My Inquiry
My Account
Monolithic Power Systems Inc. MEZD71203A-B
- Part No.:
- MEZD71203A-B
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Converters
- Package:
- 3-SIP Module
- Datasheet:
-
MEZD71203A-B.pdf
- Description:
- DC DC CONVERTER 1.2V
- Quantity:
- Payment:
- Shipping:
Inventory:2,351
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MEZD71203A-B from Monolithic Power Systems is a 3A, synchronous step-down DC/DC power supply module with fixed 1.2V output, 5–16V input range, ±2.5% output voltage accuracy, 400kHz switching frequency, and hiccup-mode short-circuit protection - deployed in industrial control power rails and FPGA core supplies.
For engineers reviewing the MEZD71203A-B datasheet, MEZD71203A-B pinout, MEZD71203A-B application, or MEZD71203A-B equivalent, key selection criteria include input voltage headroom (VIN > VOUT +1V), thermal derating above 85°C ambient, hiccup recovery behavior under sustained fault, and compatibility with 0402/0805 passive footprints in DIY board integration.
Technical Context
The MEZD71203A-B integrates a controller, power MOSFETs, and compensation into a fully shielded FCQFN3x3-16 package. It operates in forced PWM mode with internal 400kHz oscillator and supports output voltages selectable via part number suffix (B = 1.2V).
It implements over-current protection via valley-current limiting, OTP at 150°C with hysteresis, and line/load regulation better than ±1% (typ.) at 3.3V output. Input-to-output voltage differential must exceed 1V for stable operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5V to 16V - requires ≥1V headroom above output; invalid below 5V or above 16V absolute max. |
| Output Voltage | 1.2V (fixed by B-suffix) - set internally; no external resistor divider required. |
| Max Output Current | 3A continuous - derated linearly above 85°C ambient per published power derating curve. |
| Switching Frequency | 400kHz (typ.) - enables compact 3.3µH inductor and low-ESR ceramic output capacitors. |
| Output Voltage Accuracy | ±2.5% (typ.) - includes initial tolerance, line/load/temp drift; impacts downstream logic margin. |
| Short-Circuit Response | Hiccup mode - cycles ON/OFF until fault clears; prevents thermal runaway during sustained shorts. |
| Operating Temp Range | −40°C to +85°C - specified for full electrical performance; OTP triggers at 150°C junction. |
Pinout & Package
Package: FCQFN3x3-16 (fully molded, exposed thermal pad, 0.5mm pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main input power connection - decoupled externally with 0.22µF + 4.7µF ceramics per reference design. |
| 2 | GND | Power ground - tied directly to thermal pad; forms low-inductance return path for high di/dt currents. |
| 3 | VOUT | Regulated output - routed with low-impedance trace; filtered by dual 22µF X7T/X5R 0805 caps. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Topology | Integrated high/low-side MOSFETs eliminate external Schottky loss; enables >90% efficiency at 2A/3.3V. |
| Open Design Files | Gerber, BOM, and schematic provided - accelerates layout validation and custom footprint adaptation. |
| Hiccup Short-Circuit Protection | Auto-recovery after fault removal - avoids latch-off in transient overload conditions like hot-plug events. |
| Thermal Shutdown with Hysteresis | 150°C trip, ~20°C hysteresis - prevents cycling near thermal limit; allows safe restart after cooldown. |
| Wide Input Range Support | 5–16V operation - accommodates 12V nominal rails with brown-out margin and 5V USB-powered test setups. |
Applications
| Industrial PLC I/O Module Power | FPGA Core Supply |
|---|---|
Use Scenario: Powering isolated digital I/O banks in programmable logic controllers with variable load current (0.5–2.8A). IC Role / Device Role / Timing Role: Primary 1.2V core regulator for microcontroller and level-shifting logic. Use Value: Stable 1.2V rail maintains timing margins across −40°C to 70°C operating range; hiccup mode prevents system lockup during field-wiring faults. | Use Scenario: Delivering clean 1.2V to Artix-7 FPGA core banks under dynamic switching loads. IC Role / Device Role / Timing Role: Point-of-load (POL) DC/DC converter adjacent to FPGA BGA package. Use Value: 400kHz switching enables small 3.3µH inductor; ±2.5% accuracy ensures compliance with Xilinx core voltage tolerance (1.2V ±3%). |
| Medical Sensor Hub Power | Test & Measurement Equipment Rail |
Use Scenario: Supplying analog front-end and ADC subsystems in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise 1.2V source for precision SAR ADC reference and bias circuitry. Use Value: 30.4mVpp ripple at 3.3V/3A translates to sub-10µV noise contribution at 1.2V output; meets EN 60601-1 EMI limits. | Use Scenario: Generating stable 1.2V for high-speed DAC clock drivers in automated test equipment. IC Role / Device Role / Timing Role: Dedicated low-jitter power rail for clock distribution ICs. Use Value: <1% line/load regulation minimizes supply-induced jitter; fast 0.8ms rise time supports power sequencing with µC-controlled enable. |
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 | Same manufacturer, pin-compatible successor; 4.5–18V input, 3A, integrated inductor, 1.2V fixed option available. | End-of-life replacement with identical PCB footprint and thermal profile; supports higher VIN max. | Select MPM3530 for new designs requiring long-term availability and extended input range. |
| TPSM84203 | Texas Instruments 3A module; 4.5–17V input, 1.2V fixed; uses different pinout (EN/VIN/GND/VOUT sequence) and larger 4x4mm QFN. | Requires PCB redesign; offers tighter ±1% output accuracy and lower 25µA quiescent current. | Choose TPSM84203 only when higher accuracy or ultra-low IQ is mandatory and layout revision is acceptable. |
Compared with MPM3530, MEZD71203A-B lacks extended VIN range and newer thermal management features; versus TPSM84203, it trades accuracy and IQ for footprint compatibility and hiccup-mode robustness in harsh environments.
Availability
MEZD71203A-B is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA core supplies, medical sensor hubs, and test equipment requiring stable component supply despite end-of-life status.
Supply support for MEZD71203A-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 mEZD71203A series targets space-constrained, medium-power DC/DC conversion where rapid prototyping and open-design flexibility are prioritized over ultra-high efficiency or ultra-low IQ.
FAQ
Is MEZD71203A-B still in production?
No - MEZD71203A-B is officially End-of-Life per MPS documentation. Aetrix Electronics holds remaining authorized inventory and supports legacy design continuity, but recommends migrating to MPM3530 for new projects.
What is the recommended input capacitor configuration?
MPS specifies a 0.22µF 0402 ceramic (C1) plus 4.7µF 1206 ceramic (C2) at VIN. These provide high-frequency bypass and bulk energy storage; both must be placed within 3mm of pins 1 and 2 to minimize switching loop inductance.
Can MEZD71203A-B be used with 24V input?
No - absolute maximum input voltage is 16V. Applying 24V will cause immediate failure. For 24V systems, consider mEZD71202A-X (4.5–24V, 2A) or MPM3530 (4.5–18V, 3A) instead.
Does it require an external feedback resistor network?
No - MEZD71203A-B has factory-trimmed 1.2V output. The B-suffix denotes fixed internal feedback; no external resistors are needed or supported for voltage adjustment.
How does hiccup-mode protection behave during repeated short circuits?
Upon short detection, the device shuts down, cools briefly (~100ms), then attempts restart. If the fault persists, it repeats the cycle indefinitely - preventing thermal damage while maintaining system observability via enable pin toggling.
What is the minimum load requirement?
None - MEZD71203A-B operates down to zero load. Load regulation is specified from minimum to maximum output current, and light-load efficiency remains >75% at 10mA with 12V input and 1.2V output.
Is the thermal pad electrically connected?
Yes - the exposed thermal pad (pin 16) is internally connected to GND. It must be soldered to a solid copper pour on the PCB for both thermal conduction and electrical grounding; floating the pad causes thermal shutdown and instability.
MEZD71203A-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):
- 5V
- Voltage - Input (Max):
- 16V
- Voltage - Output 1:
- 1.2V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 3A
- 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:
- -
MEZD71203A-B FAQ
1.How can I place an order for MEZD71203A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for MEZD71203A-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 MEZD71203A-B reliable?
The price and inventory of MEZD71203A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MEZD71203A-B is usually 5 days.
3.What payment methods are accepted for MEZD71203A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MEZD71203A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MEZD71203A-B?
MEZD71203A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MEZD71203A-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 MEZD71203A-B?
For technical support, including MEZD71203A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MEZD71203A-B requirements.
6.How does Aetrix verify that MEZD71203A-B is sourced from the original manufacturer or authorized distributors?
All MEZD71203A-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 MEZD71203A-B meets industry standards.
7.What is the process for return or replacement of MEZD71203A-B?
All MEZD71203A-B units undergo pre-shipment inspection (PSI). If there is an issue with MEZD71203A-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 MEZD71203A-B part is unused and in its original packaging.
Return procedure for MEZD71203A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MEZD71203A-B Tags
-
1S4E_0505S1.5U
GAPTEC Electronic
-
TPS631000DRLR
Texas Instruments
-
XCL209F083DR
Torex Semiconductor Ltd
-
SC202AMLTRT
Semtech Corporation
-
NME1S0505SC
Murata Power Solutions Inc.
-
XCL101A501ER-G
Torex Semiconductor Ltd
-
RFM-0505S
Recom Power
-
TEA 1-0505E
Traco Power
-
MIC33153YHJ-TR
Microchip Technology
-
TEA 1-0505
Traco Power
-
TPSM863252RDXR
Texas Instruments
-
RFB-0505S
Recom Power
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
