Semtech Corporation LLCC68IMLTRT

Overview

TDS2211P 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 (8/20μs) peak pulse current handling, and stable 27.5–28V clamping across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with 22V bus systems requiring robust EOS resilience without TVS-like voltage drift.

Technical Context

The TDS2211P 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 - enabling near-constant clamping independent of peak current magnitude. Its dynamic resistance is just 20mΩ (8/20μs), far lower than conventional TVS diodes.

Unlike standard TVS devices whose clamping voltage rises linearly with IPP (VC = VBR + IPP × RDYN), the TDS2211P maintains ~27.5–28V clamping from 24A to 40A and across –40°C to +125°C due to decreasing RDS(on) under surge. It protects one bidirectional line with 22V reverse stand-off and 27.9V typical breakdown.

Key Specifications

Pinout & Package

Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), Pb-free, RoHS-compliant, UL 94V-0 molding compound. Exposed thermal pad not required; all six terminals are functional signal/GND connections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient protection applications.

Compared with SMAJ22A and SP1003-220K, the TDS2211P delivers uniquely stable 27.5–28V clamping across full 40A and –40°C to +125°C range - enabling robust 22V system protection without thermal or current derating, unlike TVS alternatives whose clamping degrades significantly under real-world stress.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT edge node power buses, and storage device 22V rails requiring stable component supply with guaranteed long-term lifecycle support.

Supply support for TDS2211P 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 semiconductors for precision sensing, protection, and connectivity.

The TDS series was developed to replace conventional TVS diodes in high-reliability 22V–36V power rail protection, delivering flat-clamp performance using integrated FET+trigger architecture - targeting USB-C, industrial automation, and ruggedized IoT endpoints.

FAQ

What is the primary protection mechanism used in the TDS2211P?

The TDS2211P uses a surge-rated MOSFET as its core protection element, triggered by a precision voltage-sensing circuit. When an overvoltage event exceeds the breakdown threshold, the trigger activates the drive circuit to turn on the FET shunt path - diverting surge current to ground with minimal voltage rise. This architecture enables the TDS2211P to maintain stable clamping voltage across wide current and temperature ranges, unlike conventional TVS diodes.

Can the TDS2211P be used to protect high-speed data lines like USB SuperSpeed or PCIe?

No - the TDS2211P is not suitable for high-speed data line protection due to its 175pF junction capacitance at 22V, which would severely degrade signal integrity on differential pairs operating above 100MHz. It is specifically designed for 22V power or low-frequency I/O line protection. For USB SS, DP/DM, or CC lines, Semtech recommends low-capacitance devices such as RClamp3371ZC (<0.25pF) or uClamp2411ZA.

How should the TDS2211P be laid out on the PCB to achieve full 40A surge rating?

To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be connected via a single short, wide trace to the protected line, and all three GND pins (1, 2, 3) must be tied together and connected to the ground plane using ≥4 vias within 2mm. The TDS2211P must be placed within 3mm of the connector entry point to minimize inductive coupling - layout deviations reduce effective surge current handling and clamping performance.

Does the TDS2211P require a thermal pad or heatsink for 40A surge events?

No - the TDS2211P does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy with extremely low ON-resistance (20mΩ), minimizing joule heating. The DFN-6 package is designed for transient energy absorption without thermal derating; however, proper PCB copper pour and via count are essential to handle peak current without trace melting.

Is the TDS2211P compliant with RoHS and halogen-free standards?

Yes - the TDS2211P is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and the lead finish is matte tin. The device is supplied in tape-and-reel packaging (3,000 units per 7-inch reel), with marking code "T22" followed by date code.