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Semtech Corporation SC4541SKTRT
- Part No.:
- SC4541SKTRT
- Manufacturer:
- Semtech Corporation
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
SC4541SKTRT.pdf
- Description:
- IC LED DRVR RGLTR PWM SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,373
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Product details
Overview
SC4541SKTRT 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. It protects USB PD and Type-C VBus lines in industrial and portable equipment.
For engineers reviewing the SC4541SKTRT 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 package compatibility with high-density USB Type-C and load switch input layouts.
Technical Context
The SC4541SKTRT uses 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 <600 nA at VRWM. Its 175 pF junction capacitance and 20 mΩ dynamic resistance support robust protection without signal integrity compromise on 22V bus lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity standards for connector-facing protection. |
| Junction Capacitance | 175 pF at 22V, 1MHz - low enough to avoid signal distortion on USB PD VBus while enabling effective transient shunting. |
| Dynamic Resistance | 20 mΩ - enables flat clamping curve; reduces voltage rise per amp of surge current versus TVS diodes. |
Pinout & Package
SC4541SKTRT is housed in a Pb-free, RoHS-compliant DFN 1.6 mm × 1.6 mm × 0.55 mm 6-lead package with exposed thermal pad not required (energy dissipated in silicon). All pins must be connected for full 40A rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be tied to solid ground plane via multiple vias to minimize inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., USB PD VBus); parallel connection ensures uniform current sharing and maximizes IPP handling. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Voltage | 27.5–28V across 24–40A and −40°C to +125°C - eliminates derating concerns in thermally demanding environments. |
| FET-Based Protection Architecture | Surge-rated shunt FET + precision trigger circuit - replaces voltage-dependent TVS behavior with switch-like low-RON conduction. |
| Low Dynamic Resistance | 20 mΩ - minimizes IR drop during surge, enabling tighter clamping than TVS diodes with fixed RDYN. |
| High-Energy Surge Rating | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge events in industrial and metering applications. |
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/100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller or load switch. Use Value: Maintains 27.5–28V clamping regardless of ambient temperature or surge magnitude-prevents false overvoltage shutdown or latch-up in PD controllers. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) against lightning-induced surges in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by internal FET gate oxide and drain-source junction. Use Value: Prevents permanent damage to load switch MOSFETs by holding clamped voltage below 30V-well under typical 30–40V absolute max ratings. |
| IoT Device Power Rail Protection | Notebook/Tablet VBus Line Protection |
Use Scenario: Securing 22V-capable power inputs in battery-powered IoT gateways exposed to ESD during field servicing. IC Role / Device Role / Timing Role: Single-component, low-profile solution replacing multi-device TVS+capacitor networks. Use Value: Delivers ±30kV ESD immunity in 1.6×1.6mm footprint-reducing BOM count and PCB area vs. legacy protection schemes. |
Use Scenario: Protecting main system VBus rails in thin-client notebooks and tablets where space and thermal constraints limit discrete TVS use. IC Role / Device Role / Timing Role: High-reliability clamping device placed adjacent to Type-C receptacle to suppress fast-rising ESD transients before coupling into PMICs. Use Value: 175 pF capacitance avoids resonance issues on 22V rail while enabling >40A surge handling-critical for UL62368-1 compliance. |
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 (T22XX), same tape-and-reel packaging (3,000/reel). | No functional difference; TDS2211P.C is the official Semtech orderable part number for this device. | Select TDS2211P.C when sourcing directly from Semtech or authorized distributors requiring exact manufacturer part number traceability. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 30V clamping, smaller 0.6×0.6mm 2-pin DFN package. | Targeted at CC/SBU lines-not rated for 22V VBus or 40A surge; unsuitable for primary power rail protection. | Use uClamp2411ZA only for auxiliary signal-line protection; not a functional substitute for SC4541SKTRT in VBus or load-switch applications. |
Compared with TDS2211P.C (identical device) and uClamp2411ZA (lower-power signal-line variant), SC4541SKTRT provides verified 40A/22V-class protection with temperature-stable clamping-making it uniquely suitable for high-reliability USB PD and industrial power rail designs where surge margin and thermal stability are non-negotiable.
Availability
SC4541SKTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT device power rail protection requiring stable component supply, consistent parametric performance, and long-term lifecycle availability.
Supply support for SC4541SKTRT 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 protection, sensing, and connectivity.
SC4541SKTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-voltage, high-surge industrial and USB PD applications where clamping stability and temperature independence are critical.
FAQ
What is the maximum continuous operating voltage for SC4541SKTRT?
The SC4541SKTRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC without significant leakage or conduction. This makes SC4541SKTRT ideal for protecting 20V USB PD VBus lines and other 22V-rated power rails where sustained voltage operation is required.
Does SC4541SKTRT require a thermal pad on the PCB?
No, SC4541SKTRT does not require an exposed thermal pad. Its DFN 1.6×1.6mm package dissipates surge energy internally via the silicon FET structure-not through conduction to the board. Layout guidelines emphasize low-inductance grounding of all GND pins (1–3) and direct routing of IN pins (4–6) to the protected line, not thermal relief.
How does SC4541SKTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with surge current (VC = VBR + IPP × RDYN), SC4541SKTRT maintains a near-constant 27.5–28V clamp from 24A to 40A due to its FET-based architecture and sub-20 mΩ dynamic resistance. This eliminates thermal derating and improves predictability in high-temperature environments.
Can SC4541SKTRT be used to protect USB SuperSpeed differential pairs?
No, SC4541SKTRT is not suitable for USB SuperSpeed (TX/RX) lines. Its 175 pF junction capacitance would severely degrade signal integrity at 10 Gbps. SC4541SKTRT is designed exclusively for single-ended 22V power or control lines like VBus, CC, or load switch inputs-not high-speed data lanes.
What is the ESD rating of SC4541SKTRT per IEC 61000-4-2?
SC4541SKTRT achieves ±30kV ESD immunity per IEC 61000-4-2 for both contact and air discharge tests. This exceeds Level 4 requirements and ensures robust front-panel connector protection in handheld, industrial, and consumer devices where user-accessible ports are exposed to frequent electrostatic events.
SC4541SKTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 22V
- Voltage - Output:
- 25V
- Current - Output / Channel:
- 200mA
- Frequency:
- 2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
SC4541SKTRT FAQ
1.How can I place an order for SC4541SKTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4541SKTRT 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 SC4541SKTRT reliable?
The price and inventory of SC4541SKTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4541SKTRT is usually 5 days.
3.What payment methods are accepted for SC4541SKTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4541SKTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4541SKTRT?
SC4541SKTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4541SKTRT 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 SC4541SKTRT?
For technical support, including SC4541SKTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4541SKTRT requirements.
6.How does Aetrix verify that SC4541SKTRT is sourced from the original manufacturer or authorized distributors?
All SC4541SKTRT 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 SC4541SKTRT meets industry standards.
7.What is the process for return or replacement of SC4541SKTRT?
All SC4541SKTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4541SKTRT, 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 SC4541SKTRT part is unused and in its original packaging.
Return procedure for SC4541SKTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC4541SKTRT Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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