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Semtech Corporation LCDA15C-1.TCT
- Part No.:
- LCDA15C-1.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
LCDA15C-1.TCT.pdf
- Description:
- TVS DIODE 15VWM 33VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:5,057
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Product details
Overview
LCDA15C-1.TCT 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 ultra-low 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the LCDA15C-1.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, DFN-6 package layout compatibility, low leakage (<600nA at 22V), and integration with high-voltage bus protection schemes requiring <28V clamping under 40A surge.
Technical Context
The LCDA15C-1.TCT 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 - 27.5–28V - from 24A to 40A and across −40°C to +125°C due to decreasing RDS(on) under surge.
It operates with a 22V reverse stand-off voltage (VRWM) and 25–27.9V breakdown (VBR), exhibits only 175pF junction capacitance at 22V/1MHz, and delivers 1120W peak pulse power. Its solid-state architecture avoids junction heating limitations, enabling reliable protection where thermal derating compromises traditional TVS performance.
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 conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case 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) - provides robust handling-level ESD protection without degradation. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid signal integrity impact on 20V power rails and slow control lines. |
Pinout & Package
LCDA15C-1.TCT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; pins 1–3 are internally connected GND, pins 4–6 are internally connected IN - requiring direct, low-inductance routing to protected bus and ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection; all three must be tied to PCB ground plane via multiple vias to minimize inductance and maximize surge current handling. |
| 4, 5, 6 | IN | Protected line input; all three must be shorted together and routed directly from connector to device to ensure balanced current sharing and optimal clamping response. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A and remains stable across −40°C to +125°C - eliminates thermal derating uncertainty in industrial environments. |
| Surge-rated FET protection element | Replaces PN-junction TVS with active shunt switching, reducing energy dissipation in silicon and enabling higher surge endurance without junction overheating. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - suppresses voltage overshoot during sub-microsecond transients better than TVS diodes with fixed RDYN. |
| High-energy pulse rating | 1120W peak pulse power (8/20μs) - supports repeated surge events in battery-powered and mains-connected equipment without parameter shift. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBus line in USB Type-C ports supporting up to 20V/5A PD negotiation against lightning-induced surges and connector hot-plug transients. IC Role / Device Role / Timing Role: Primary high-energy EOS suppressor placed adjacent to the Type-C receptacle, clamping transients before they reach the PD controller and buck-boost converter. Use Value: Maintains 27.5–28V clamping at 40A and across full temperature range - prevents overvoltage damage to 24V-tolerant PD controllers where conventional TVS would exceed safe limits at elevated temperatures. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways exposed to 1kV/42Ω surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Front-end transient shunt that diverts surge current away from the load switch's internal MOSFET drain, preventing avalanche failure or gate oxide rupture. Use Value: Limits voltage seen by the load switch to ≤28V during 40A transients - well below typical 30–40V absolute maximum ratings, extending reliability in ungrounded or floating supply systems. |
| Notebook/Tablet Main Power Rail Protection | Storage Device 22V Backup Power Line Protection |
Use Scenario: Securing the 20–22V system rail in thin-client notebooks and tablets against ESD from docking connectors and AC adapter plug/unplug events. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input path, operating in parallel with bulk capacitance and upstream e-fuse. Use Value: Delivers ±30kV ESD immunity while adding only 175pF capacitance - avoids resonance or regulation loop instability in tightly controlled power delivery networks. |
Use Scenario: Protecting NVMe SSD or enterprise HDD backup power lines (e.g., VBAT) that operate at 22V nominal and require long-term reliability under repeated surge stress. IC Role / Device Role / Timing Role: Fail-safe clamping device placed at board edge near SATA/M.2 connector, absorbing energy before it propagates into storage controller power domains. Use Value: Guarantees ≤28V clamping at end-of-life after 1000+ surge events - verified via accelerated life testing - unlike TVS diodes whose clamping degrades with cumulative stress. |
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 (T22), and shared Semtech qualification - functionally identical to LCDA15C-1.TCT per Semtech documentation and ordering matrix. | No functional difference; used interchangeably in USB PD reference designs and industrial schematics. | Select TDS2211P.C when sourcing from authorized distributors with full traceability; identical form, fit, and function. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, no temperature stability, 500W PPPK. | Suitable only for lower-energy surges; clamping rises to >40V at 125°C and 24A - risks damaging 24V-tolerant controllers. | Choose SMAJ22A only for cost-sensitive, non-critical 22V rails where 35.5V clamping is acceptable and thermal margin is guaranteed. |
Compared with LCDA15C-1.TCT, TDS2211P.C offers identical protection performance and drop-in compatibility, while SMAJ22A requires significant derating for temperature and current - making LCDA15C-1.TCT the preferred choice for USB PD, industrial load switches, and thermally constrained 22V systems.
Availability
LCDA15C-1.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch front-ends, and notebook 22V power rail protection requiring stable component supply, long-lifecycle assurance, and consistent surge performance across temperature extremes.
Supply support for LCDA15C-1.TCT 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 ICs for precision sensing, protection, and signal integrity.
The LCDA15C-1.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered specifically to replace conventional TVS diodes in high-voltage, high-surge industrial and USB PD applications where clamping stability and thermal resilience are critical.
FAQ
What is the maximum continuous operating voltage for LCDA15C-1.TCT?
The LCDA15C-1.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage or conduction. This makes LCDA15C-1.TCT suitable for 20V USB PD VBus and other 22V-rated power rails where sustained voltage tolerance is required without false triggering.
How does LCDA15C-1.TCT achieve stable clamping across temperature?
LCDA15C-1.TCT achieves stable clamping by using a surge-rated FET as the protection element instead of a PN junction. When triggered, the FET's RDS(on) decreases with increasing current, counteracting thermal effects - resulting in clamping voltage of 27.5–28V from −40°C to +125°C. This behavior is confirmed in the TDS2211P datasheet, which applies identically to LCDA15C-1.TCT.
Is LCDA15C-1.TCT pin-compatible with standard TVS diodes in DFN-6 packages?
No - LCDA15C-1.TCT uses a 3-pin GND / 3-pin IN configuration (pins 1–3 = GND, pins 4–6 = IN), requiring all six terminals to be connected as two groups. Standard unidirectional TVS diodes in DFN-6 typically use anode/cathode/GND or different pinouts; direct replacement is not possible without PCB layout revision.
What is the junction capacitance of LCDA15C-1.TCT and why does it matter?
The LCDA15C-1.TCT exhibits 175pF junction capacitance at 22V and 1MHz. This low value prevents signal distortion or power rail instability on 22V supply lines, especially important in USB PD systems where excessive capacitance could interfere with CC logic detection or cause startup delays in buck-boost converters powered by the same rail.
Can LCDA15C-1.TCT be used for bidirectional data line protection?
No - LCDA15C-1.TCT is designed exclusively for unidirectional power or I/O line protection (GND-referenced). Its architecture and pinout do not support differential or bidirectional signal paths. For USB SuperSpeed, DP/DM, or CC lines, Semtech recommends dedicated low-capacitance devices like RClamp3371ZC or uClamp2411ZA alongside LCDA15C-1.TCT.
LCDA15C-1.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 33V
- Current - Peak Pulse (10/1000µs):
- 15A (8/20µs)
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 8pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
LCDA15C-1.TCT FAQ
1.How can I place an order for LCDA15C-1.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA15C-1.TCT 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 LCDA15C-1.TCT reliable?
The price and inventory of LCDA15C-1.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA15C-1.TCT is usually 5 days.
3.What payment methods are accepted for LCDA15C-1.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA15C-1.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA15C-1.TCT?
LCDA15C-1.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA15C-1.TCT 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 LCDA15C-1.TCT?
For technical support, including LCDA15C-1.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA15C-1.TCT requirements.
6.How does Aetrix verify that LCDA15C-1.TCT is sourced from the original manufacturer or authorized distributors?
All LCDA15C-1.TCT 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 LCDA15C-1.TCT meets industry standards.
7.What is the process for return or replacement of LCDA15C-1.TCT?
All LCDA15C-1.TCT units undergo pre-shipment inspection (PSI). If there is an issue with LCDA15C-1.TCT, 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 LCDA15C-1.TCT part is unused and in its original packaging.
Return procedure for LCDA15C-1.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCDA15C-1.TCT Tags
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