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Semtech Corporation SC283WLTRT
- Part No.:
- SC283WLTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 18-WFQFN Exposed Pad
- Datasheet:
-
SC283WLTRT.pdf
- Description:
- IC REG BUCK PROG 1.8A DL 18MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:11,747
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Product details
Overview
SC283WLTRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range. Used in USB Type-C PD input protection to safeguard controllers from voltage overshoot.
For engineers reviewing the SC283WLTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, low dynamic resistance (20mΩ), junction capacitance (175pF at 22V), and DFN 1.6×1.6mm 6-lead package compatibility with high-density USB PD and industrial load switch layouts.
Technical Context
The SC283WLTRT employs a surge-rated FET as its primary protection element, activated by a precision trigger circuit upon detection of overvoltage. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-across 24A to 40A surge currents due to decreasing RDS(on) under stress.
It operates from −40°C to +125°C with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and reverse leakage ≤600nA at VRWM. Its functional architecture isolates transient energy via shunt conduction to ground through three parallel IN pins (4–6) and three GND pins (1–3), requiring full-pin connection for rated performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous bus voltage before activation; matches USB PD VBUS nominal + margin. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements with RS = 42Ω. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds smartphone/tablet and industrial interface ESD robustness requirements. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on DC/low-frequency lines. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping curve; critical for maintaining consistent protection across temperature and current extremes. |
Pinout & Package
SC283WLTRT is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with wettable flank terminations. The compact footprint enables placement adjacent to USB Type-C connectors or load switch inputs with minimal PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current handling and minimize inductance. |
| Pin 4, 5, 6 | IN | Protected line input (e.g., VBUS or load switch VIN); parallel connection ensures uniform current sharing and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates design margin inflation needed with traditional TVS diodes. |
| Temperature-stable protection | Clamping holds at ~27.6V from −40°C to +125°C - enables reliable operation in automotive cabins or industrial enclosures without derating. |
| Low dynamic resistance | 20mΩ enables sub-1V voltage drop at 40A - reduces thermal stress and improves energy diversion efficiency vs. TVS junction dissipation. |
| High-energy surge capability | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge events per IEC 61000-4-5 without degradation. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBUS line of a USB Type-C port supporting up to 20V/5A PD negotiation against ESD and surge events. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller or load switch input. Use Value: Maintains clamping at 27.6V across temperature and 40A surge, preventing controller latch-up or gate oxide damage that occurs above 30V. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters or robotics against induced surges on long cables. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by the load switch's internal FET drain. Use Value: Prevents avalanche failure of the load switch by holding input voltage ≤28V during 1.2/50μs + 8/20μs combination wave surges. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet Main Power Bus Protection |
Use Scenario: Securing 22V-capable power rails in battery-powered IoT gateways exposed to ESD during field servicing or docking. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main DC input, upstream of PMIC or buck converter. Use Value: Delivers ±30kV ESD immunity without adding series impedance or capacitance that would affect startup sequencing or regulation stability. |
Use Scenario: Protecting the 20V system rail in ultrabooks and 2-in-1 tablets where space-constrained layouts demand minimal footprint protection. IC Role / Device Role / Timing Role: Compact DFN-based shunt device placed directly at board edge near power connector. Use Value: 1.6×1.6mm footprint saves >60% area versus SOT-23 TVS solutions while delivering superior clamping consistency and surge endurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN 1.6×1.6mm package, identical pinout and marking (T22 code), same tape-and-reel packaging (3,000/reel). | No functional difference; TDS2211P.C is the standard orderable variant of the same die and assembly. | Select TDS2211P.C when sourcing from authorized Semtech distributors; SC283WLTRT may reflect alternate branding or logistics channel but shares full form-fit-function equivalence. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, no constant-voltage behavior, 200pF capacitance. | Limited to lower-energy transients; clamping rises with temperature and current-unsuitable for 40A or high-temp industrial use. | Consider only for cost-sensitive, non-critical 22V lines where 35.5V clamping is acceptable and surge energy is <50% of SC283WLTRT's rating. |
Compared with SC283WLTRT, TDS2211P.C offers identical protection performance and layout compatibility, while SMAJ22A provides lower-cost surge suppression at the expense of clamping stability, temperature resilience, and peak current capability-making it unsuitable for USB PD or industrial load switch front-end roles.
Availability
SC283WLTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT power rail protection requiring stable component supply, high-volume traceability, and long-term lifecycle support.
Supply support for SC283WLTRT 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 high-performance analog and mixed-signal semiconductors for power management, protection, and signal integrity.
SC283WLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection applications demanding flat clamping and temperature stability.
FAQ
What is the exact package type and dimensions of SC283WLTRT?
SC283WLTRT uses a DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads. Pin 1–3 are GND; Pin 4–6 are IN. The package features wettable flanks and Pb-free, RoHS-compliant construction. Land pattern and outline drawings are provided in Semtech's official datasheet Rev 2.5.
Does SC283WLTRT require external bias or control signals to operate?
No, SC283WLTRT is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET-no external power, enable pins, or configuration are needed. Activation occurs automatically when input voltage exceeds the internal breakdown threshold (~25–27.9V).
How does SC283WLTRT differ from standard TVS diodes in clamping behavior?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC283WLTRT maintains ~27.6V clamping from 24A to 40A due to its FET-based architecture and decreasing RDS(on). This eliminates design uncertainty caused by temperature- and current-dependent clamping drift in conventional TVS devices.
Can SC283WLTRT protect bidirectional data lines like USB DP/DM?
No, SC283WLTRT is designed exclusively for unidirectional 22V power or I/O line protection (e.g., VBUS, load switch input). For high-speed data lines such as USB SuperSpeed, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF), not SC283WLTRT.
Is SC283WLTRT suitable for automotive applications?
SC283WLTRT operates from −40°C to +125°C and meets IEC 61000-4-2/4-4/4-5 standards, making it technically viable for under-hood or cabin-located industrial-grade modules. However, it is not AEC-Q200 qualified; for automotive safety-critical systems, consult Semtech's automotive-qualified portfolio separately.
SC283WLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 18-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 1.8A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-MLPQ-W (2x3)
SC283WLTRT FAQ
1.How can I place an order for SC283WLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC283WLTRT 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 SC283WLTRT reliable?
The price and inventory of SC283WLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC283WLTRT is usually 5 days.
3.What payment methods are accepted for SC283WLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC283WLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC283WLTRT?
SC283WLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC283WLTRT 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 SC283WLTRT?
For technical support, including SC283WLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC283WLTRT requirements.
6.How does Aetrix verify that SC283WLTRT is sourced from the original manufacturer or authorized distributors?
All SC283WLTRT 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 SC283WLTRT meets industry standards.
7.What is the process for return or replacement of SC283WLTRT?
All SC283WLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC283WLTRT, 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 SC283WLTRT part is unused and in its original packaging.
Return procedure for SC283WLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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