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Monolithic Power Systems Inc. MEZD74800A-A
- Part No.:
- MEZD74800A-A
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 3-SIP Module
- Datasheet:
-
MEZD74800A-A.pdf
- Description:
- DC DC CONVERTER 3.3V
- Quantity:
- Payment:
- Shipping:
Inventory:1,732
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Product details
Overview
MEZD74800A-A from Monolithic Power Systems is a fully integrated, wide-input DC/DC power supply module delivering 3.3V at 0.3A from 4.5–75V input, featuring hiccup-mode short-circuit protection, ±1.7% output voltage accuracy, 140kHz switching frequency, and EN55022 Class B emissions compliance - deployed in industrial power rails and remote sensor nodes.
For engineers reviewing the MEZD74800A-A datasheet, MEZD74800A-A pinout, MEZD74800A-A application, or MEZD74800A-A equivalent, key selection considerations include input voltage range (4.5–75V), fixed 3.3V output, thermal shutdown at 175°C, hiccup-mode fault response, and board-level EMI performance per radiated emissions test data.
Technical Context
This module integrates a synchronous buck controller, power MOSFETs, and compensation into a single LGA package. It operates in forced PWM mode with internal feedback loop compensation, eliminating external loop components for the 3.3V variant (R1 omitted per BOM).
The device implements analog-based over-temperature protection (175°C trip), cycle-by-cycle current limiting, and automatic recovery hiccup mode during sustained short-circuit events - all without requiring external enable or soft-start circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports unregulated industrial bus rails including 24V, 48V, and 72V systems without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.7% (typ.) - eliminates external resistor divider; suitable for powering MCU cores and low-voltage logic. |
| Max Output Current | 0.3A continuous - sufficient for microcontrollers, RS-485 transceivers, and isolated gate drivers in space-constrained designs. |
| Switching Frequency | 140kHz at 3.3V output - enables use of small external ceramic capacitors (1µF input, 10µF output) and reduces EMI filter size. |
| Short-Circuit Protection | Hiccup mode - limits average power dissipation during fault, prevents thermal runaway, and auto-recovers after fault removal. |
| Operating Temperature | −40°C to +85°C ambient - validated for deployment in outdoor enclosures and factory automation cabinets. |
| Ripple & Noise | 44mVpp at VIN=48V, VOUT=3.3V, full load - meets typical analog sensor and ADC reference supply requirements without additional LC filtering. |
Pinout & Package
Package: 10mm × 10mm × 4.2mm LGA (Land Grid Array) with exposed thermal pad; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main DC input connection; accepts 4.5–75V; requires local 1µF ceramic decoupling per layout guidelines. |
| 2 | GND | Power ground return path; tied directly to thermal pad for optimal heat dissipation and noise control. |
| 3 | VOUT | Regulated 3.3V output; routed with low-inductance trace and terminated with 10µF ceramic capacitor near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Buck Module | MPM3570E core - combines controller, high-/low-side MOSFETs, and compensation in one LGA package; no external power stage needed. |
| EN55022 Class B Compliance | Verified radiated emissions ≤ limits up to 1GHz - enables direct integration into CE-marked industrial equipment without added shielding. |
| Open Design Files & BOM | Gerber files, schematic, and complete BOM publicly available - accelerates design reuse and third-party manufacturing validation. |
| Wide Input Range Operation | 4.5–75V operation accommodates battery sag (e.g., 12V lead-acid), rectified AC lines, and PoE++ derived supplies without derating. |
| Hiccup Short-Circuit Response | Current-limited restart cycles prevent latch-up and allow safe operation in inaccessible field-deployed units. |
Applications
| Industrial Sensor Node Power | RS-485 Transceiver Supply |
|---|---|
Use Scenario: Remote temperature/humidity sensor node powered from 24V DC distribution rail with intermittent wireless transmission. IC Role / Device Role / Timing Role: Primary 3.3V system rail generator for MCU, radio SoC, and analog front-end. Use Value: Eliminates need for discrete buck converter design; 140kHz switching allows compact 10×20mm PCB footprint with minimal filtering. | Use Scenario: Isolated RS-485 communication interface in PLC backplane with shared 48V supply. IC Role / Device Role / Timing Role: Local 3.3V bias supply for half-duplex transceiver IC and level-shifting logic. Use Value: Hiccup protection prevents bus lockup during cable fault; ±1.7% output accuracy ensures stable driver bias under line/load variation. |
| Factory Automation I/O Module | Smart Actuator Control Board |
Use Scenario: DIN-rail mounted digital input module receiving 72V DC from centralized power supply. IC Role / Device Role / Timing Role: Secondary 3.3V rail for FPGA configuration memory, optocoupler drivers, and status LEDs. Use Value: −40°C to +85°C rating ensures reliability in unconditioned control cabinets; EN55022 Class B compliance avoids EMC retest delays. | Use Scenario: Brushless motor actuator with onboard position sensing and CAN communication. IC Role / Device Role / Timing Role: Dedicated 3.3V supply for Hall-effect sensor ICs and microcontroller peripherals. Use Value: 44mVpp ripple meets ADC reference stability requirements; hiccup mode prevents thermal damage during motor stall faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output DC/DC power module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3572 | Successor part; same 10×10mm LGA, 4.5–75V input, but supports adjustable output (0.8–15V) via external resistor divider. | Requires external feedback resistors; not pin-compatible due to FB pin addition and different pinout. | Select MPM3572 when output voltage flexibility or higher efficiency at light loads is required; redesign PCB layout and BOM. |
| TFS7703-3.3 | Fixed 3.3V output, 0.3A, 4.5–75V input, but uses flyback topology and larger SOIC-8 package with external transformer. | Higher EMI risk; requires custom magnetics; lacks EN55022 Class B certification out-of-box. | Choose only if isolation is mandatory; otherwise, MEZD74800A-A offers superior integration and EMI performance. |
Compared with MPM3572, MEZD74800A-A provides simpler implementation for fixed 3.3V needs but lacks adjustability; versus TFS7703-3.3, it delivers lower profile, better EMI behavior, and no magnetic component sourcing - critical for rapid prototyping and volume production.
Availability
MEZD74800A-A is available at Aetrix Electronics and suitable for industrial sensor nodes, RS-485 transceiver supplies, and factory automation I/O modules requiring stable component supply despite end-of-life status.
Supply support for MEZD74800A-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, automotive, and cloud infrastructure markets.
The mEZD74800A-X series targets space-constrained, wide-input industrial power conversion - designed to replace discrete buck solutions with certified, drop-in-ready modules that reduce design cycle time and EMI qualification risk.
FAQ
Is MEZD74800A-A still in production?
No - MEZD74800A-A is officially End-of-Life per MPS documentation dated May 2019. It is superseded by MPM3572, which maintains the same mechanical footprint but adds output voltage adjustability and updated thermal performance.
Can MEZD74800A-A be used with input voltages below 4.5V?
No - the absolute minimum input voltage is 4.5V. Attempting operation below this threshold results in undervoltage lockout activation and no output regulation. The device requires VIN ≥ VOUT + 1V, making 3.3V output incompatible with sub-4.3V inputs.
What is the thermal pad soldering requirement?
The exposed thermal pad on the bottom of the LGA package must be soldered to a solid copper pour connected to GND. Minimum recommended stencil aperture is 80% open area; reflow profile must achieve full wetting to ensure thermal resistance < 12°C/W to PCB.
Does MEZD74800A-A require external feedback components?
No - the 3.3V version (MEZD74800A-A) has internal feedback setpoint; R1 is not populated per BOM. Only the 5V variant (MEZD74800A-B) uses a 698kΩ resistor between FB and GND to set output voltage.
How does hiccup-mode protection behave during overload?
Under sustained overload or short-circuit, the device shuts down, waits ~500ms, attempts restart, and repeats. Each cycle delivers <10mJ energy - limiting temperature rise and enabling safe operation in sealed enclosures without airflow.
Is EN55022 Class B compliance verified with specific test setup?
Yes - radiated emissions testing was performed per CISPR 22 (EN55022) using a 3m semi-anechoic chamber, horizontal polarization, and the exact board layout shown in the datasheet (10×20mm PCB, specified capacitor placement, and no added shielding).
What is the calculated MTBF and failure mode basis?
MTBF is 4185×10³ hours per MIL-HDBK-217F, based on 25°C ambient, 48V input, 3.3V/0.3A output, and standard derating assumptions for ceramic capacitors, silicon, and package interconnects - excluding mechanical stress or humidity-related failures.
MEZD74800A-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 3-SIP Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Linear Regulator Replacement
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 75V
- Voltage - Output 1:
- 3.3V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 300mA
- 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:
- -
MEZD74800A-A FAQ
1.How can I place an order for MEZD74800A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD74800A-A 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 MEZD74800A-A reliable?
The price and inventory of MEZD74800A-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD74800A-A is usually 5 days.
3.What payment methods are accepted for MEZD74800A-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD74800A-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD74800A-A?
MEZD74800A-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD74800A-A 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 MEZD74800A-A?
For technical support, including MEZD74800A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD74800A-A requirements.
6.How does Aetrix verify that MEZD74800A-A is sourced from the original manufacturer or authorized distributors?
All MEZD74800A-A 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 MEZD74800A-A meets industry standards.
7.What is the process for return or replacement of MEZD74800A-A?
All MEZD74800A-A units undergo pre-shipment inspection (PSI). If there is an issue with MEZD74800A-A, 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 MEZD74800A-A part is unused and in its original packaging.
Return procedure for MEZD74800A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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