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Semtech Corporation LR1120DVK1TBKS

Name: LR1120DVK1TBKS
Brand: Semtech Corporation
SKU: LR1120DVK1TBKS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LR1120DVK1TBKS

Manufacturer:: Semtech Corporation

Category:: RF, RFID, Wireless Evaluation Boards

Package:

Datasheet:: LR1120DVK1TBKS.pdf

Description:: LR1120 DEV KIT LORA 868/2.4

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Product details

Overview

LR1120DVK1TBKS 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 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces where stable clamping under temperature and current stress is critical.

For engineers reviewing the LR1120DVK1TBKS datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp FET-based architecture, DFN 1.6×1.6mm 6-lead package, 22V working voltage, low 175pF junction capacitance, and suitability for USB PD, IoT, and industrial equipment surge protection.

Technical Context

The LR1120DVK1TBKS uses a surge-rated MOSFET as the primary shunt element, activated by an integrated precision trigger circuit that turns on the FET when transient voltage exceeds breakdown - enabling near-constant clamping independent of peak current or temperature. Unlike conventional TVS diodes, its clamping voltage remains stable across −40°C to +125°C and 1–40A pulse range due to decreasing R_DS(on) under surge.

It operates in a bidirectional configuration with three input terminals (pins 4–6) tied to the protected line and three ground terminals (pins 1–3), requiring all six pins to be connected for full 40A rating. The device dissipates surge energy in the FET channel rather than a PN junction, eliminating thermal derating limitations typical of silicon avalanche devices.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22 V - supports nominal USB PD bus voltages up to 20 V with 2 V margin before clamping activation
Clamping Voltage	27.5–28 V at 40 A (8/20 μs) - ensures downstream 24 V-rated controllers (e.g., uClamp2411ZA) remain within safe operating limits
Peak Pulse Current	40 A (8/20 μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems
ESD Withstand	±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external staging
Dynamic Resistance	20 mΩ - enables low-voltage overshoot during fast transients and minimizes power dissipation in FET channel
Junction Capacitance	175 pF at 22 V, 1 MHz - compatible with DC power rails and low-speed control lines; not suitable for >100 MHz signal paths
Operating Temperature	−40°C to +125°C - maintains specified clamping and leakage performance across extended industrial ambient ranges

Pinout & Package

LR1120DVK1TBKS is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals must be soldered for rated surge performance.

Pin/Terminal	Circuit Role	Design Meaning
Pins 1, 2, 3	GND	Common ground return path for surge current; multiple vias recommended to minimize inductance and maximize 40 A capability
Pins 4, 5, 6	IN	Parallel-connected input terminals for protected line (e.g., VBUS); all three must be routed to same net for uniform current sharing and full rating

Key Features

Feature	Design Value
FET-based transient diversion	Replaces avalanche diode clamping with active MOSFET shunt, delivering flat clamping vs. current/temperature - eliminates design margin inflation for thermal derating
Constant clamping voltage	27.5–28 V across 1–40 A and −40°C to +125°C - enables reliable protection of 24 V logic without overvoltage risk at end-of-life or high ambient
Low dynamic resistance	20 mΩ - reduces voltage overshoot during sub-microsecond ESD events and improves energy handling efficiency
High EFT immunity	±4 kV per IEC 61000-4-4 (5/50 ns, 5 kHz & 100 kHz) - protects against repetitive burst noise in motor drives and industrial PLC I/O
Space-optimized packaging	1.6 mm × 1.6 mm DFN - saves >60% board area versus SO-8 or SOT-23 TVS solutions while supporting identical 40 A surge rating

Applications

USB Type-C Power Delivery Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20 V/5 A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary high-energy shunt suppressor placed adjacent to connector, clamping transients before they reach PD controller ICs (e.g., STUSB4500, TUSB73x0). Use Value: Maintains 27.5–28 V clamping across temperature and current - avoids overvoltage damage to 24 V-rated PD controllers even at 125°C ambient.	Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P, TPS229xx) in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Front-end EOS protector that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents premature failure of load switches during 1 kV/42 Ω IEC 61000-4-5 surges by holding clamp below 28 V - well below typical 30 V FET breakdown thresholds.
IoT Device Power Rail Protection	Storage Device Interface Protection
Use Scenario: Securing 22 V supply rails in battery-powered edge nodes (e.g., LoRaWAN gateways, smart sensors) deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge immunity on main power input, eliminating multi-stage protection networks. Use Value: Delivers ±30 kV ESD, ±4 kV EFT, and 40 A surge protection in one 1.6 mm² footprint - reduces BOM count and layout complexity for space-constrained PCBs.	Use Scenario: Shielding SATA, eMMC, or UFS power rails in SSDs and embedded storage modules from EOS events during hot-plug or system-level surges. IC Role / Device Role / Timing Role: DC rail protector placed between power connector and PMIC/regulator input, preventing latch-up or burnout in voltage management ICs. Use Value: 175 pF capacitance and <600 nA leakage at 22 V ensure no impact on power sequencing or standby current - critical for low-power storage applications.

USB Type-C Power Delivery Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20 V/5 A PD negotiation, exposed to ESD and lightning-induced surges.

IC Role / Device Role / Timing Role: Primary high-energy shunt suppressor placed adjacent to connector, clamping transients before they reach PD controller ICs (e.g., STUSB4500, TUSB73x0).

Use Value: Maintains 27.5–28 V clamping across temperature and current - avoids overvoltage damage to 24 V-rated PD controllers even at 125°C ambient.

Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P, TPS229xx) in remote meters, robotics, and factory automation.

IC Role / Device Role / Timing Role: Front-end EOS protector that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction.

Use Value: Prevents premature failure of load switches during 1 kV/42 Ω IEC 61000-4-5 surges by holding clamp below 28 V - well below typical 30 V FET breakdown thresholds.

IoT Device Power Rail Protection

Storage Device Interface Protection

Use Scenario: Securing 22 V supply rails in battery-powered edge nodes (e.g., LoRaWAN gateways, smart sensors) deployed in uncontrolled environments.

IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge immunity on main power input, eliminating multi-stage protection networks.

Use Value: Delivers ±30 kV ESD, ±4 kV EFT, and 40 A surge protection in one 1.6 mm² footprint - reduces BOM count and layout complexity for space-constrained PCBs.

Use Scenario: Shielding SATA, eMMC, or UFS power rails in SSDs and embedded storage modules from EOS events during hot-plug or system-level surges.

IC Role / Device Role / Timing Role: DC rail protector placed between power connector and PMIC/regulator input, preventing latch-up or burnout in voltage management ICs.

Use Value: 175 pF capacitance and <600 nA leakage at 22 V ensure no impact on power sequencing or standby current - critical for low-power storage applications.

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, but marked "T22" and shipped in 3,000-unit 7″ reels; LR1120DVK1TBKS is Semtech's branded distribution variant with traceable lot coding.	No functional difference; both qualified for USB PD and industrial use. LR1120DVK1TBKS offers Aetrix's supply chain traceability and volume procurement support.	Select LR1120DVK1TBKS for production programs requiring full lot traceability, scheduled delivery, and lifecycle coordination.
SMAJ22A	Standard unidirectional TVS diode (DO-214AC), 22 V V_RWM, 35.5 V V_C @ 12.3 A - higher clamping, lower surge rating (12.3 A), and strong temperature dependence (clamping rises >3 V from −40°C to +125°C).	Suitable only for lower-energy applications (e.g., legacy USB 2.0 power, non-PD systems); cannot meet 40 A or constant-clamp requirements of modern industrial or USB-C designs.	Choose SMAJ22A only if cost sensitivity outweighs performance - not recommended for USB PD, IoT, or high-reliability industrial use.

Compared with TDS2211P.C, LR1120DVK1TBKS provides identical protection performance with enhanced supply chain visibility; versus SMAJ22A, it delivers 3.2× higher surge current, 8 V lower clamping, and temperature-stable operation - making it essential for next-generation 22 V power rail protection.

Availability

LR1120DVK1TBKS is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device power rails requiring stable component supply, long-term lifecycle assurance, and full compliance with IEC 61000-4-2/4-4/4-5 standards.

Supply support for LR1120DVK1TBKS 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, power management, and transient protection.

The TDS family - including LR1120DVK1TBKS - was engineered to replace conventional TVS diodes in high-reliability 22 V power rail applications, delivering constant clamping via FET-based architecture for USB PD, industrial, and storage markets.

FAQ

What is the maximum continuous operating voltage for LR1120DVK1TBKS?

The LR1120DVK1TBKS has a reverse stand-off voltage (V_RWM) of 22 V, meaning it can continuously block up to 22 V DC without clamping. This matches the maximum nominal voltage of USB Power Delivery 3.0 (20 V) plus safety margin, and is validated across −40°C to +125°C ambient conditions per the official Semtech datasheet Rev 2.5.

Does LR1120DVK1TBKS require a thermal pad on the PCB?

No, LR1120DVK1TBKS does not require a thermal pad. Its DFN package dissipates surge energy in the silicon FET channel, not through junction heating like traditional TVS diodes. The datasheet explicitly states "no thermal pad is needed," and recommends connecting all GND pins (1–3) with multiple vias to reduce inductance instead of adding copper pour under the device.

Can LR1120DVK1TBKS protect high-speed data lines like USB SS or PCIe?

No, LR1120DVK1TBKS is not suitable for high-speed data lines. With 175 pF junction capacitance at 22 V, it would severely degrade signal integrity on SuperSpeed (5+ Gbps), PCIe, or DisplayPort links. It is intended exclusively for DC power rails and low-speed control lines; for data line protection, Semtech recommends RClamp3371ZC (<0.25 pF) alongside LR1120DVK1TBKS.

How does LR1120DVK1TBKS achieve constant clamping voltage across temperature?

LR1120DVK1TBKS achieves constant clamping by using a precision-triggered MOSFET shunt instead of a PN junction. As surge current increases, the FET's R_DS(on) decreases, counteracting voltage rise - and the trigger circuit's breakdown voltage remains stable over temperature. This results in ≤0.5 V variation in V_C from −40°C to +125°C, unlike TVS diodes whose clamping rises >3 V over the same range.

Is LR1120DVK1TBKS compliant with RoHS and REACH regulations?

Yes, LR1120DVK1TBKS is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its molding compound meets UL 94V-0 flammability rating, and lead finish is 100% matte tin - confirmed in the "Mechanical Characteristics" section of the Semtech TDS2211P datasheet Rev 2.5.

LR1120DVK1TBKS Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

Packaging:: Box

Product Status:: Active

Type:: Transceiver; LoRa®

Frequency:: 868MHz, 2.4GHz

Contents:: Board(s)

Utilized IC / Part:: LR1120

LR1120DVK1TBKS FAQ

1.How can I place an order for LR1120DVK1TBKS through Aetrix?

Please submit a Request for Quotation (RFQ) for LR1120DVK1TBKS 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 LR1120DVK1TBKS reliable?

The price and inventory of LR1120DVK1TBKS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LR1120DVK1TBKS is usually 5 days.

3.What payment methods are accepted for LR1120DVK1TBKS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LR1120DVK1TBKS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LR1120DVK1TBKS?

LR1120DVK1TBKS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LR1120DVK1TBKS 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 LR1120DVK1TBKS?

For technical support, including LR1120DVK1TBKS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LR1120DVK1TBKS requirements.

6.How does Aetrix verify that LR1120DVK1TBKS is sourced from the original manufacturer or authorized distributors?

All LR1120DVK1TBKS 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 LR1120DVK1TBKS meets industry standards.

7.What is the process for return or replacement of LR1120DVK1TBKS?

All LR1120DVK1TBKS units undergo pre-shipment inspection (PSI). If there is an issue with LR1120DVK1TBKS, 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 LR1120DVK1TBKS part is unused and in its original packaging.

Return procedure for LR1120DVK1TBKS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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