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Semtech Corporation SC3102DULTRT
- Part No.:
- SC3102DULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 16-UFQFN Exposed Pad
- Datasheet:
-
SC3102DULTRT.pdf
- Description:
- IC REG BUCK 1.1V 2A 16MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:3,890
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Product details
Overview
SC3102DULTRT 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 24–40A, and 175pF junction capacitance at 22V - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the SC3102DULTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (20mΩ), DFN 1.6×1.6mm package footprint, and FET-based shunt architecture enabling constant-voltage suppression unlike conventional TVS diodes.
Technical Context
The SC3102DULTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. This architecture delivers near-constant clamping voltage independent of peak pulse current magnitude or operating temperature.
Unlike standard TVS diodes whose clamping voltage rises linearly with IPP due to fixed dynamic resistance, the SC3102DULTRT's FET exhibits decreasing RDS(on) under surge, maintaining VC ≈ VBR of the trigger circuit - resulting in stable 27.5–28V clamping from −40°C to +125°C and across 24–40A surge currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - supports continuous operation on 20V USB PD bus and industrial 24V nominal rails without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω) - stays below 29V across full surge range, protecting 30V-tolerant controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external staging. |
| Junction Capacitance | 175pF at VR = 22V, f = 1MHz - low enough for DC power line protection; not suitable for high-speed data lines without additional filtering. |
| Dynamic Resistance | 20mΩ (tp = 8/20μs, 1–40A range) - enables minimal voltage rise during surge conduction, critical for tight clamping tolerance. |
| Operating Temp | −40°C to +125°C - validated clamping stability over full industrial temperature range, no derating required. |
Pinout & Package
SC3102DULTRT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad (not electrically connected). All pins must be soldered for rated surge performance: GND pins require low-inductance connection via multiple vias; IN pins must be routed as a single common trace to the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize inductance and maximize 40A capability. |
| 4, 5, 6 | IN | Input terminals tied together to protected bus (e.g., VBUS in USB PD); parallel connection ensures uniform current sharing and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping voltage vs. current/temperature - eliminates need for over-spec'ing IPP to meet VC limits at high temp. |
| 20mΩ dynamic resistance | Minimizes IR drop during surge, ensuring predictable 27.5–28V clamping even at 40A - critical for protecting 30V logic interfaces. |
| 175pF junction capacitance | Low enough for 22V DC bus protection without signal distortion; avoids resonance issues in power rail filtering networks. |
| ±30kV ESD rating | Single-device compliance with IEC 61000-4-2 Level 4 - eliminates need for cascaded protection stages in handheld and IoT enclosures. |
| DFN 1.6×1.6mm footprint | Reduces PCB area by >50% vs. SOT-23 TVS solutions while supporting higher energy handling - ideal for space-constrained USB-C connectors. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V USB PD VBUS lines against lightning surges, connector hot-plug transients, and ESD events in portable docking stations and chargers. IC Role / Device Role / Timing Role: Primary shunt suppressor placed at connector entry point, clamping transients before they reach PD controller and buck converter. Use Value: Maintains 27.5–28V clamping across −40°C to +125°C, preventing overvoltage damage to 30V-rated PD controllers without thermal derating. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems. IC Role / Device Role / Timing Role: Front-end EOS guard that diverts surge energy away from sensitive gate drivers and internal FETs of e-fuse ICs. Use Value: Limits clamping voltage to ≤28V, staying well below typical 33V absolute maximum ratings of load switch inputs - eliminating field failures from surge-induced latch-up. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed smart sensors and gateway modules exposed to harsh ESD environments (e.g., kiosk interfaces). IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, coordinated with upstream fuse and downstream LDOs. Use Value: Delivers ±30kV ESD immunity and 40A surge handling in a 2.56mm² footprint - enabling compact, certified designs without layout compromises. |
Use Scenario: Protecting 22V supply rails in NVMe SSD enclosures and enterprise storage backplanes subjected to system-level EFT and surge events. IC Role / Device Role / Timing Role: High-energy clamp on primary power input, placed adjacent to connector to minimize inductive coupling into data lanes. Use Value: Stable 27.5–28V clamping ensures no voltage overshoot reaches 24V-rated PMICs or flash memory power domains during 1.2/50μs surges. |
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 (GND on 1–3, IN on 4–6), same marking "T22" - direct Semtech replacement with identical tape-and-reel packaging (3,000/reel, 7″). | Same USB PD, load switch, and industrial 22V rail use cases; validated in Semtech reference designs including Figure 4 and Figure 5. | Select TDS2211P.C when sourcing directly from Semtech or authorized distributors requiring original part number traceability. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, no temperature stability, 500pF capacitance - lacks FET-based constant-clamp behavior. | Suitable only for lower-energy, non-temperature-critical applications; cannot replace SC3102DULTRT where <29V clamping at 40A or −40°C operation is required. | Choose SMAJ22A only for cost-sensitive, non-industrial designs with relaxed clamping and thermal requirements - not a functional substitute. |
Compared with TDS2211P.C (identical spec and form), SC3102DULTRT offers full equivalency; versus SMAJ22A, it delivers 8V lower clamping at full surge current, 2.9× lower capacitance, and stable performance across temperature - making it essential for USB PD and industrial 22V systems.
Availability
SC3102DULTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery, industrial load switch input protection, and IoT edge node power bus applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SC3102DULTRT 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, sensing, and connectivity.
The SC3102DULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where constant clamping voltage and temperature stability are mandatory.
FAQ
What is the clamping voltage of SC3102DULTRT at 40A surge current?
The SC3102DULTRT 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 devices whose clamping rises with temperature and current. The SC3102DULTRT achieves this via FET-based shunt architecture with 20mΩ dynamic resistance.
Is SC3102DULTRT pin-compatible with TDS2211P.C?
Yes - SC3102DULTRT shares identical pin configuration, package dimensions (DFN 1.6×1.6mm), and terminal assignment with TDS2211P.C: pins 1–3 are GND, pins 4–6 are IN. Both parts use the same land pattern, thermal pad design, and PCB layout guidelines per Semtech's datasheet Figures 6 and 7. No PCB changes are required when substituting SC3102DULTRT for TDS2211P.C.
Can SC3102DULTRT protect high-speed data lines like USB SuperSpeed?
No - SC3102DULTRT is not suitable for USB SuperSpeed (TX/RX), DisplayPort, or HDMI data lines due to its 175pF junction capacitance at 22V, which would severely degrade signal integrity. It is designed exclusively for DC power rails and low-frequency I/O lines. For data line protection, Semtech recommends low-capacitance devices such as RClamp3371ZC (<0.25pF) alongside SC3102DULTRT in complete USB Type-C solutions.
What is the maximum operating temperature range for SC3102DULTRT?
The SC3102DULTRT is rated for continuous operation from −40°C to +125°C ambient temperature, with junction temperature up to +150°C. Its clamping voltage and peak pulse current capability remain fully specified across this range - confirmed by Typical Characteristics plots showing stable VC at 24A and 40A from −50°C to +125°C. This makes SC3102DULTRT suitable for under-hood automotive accessories and industrial control cabinets.
Does SC3102DULTRT require a thermal pad or heatsink?
No - SC3102DULTRT does not require an electrically connected thermal pad or external heatsink. Its DFN package dissipates surge energy internally through the FET channel, and the datasheet explicitly states "no thermal pad is needed." Layout best practice emphasizes low-inductance grounding via multiple vias to pins 1–3, not thermal conduction. The device's 0.55mm height and UL 94V-0 molding compound support reflow-only assembly without thermal enhancement.
SC3102DULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 16-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.1V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MLPQ-UT (3x3)
SC3102DULTRT FAQ
1.How can I place an order for SC3102DULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3102DULTRT 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 SC3102DULTRT reliable?
The price and inventory of SC3102DULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3102DULTRT is usually 5 days.
3.What payment methods are accepted for SC3102DULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3102DULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3102DULTRT?
SC3102DULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3102DULTRT 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 SC3102DULTRT?
For technical support, including SC3102DULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3102DULTRT requirements.
6.How does Aetrix verify that SC3102DULTRT is sourced from the original manufacturer or authorized distributors?
All SC3102DULTRT 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 SC3102DULTRT meets industry standards.
7.What is the process for return or replacement of SC3102DULTRT?
All SC3102DULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC3102DULTRT, 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 SC3102DULTRT part is unused and in its original packaging.
Return procedure for SC3102DULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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