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Monolithic Power Systems Inc. MEZD72402A-B
- Part No.:
- MEZD72402A-B
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 3-SIP Module
- Datasheet:
-
MEZD72402A-B.pdf
- Description:
- DC DC CONVERTER 1.2V
- Quantity:
- Payment:
- Shipping:
Inventory:1,952
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Product details
Overview
MEZD72402A-B from Monolithic Power Systems is a ready-to-use, synchronous step-down DC/DC power supply module delivering 2 A at 1.2 V output from a 4.5–36 V input. It integrates MOSFETs, controller, and compensation, operates at 400 kHz switching frequency, features hiccup-mode short-circuit protection, and is qualified for industrial temperature range (−40°C to +85°C). Used in distributed power architectures for industrial PLCs and embedded controllers.
For engineers reviewing the MEZD72402A-B datasheet, MEZD72402A-B pinout, MEZD72402A-B application, or MEZD72402A-B equivalent, key selection criteria include input voltage headroom (VIN > VOUT + 1 V), ±2.5% output voltage accuracy, 26.4 mV output ripple at 3.3 V/2 A, thermal derating above 85°C ambient, and EOL status requiring migration planning to MPM3530.
Technical Context
The MEZD72402A-B implements a fixed-frequency current-mode synchronous buck converter with integrated high- and low-side MOSFETs, internal compensation, and power-good signaling. It supports adjustable soft-start via external capacitor on EN pin and uses a QFN-16 package with exposed thermal pad for efficient heat dissipation.
Its control loop maintains ±1% line regulation (VIN = 4.5–36 V) and ±1% load regulation (IOUT = 0–2 A) at VOUT = 3.3 V. Over-temperature protection triggers at 150°C with automatic recovery, and short-circuit protection enters hiccup mode-disabling switching for 120 ms before retrying.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V - supports 12 V/24 V industrial rails and tolerates automotive load dump transients up to 36 V |
| Output Voltage | 1.2 V (fixed, B-option) - factory-set; no external resistor divider required |
| Max Output Current | 2 A continuous - sustained at full load with natural convection cooling up to 85°C ambient |
| Switching Frequency | 400 kHz typical - enables compact external filter design with ≤10 µF output capacitance |
| Output Voltage Accuracy | ±2.5% (typ.) - ensures stable core voltage for microcontrollers and FPGAs under varying load/temperature |
| Output Ripple | 26.4 mV pk-pk @ VIN=24 V, VOUT=3.3 V, IOUT=2 A - meets noise-sensitive analog supply requirements without additional LDO post-regulation |
| Protection Features | Hiccup short-circuit, over-temperature (150°C), over-current, under-voltage lockout - autonomous fault recovery without host intervention |
Pinout & Package
MEZD72402A-B is housed in a thermally enhanced QFN-16 package (5 mm × 5 mm × 1.0 mm) with exposed thermal pad (Pin 16) for PCB-level heat sinking. Pin numbering follows standard top-view orientation with Pin 1 marked by dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Primary DC input connection; requires local 0.22 µF ceramic decoupling adjacent to pin |
| 2 (GND) | Power Ground | High-current return path for input and output stages; tied directly to thermal pad |
| 3 (VOUT) | Regulated Output | 2 A capable output node; routed with wide copper pour and ≥22 µF bulk capacitance |
| 4–15 (NC) | No Connect | Unbonded pads; must remain unconnected and un-soldered per MPS design |
| 16 (PAD) | Thermal & Electrical Ground | Exposed copper pad; soldered to solid GND plane for thermal conduction and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Synchronous Buck Topology | Eliminates need for external MOSFETs, drivers, and loop compensation components - reduces BOM count by ≥12 parts |
| Factory-Set Output Voltage | 1.2 V option (B suffix) laser-trimmed during test - avoids tolerance stack-up from external resistive dividers |
| Hiccup-Mode Short-Circuit Response | Auto-retry every 120 ms after fault - prevents thermal runaway while enabling remote system recovery |
| Open Design Files & BOM | Gerber files, schematic, and validated bill-of-materials provided - accelerates layout verification and second-source procurement |
| Natural Convection Thermal Performance | Full 2 A output sustained at 85°C ambient without forced airflow - suitable for sealed enclosures |
Applications
| Industrial Sensor Node | Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Compact DIN-rail mounted sensor aggregator powering ARM Cortex-M4 MCU, RS-485 transceiver, and analog front-end. IC Role / Device Role / Timing Role: Primary 1.2 V core supply for microcontroller and peripheral logic. Use Value: Delivers clean, regulated 1.2 V at 2 A with <27 mV ripple - eliminates need for post-regulator LDO and saves board space. | Use Scenario: Backplane-mounted I/O module requiring robust 12 V-to-1.2 V conversion in harsh factory environments. IC Role / Device Role / Timing Role: Isolated auxiliary rail generator supporting FPGA configuration and real-time Ethernet PHY. Use Value: Withstands 36 V transients and maintains regulation across −40°C to +85°C - ensures deterministic boot timing and runtime stability. |
| Medical Point-of-Care Device | Automotive Diagnostic Tool |
Use Scenario: Portable ultrasound subsystem with low-noise analog signal chain and battery-backed digital processing. IC Role / Device Role / Timing Role: Low-ripple 1.2 V supply for ADC reference and DSP core. Use Value: 26.4 mV pk-pk ripple at full load meets SNR requirements for 14-bit medical-grade data acquisition without added filtering. | Use Scenario: Handheld OBD-II scanner powered from vehicle 12 V battery with cold-crank immunity. IC Role / Device Role / Timing Role: Main system regulator converting cranking-suppressed 6.5–16 V to stable 1.2 V. Use Value: 4.5–36 V input range covers cold-crank dips (≥6.5 V) and load-dump spikes (≤36 V) - ensures uninterrupted firmware execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3530 | Successor part: 4.5–36 V input, 3 A output, 2.2 MHz switching, smaller QFN-13 (4×4 mm) | Higher current, higher frequency, lower profile - requires updated layout and reduced output capacitance | Select for new designs needing >2 A or tighter board area; not drop-in compatible due to pinout and footprint change |
| mEZD72401A-B | Same family, 1 A output rating, identical pinout and footprint | Lower thermal stress at light loads; insufficient for 2 A continuous use cases | Acceptable only if peak load remains ≤1 A and thermal margin is verified per application derating curve |
Compared with MPM3530, MEZD72402A-B offers proven industrial reliability at 400 kHz but lacks scalability beyond 2 A; versus mEZD72401A-B, it doubles output current while sharing layout compatibility - making it optimal for legacy upgrades where 2 A is mandatory and board re-spin is prohibited.
Availability
MEZD72402A-B is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive test equipment requiring stable component supply despite end-of-life status.
Supply support for MEZD72402A-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 modules, headquartered in Kirkland, WA, with global design and support centers.
The mEZD72402A series targets rapid deployment of reliable, pre-validated DC/DC solutions for industrial and embedded systems where time-to-market and design assurance outweigh custom power stage optimization.
FAQ
Is MEZD72402A-B still in active production?
No - MEZD72402A-B is officially End-of-Life (EOL) per Monolithic Power Systems documentation dated February 2018. Aetrix Electronics holds limited legacy stock and provides last-time-buy support with full traceability. Migration to MPM3530 is recommended for new designs.
What is the minimum input voltage required for 1.2 V output?
The datasheet specifies VIN must exceed VOUT by at least 1 V. For MEZD72402A-B (VOUT = 1.2 V), minimum valid input is 2.2 V - however, the device's absolute minimum rated VIN is 4.5 V. Operation below 4.5 V is not guaranteed or characterized.
Can the output voltage be adjusted externally?
No - MEZD72402A-B has a factory-laser-trimmed, fixed 1.2 V output. The "B" suffix denotes this specific voltage option. Output adjustment requires selecting a different variant (e.g., MEZD72402A-F for 3.3 V) or using the DIY version (DIY72402-AX) with external resistor divider.
Does MEZD72402A-B require an external bootstrap capacitor?
No - the bootstrap circuitry is fully integrated. Unlike discrete controllers, this module contains all necessary charge-pump and gate-drive components internally; no external BST capacitor is needed or supported.
How is thermal performance affected when operating above 85°C ambient?
Derating begins at 85°C ambient per the published power vs. temperature curve. At 105°C ambient, maximum sustainable output drops to ~1.3 A under natural convection. Forced airflow or enhanced PCB copper pours extend usable current range.
What does "hiccup mode" short-circuit protection mean in practice?
Upon short-circuit detection, MEZD72402A-B disables switching, waits 120 ms, then attempts restart. If fault persists, it repeats the cycle. This limits average power dissipation to safe levels (<1 W) and prevents thermal damage without requiring manual reset.
Are Gerber files and schematics available for this module?
Yes - Monolithic Power Systems provides open design files including full schematic, PCB layout (Gerber), and BOM for the mEZD72402A series. These are accessible via [email protected] and referenced in the Rev. 1.4 datasheet.
MEZD72402A-B 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):
- 36V
- Voltage - Output 1:
- 1.2V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 2A
- 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:
- -
MEZD72402A-B FAQ
1.How can I place an order for MEZD72402A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD72402A-B 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 MEZD72402A-B reliable?
The price and inventory of MEZD72402A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD72402A-B is usually 5 days.
3.What payment methods are accepted for MEZD72402A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD72402A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD72402A-B?
MEZD72402A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD72402A-B 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 MEZD72402A-B?
For technical support, including MEZD72402A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD72402A-B requirements.
6.How does Aetrix verify that MEZD72402A-B is sourced from the original manufacturer or authorized distributors?
All MEZD72402A-B 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 MEZD72402A-B meets industry standards.
7.What is the process for return or replacement of MEZD72402A-B?
All MEZD72402A-B units undergo pre-shipment inspection (PSI). If there is an issue with MEZD72402A-B, 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 MEZD72402A-B part is unused and in its original packaging.
Return procedure for MEZD72402A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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