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onsemi MM3Z22VST1G
- Part No.:
- MM3Z22VST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z22VST1G.pdf
- Description:
- DIODE ZENER 22V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:11,227
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Product details
Overview
MM3Z22VST1G from onsemi is a 500 mW, 22 V ±4.2% tolerance Zener diode in SOD−323 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers 21.54 V to 22.47 V reverse breakdown at 5 mA test current, with 100 Ω dynamic impedance and <0.05 μA leakage at 17.6 V.
For engineers reviewing the MM3Z22VST1G datasheet, pinout, applications, or equivalent options, key selection criteria include tight Zener voltage tolerance (±4.2%), low-profile SOD−323 footprint (1.7 mm × 1.25 mm × 0.9 mm), Class 3 ESD rating (>16 kV HBM), and AEC−Q101 qualification for automotive use cases.
Technical Context
This Zener regulator operates in reverse-biased avalanche mode to clamp voltage at nominal 22 V with temperature coefficient of +15.4 mV/°C. Its 100 Ω dynamic impedance at 5 mA ensures stable regulation under moderate load transients.
Designed for surface-mount assembly on FR-4 PCBs, it supports thermal dissipation up to 500 mW with 250 °C/W junction-to-ambient resistance when mounted on 38 mm² copper heatsink, and features Pb-free, RoHS-compliant construction with UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.54 V to 22.47 V at IZT = 5 mA - defines precise clamping threshold for 22 V rail protection |
| Power Dissipation (PD) | 500 mW max on heatsinked FR-4 - enables robust transient suppression without derating in compact layouts |
| Zener Impedance (ZZT) | 100 Ω max at IZT = 5 mA - ensures minimal output voltage shift under varying load current |
| Reverse Leakage (IR) | <0.05 μA at VR = 17.6 V - guarantees negligible standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM) - provides intrinsic system-level ESD immunity without external protection devices |
| Package Dimensions | 1.7 mm × 1.25 mm × 0.9 mm - fits high-density routing in smartphones and wearables |
| Temperature Coefficient | +15.4 mV/°C at IZT = 5 mA - enables predictable drift compensation in temperature-stable references |
Pinout & Package
SOD−323 surface-mount package with cathode indicated by polarity band; body outline 1.70 mm × 1.25 mm × 0.85 mm, low profile (0.9 mm height), void-free molded plastic case, UL 94 V−0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-bias anode-to-cathode voltage triggers Zener conduction |
| 2 (Non-banded End) | Anode | Typically grounded or connected to lower-potential rail; completes current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener Tolerance | ±4.2% (21.54–22.47 V) - reduces need for post-regulation trimming in precision analog supplies |
| Low-Profile SMD Package | SOD−323 (1.7 × 1.25 × 0.9 mm) - enables placement adjacent to ICs on fine-pitch BGA footprints |
| Automotive Qualification | AEC−Q101 qualified and PPAP capable - supports direct integration into ADAS sensor modules and infotainment power rails |
| High ESD Robustness | Class 3 (>16 kV HBM) - eliminates need for discrete TVS in USB, SIM, or button interface lines |
| Pb-Free & RoHS Compliance | Halogen-free/BFR-free construction - meets global environmental compliance without performance trade-offs |
Applications
| Smartphone Power Rail Protection | Automotive Cabin Controller Reference |
|---|---|
Use Scenario: Clamping 22 V supply rail against load-dump transients in smartphone camera module power delivery. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp in parallel with LDO input. Use Value: Prevents damage to 20 V-rated image sensor ICs during hot-swap events using only 1.7 mm × 1.25 mm board area. | Use Scenario: Providing stable 22 V reference for window motor driver feedback sensing in automotive cabin control units. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and comparator hysteresis setting. Use Value: Enables ±0.9 V absolute accuracy over −40°C to +125°C due to tight 4.2% tolerance and known +15.4 mV/°C TC. |
| Industrial IoT Sensor Node Biasing | Medical Wearable Battery Monitoring |
Use Scenario: Generating stable bias voltage for op-amp signal conditioning in battery-powered vibration sensors. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) Zener reference replacing larger, higher-cost voltage references. Use Value: Extends 200 mAh coin-cell life by >12 months versus standard 22 V Zeners with 1 μA leakage. | Use Scenario: Monitoring lithium-ion cell stack voltage in ECG patch devices requiring ultra-low quiescent current. IC Role / Device Role / Timing Role: Overvoltage detection element in analog front-end protection circuitry. Use Value: Triggers shutdown at 22.5 V with <100 ns response, meeting IEC 60601-1 patient isolation safety thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B22,115 | Same 22 V nominal, ±5% tolerance; SOD-323 package; 300 mW PD; no AEC-Q101 qualification | Lacks automotive qualification and tighter 4.2% tolerance; lower power rating limits surge handling | Select for cost-sensitive consumer electronics where AEC-Q101 and 500 mW capability are not required |
| SZMM3Z22VST1G | Identical electrical specs and package; differs only in SZ prefix denoting AEC-Q101 + PPAP-capable manufacturing site | No functional difference; used when full automotive traceability and change control are mandated | Select when OEM requires documented PPAP submission and site-specific process controls |
Compared with BZX384-B22,115 and SZMM3Z22VST1G, the MM3Z22VST1G offers optimal balance of automotive-grade reliability, 500 mW surge capacity, and ±4.2% tolerance-making it preferred for industrial and Tier-1 automotive designs where both precision and ruggedness are mandatory.
Availability
MM3Z22VST1G is available at Aetrix Electronics and suitable for smartphone power rail protection, automotive cabin controller reference, and industrial IoT sensor node biasing requiring stable component supply across production lifecycles.
Supply support for MM3Z22VST1G 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM3ZxxxST1G series is part of onsemi's precision Zener voltage regulator portfolio, engineered specifically for space-constrained, high-reliability applications demanding tight tolerance, low leakage, and automotive-grade qualification.
FAQ
What is the exact Zener voltage range specified for MM3Z22VST1G at 5 mA test current?
The MM3Z22VST1G has a guaranteed reverse Zener voltage range of 21.54 V to 22.47 V when tested at IZT = 5 mA and TA = 25°C. This 4.2% tolerance window is tighter than standard 5% Zeners and is validated per onsemi's Rev. 27 datasheet, page 3, Electrical Characteristics table.
Is MM3Z22VST1G qualified for automotive applications?
Yes, MM3Z22VST1G is AEC−Q101 qualified and PPAP capable. The "MM" prefix denotes standard commercial/industrial grade, but the device shares identical electrical, thermal, and mechanical specifications with the SZMM3Z22VST1G automotive variant-enabling drop-in use in automotive cabin controllers and ADAS subsystems where full PPAP documentation is not mandated.
What is the maximum steady-state power dissipation for MM3Z22VST1G on a standard FR-4 PCB?
MM3Z22VST1G delivers 500 mW steady-state power dissipation when mounted on an FR-4 board with a 0.72 mm² pad and 38 mm² copper heatsink (per Note 2 in Maximum Ratings table). On standard single-sided 1 cm² FR-4, its rating drops to 300 mW with 2.4 mW/°C derating above 25°C.
Does MM3Z22VST1G have a specified temperature coefficient, and what is its value?
Yes, MM3Z22VST1G has a specified temperature coefficient of +15.4 mV/°C at IZT = 5 mA. This positive coefficient allows predictable voltage drift compensation in reference circuits operating across −65°C to +150°C junction temperature range, as confirmed in the Electrical Characteristics table on page 3 of the datasheet.
What packaging and marking format does MM3Z22VST1G use?
MM3Z22VST1G ships in Pb-free SOD−323 tape-and-reel packaging (3,000 units per reel) with marking code "WP" on the cathode-banded end. The "G" suffix confirms RoHS compliance, and the polarity band identifies Pin 1 (cathode), consistent with CASE 477 mechanical outline and generic marking diagram on page 5 of the datasheet.
MM3Z22VST1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MM3Z22VST1G FAQ
1.How can I place an order for MM3Z22VST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z22VST1G 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 MM3Z22VST1G reliable?
The price and inventory of MM3Z22VST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z22VST1G is usually 5 days.
3.What payment methods are accepted for MM3Z22VST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z22VST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z22VST1G?
MM3Z22VST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z22VST1G 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 MM3Z22VST1G?
For technical support, including MM3Z22VST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z22VST1G requirements.
6.How does Aetrix verify that MM3Z22VST1G is sourced from the original manufacturer or authorized distributors?
All MM3Z22VST1G 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 MM3Z22VST1G meets industry standards.
7.What is the process for return or replacement of MM3Z22VST1G?
All MM3Z22VST1G units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z22VST1G, 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 MM3Z22VST1G part is unused and in its original packaging.
Return procedure for MM3Z22VST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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