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Semtech Corporation SC431LISK.25TRT
- Part No.:
- SC431LISK.25TRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SC431LISK.25TRT.pdf
- Description:
- IC VREF SHUNT ADJ 0.25% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,724
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Product details
Overview
SC431LISK.25TRT 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), constant 27.5–28V clamping across 24–40A, 20mΩ dynamic resistance, and 175pF junction capacitance - enabling robust USB Type-C PD bus protection in industrial and mobile systems.
For engineers reviewing the SC431LISK.25TRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability over temperature and current, low dynamic resistance for minimal voltage overshoot, DFN-6 package layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards.
Technical Context
The SC431LISK.25TRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) across 24–40A and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V at 1mA, and reverse leakage ≤600nA at 22V. Its functional architecture enables reliable protection of load switches and USB PD controllers where voltage margin is constrained.
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 + 1.2/50μs combo wave) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 ±1kV surge testing on 42Ω source impedance networks. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - eliminates need for secondary ESD stages in high-reliability USB Type-C and IoT interfaces. |
| Dynamic Resistance | 20mΩ - minimizes voltage rise (ΔV = I × R) during fast transients, critical for protecting low-voltage-tolerance FET gates in load switches. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with 20V USB PD bus routing without signal integrity degradation. |
Pinout & Package
SC431LISK.25TRT 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; thermal performance relies on PCB copper area and multiple vias to ground plane - no thermal pad required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize 40A capability and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB PD); parallel connection of all three pins ensures uniform current sharing and optimal clamping response. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across full 24–40A surge range and −40°C to +125°C - eliminates derating uncertainty in industrial thermal environments. |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during fast-rising transients, protecting sensitive gate oxides in e-fuses and load switches. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - sustains operation in electrically noisy factory automation and metering equipment. |
| DFN-6 footprint | 1.6mm × 1.6mm - saves >60% board area vs. SO-8 or SOT-23 TVS alternatives while maintaining 1120W peak power handling. |
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 connector hot-plug ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed immediately at connector entry point to shunt surge energy to ground before reaching PD controller or power multiplexer. Use Value: Maintains clamping at 27.5–28V across temperature and current - avoids overvoltage damage to 30V-rated PD controllers even at 125°C ambient. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics control modules. IC Role / Device Role / Timing Role: Primary front-end surge clamp that limits transient voltage seen by internal FET gate oxide and overvoltage protection circuitry. Use Value: 20mΩ dynamic resistance prevents voltage overshoot beyond 30V rating during 40A 8/20μs events - extends switch lifetime and avoids false OVP trips. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet Main Power Input Protection |
Use Scenario: Securing 22V-capable power inputs in battery-powered IoT gateways exposed to ESD during field servicing or docking. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV designs to meet IEC 61000-4-2/4-5 in space-constrained edge enclosures. Use Value: ±30kV ESD rating and 175pF capacitance enable direct integration without signal filtering - preserves power-up timing integrity. |
Use Scenario: Hardening 20V DC-in ports on ultrabooks and tablets against accidental AC adapter misconnection or surge coupling from shared power bricks. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates within nanoseconds to clamp transients before they propagate to PMIC input rails. Use Value: Stable 28V clamping at 125°C allows reliable operation in thermally dense chassis - avoids brownout or latch-up in system power management ICs. |
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 and DFN-6 package; differs only in tape-and-reel packaging (3,000 pcs/reel vs. SC431LISK.25TRT's unspecified reel quantity). | No functional difference; same pinout, thermal profile, and layout requirements. | Select TDS2211P.C for volume procurement where standard Semtech reel size is preferred. |
| uClamp2411ZA | 24V working voltage, lower 22V clamping (typ. 22V @ 5A), higher 300pF capacitance, SOD-323 package. | Better suited for CC/SBU lines in USB-C; insufficient for 22V VBUS due to lower IPP (5A) and higher capacitance. | Not a direct alternative for SC431LISK.25TRT's 22V bus protection role - use only for auxiliary signal-line protection. |
Compared with TDS2211P.C, SC431LISK.25TRT offers identical protection performance but may differ in traceability or date-code marking format; compared with uClamp2411ZA, SC431LISK.25TRT provides 8× higher surge current rating and 40% lower capacitance - making it the sole suitable choice for 22V power rail hardening.
Availability
SC431LISK.25TRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, IoT edge node power rails, and notebook DC-in protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SC431LISK.25TRT 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, protection, and signal integrity.
The SC431LISK.25TRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where clamping stability and low dynamic resistance are critical.
FAQ
What is the maximum continuous operating voltage for SC431LISK.25TRT?
The SC431LISK.25TRT 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 SC431LISK.25TRT suitable for 20V USB PD bus and industrial 22V power rail applications where sustained voltage margin is required.
How does SC431LISK.25TRT achieve constant clamping voltage across varying surge currents?
SC431LISK.25TRT uses a surge-rated FET activated by a precision trigger circuit. As peak pulse current increases, the FET's RDS(on) decreases, counteracting voltage rise - resulting in stable 27.5–28V clamping from 24A to 40A. This behavior is confirmed in the SC431LISK.25TRT datasheet's clamping vs. current curves.
Is SC431LISK.25TRT pin-compatible with other Semtech TDS devices like TDS2211P?
Yes - SC431LISK.25TRT shares the identical DFN-6 package, pin configuration (pins 1–3 = GND, pins 4–6 = IN), and mechanical dimensions with TDS2211P. Layouts designed for TDS2211P require no modification to accommodate SC431LISK.25TRT.
What is the junction capacitance of SC431LISK.25TRT and why does it matter?
The SC431LISK.25TRT exhibits 175pF junction capacitance at 22V and 1MHz. This value is low enough to avoid signal distortion on 20V USB PD buses yet high enough to ensure effective high-frequency ESD dissipation - a balance critical for SC431LISK.25TRT's dual-role protection of both power and high-speed interface lines.
Does SC431LISK.25TRT require a thermal pad or special PCB copper area?
No - SC431LISK.25TRT dissipates surge energy in its silicon FET structure, not via junction heating. The datasheet specifies no thermal pad; instead, it recommends connecting all GND pins (1–3) with multiple vias to an internal ground plane to minimize inductance. This design simplifies layout and reduces cost versus thermally enhanced packages.
SC431LISK.25TRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 16 V
- Current - Output:
- 100 µA
- Tolerance:
- ±0.25%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SC431LISK.25TRT FAQ
1.How can I place an order for SC431LISK.25TRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC431LISK.25TRT 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 SC431LISK.25TRT reliable?
The price and inventory of SC431LISK.25TRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC431LISK.25TRT is usually 5 days.
3.What payment methods are accepted for SC431LISK.25TRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC431LISK.25TRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC431LISK.25TRT?
SC431LISK.25TRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC431LISK.25TRT 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 SC431LISK.25TRT?
For technical support, including SC431LISK.25TRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC431LISK.25TRT requirements.
6.How does Aetrix verify that SC431LISK.25TRT is sourced from the original manufacturer or authorized distributors?
All SC431LISK.25TRT 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 SC431LISK.25TRT meets industry standards.
7.What is the process for return or replacement of SC431LISK.25TRT?
All SC431LISK.25TRT units undergo pre-shipment inspection (PSI). If there is an issue with SC431LISK.25TRT, 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 SC431LISK.25TRT part is unused and in its original packaging.
Return procedure for SC431LISK.25TRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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