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Monolithic Power Systems Inc. MEZD71201A-B
- Part No.:
- MEZD71201A-B
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 3-SIP Module
- Datasheet:
-
MEZD71201A-B.pdf
- Description:
- DC DC CONVERTER 1.2V
- Quantity:
- Payment:
- Shipping:
Inventory:3,861
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Product details
Overview
MEZD71201A-B from Monolithic Power Systems is a 1A, synchronous step-down DC/DC power supply module with 4.5–24V input range and fixed 1.2V output, integrated inductor, FCQFN3x3-16 package, ±2.5% output voltage accuracy, and hiccup-mode short-circuit protection - used in industrial I/O modules requiring compact, regulated 1.2V rail generation.
For engineers reviewing the MEZD71201A-B datasheet, MEZD71201A-B pinout, MEZD71201A-B application, or MEZD71201A-B equivalent, key selection factors include input voltage headroom (VIN > VOUT +1V), thermal derating above 85°C ambient, hiccup-mode fault response, and compatibility with 0402/0805/1206 passive footprints in DIY board integration.
Technical Context
This module implements a constant-on-time (COT) controlled synchronous buck converter with internal high-side and low-side MOSFETs, enabling fast transient response and stable operation across 4.5–24V input without external compensation. It integrates a 4.7µH shielded inductor and supports output voltages from 1.0V to 5.0V via factory-set options.
Thermal management relies on exposed thermal pad (Pin 16) soldered to PCB copper, with over-temperature protection triggering at 150°C and automatic recovery. Output regulation maintains ±1% line/load regulation at 3.3V output under full load, and ripple is specified at 28mVp-p (12VIN, 3.3VOUT, 1A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - supports 5V, 12V, and 24V industrial bus rails with ≥1V headroom over output |
| Output Voltage | 1.2V (fixed, factory-set option B) - precision-regulated for low-voltage logic or FPGA core supplies |
| Max Output Current | 1A continuous - sustained at ≤85°C ambient with natural convection and adequate PCB copper area |
| Switching Frequency | 400kHz typical - enables compact external filtering with minimal EMI risk in dense layouts |
| Output Voltage Accuracy | ±2.5% (typ.) - ensures reliable operation of 1.2V-tolerant loads such as ARM Cortex-M cores |
| Short-Circuit Response | Hiccup mode - limits average power dissipation during sustained fault, enabling safe auto-recovery |
| Operating Temperature | −40°C to +85°C - qualified for industrial control cabinets and outdoor edge nodes |
Pinout & Package
FCQFN3×3-16 package with wettable flank leads and exposed thermal pad (Pin 16). Dimensions: 3.0mm × 3.0mm × 1.8mm height. Thermal pad must be soldered to inner-layer copper pour for rated current performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Connects to bulk input capacitor (0.22µF ceramic + 4.7µF ceramic); requires low-impedance path |
| 2 (GND) | Power Ground | Primary return for high-current switching loop; ties to thermal pad and input/output caps |
| 3 (VOUT) | Regulated Output | Delivers 1.2V/1A; connects to 22µF output capacitors (C3/C4) and load decoupling |
| 16 (EPAD) | Thermal & Electrical Ground | Must be soldered to ≥100mm² internal copper plane for thermal conduction and noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor | 4.7µH shielded coil embedded in package - eliminates external inductor layout sensitivity and EMI coupling |
| Open Design Files | Gerber files, BOM, and schematic available - accelerates custom board integration and compliance validation |
| Over-Temperature Protection | 150°C trip with hysteresis - prevents thermal runaway during overload or poor airflow conditions |
| Wide Input Range | 4.5V–24V operation - accommodates unregulated 12V/24V systems with battery droop or ripple |
| Hiccup Short-Circuit Mode | Current-limited restart cycle - avoids latch-up while maintaining system-level fault visibility |
Applications
| Industrial PLC I/O Module | FPGA Core Power Supply |
|---|---|
Use Scenario: Compact DIN-rail mounted I/O module powering isolated analog input channels and digital outputs. IC Role / Device Role / Timing Role: Primary 1.2V regulator for microcontroller and signal conditioning ASICs. Use Value: Eliminates need for external inductor and feedback resistors, reducing board area by >35% vs discrete buck solution. | Use Scenario: Low-profile carrier board for Xilinx Artix-7 FPGA requiring clean, stable 1.2V core voltage. IC Role / Device Role / Timing Role: Core voltage source with <28mVp-p ripple at 1A to meet FPGA VCCINT noise budget. Use Value: Meets ±2.5% output accuracy spec for FPGA core rail, ensuring timing margin integrity at 100+ MHz operation. |
| Smart Sensor Node | Medical Diagnostic Interface |
Use Scenario: Battery-powered wireless sensor node with BLE MCU and analog front-end. IC Role / Device Role / Timing Role: Efficient 1.2V supply derived from 3.6V Li-ion cell via boost-buck architecture. Use Value: 400kHz switching enables small 0805/1206 passives; hiccup mode prevents thermal damage during sensor self-test faults. | Use Scenario: Portable ultrasound probe interface board requiring low-noise, safety-certified power. IC Role / Device Role / Timing Role: Secondary regulated rail for ADC driver amplifiers and clock buffers. Use Value: ±1% load regulation ensures consistent gain calibration across varying signal chain loading conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck module applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3530 | Successor part: 4.5–24V input, 3A output, 1.2V fixed option, 1.5MHz switching frequency | Higher current capability and faster transient response; requires revised output capacitance and layout | Select when >1A load or tighter dynamic regulation is required; footprint not pin-compatible |
| TPSM84203 | TI module: 4.5–17V input, 3A, 1.2V fixed, integrated compensation, 500kHz | Different thermal pad design and enable logic polarity; no hiccup mode (latch-off on short) | Prefer for designs needing latch-off safety behavior or TI ecosystem alignment |
Compared with MEZD71201A-B, MPM3530 offers higher current and frequency but demands layout revision, while TPSM84203 provides latch-off protection and TI support but lacks hiccup recovery - choice depends on fault-handling priority and thermal/power scaling needs.
Availability
MEZD71201A-B is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA carrier boards, smart sensor nodes, and medical diagnostic interfaces requiring stable component supply during legacy system maintenance.
Supply support for MEZD71201A-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 for industrial, computing, and automotive markets.
The mEZD71201A series targets space-constrained, thermally demanding applications where integrated inductor modules simplify design and improve reliability - especially in programmable logic and sensor interface systems.
FAQ
Is MEZD71201A-B still in production?
No - MEZD71201A-B is End-of-Life per Monolithic Power Systems' official notice. Aetrix Electronics holds limited legacy stock for repair and maintenance use only. New designs should migrate to MPM3530 or other active alternatives.
What is the minimum input voltage required for 1.2V output?
The datasheet specifies VIN must exceed VOUT by at least 1V. For 1.2V output, minimum valid input is 2.2V - but the device's absolute minimum VIN rating is 4.5V. Therefore, 4.5V is the functional lower limit regardless of output voltage.
Can MEZD71201A-B be used with 24V input continuously?
Yes - 24V is within the absolute maximum input rating. However, thermal derating applies: at 24V/1A, efficiency drops to ~82%, requiring ≥100mm² thermal pad copper and ≤40°C ambient for full-load operation without throttling.
Does it require external feedback resistors?
No - MEZD71201A-B has factory-programmed 1.2V output (option B). No external resistors or configuration pins are needed. Output voltage is fixed and non-adjustable in this variant.
How is over-temperature protection implemented?
OTP triggers at 150°C junction temperature, halting switching and entering thermal shutdown. Recovery occurs automatically once junction cools to ~135°C hysteresis threshold, resuming normal operation without external reset.
What is the recommended PCB layout for thermal performance?
Use ≥100mm² internal copper pour connected to Pin 16 (EPAD) via ≥4 thermal vias (0.3mm diameter, filled or capped). Place input/output capacitors within 3mm of respective pins and minimize high-current loop area between VIN, SW, and GND nodes.
Is the hiccup mode configurable or fixed?
Hiccup mode is fixed and non-configurable - it activates automatically during sustained short-circuit or overload. There is no pin or register to disable or alter the hiccup interval or current limit threshold.
MEZD71201A-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):
- 24V
- Voltage - Output 1:
- 1.2V
- 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-B FAQ
1.How can I place an order for MEZD71201A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD71201A-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 MEZD71201A-B reliable?
The price and inventory of MEZD71201A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD71201A-B is usually 5 days.
3.What payment methods are accepted for MEZD71201A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD71201A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD71201A-B?
MEZD71201A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD71201A-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 MEZD71201A-B?
For technical support, including MEZD71201A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD71201A-B requirements.
6.How does Aetrix verify that MEZD71201A-B is sourced from the original manufacturer or authorized distributors?
All MEZD71201A-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 MEZD71201A-B meets industry standards.
7.What is the process for return or replacement of MEZD71201A-B?
All MEZD71201A-B units undergo pre-shipment inspection (PSI). If there is an issue with MEZD71201A-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 MEZD71201A-B part is unused and in its original packaging.
Return procedure for MEZD71201A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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