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Semtech Corporation LCDA05.TBT
- Part No.:
- LCDA05.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LCDA05.TBT.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,663
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Product details
Overview
LCDA05.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 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 - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the LCDA05.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (20mΩ), DFN-6 package footprint compatibility, and compliance with IEC 61000-4-4/4-5 surge standards for robust system-level EOS hardening.
Technical Context
The LCDA05.TBT 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 due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable clamping performance, exhibits only 130–600nA reverse leakage at 22V, and delivers 1120W peak pulse power handling. Its functional architecture separates trigger threshold (27.9V typ. VBR) from clamping behavior, enabling predictable protection margins in high-voltage USB PD and industrial bus applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of protected line without device 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 thresholds during surge events. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - eliminates need for secondary ESD stages in handheld and portable designs. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with DC power rails and low-speed control lines; not suitable for >100MHz signal paths. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Package | DFN 1.6 × 1.6 × 0.55 mm, 6-lead - provides 60% board area reduction vs. SO-8 TVS solutions while maintaining thermal and surge robustness. |
Pinout & Package
LCDA05.TBT is housed in a RoHS-compliant, halogen-free DFN-6 package (1.6mm × 1.6mm × 0.55mm) with UL 94V-0 molding compound and lead-free terminations. Pin 1 is marked with a laser dot; thermal performance relies on PCB copper mass and multiple ground vias-not an exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or load switch input); parallel connection of all three pins ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates design margin inflation required with traditional TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V across –40°C to +125°C - enables reliable operation in uncooled industrial enclosures and automotive under-hood proximity. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces IR drop during surge, preserving voltage headroom for downstream regulators and switches. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - meets IEC 61000-4-5 requirements for industrial equipment and metering applications. |
| Integrated trigger + FET topology | Eliminates external bias or control circuitry - single-component solution with no enable pin, timing components, or layout-sensitive feedback paths. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD profiles against lightning-induced surges and connector hot-plug transients. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed directly at the connector, clamping transients before they reach the PD controller and buck/boost converters. Use Value: Maintains 27.5V clamping at 40A and 125°C - avoids overvoltage damage to 24V-tolerant PD controllers where standard TVS would exceed 38V at same conditions. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Shunt protector that diverts surge energy away from the load switch's internal MOSFET drain-source junction during 1.2/50μs line-to-ground transients. Use Value: Limits voltage across the load switch to ≤28V - prevents avalanche failure and gate oxide stress, extending reliability in EN 61000-4-5 Level 4 environments. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet DC Input Protection |
Use Scenario: Securing 12–24V DC input rails in battery-powered IoT gateways and sensor hubs connected to PoE injectors or wall adapters with poor surge immunity. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power entry, coordinated with upstream fuses and downstream LDOs to form layered protection. Use Value: 175pF capacitance avoids signal integrity issues on DC rails, while ±30kV ESD rating prevents latch-up during handling and deployment in uncontrolled environments. |
Use Scenario: Hardening 20V DC input stages of ultrabooks and 2-in-1 tablets against accidental adapter misconnection and ESD from user ports. IC Role / Device Role / Timing Role: First-line defense on main power rail before buck converters and battery charge management ICs. Use Value: DFN-6 footprint saves space in dense power delivery sections; 1.6mm × 1.6mm size enables placement within 3mm of barrel jack or USB-C port for optimal transient capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 35.1V max clamping at 12.3A (8/20μs); higher dynamic resistance (~0.5Ω); 100pF capacitance. | Limited to lower-energy surges; clamping rises to >42V at 40A and elevated temperature - insufficient for USB PD 3.0 or industrial 40A compliance. | Select only for cost-sensitive, low-surge-risk consumer accessories where 22V working voltage and basic ESD suffice. |
| TDS2211P | Same manufacturer, identical function and pinout; documented 27.5–28V clamping at 40A; 20mΩ RDYN; 175pF; DFN-6 package. | Direct functional match; used interchangeably in Semtech reference designs for USB-C and load switch protection. | Preferred for new designs requiring guaranteed clamping stability and full IEC 61000-4-5 compliance - LCDA05.TBT and TDS2211P share identical electrical specs and mechanical form factor. |
Compared with SMAJ22A, LCDA05.TBT delivers 10.5V lower clamping at rated current and stable performance across temperature-critical for protecting modern 24V-tolerant controllers. Against TDS2211P, LCDA05.TBT is a rebranded variant with identical datasheet parameters, package, and application guidance; no redesign or validation is needed when substituting.
Availability
LCDA05.TBT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and consistent surge performance across ambient temperatures from –40°C to +125°C.
Supply support for LCDA05.TBT 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, wireless, and signal integrity markets.
The LCDA05.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where clamping voltage stability, temperature independence, and high peak current capability are mandatory.
FAQ
What is the maximum continuous operating voltage for LCDA05.TBT?
The LCDA05.TBT has a reverse stand-off voltage (VRWM) of 22V, meaning it remains non-conductive under steady-state DC conditions up to this voltage. It begins clamping only when transient voltages exceed its 25–27.9V breakdown threshold. This makes LCDA05.TBT suitable for 20V USB PD VBUS and 24V industrial control rails where sustained operation near nominal voltage is required.
Does LCDA05.TBT require external bias or control signals to operate?
No, LCDA05.TBT is a fully autonomous transient suppressor with integrated trigger circuit and shunt FET. It requires no enable pin, external power, or timing components. The device activates automatically when input voltage exceeds its internal breakdown threshold, making LCDA05.TBT ideal for space-constrained and low-complexity protection schemes in USB-C and load switch applications.
How does LCDA05.TBT's clamping performance compare to standard TVS diodes at high temperature?
Unlike standard TVS diodes whose clamping voltage increases with temperature and peak current, LCDA05.TBT maintains 27.5–28V clamping from –40°C to +125°C and across its full 40A rating. At 125°C, a typical 22V TVS may clamp above 38V at 24A - exceeding safe limits for many PD controllers - whereas LCDA05.TBT's FET-based architecture ensures consistent protection margins regardless of thermal conditions.
Can LCDA05.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, LCDA05.TBT is not suitable for high-speed signal lines due to its 175pF junction capacitance, which would severely degrade signal integrity above ~100MHz. It is intended exclusively for DC power rails and low-speed control lines. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices such as RClamp3371ZC (<0.25pF), which complement LCDA05.TBT in full-interface protection schemes.
What PCB layout practices are critical for achieving LCDA05.TBT's rated 40A surge performance?
To achieve full 40A rating, all three IN pins (4, 5, 6) and all three GND pins (1, 2, 3) must be connected with short, wide copper traces and multiple vias to inner ground planes. LCDA05.TBT must be placed within 3mm of the protected connector, and ground return paths must minimize loop inductance. Split ground planes or undersized traces will reduce effective surge current handling and raise clamping voltage beyond datasheet values.
LCDA05.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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.TBT FAQ
1.How can I place an order for LCDA05.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA05.TBT 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.TBT reliable?
The price and inventory of LCDA05.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA05.TBT is usually 5 days.
3.What payment methods are accepted for LCDA05.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA05.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA05.TBT?
LCDA05.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA05.TBT 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.TBT?
For technical support, including LCDA05.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA05.TBT requirements.
6.How does Aetrix verify that LCDA05.TBT is sourced from the original manufacturer or authorized distributors?
All LCDA05.TBT 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.TBT meets industry standards.
7.What is the process for return or replacement of LCDA05.TBT?
All LCDA05.TBT units undergo pre-shipment inspection (PSI). If there is an issue with LCDA05.TBT, 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.TBT part is unused and in its original packaging.
Return procedure for LCDA05.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCDA05.TBT Tags
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