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Semtech Corporation SC630AULTRT
- Part No.:
- SC630AULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
SC630AULTRT.pdf
- Description:
- IC REG CHG PUMP 3.3V 300MA 8MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SC630AULTRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC630AULTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability designs.
Technical Context
The SC630AULTRT 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 across 24–40A peak pulse current due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping at 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), 22V reverse stand-off voltage, and 175pF junction capacitance at 22V/1MHz - enabling robust protection without signal integrity compromise in high-speed power interfaces.
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) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| 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 Class 4 ESD immunity for external connectors and user-accessible ports. |
| Dynamic Resistance | 20mΩ - enables low-voltage drop during high-current transients, minimizing power dissipation and thermal stress. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails and low-frequency control lines; not intended for >100MHz signal paths. |
Pinout & Package
SC630AULTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; no thermal pad required - energy is dissipated within the silicon FET structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected with low-inductance vias to maximize 40A capability. |
| 4, 5, 6 | IN | Protected input node - connects directly to VBus or power line; all three pins are internally paralleled for current sharing and reduced trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates design margin inflation needed with conventional TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V from –40°C to +125°C - enables reliable operation in uncontrolled industrial or automotive under-hood environments. |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction - avoids thermal runaway and enables higher single-pulse survivability. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during fast-rising transients (<10ns rise time). |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBus lines in USB-C receptacles against lightning-induced surges and hot-plug ESD events. IC Role / Device Role / Timing Role: Primary shunt protector placed immediately after connector, clamping transients before they reach USB PD controller or e-fuse IC. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to 24V-tolerant PD controllers where standard TVS would exceed 35V at elevated temperature. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient suppressor that limits voltage seen by the load switch's internal FET drain-source junction. Use Value: Keeps clamping voltage below 28V across full temperature and current range - avoids gate oxide stress or avalanche failure in integrated MOSFETs rated for ≤30V ABS MAX. |
| Notebook/Tablet DC Power Rail Protection | Storage Device 22V Backup Power Line Protection |
Use Scenario: Securing 19–22V adapter-input rails in thin-client notebooks and detachable tablets subject to accidental AC mains coupling or ESD. IC Role / Device Role / Timing Role: Standalone EOS suppressor replacing multi-device TVS arrays, reducing BOM count and PCB area. Use Value: 1.6mm × 1.6mm DFN footprint saves >60% board space versus SOD-323 TVS solutions while delivering superior 40A surge handling. |
Use Scenario: Protecting 22V backup battery or supercapacitor charging lines in NVMe SSDs and enterprise storage controllers. IC Role / Device Role / Timing Role: High-reliability transient guard for always-on power domains where failure could cause data corruption or firmware lockup. Use Value: 130–600nA leakage at 22V ensures minimal standby current drain - critical for multi-year battery-backed retention in storage subsystems. |
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-6 package, identical marking code T22; manufactured by Semtech with identical Rev 2.5 datasheet. | No functional difference - used interchangeably in production; differs only in reel packaging (3,000 pcs/reel vs. SC630AULTRT's tape-and-reel configuration). | Select TDS2211P.C when sourcing from Semtech-distributed channels requiring exact part-number compliance per ordering documentation. |
| uClamp2411ZA.TCT | Zener-based TVS with 24V working voltage, 35V clamping at 12A, 0.25pF capacitance - lower surge rating, higher clamping, ultra-low capacitance. | Targeted at CC/SBU lines in USB-C, not VBus; unsuitable for 40A surge protection due to lower IPP and temperature-dependent clamping. | Choose uClamp2411ZA.TCT only for low-capacitance signal-line protection; not a functional replacement for SC630AULTRT's power-rail role. |
Compared with SC630AULTRT, TDS2211P.C offers identical performance and form factor with documented manufacturing equivalence, while uClamp2411ZA.TCT serves a fundamentally different signal-integrity-critical function and cannot handle 22V bus-level surge energy.
Availability
SC630AULTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and notebook DC power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SC630AULTRT 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, power management, and transient protection.
The SC630AULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping voltage across temperature and current is critical.
FAQ
What is the maximum continuous operating voltage for SC630AULTRT?
The SC630AULTRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage. This makes SC630AULTRT suitable for nominal 20V USB PD VBus and 22V industrial power rails where sustained voltage must remain below the device's rated threshold.
Does SC630AULTRT require a thermal pad on the PCB?
No, SC630AULTRT does not require a thermal pad. Its DFN-6 package dissipates surge energy within the silicon FET structure rather than through junction heating like traditional TVS diodes. The datasheet explicitly states "no thermal pad is needed," and layout guidelines emphasize low-inductance GND vias instead of copper pour under the device.
How does SC630AULTRT's clamping voltage compare to standard TVS diodes at high temperature?
At 125°C, SC630AULTRT maintains 27.5–28V clamping at 40A, whereas typical 22V TVS diodes exceed 35V under identical conditions due to positive temperature coefficient of dynamic resistance. This stability is intrinsic to SC630AULTRT's FET-based architecture and is confirmed in Figure 3 of the official datasheet.
Can SC630AULTRT protect high-speed data lines like USB SuperSpeed differential pairs?
No, SC630AULTRT is not intended for high-speed data lines. With 175pF junction capacitance, it is optimized for DC power rails and low-frequency control signals. For USB SS TX/RX lines, Semtech recommends RClamp3371ZC (0.25pF), as specified in the SC630AULTRT application note for complete USB-C protection schemes.
What is the recommended PCB layout for SC630AULTRT to achieve full 40A surge rating?
To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must connect via a single low-inductance trace to the protected line, and all three GND pins (1, 2, 3) must connect with multiple vias to an internal or bottom-layer ground plane. Placement within 2mm of the connector is mandatory to minimize coupled transient energy, per Figure 7 in the SC630AULTRT datasheet.
SC630AULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.95V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLPD-UT (2x2)
SC630AULTRT FAQ
1.How can I place an order for SC630AULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC630AULTRT 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 SC630AULTRT reliable?
The price and inventory of SC630AULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC630AULTRT is usually 5 days.
3.What payment methods are accepted for SC630AULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC630AULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC630AULTRT?
SC630AULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC630AULTRT 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 SC630AULTRT?
For technical support, including SC630AULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC630AULTRT requirements.
6.How does Aetrix verify that SC630AULTRT is sourced from the original manufacturer or authorized distributors?
All SC630AULTRT 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 SC630AULTRT meets industry standards.
7.What is the process for return or replacement of SC630AULTRT?
All SC630AULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC630AULTRT, 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 SC630AULTRT part is unused and in its original packaging.
Return procedure for SC630AULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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