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Semtech Corporation LCDA05.T
- Part No.:
- LCDA05.T
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LCDA05.T.pdf
- Description:
- TVS DIODE 5V 11V 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,950
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Product details
Overview
LCDA05.T from Semtech is a transient diverting suppressor 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 175pF junction capacitance at 22V - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the LCDA05.T 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 embedded and portable systems.
Technical Context
The LCDA05.T 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 1A–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with <20mΩ dynamic resistance, 22V reverse stand-off voltage, and stable 27.5–28V clamping up to 40A - enabling robust protection without thermal derating penalties typical of junction-based TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail tolerances without false triggering. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - stays below 30V damage threshold of common 28V-rated load switches and PD controllers. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 requirements for consumer and industrial end-equipment. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 3 (±1kV, RS=42Ω) for unsymmetrical line surges. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for DC power rails and moderate-speed control lines, not suitable for >100MHz signal paths. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
LCDA05.T is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals must be connected for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path; all three must be soldered to PCB ground plane with multiple vias to minimize inductance during 40A surge events. |
| Pins 4, 5, 6 | IN | Protected line input; tied together externally to connect to VBus or power rail - ensures uniform current sharing and maximum surge handling. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-spec'ing IPP to meet voltage margin targets. |
| Temperature-stable protection | Clamping remains 27.5–28V from –40°C to +125°C - removes thermal derating calculations required for standard TVS diodes. |
| Low dynamic resistance | 20mΩ enables sub-1V overshoot during 100A/μs dV/dt events - critical for protecting sensitive gate drivers and PD controllers. |
| DFN-6 space efficiency | 1.6mm × 1.6mm footprint saves >60% board area vs. SOT-23 TVS solutions rated for comparable surge energy. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller/load switch, clamping surges before they reach IC inputs. Use Value: Maintains 27.5–28V clamping across temperature and current range - avoids overvoltage damage to 28V-rated controllers like TUSB1046 or FUSB302. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., TPS22990, MPQ6535) in remote meters and robotics against 1kV/42Ω surges. IC Role / Device Role / Timing Role: Primary front-end EOS protector on VIN rail, limiting transient voltage seen by internal FET gate oxide. Use Value: Prevents gate-oxide rupture by holding clamping below 30V - extends reliability beyond standard TVS solutions that exceed 35V at 125°C. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet DC Power Input Protection |
Use Scenario: Securing 12–24V input rails in battery-powered IoT gateways subjected to ESD during field servicing and induced surges in factory environments. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry point, coordinated with upstream fuse and downstream LDO. Use Value: Delivers 40A surge handling in 2.56mm² footprint - enables compact, fanless enclosure designs without compromising surge immunity. |
Use Scenario: Protecting 19–20V DC-in jacks in ultrabooks and tablets against accidental AC adapter misconnection and ESD from user interface ports. IC Role / Device Role / Timing Role: First-line defense on adapter input path, placed before buck converter and battery charge management IC. Use Value: 175pF capacitance avoids affecting 100kHz–2MHz switching regulator stability - unlike higher-capacitance TVS arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and DFN-6 package - LCDA05.T is Semtech's alternate marking for TDS2211P per official ordering documentation. | No functional difference; used interchangeably in USB-C and industrial designs requiring 22V standoff. | Select LCDA05.T when sourcing from Aetrix Electronics; identical performance and qualification to TDS2211P. |
| uClamp2411ZA | 24V working voltage, lower 22V clamping (typ. 22V @ 24A), but only rated for 24A IPP and 12V/24V CC/SBU line use - not rated for 40A or power rail duty. | Intended for USB-C CC/SBU lines, not VBus or load switch inputs; lacks thermal stability above 85°C. | Use uClamp2411ZA only for auxiliary signal lines; LCDA05.T remains mandatory for 22V power rail protection requiring 40A surge rating. |
Compared with TDS2211P, LCDA05.T offers identical performance and form factor as a direct alternate marking; versus uClamp2411ZA, LCDA05.T provides 67% higher peak current rating, extended temperature stability, and validated suitability for 22V power bus protection - making it the sole qualified option for high-energy industrial and USB PD applications.
Availability
LCDA05.T is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for LCDA05.T 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.
LCDA05.T belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping and temperature independence are critical.
FAQ
What is the exact function of LCDA05.T in a circuit?
LCDA05.T functions as a transient diverting suppressor that protects 22V-rated power or I/O lines from EOS events including ESD, lightning surges, and EFT. It uses a triggered FET architecture to clamp transients to 27.5–28V while conducting up to 40A, maintaining stable performance from –40°C to +125°C. The LCDA05.T does not regulate voltage or provide steady-state current limiting - it activates only during overvoltage transients.
Is LCDA05.T pin-compatible with standard TVS diodes in DFN-6 packages?
No - LCDA05.T has a unique 3-pin input / 3-pin ground configuration (Pins 4–6 = IN, Pins 1–3 = GND), unlike bidirectional TVS diodes that typically use anode/cathode or single-input layouts. Its pinout requires dedicated PCB layout with parallel routing of all three IN pins and all three GND pins to achieve rated 40A performance. Substituting a standard TVS without redesign will compromise surge capability.
Does LCDA05.T require external biasing or control signals to operate?
No - LCDA05.T is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET; no external voltage, enable signal, or bias resistor is needed. It remains in high-impedance standby until transient voltage exceeds its 25–27.9V breakdown threshold, then automatically shunts current to ground within nanoseconds.
Can LCDA05.T be used on high-speed data lines such as USB SuperSpeed or PCIe?
No - LCDA05.T's 175pF junction capacitance at 22V is too high for signal integrity on >1Gbps differential lines. It is intended exclusively for DC power rails and low-speed control lines (e.g., USB-C CC, load switch EN, PMIC OVP inputs). For SuperSpeed lanes, Semtech recommends RClamp3371ZC (<0.25pF) instead of LCDA05.T.
What is the meaning of "Transient Diverting Suppressor" versus "TVS Diode" for LCDA05.T?
Unlike TVS diodes that clamp via avalanche breakdown with rising voltage proportional to current (VC = VBR + IPP × RDYN), LCDA05.T uses a triggered FET to achieve near-constant clamping voltage across its entire 1–40A surge range. This eliminates thermal runaway risk and removes temperature-dependent derating - making LCDA05.T a fundamentally different protection mechanism optimized for high-energy, high-reliability power rail applications.
LCDA05.T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LCDA05.T FAQ
1.How can I place an order for LCDA05.T through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA05.T 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 LCDA05.T reliable?
The price and inventory of LCDA05.T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA05.T is usually 5 days.
3.What payment methods are accepted for LCDA05.T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA05.T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA05.T?
LCDA05.T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA05.T 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 LCDA05.T?
For technical support, including LCDA05.T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA05.T requirements.
6.How does Aetrix verify that LCDA05.T is sourced from the original manufacturer or authorized distributors?
All LCDA05.T 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 LCDA05.T meets industry standards.
7.What is the process for return or replacement of LCDA05.T?
All LCDA05.T units undergo pre-shipment inspection (PSI). If there is an issue with LCDA05.T, 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 LCDA05.T part is unused and in its original packaging.
Return procedure for LCDA05.T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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