposed thermal pad must be soldered to a dedicated copper pour tied to GND with ≥4 thermal vias (0.3mm diameter) connecting to inner/ground planes. Insufficient thermal relief causes junction temperature to exceed 150°C at >700mA load in still air - per MPS thermal characterization data.
Does MEZD72401A-F support remote sensing or output voltage adjustment?
No - it is a fixed-output module with no feedback resistor network or remote sense pins. Output voltage is factory-set to 3.3V (suffix 'F') and cannot be adjusted externally. For programmable output, consider the MPM3530GQV with external resistor divider.
How does hiccup-mode protection behave during sustained short-circuit?
Upon short-circuit detection, the module shuts down for ~500ms, then attempts restart. If fault persists, it repeats the cycle indefinitely - limiting average power dissipation to <1W and preventing thermal damage. This differs from latch-off protection which requires manual reset.
Are Gerber files and BOM publicly available for MEZD72401A-F?
Yes - MPS provides complete open-design resources including Gerber files, schematic, and verified BOM (with muRata/Yageo/Panasonic part numbers) upon request to [email protected]. Aetrix Electronics can facilitate access for qualified customers under NDA.
What is the recommended input capacitor configuration?
MPS specifies a minimum 2.2µF X5R/X7R ceramic capacitor (0402 or 0603) placed within 3mm of VIN and GND pins. For high-transient environments (e.g., automotive), add a bulk 10µF tantalum or polymer capacitor upstream - total effective capacitance must exceed 12µF at 100kHz.
MEZD72401A-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 3-SIP Module
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Type:
- Linear Regulator Replacement
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output 1:
- 3.3V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 1A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OTP, OVP, SCP, UVLO
- Operating Temperature:
- -40°C ~ 85°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
MEZD72401A-F FAQ
1.How can I place an order for MEZD72401A-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD72401A-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MEZD72401A-F reliable?
The price and inventory of MEZD72401A-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD72401A-F is usually 5 days.
3.What payment methods are accepted for MEZD72401A-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD72401A-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD72401A-F?
MEZD72401A-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD72401A-F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MEZD72401A-F?
For technical support, including MEZD72401A-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD72401A-F requirements.
6.How does Aetrix verify that MEZD72401A-F is sourced from the original manufacturer or authorized distributors?
All MEZD72401A-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MEZD72401A-F meets industry standards.
7.What is the process for return or replacement of MEZD72401A-F?
All MEZD72401A-F units undergo pre-shipment inspection (PSI). If there is an issue with MEZD72401A-F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MEZD72401A-F part is unused and in its original packaging.
Return procedure for MEZD72401A-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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