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onsemi MM3Z2V7ST1
- Part No.:
- MM3Z2V7ST1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z2V7ST1.pdf
- Description:
- DIODE ZENER 2.7V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,976
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Product details
Overview
MM3Z2V7ST1 from onsemi is a 2.7 V ±3.7% Zener diode in SOD−323 package, rated for 200 mW steady-state power dissipation, with 100 Ω maximum dynamic impedance at 5 mA test current and −3.5 mV/°C temperature coefficient. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rail clamping and USB interface overvoltage protection.
For engineers reviewing the MM3Z2V7ST1 datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 2.67–2.91 V Zener tolerance at 5 mA, 450 pF capacitance at 0 V bias, Class 3 ESD rating (>16 kV HBM), low 0.9 V forward voltage at 10 mA, and SOD−323 footprint compatibility with high-density PCB layouts.
Technical Context
The MM3Z2V7ST1 operates as a two-terminal voltage reference device, conducting in reverse breakdown to clamp or regulate voltage across sensitive circuit nodes. Its Zener mechanism delivers stable 2.7 V regulation with minimal drift over temperature (−3.5 mV/°C) and low dynamic impedance (100 Ω @ IZT = 5 mA).
Designed for surface-mount integration, it features cathode polarity marking, Pb-free plating options, UL 94 V−0 flammability rating, and soldering compatibility up to 260°C for 10 seconds. Thermal resistance is 635°C/W (junction-to-ambient, FR-5 board), supporting reliable operation within −65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.67–2.91 V at 5 mA - defines precise clamping threshold for low-voltage rails |
| Power Dissipation | 200 mW @ 25°C - limits continuous energy handling in compact SOD−323 body |
| Zener Impedance (ZZT) | 100 Ω max @ 5 mA - ensures minimal voltage shift under load variation |
| Temperature Coefficient | −3.5 mV/°C - quantifies VZ drift per degree Celsius near room temperature |
| Capacitance | 450 pF max @ 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in automated assembly and end-use environments |
| Forward Voltage | 0.9 V max @ 10 mA - defines conduction loss when used in forward-biased protection paths |
Pinout & Package
SOD−323 package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode marked by band on terminal 1. Compatible with standard reflow profiles and tape-and-reel (3000 units/reel) handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded) | Cathode | Connected to regulated output node; reverse-bias voltage applied here for Zener conduction |
| 2 | Anode | Connected to ground or lower-potential reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener Tolerance | ±3.7% (2.67–2.91 V) - reduces need for post-production calibration in voltage-reference circuits |
| Low Profile Packaging | 0.9 mm height - enables placement beneath connectors or in stacked-board assemblies |
| High ESD Robustness | Class 3 (>16 kV HBM) - eliminates external ESD protection in many consumer interface designs |
| Pb-Free Options | MM3Z2V7ST1G available - supports RoHS-compliant manufacturing without performance trade-off |
| Thermal Stability | −65°C to +150°C operating range - sustains regulation in automotive cabin and industrial edge environments |
Applications
| USB 2.0 Data Line Protection | Smartphone Battery Monitor Reference |
|---|---|
Use Scenario: Clamping transient spikes on D+ and D− lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Two-terminal shunt regulator placed between data line and ground. Use Value: 450 pF capacitance avoids signal integrity degradation at 480 Mbps; 2.7 V threshold protects 3.3 V tolerant PHYs without false triggering. |
Use Scenario: Providing stable reference voltage for fuel-gauge ADC inputs monitoring Li-ion cell voltage. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end measurement. Use Value: ±3.7% tolerance and −3.5 mV/°C TC enable <1% total error over 0–45°C ambient, eliminating need for digital calibration. |
| IoT Sensor Node Power Rail Clamp | Wearable Heart Rate Monitor Bias Supply |
Use Scenario: Limiting 3.3 V supply excursions caused by switching noise from BLE radio bursts. IC Role / Device Role / Timing Role: Low-power shunt limiter on microcontroller VDD rail. Use Value: 200 mW rating handles short-duration surges; SOD−323 footprint saves >0.8 mm² vs. SOT-23 in ultra-thin wristband PCBs. |
Use Scenario: Generating stable 2.7 V bias for photodiode transimpedance amplifier in optical PPG sensing. IC Role / Device Role / Timing Role: Low-noise DC reference for analog signal chain biasing. Use Value: 100 Ω ZZT minimizes ripple coupling into sensitive analog stages; 0.9 V forward drop allows safe reverse recovery during sensor sleep/wake transitions. |
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-B2V7 | 2.7 V ±5%, 300 mW rating, SOD-323 package, 120 Ω ZZT @ 5 mA | Higher power margin but looser tolerance; higher dynamic impedance affects regulation accuracy | Preferred where surge energy absorption is prioritized over precision clamping |
| MMSZ4678T1G | 2.7 V ±5%, 500 mW rating, SOD-123 package, 100 Ω ZZT @ 20 mA | Larger footprint (3.5 mm × 1.6 mm); requires higher test current for spec compliance | Chosen when thermal derating for sustained 150 mW operation is required and board area permits |
Compared with BZX384-B2V7 and MMSZ4678T1G, the MM3Z2V7ST1 offers tighter voltage tolerance and lower capacitance in the smallest standardized SOD−323 outline-making it optimal for high-density, low-voltage, high-speed interface protection where layout area and signal fidelity are constrained.
Availability
MM3Z2V7ST1 is available at Aetrix Electronics and suitable for USB interface protection, smartphone battery monitoring, and wearable sensor biasing requiring stable component supply and consistent parametric performance across production lots.
Supply support for MM3Z2V7ST1 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient technologies for automotive, industrial, cloud, and IoT applications.
The MM3Z2V7ST1 belongs to the MM3ZxxxST1 series of precision Zener regulators designed specifically for space-constrained, low-power voltage reference and overvoltage protection in portable and battery-powered systems.
FAQ
What is the Zener voltage tolerance of MM3Z2V7ST1?
The MM3Z2V7ST1 has a specified Zener voltage range of 2.67 V to 2.91 V at 5 mA test current, corresponding to a ±3.7% tolerance about the nominal 2.7 V value. This tight tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet (Rev. 9, July 2004). The MM3Z2V7ST1 achieves this via process-controlled doping and trim techniques unique to the MM3ZxxxST1 series.
Can MM3Z2V7ST1 be used in place of MM3Z2V4ST1?
No - the MM3Z2V7ST1 is not a direct substitute for MM3Z2V4ST1 due to differing Zener voltages (2.7 V vs. 2.4 V), distinct device markings (T3 vs. T2), and non-overlapping regulation thresholds. Circuit functionality relying on 2.4 V clamping will fail if MM3Z2V7ST1 is substituted. The MM3Z2V7ST1 must be selected only where 2.7 V regulation is explicitly required and validated in the target application.
What is the maximum reverse leakage current for MM3Z2V7ST1 at 1 V?
The MM3Z2V7ST1 exhibits a maximum reverse leakage current (IR) of 1.0 µA at VR = 1 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal standby power draw in always-on circuits like real-time clock backup rails or sensor wake-up monitors, preserving battery life in portable devices using the MM3Z2V7ST1.
Is MM3Z2V7ST1 RoHS compliant?
Yes - the MM3Z2V7ST1 is available in both standard (SnPb-plated) and Pb-free versions. The Pb-free variant is designated MM3Z2V7ST1G and meets RoHS Directive 2011/65/EU requirements. Both variants share identical electrical specifications and SOD−323 mechanical dimensions, allowing drop-in replacement in compliant manufacturing flows without redesign.
What is the thermal resistance (RJA) of MM3Z2V7ST1 on FR-5 board?
The MM3Z2V7ST1 has a junction-to-ambient thermal resistance (RJA) of 635°C/W when mounted on an FR-5 printed circuit board, as stated in the Maximum Ratings table. This value assumes standard copper pad layout per JEDEC guidelines and defines the temperature rise per milliwatt dissipated - critical for calculating safe operating area in thermally isolated sections of PCBs using the MM3Z2V7ST1.
MM3Z2V7ST1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±4%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MM3Z2V7ST1 FAQ
1.How can I place an order for MM3Z2V7ST1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z2V7ST1 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 MM3Z2V7ST1 reliable?
The price and inventory of MM3Z2V7ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z2V7ST1 is usually 5 days.
3.What payment methods are accepted for MM3Z2V7ST1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z2V7ST1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z2V7ST1?
MM3Z2V7ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z2V7ST1 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 MM3Z2V7ST1?
For technical support, including MM3Z2V7ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z2V7ST1 requirements.
6.How does Aetrix verify that MM3Z2V7ST1 is sourced from the original manufacturer or authorized distributors?
All MM3Z2V7ST1 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 MM3Z2V7ST1 meets industry standards.
7.What is the process for return or replacement of MM3Z2V7ST1?
All MM3Z2V7ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z2V7ST1, 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 MM3Z2V7ST1 part is unused and in its original packaging.
Return procedure for MM3Z2V7ST1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MM3Z2V7ST1 Tags
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