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Semtech Corporation SC441ATETRT
- Part No.:
- SC441ATETRT
- Manufacturer:
- Semtech Corporation
- Category:
- LED Drivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
SC441ATETRT.pdf
- Description:
- IC LED DRVR RGLTR PWM 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,672
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Product details
Overview
SC441ATETRT 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 - enabling robust USB Type-C PD bus protection in industrial and portable systems.
For engineers reviewing the SC441ATETRT datasheet, pinout, applications, or equivalent options, this device offers constant-clamp performance critical for protecting voltage-sensitive PD controllers, load switches, and IoT interfaces where conventional TVS diodes exhibit rising clamping voltage with surge current or temperature.
Technical Context
The SC441ATETRT uses a precision-triggered surge-rated FET as its primary protection element, activated by an internal reference circuit when transient voltage exceeds breakdown. Unlike standard TVS diodes, its clamping voltage remains nearly flat due to decreasing RDS(on) under surge, not fixed dynamic resistance.
It operates over –40°C to +125°C with <20mΩ dynamic resistance (8/20μs), 175pF junction capacitance at 22V, and reverse leakage ≤600nA. The device protects one bidirectional line via six-terminal DFN layout - three IN pins (4–6) and three GND pins (1–3) - requiring all terminals to be connected for full 40A rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures downstream ICs like 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 Level 4 ESD immunity for handheld and connector-exposed applications. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for USB PD VBUS protection without signal integrity impact on DC/low-frequency power lines. |
| Dynamic Resistance | 20mΩ (8/20μs, 1–40A range) - enables near-constant clamping by minimizing I×R voltage rise across surge current range. |
Pinout & Package
SC441ATETRT is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals must be connected: three ground pins for low-inductance return path, three input pins for parallel surge conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection points - all three must be tied to PCB ground plane with multiple vias to minimize inductance and maximize 40A surge current handling. |
| 4, 5, 6 | IN | Protected line input terminals - connected in parallel to VBUS or I/O line; all three required to distribute surge current and maintain specified clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and –40°C to +125°C - eliminates derating uncertainty vs. TVS diodes. |
| Surge-rated FET protection element | Replaces pn-junction avalanche with low-RDS(on) shunt switch - dissipates energy in channel, not junction, improving thermal stability. |
| Low dynamic resistance | 20mΩ enables minimal voltage rise under surge - critical for protecting 22V-rated ICs with tight overvoltage margins. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - sustains operation during repetitive fast transients in industrial control environments. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles exposed to ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at connector, clamping transients before they reach PD controller or power multiplexer. Use Value: Maintains 28V clamping at full 40A surge and 125°C ambient - prevents false OVP trips and ensures PD controller survival where TVS devices exceed safe voltage limits. |
Use Scenario: Safeguarding input 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 shunt that limits voltage across load switch FET drain-source during surge events. Use Value: Keeps clamping voltage below 30V - well under typical 35–40V absolute max ratings of industrial load switches - preventing gate oxide damage or latch-up. |
| IoT Device Power Rail Protection | Notebook/Tablet DC Power Input Protection |
Use Scenario: Securing 22V-capable battery charging or adapter input rails in compact, thermally constrained IoT edge nodes. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on main power entry point. Use Value: 1.6mm × 1.6mm footprint saves >60% board area vs. discrete TVS + capacitor solutions - critical for space-constrained modules. |
Use Scenario: Protecting 20V DC input stages in ultrabooks and tablets against accidental AC adapter surges and connector ESD. IC Role / Device Role / Timing Role: High-energy clamping device placed between barrel jack/USB-C port and system PMIC input. Use Value: Stable 28V clamping across temperature avoids brownouts during high-ambient operation - unlike TVS diodes whose clamping rises above 35V at 125°C. |
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 | Same die, identical electrical specs, identical DFN-6 package; differs only in tape-and-reel packaging (3,000 pcs/reel vs. SC441ATETRT's unspecified quantity). | No functional difference - direct form-fit-function match for production use. | Select TDS2211P.C if standard Semtech reel quantity (3k) aligns with procurement planning. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 30V clamping, smaller 0.6mm × 0.3mm DFN-2 package - optimized for CC/SBU lines, not power rails. | Intended for low-capacitance, low-current signal-line protection - unsuitable for 40A VBUS protection. | Use uClamp2411ZA only for auxiliary USB-C lines; SC441ATETRT remains required for main power rail protection. |
Compared with TDS2211P.C, SC441ATETRT shares identical protection performance and package but may differ in reel configuration; compared with uClamp2411ZA, SC441ATETRT provides 67% higher surge current rating and 2V lower clamping - making it the sole suitable option for 22V power rail EOS suppression.
Availability
SC441ATETRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.
Supply support for SC441ATETRT 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, signal integrity, and power management.
The SC441ATETRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-voltage, high-surge applications where stable clamping across temperature and current is mandatory.
FAQ
What is the exact package type and dimensions of SC441ATETRT?
SC441ATETRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern requires full copper connection to ground plane via multiple vias - no thermal pad solder mask opening is needed, as energy dissipation occurs in the FET channel, not the junction.
Does SC441ATETRT meet IEC 61000-4-5 Level 4 surge immunity?
Yes, SC441ATETRT is rated for 40A peak pulse current (8/20μs waveform), which satisfies IEC 61000-4-5 Level 4 (±1kV, RS=42Ω, CS=0.5μF) for 22V systems. Its 27.5–28V clamping voltage ensures protected circuits remain within safe operating limits even under worst-case surge conditions.
How does SC441ATETRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes - whose clamping voltage rises linearly with surge current (VC = VBR + IPP × RDYN) - SC441ATETRT uses a triggered FET with decreasing RDS(on), resulting in flat 27.5–28V clamping from 24A to 40A and across –40°C to +125°C. This eliminates thermal derating uncertainty in high-ambient designs.
Can SC441ATETRT protect USB Type-C CC and SBU lines?
No - SC441ATETRT is designed for 22V power rail protection and is not suitable for CC/SBU lines. Those require low-capacitance devices like uClamp2411ZA (0.5pF, 24V) to avoid signal distortion. SC441ATETRT's 175pF capacitance and 6-pin DFN layout are optimized for high-current, low-speed power paths, not high-speed or low-capacitance signal lines.
What is the maximum operating temperature range for SC441ATETRT?
SC441ATETRT is fully specified from –40°C to +125°C ambient temperature. Its clamping voltage remains stable across this range - verified down to 27.6V at 40A and 125°C - unlike TVS diodes whose clamping typically increases by 10–15V over the same interval. Junction temperature can reach +150°C under surge, per absolute maximum ratings.
SC441ATETRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 21V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 150mA
- Frequency:
- 700kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
SC441ATETRT FAQ
1.How can I place an order for SC441ATETRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC441ATETRT 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 SC441ATETRT reliable?
The price and inventory of SC441ATETRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC441ATETRT is usually 5 days.
3.What payment methods are accepted for SC441ATETRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC441ATETRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC441ATETRT?
SC441ATETRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC441ATETRT 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 SC441ATETRT?
For technical support, including SC441ATETRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC441ATETRT requirements.
6.How does Aetrix verify that SC441ATETRT is sourced from the original manufacturer or authorized distributors?
All SC441ATETRT 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 SC441ATETRT meets industry standards.
7.What is the process for return or replacement of SC441ATETRT?
All SC441ATETRT units undergo pre-shipment inspection (PSI). If there is an issue with SC441ATETRT, 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 SC441ATETRT part is unused and in its original packaging.
Return procedure for SC441ATETRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC441ATETRT 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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