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Semtech Corporation SC220STRT
- Part No.:
- SC220STRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SC220STRT.pdf
- Description:
- IC REG BUCK ADJ 650MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,258
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Product details
Overview
SC220STRT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range. It protects USB Type-C power delivery buses, load switch inputs, and industrial interfaces where low, flat clamping voltage is critical to avoid controller damage.
For engineers reviewing the SC220STRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability over 40A surge current, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with 22V working voltage systems requiring robust EOS resilience in compact form factors.
Technical Context
The SC220STRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-across 24A to 40A peak pulse currents due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with <20mΩ dynamic resistance (measured 1A–40A, 8/20μs), 130–600nA reverse leakage at 22V, and 175pF capacitance at 1MHz/22V. Its functional architecture enables reliable protection of USB PD, load switches, and industrial power rails without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - Matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - Remains stable across temperature and current, preventing downstream IC overvoltage. |
| Peak Pulse Current | 40A (8/20μs) - Meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Eliminates need for secondary ESD stages in USB Type-C connectors. |
| Junction Capacitance | 175pF at 22V/1MHz - Low enough for 22V power line protection without signal integrity impact. |
| Dynamic Resistance | 20mΩ - Enables low-voltage drop during surge conduction, minimizing power dissipation in FET channel. |
Pinout & Package
SC220STRT is housed in a RoHS-compliant DFN-6 package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad not required-energy is dissipated in the silicon FET structure. All six terminals are electrically active and must be connected per layout guidelines for full 40A rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three pins must be connected to minimize inductance and maximize surge current handling. |
| 4, 5, 6 | IN | Protected line input; tied together to distribute surge current across parallel paths and reduce trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS with active shunt switching-clamping voltage stays flat vs. current/temperature instead of rising linearly. |
| Stable clamping across temperature | 27.5–28V clamping maintained from −40°C to +125°C-enables reliable protection in uncontrolled industrial environments. |
| High-energy surge capability | 1120W peak pulse power (8/20μs) supports repeated lightning-surge events without degradation. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during 40A transients-reduces localized heating and improves reliability. |
| Compact DFN-6 footprint | 1.6mm × 1.6mm area saves >50% board space vs. SOT-23 or SOIC alternatives while maintaining full surge rating. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and surge in docking stations and portable devices. IC Role / Device Role / Timing Role: Primary EOS shunt device placed at connector entry point, clamping transients before they reach PD controller and power switches. Use Value: Maintains 27.5–28V clamping at full 40A surge-well below 30V damage threshold of common PD controllers like TUSB73x or STUSB4500. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end transient clamp on VIN/EN nodes, preventing gate oxide rupture or overvoltage latch-up in integrated FETs. Use Value: Limits clamping to ≤28V across −40°C to +125°C-avoids exceeding 30V absolute maximum ratings of industrial-grade load switches. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways and cellular modems subjected to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-point protection element on main DC input, replacing multi-device TVS+MOV stacks with one monolithic solution. Use Value: Delivers 40A surge handling in 1.6mm² footprint-enables compact, sealed enclosures without thermal management overhead. |
Use Scenario: Shielding 22V backup or auxiliary supplies in NVMe SSD enclosures and enterprise storage controllers from hot-plug transients and ESD. IC Role / Device Role / Timing Role: Standalone clamping device on VCC_AUX or VBAT lines, coordinated with low-capacitance TVS on high-speed lanes. Use Value: 175pF capacitance avoids resonance or signal distortion on adjacent PCIe or SATA traces while providing full 22V system-level protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and pinout-SC220STRT is Semtech's alternate marking for TDS2211P per official ordering documentation. | No functional difference; used interchangeably in BOMs and layouts. | Select SC220STRT when sourcing from Aetrix Electronics-identical performance, same DFN-6 package, full traceability to Semtech Rev 2.5 datasheet. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping, smaller 0.65mm × 0.65mm DFN-2 package. | Better suited for CC/SBU lines in USB-C; insufficient for 22V power rail surge due to lower IPP and higher VC. | Use only for auxiliary signal lines-not a direct replacement for SC220STRT on VBUS or load switch inputs. |
Compared with TDS2211P (identical part), SC220STRT offers identical surge performance and layout compatibility; versus uClamp2411ZA, SC220STRT provides 67% higher peak current rating and 21% lower clamping voltage-critical for protecting 22V power domains where margin is constrained.
Availability
SC220STRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch protection, and IoT edge node power bus designs requiring stable component supply with full surge compliance and compact footprint.
Supply support for SC220STRT 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 SC220STRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes with FET-based active clamping for flat-voltage, high-energy EOS protection in space-constrained, thermally demanding applications.
FAQ
What is the exact package type and dimensions of SC220STRT?
SC220STRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no thermal pad required. Pins 1–3 are GND; pins 4–6 are IN. The land pattern follows Semtech's recommended layout with multiple vias to ground plane and direct trace routing from connector to device-critical to achieve full 40A surge rating. SC220STRT's compact size enables placement directly at USB-C or industrial connector entry points.
How does SC220STRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SC220STRT maintains a near-constant 27.5–28V clamping voltage from 24A to 40A due to its FET-based architecture and decreasing RDS(on). This eliminates design uncertainty caused by temperature-induced clamping drift-SC220STRT delivers consistent protection across −40°C to +125°C without derating.
Can SC220STRT be used to protect USB Type-C VBUS lines operating at 20V PD?
Yes-SC220STRT is explicitly validated for USB Type-C power delivery protection in Semtech's application notes. With a 22V working voltage and 27.5–28V clamping at 40A, it safely limits transients below the 30V damage threshold of common PD controllers. Its ±30kV ESD rating also satisfies IEC 61000-4-2 requirements for connector-level immunity without additional staging.
What is the junction capacitance of SC220STRT and how does it affect circuit design?
SC220STRT exhibits 175pF junction capacitance at 22V and 1MHz. This value is optimized for 22V power-line protection-low enough to avoid resonance or filtering effects on adjacent high-speed signals (e.g., USB SS, PCIe), yet high enough to ensure robust surge energy absorption. Layout best practice is to isolate SC220STRT from sensitive RF or data traces by ≥2mm clearance and ground guard rings.
Is SC220STRT pin-compatible with other Semtech TDS devices like TDS2411P?
No-SC220STRT (TDS2211P) is not pin-compatible with TDS2411P. While both use 6-pin DFN packages, TDS2411P has different voltage ratings (24V VRWM), clamping (30V), and internal trigger thresholds. Pin mapping is identical (GND on 1–3, IN on 4–6), but substituting SC220STRT for TDS2411P risks under-clamping on 24V systems, and vice versa may fail to trigger reliably on 22V rails. Always verify working voltage match before substitution.
SC220STRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- X-EMI™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 650mA
- Frequency - Switching:
- 20MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SC220STRT FAQ
1.How can I place an order for SC220STRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC220STRT 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 SC220STRT reliable?
The price and inventory of SC220STRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC220STRT is usually 5 days.
3.What payment methods are accepted for SC220STRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC220STRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC220STRT?
SC220STRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC220STRT 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 SC220STRT?
For technical support, including SC220STRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC220STRT requirements.
6.How does Aetrix verify that SC220STRT is sourced from the original manufacturer or authorized distributors?
All SC220STRT 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 SC220STRT meets industry standards.
7.What is the process for return or replacement of SC220STRT?
All SC220STRT units undergo pre-shipment inspection (PSI). If there is an issue with SC220STRT, 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 SC220STRT part is unused and in its original packaging.
Return procedure for SC220STRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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