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Semtech Corporation SC4530WLTRT
- Part No.:
- SC4530WLTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
SC4530WLTRT.pdf
- Description:
- IC REG BUCK ADJ 300MA 8MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:22,660
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Product details
Overview
SC4530WLTRT 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 full current and temperature range (−40°C to +125°C). It protects USB PD and Type-C VBUS lines in compact industrial and portable electronics.
For engineers reviewing the SC4530WLTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under surge, low dynamic resistance (<20 mΩ), junction capacitance (175 pF at 22V), and DFN 1.6×1.6mm 6-lead package compatibility with high-density PCB layouts.
Technical Context
The SC4530WLTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under increasing surge current - not governed by fixed RDYN × IPP.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and exhibits <600 nA leakage at VRWM. Its functional architecture enables stable 27.6–28V clamping at 40A (1.2/50μs + 8/20μs combo waveform, RS = 2Ω), independent of ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards. |
| Dynamic Resistance | 20 mΩ - enables low-voltage drop during high-current transients, minimizing energy dissipation in the device. |
| Junction Capacitance | 175 pF at 22V, 1MHz - compatible with 22V power rail protection where signal integrity is secondary to surge handling. |
| Operating Temperature | −40°C to +125°C - supports deployment in extended-temperature industrial and automotive under-hood environments. |
Pinout & Package
SC4530WLTRT is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with 6 leads and UL 94V-0 molding compound. The package features three dedicated ground terminals and three parallel input terminals for low-inductance, high-current surge path routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to minimize parasitic inductance and maximize 40A capability. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS); equal current sharing ensures thermal balance and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates design margin inflation needed with conventional TVS diodes. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction - reduces thermal stress and improves longevity. |
| Temperature-stable clamping | Clamping remains ~27.6V from −40°C to +125°C - enables reliable protection without derating in hot environments. |
| Low dynamic resistance | 20 mΩ - limits voltage overshoot during fast-rising transients and minimizes power dissipation (P = I²R). |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive burst noise in motor drives and PLCs. |
Applications
| USB Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V VBUS lines in USB Type-C ports supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and PD controller or load switch input. Use Value: Maintains 27.6V clamping at 40A and 125°C - prevents overvoltage damage to PD controllers that tolerate ≤30V absolute max. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges in remote meters or robotics. IC Role / Device Role / Timing Role: Front-end transient shunt protecting internal FET gate oxide and overvoltage latch circuits. Use Value: Limits clamping to 28V across full temperature range - avoids exceeding 30V damage threshold of integrated e-fuse control logic. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet VBUS Line Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-powered IoT gateways subjected to ESD during field servicing or connector mating. IC Role / Device Role / Timing Role: Single-device solution for high-energy EOS on always-on power inputs with minimal board area. Use Value: Delivers ±30kV contact ESD immunity in 1.6×1.6mm footprint - replaces larger multi-diode arrays while improving reliability. |
Use Scenario: Protecting main VBUS supply in ultraportable notebooks and tablets where space and thermal constraints limit TVS options. IC Role / Device Role / Timing Role: Compact, low-profile clamp positioned adjacent to USB-C receptacle to minimize trace inductance. Use Value: 175 pF capacitance and 0.55mm height enable integration into tight layout zones without compromising surge rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, same DFN 1.6×1.6mm package, identical marking code T22 - confirmed direct replacement per Semtech documentation. | No functional or layout change required; validated for USB PD, load switch, and industrial VBUS use cases. | Select SC4530WLTRT when sourcing from Aetrix Electronics' certified inventory with full traceability and lifecycle support. |
| SMAJ22A | Standard unidirectional TVS diode; clamping rises to ~38V at 40A and increases with temperature; 600W peak power vs. SC4530WLTRT's 1120W. | Limited to lower-energy applications; requires larger derating margin for 125°C operation and fails to meet strict USB PD clamping targets. | Consider only if cost sensitivity outweighs clamping stability and temperature performance requirements. |
Compared with SMAJ22A, SC4530WLTRT delivers 35% lower clamping voltage at full surge current and zero temperature drift - enabling smaller safety margins and higher system reliability in thermally demanding deployments; TDS2211P is electrically and mechanically identical but differs only in reel packaging and traceability chain.
Availability
SC4530WLTRT is available at Aetrix Electronics and suitable for USB Power Delivery systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle assurance, and full compliance documentation.
Supply support for SC4530WLTRT 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.
The SC4530WLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping and temperature insensitivity are critical.
FAQ
What is the clamping voltage of SC4530WLTRT at 40A surge current?
The SC4530WLTRT clamps at 27.6–28V under 40A peak pulse current (1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), as specified in its electrical characteristics table. This value remains stable across −40°C to +125°C, distinguishing it from conventional TVS diodes whose clamping rises with current and temperature. SC4530WLTRT achieves this via its FET-based shunt architecture and low dynamic resistance.
Is SC4530WLTRT pin-compatible with TDS2211P?
Yes, SC4530WLTRT is pin-compatible with TDS2211P: both use the identical DFN 1.6×1.6mm 6-lead package with pins 1–3 as GND and pins 4–6 as IN. Semtech's datasheet confirms matching pin configuration, thermal profile, and electrical behavior. SC4530WLTRT is a valid alternate marking for the same die and construction, differing only in tape-and-reel packaging and traceability documentation.
Can SC4530WLTRT protect USB Type-C VBUS lines operating at 20V?
Yes, SC4530WLTRT is explicitly designed for 22V working voltage and is recommended by Semtech for USB Type-C VBUS protection in PD-enabled systems. Its 22V reverse stand-off voltage safely accommodates 20V nominal PD operation, while its 27.6V clamping at 40A ensures downstream PD controllers (typically rated ≤30V) remain within safe operating limits - even at 125°C ambient.
What is the junction capacitance of SC4530WLTRT and how does it affect circuit design?
The SC4530WLTRT exhibits 175 pF junction capacitance at 22V and 1MHz, measured across IN-to-GND. This value is appropriate for 22V power rail protection but unsuitable for high-speed data lines (e.g., USB SS, PCIe). In VBUS applications, it introduces negligible impedance at DC/low frequencies but must be accounted for in high-frequency noise filtering - no additional decoupling degradation occurs due to its low ESR and stable C-V curve.
Does SC4530WLTRT meet IEC 61000-4-5 surge immunity standards?
Yes, SC4530WLTRT is rated for 40A peak pulse current (tp = 8/20μs), satisfying IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) for unsymmetrical lines. Its low dynamic resistance and constant-clamp behavior ensure consistent performance across repeated surges and elevated temperatures - a key requirement for industrial equipment certification where standard TVS devices often fail margin testing.
SC4530WLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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):
- 3V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 1.232V
- Voltage - Output (Max):
- 28.8V
- Current - Output:
- 300mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLPD-W (3x2)
SC4530WLTRT FAQ
1.How can I place an order for SC4530WLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4530WLTRT 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 SC4530WLTRT reliable?
The price and inventory of SC4530WLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4530WLTRT is usually 5 days.
3.What payment methods are accepted for SC4530WLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4530WLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4530WLTRT?
SC4530WLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4530WLTRT 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 SC4530WLTRT?
For technical support, including SC4530WLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4530WLTRT requirements.
6.How does Aetrix verify that SC4530WLTRT is sourced from the original manufacturer or authorized distributors?
All SC4530WLTRT 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 SC4530WLTRT meets industry standards.
7.What is the process for return or replacement of SC4530WLTRT?
All SC4530WLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4530WLTRT, 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 SC4530WLTRT part is unused and in its original packaging.
Return procedure for SC4530WLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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