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Semtech Corporation TDS2221PW.C
- Part No.:
- TDS2221PW.C
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
TDS2221PW.C.pdf
- Description:
- SURGESWITCH, 1-LINE 22V EOS PROT
- Quantity:
- Payment:
- Shipping:
Inventory:9,674
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Product details
Overview
TDS2221PW.C from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 22V VBUS or I/O lines, featuring ±15kV contact / ±30kV air ESD rating per IEC 61000-4-2, 22A peak pulse current (8/20μs), 26.5–28V clamping voltage at 22A, and 12mΩ dynamic resistance. It uses a surge-rated FET as the shunt element to deliver stable clamping across current range and is deployed in USB Type-C power delivery paths.
For engineers reviewing the TDS2221PW.C datasheet, pinout, applications, or equivalent options, key selection criteria include its 22V working voltage, ultra-low dynamic resistance, DFN 1.6×1.0mm 2-lead package with side-wettable flanks, and compliance with IEC 61000-4-5 (±1kV, RS=42Ω) and IEC 61000-4-2.
Technical Context
The TDS2221PW.C employs a triggered FET-based architecture: a precision trigger circuit activates a low-RDS(on) shunt FET when transient voltage exceeds ~26.3V breakdown, enabling near-constant clamping voltage over 1–22A (8/20μs). Its solid-state design eliminates leakage and capacitance trade-offs typical of avalanche diodes.
Unlike conventional TVS diodes, it achieves 98pF junction capacitance at 22V and maintains clamping stability across –40°C to +125°C operating temperature, with <200nA reverse leakage at VRWM and 0.6V forward voltage - critical for protecting sensitive 22V power rails without signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 22V - defines maximum continuous DC bus voltage before activation; matches USB PD 22V VBUS systems. |
| Clamping Voltage (VC) | 26.5–28V at 22A (8/20μs) - ensures protected ICs see sub-28V stress during worst-case surges. |
| Peak Pulse Current | 22A (8/20μs), 2.0A (10/1000μs) - supports industrial surge immunity per IEC 61000-4-5 Level 3. |
| ESD Rating | ±15kV contact / ±30kV air (IEC 61000-4-2) - exceeds USB Type-C ESD requirements for hot-plug robustness. |
| Dynamic Resistance | 12mΩ - enables flat clamping curve and minimizes voltage overshoot under fast-rising transients. |
| Junction Capacitance | 98pF at 22V, 1MHz - low enough for USB 2.0 data line compatibility when used on VBUS-only paths. |
| Package | DFN 1.6 × 1.0 × 0.55 mm, 2-lead - enables ultra-compact placement adjacent to connectors with side-wettable flanks for solder inspection. |
Pinout & Package
Package: DFN 1.6 × 1.0 × 0.55 mm, 2-lead, side-wettable flanks, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Protection Input | Connected to protected 22V bus (e.g., USB Type-C VBUS); transient energy enters here before being diverted to GND. |
| 2 (GND) | Ground Return | Low-inductance path to system ground; requires multiple vias for optimal surge current handling and thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces avalanche diode clamping with active shunt switching for stable VC across full IPP range. |
| Ultra-low dynamic resistance | 12mΩ ensures minimal IR drop during 22A surge, reducing clamping voltage rise and improving margin for 22V ICs. |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints on 2-lead DFN - critical for high-reliability USB-C manufacturing. |
| High-energy surge rating | 616W peak pulse power (8/20μs) supports repeated exposure to IEC 61000-4-5 Level 3 surges without degradation. |
| Low leakage & capacitance | ≤200nA IR at 22V and 98pF CJ enable use on always-on 22V rails without standby power penalty or signal integrity impact. |
Applications
| USB Type-C Power Delivery | Industrial IoT Sensor Hubs |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles exposed to hot-plug ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS/ESD shunt protector placed between connector and power switch or PMIC input. Use Value: Clamps transients to ≤28V while delivering 22A surge current, preserving downstream 22V-rated load switches and buck converters. |
Use Scenario: Securing 22V auxiliary power inputs on edge gateways subjected to field-installed cable surges. IC Role / Device Role / Timing Role: Standalone high-energy suppressor on main DC input rail upstream of DC-DC converters. Use Value: Withstands repeated ±1kV (IEC 61000-4-5) surges without parameter shift, ensuring long-term reliability in ungrounded deployments. |
| Automotive Body Control Modules | Medical Portable Charging Stations |
Use Scenario: Protecting 22V battery-fed lighting or actuator drivers against load-dump coupling and ESD from service ports. IC Role / Device Role / Timing Role: Secondary-level surge clamp on non-critical 22V distribution nodes where TVS diodes fail prematurely. Use Value: 125°C max operating temperature and stable clamping across temperature ensure consistent protection in under-hood environments. |
Use Scenario: Safeguarding 22V Li-ion battery charging inputs in portable medical devices during hospital-grade ESD events. IC Role / Device Role / Timing Role: Final-stage ESD barrier before battery management ICs, leveraging ±30kV air discharge rating. Use Value: 98pF capacitance avoids interference with charge termination sensing; low leakage prevents battery drain during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 33.2V VBR, 37.1V VC @ 12.9A; higher clamping, no FET control. | Larger 200pF capacitance; unsuitable for high-speed or low-leakage 22V rails. | Lower cost but sacrifices clamping performance and thermal stability; best for cost-sensitive, non-critical 22V lines. |
| TDS2221PWC | Same die, identical specs; differs only in reel quantity (10,000 vs. 3,000) and tape width - functionally identical part. | No functional difference; same footprint, marking, and electrical behavior. | Select TDS2221PWC only for volume procurement requiring larger reels; TDS2221PW.C is preferred for prototyping and mid-volume builds. |
Compared with SMAJ22A and TDS2221PWC, the TDS2221PW.C delivers superior clamping (28V vs. 37.1V), lower dynamic impedance (12mΩ vs. >100mΩ), and tighter temperature stability - making it the optimal choice for protecting sensitive 22V power rails where voltage margin and reliability are critical.
Availability
TDS2221PW.C is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial IoT sensor hubs, and automotive body control modules requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for TDS2221PW.C 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The TDS2221PW.C belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace traditional TVS diodes with FET-based active clamping for high-energy EOS/ESD protection in compact, thermally robust packages.
FAQ
What is the primary protection function of the TDS2221PW.C?
The TDS2221PW.C functions as a transient diverting suppressor that actively shunts high-energy EOS and ESD events to ground using an integrated surge-rated FET. Unlike passive TVS diodes, it triggers at ~26.3V and maintains a stable clamping voltage of 26.5–28V up to 22A, making it ideal for safeguarding 22V power rails in USB-C and industrial systems. The TDS2221PW.C achieves this via low 12mΩ dynamic resistance and precise trigger circuitry.
Does the TDS2221PW.C meet IEC 61000-4-5 surge immunity standards?
Yes, the TDS2221PW.C is rated for ±1kV surge testing per IEC 61000-4-5 with RS = 42Ω and CS = 0.5μF, delivering 22A peak pulse current (8/20μs). Its 616W peak pulse power rating and stable clamping across temperature ensure reliable compliance in industrial and automotive environments. The TDS2221PW.C has been validated to sustain repeated surges without parameter drift or failure.
Can the TDS2221PW.C be used on data lines such as USB 2.0 differential pairs?
No - the TDS2221PW.C is designed exclusively for single-line 22V power rail protection (e.g., VBUS), not data lines. Its 98pF junction capacitance is too high for high-speed differential signaling and would distort eye diagrams. For USB 2.0 data line protection, Semtech offers dedicated low-capacitance arrays like the RClamp® series. The TDS2221PW.C must be placed only on IN-to-GND paths with verified 22V DC bias.
What is the significance of side-wettable flanks in the TDS2221PW.C package?
Side-wettable flanks on the TDS2221PW.C's DFN 1.6×1.0mm package allow automated optical inspection (AOI) of solder fillets on both side edges - a critical quality assurance feature for high-reliability USB-C manufacturing. This eliminates reliance on X-ray for verifying solder joint integrity and supports IPC-A-610 Class 2/3 compliance. The TDS2221PW.C's flank geometry is optimized for standard reflow profiles and Type 4 solder paste.
How does the TDS2221PW.C compare to standard TVS diodes in clamping performance?
The TDS2221PW.C clamps at 26.5–28V under 22A (8/20μs), whereas standard TVS diodes like SMAJ22A clamp at 37.1V under 12.9A - a 9–10V advantage. This results from the TDS2221PW.C's 12mΩ dynamic resistance and active FET shunt, which avoids the exponential V-I curve of avalanche diodes. The TDS2221PW.C also exhibits flatter clamping across temperature and current, enhancing protection margin for modern 22V ICs.
TDS2221PW.C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 2-UDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V (Max)
- Voltage - Breakdown (Min):
- 23V
- Voltage - Clamping (Max) @ Ipp:
- 28V
- Current - Peak Pulse (10/1000µs):
- 2A
- Power - Peak Pulse:
- 616W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 98pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x1)
TDS2221PW.C FAQ
1.How can I place an order for TDS2221PW.C through Aetrix?
Please submit a Request for Quotation (RFQ) for TDS2221PW.C 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 TDS2221PW.C reliable?
The price and inventory of TDS2221PW.C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDS2221PW.C is usually 5 days.
3.What payment methods are accepted for TDS2221PW.C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDS2221PW.C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDS2221PW.C?
TDS2221PW.C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDS2221PW.C 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 TDS2221PW.C?
For technical support, including TDS2221PW.C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDS2221PW.C requirements.
6.How does Aetrix verify that TDS2221PW.C is sourced from the original manufacturer or authorized distributors?
All TDS2221PW.C 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 TDS2221PW.C meets industry standards.
7.What is the process for return or replacement of TDS2221PW.C?
All TDS2221PW.C units undergo pre-shipment inspection (PSI). If there is an issue with TDS2221PW.C, 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 TDS2221PW.C part is unused and in its original packaging.
Return procedure for TDS2221PW.C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDS2221PW.C Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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