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Monolithic Power Systems Inc. MEZD71201A-D
- Part No.:
- MEZD71201A-D
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 3-SIP Module
- Datasheet:
-
MEZD71201A-D.pdf
- Description:
- DC DC CONVERTER 1.8V
- Quantity:
- Payment:
- Shipping:
Inventory:3,465
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Product details
Overview
MEZD71201A-D from Monolithic Power Systems is a 1A synchronous step-down DC/DC power supply module with fixed 1.8V output, 4.5–24V input range, ±2.5% output voltage accuracy, 400kHz switching frequency, and hiccup-mode short-circuit protection. It integrates power MOSFETs, inductor, and compensation circuitry, and is designed for space-constrained industrial and embedded power rails.
For engineers reviewing the MEZD71201A-D datasheet, MEZD71201A-D pinout, MEZD71201A-D application, or MEZD71201A-D equivalent, key selection considerations include input voltage headroom (VIN > VOUT + 1V), thermal derating above 45°C, load regulation (±1% typ.), and compatibility with 0805/1206 external capacitors per reference design.
Technical Context
This module implements a fully integrated buck converter architecture with internal high- and low-side MOSFETs, fixed-frequency current-mode control, and internal compensation. It operates across ambient temperatures from –40°C to +85°C and enters hiccup mode upon sustained short-circuit or overtemperature events (OTP trigger at 150°C).
The device supports output voltage selection via part number suffix (D = 1.8V), requires no external feedback resistors, and delivers up to 1A continuous load with ≤28mV peak-to-peak ripple at 12VIN/3.3VOUT full load. Input voltage must exceed output by at least 1V for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - Supports wide industrial bus voltages including 5V, 12V, and 24V rails. |
| Output Voltage | 1.8V fixed - Matches core logic and low-voltage I/O supply requirements for FPGAs, microcontrollers, and sensors. |
| Max Output Current | 1A continuous - Sustains full load without external heatsinking under natural convection at ≤45°C ambient. |
| Switching Frequency | 400kHz typical - Enables compact LC filter design with standard 4.7µH inductors and ceramic output caps. |
| Output Voltage Accuracy | ±2.5% (typ.) - Ensures reliable operation of 1.8V-tolerant digital interfaces (e.g., SPI, I²C, LVCMOS). |
| Short-Circuit Protection | Hiccup mode - Limits average power dissipation during fault, enabling safe auto-recovery without latch-off. |
| Thermal Shutdown | 150°C (rise) - Protects internal silicon and PCB interconnects during sustained overload or poor airflow. |
Pinout & Package
Package: FCQFN 3×3 mm, 16-pin, exposed thermal pad (bottom side). Designed for surface-mount reflow assembly and thermal transfer to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 4.5–24V; requires local 0.22µF ceramic bypass capacitor adjacent to pin. |
| 2 (GND) | Power Ground | Primary PGND return path for high-current switch node; connects to thermal pad and ground plane. |
| 3 (VOUT) | Regulated Output | Delivers 1.8V at up to 1A; requires 22µF X7T/X5R ceramic output capacitance per reference layout. |
| 4–16 | No Connect / Thermal Pad | Pins 4–15 are NC; Pin 16 is thermal pad - must be soldered to ≥2 cm² internal/external copper for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor | 4.7µH shielded power inductor embedded in package - eliminates external magnetics and reduces EMI loop area. |
| Open Design Files | Gerber files, BOM, and schematic (DIY71201-AX) provided - enables layout validation and custom board integration. |
| Over-/Under-Voltage Protection | Monitors VIN and VOUT - disables switching if input drops below UVLO threshold or output exceeds OVP limit. |
| Startup Rise Time | 0.75ms (typ.) - Controls inrush current and ensures controlled power-up sequencing for downstream logic. |
| MTBF Reliability | 4185×10³ hours (MIL-HDBK-217F) - Validated for long-life industrial and infrastructure applications. |
Applications
| Industrial PLC I/O Module | FPGA Core Power Supply |
|---|---|
Use Scenario: Providing clean 1.8V rail to digital I/O banks in programmable logic controllers operating in factory-floor environments with 24V DC distribution. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 1.8V at up to 1A with <28mV ripple and ±1% load regulation. Use Value: Eliminates need for external controller, gate drivers, and discrete inductor - reduces BOM count and layout area by >40% vs. discrete buck solution. | Use Scenario: Powering FPGA core logic (e.g., Xilinx Artix-7, Intel Cyclone V) requiring tightly regulated 1.8V with fast transient response. IC Role / Device Role / Timing Role: Fixed-output buck module supplying FPGA VCCINT with hiccup protection during configuration faults. Use Value: Meets FPGA core voltage tolerance (±3%) and startup timing (≤0.75ms rise) without external compensation components. |
| Medical Sensor Node | Automotive Body Control Module |
Use Scenario: Powering ultra-low-noise analog front-end and ADC in portable patient monitors with battery-backed 12V input. IC Role / Device Role / Timing Role: Isolated 1.8V supply with <2.5% accuracy and thermal shutdown at 150°C for safety-critical operation. Use Value: Maintains ADC reference stability across –40°C to +85°C ambient, supporting Class II medical device temperature compliance. | Use Scenario: Generating 1.8V for CAN transceiver I/O and microcontroller peripherals in 12V automotive body electronics. IC Role / Device Role / Timing Role: Robust DC/DC stage tolerant of load dump (24V transients) and cold-crank (4.5V min) conditions. Use Value: Operates across full automotive battery range without external pre-regulator; hiccup mode prevents thermal runaway during wiring faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3530 | Successor product: 3.3–18V input, 1A, 1.8V fixed, 1.5mm height, improved efficiency (92% @ 12V→1.8V/1A) | Replaces MEZD71201A-D in new designs; requires updated PCB footprint and layout due to different pinout and thermal pad geometry | Select MPM3530 for new designs requiring higher efficiency, lower profile, and active lifecycle support. |
| TI TPSM84203 | 1.8V fixed, 4.5–17V input, 3A rating, larger 7×7mm QFN, no hiccup mode (latch-off on short) | Suitable where higher current headroom or TI ecosystem alignment is required; lacks hiccup recovery behavior | Choose TPSM84203 only when 3A capability or TI-specific qualification (AEC-Q200) is mandatory. |
Compared with MEZD71201A-D, MPM3530 offers superior efficiency and smaller form factor but requires layout revision, while TPSM84203 provides higher current and automotive qualification at the cost of fault-handling behavior and footprint compatibility.
Availability
MEZD71201A-D is available at Aetrix Electronics and suitable for industrial PLCs, FPGA power supplies, medical sensor nodes, and automotive body control modules requiring stable component supply despite end-of-life status.
Supply support for MEZD71201A-D 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, computing, and automotive markets.
The mEZD71201A series belongs to MPS's ready-to-use power module product line, engineered to simplify point-of-load design by integrating all critical power stages into a thermally optimized, drop-in package.
FAQ
Is MEZD71201A-D still in production?
No - MEZD71201A-D is officially End-of-Life (EOL) per MPS documentation. Monolithic Power Systems recommends migrating to the MPM3530 as its direct successor. Aetrix Electronics maintains limited legacy stock for last-time buys and repair fulfillment, with full traceability and date-code visibility.
What is the minimum input voltage required for 1.8V output regulation?
The datasheet specifies that input voltage must exceed output voltage by at least 1V for proper regulation. Therefore, the minimum valid input is 2.8V. However, the rated input range starts at 4.5V - operation below this voltage is not characterized or guaranteed for performance, efficiency, or thermal behavior.
Can MEZD71201A-D be used with 24V input continuously?
Yes - the device is rated for 4.5V to 24V input and supports continuous operation at 24V, provided ambient temperature remains ≤45°C and adequate PCB copper area is used for thermal dissipation. At 24V/1.8V/1A, efficiency drops to ~78%, increasing thermal load accordingly.
Does it require external feedback resistors?
No - MEZD71201A-D has a factory-trimmed, fixed 1.8V output. The feedback network is fully internal; no external resistors or programming pins are needed. Output voltage is set solely by the part number suffix (D = 1.8V), and cannot be adjusted in-circuit.
What is the recommended PCB layout for thermal performance?
MPS specifies that the exposed thermal pad (Pin 16) must be soldered to a minimum 2 cm² copper area on inner or outer layers, connected via ≥4 thermal vias (0.3mm diameter) to internal ground planes. The reference design uses a 12mm × 12mm thermal pad with 9 vias - deviation reduces maximum sustainable load current above 45°C ambient.
Is there a functional difference between MEZD71201A-D and MEZD71201A-F?
Yes - the suffix denotes fixed output voltage only: D = 1.8V, F = 3.3V. All other electrical specifications (input range, current rating, protection features, package, and pinout) are identical. No internal circuitry or compensation differs; only the output voltage trim setting is changed at wafer test.
Does it support remote sensing?
No - MEZD71201A-D does not include remote sense pins or differential feedback inputs. Regulation is based on local VOUT measurement at the module's output pin. For applications requiring tight regulation under high-impedance traces, an external LDO post-regulator or a module with remote sense (e.g., MPM3695) should be considered.
MEZD71201A-D 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):
- 24V
- Voltage - Output 1:
- 1.8V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 1.2A
- 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:
- -
MEZD71201A-D FAQ
1.How can I place an order for MEZD71201A-D through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD71201A-D 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 MEZD71201A-D reliable?
The price and inventory of MEZD71201A-D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD71201A-D is usually 5 days.
3.What payment methods are accepted for MEZD71201A-D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD71201A-D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD71201A-D?
MEZD71201A-D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD71201A-D 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 MEZD71201A-D?
For technical support, including MEZD71201A-D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD71201A-D requirements.
6.How does Aetrix verify that MEZD71201A-D is sourced from the original manufacturer or authorized distributors?
All MEZD71201A-D 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 MEZD71201A-D meets industry standards.
7.What is the process for return or replacement of MEZD71201A-D?
All MEZD71201A-D units undergo pre-shipment inspection (PSI). If there is an issue with MEZD71201A-D, 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 MEZD71201A-D part is unused and in its original packaging.
Return procedure for MEZD71201A-D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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