Semtech Corporation SCBH2

Overview

TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - deployed in USB Type-C PD bus protection and industrial load switch input stages.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat VC response, DFN-6 footprint compatibility, and compliance with IEC 61000-4-4/4-5 surge standards in compact space-constrained designs.

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 FET when transient voltage exceeds V_BR (~27.9V typ). Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing R_DS(on) under surge conditions.

It operates over –40°C to +125°C with stable junction capacitance (175pF @ 22V, 1MHz) and reverse leakage (<600nA @ 22V), enabling reliable protection in thermally demanding environments such as industrial equipment and USB PD controllers where thermal drift of clamping voltage must be minimized.

Key Specifications

Pinout & Package

Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel (3,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely delivers flat 27.5–28V clamping across full 40A surge current and –40°C to +125°C, making it the only viable option for robust 22V power rail protection where voltage margin is constrained and thermal derating must be avoided.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch interfaces, and IoT power rail protection requiring stable component supply, consistent surge performance, and 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 power management, protection, sensing, and connectivity.

The TDS family was developed to replace conventional TVS diodes in high-reliability power and interface protection, targeting applications where clamping voltage stability over temperature and current is critical - especially in USB PD, industrial automation, and ruggedized portable electronics.

FAQ

What is the maximum continuous operating voltage for TDS2211P?

The TDS2211P has a reverse stand-off voltage (V_RWM) of 22V, meaning it can continuously block up to 22V DC without significant leakage or conduction. This makes it suitable for protecting 20V USB PD VBUS lines and other 22V-rated power rails. Exceeding this voltage risks premature conduction and accelerated degradation.

How does TDS2211P achieve constant clamping voltage across varying surge currents?

The TDS2211P achieves constant clamping via a surge-rated FET whose R_DS(on) decreases as surge current increases - counteracting the I×R voltage rise seen in standard TVS diodes. Its trigger circuit activates the FET at ~27.9V, and the resulting clamping stays within 27.5–28V from 24A to 40A, as verified in the datasheet's Figure 3 and Table 2.

Can TDS2211P be used for protecting high-speed data lines like USB 3.2 or PCIe?

No - the TDS2211P has 175pF junction capacitance at 22V, which would severely attenuate signals above ~100MHz. It is intended for power lines (VBUS, load switch inputs) and low-to-medium speed control lines. For high-speed data lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF) alongside the TDS2211P in hybrid protection schemes.

What is the recommended PCB layout for optimal surge performance of TDS2211P?

Place TDS2211P as close as possible to the protected connector. Connect all three IN pins (4,5,6) with a single short, wide trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Avoid stubs or narrow traces - parasitic inductance degrades clamping response during fast ESD events.

Is 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 lead finish is lead-free. Marking code "T22" and date code appear on the top surface, with a laser dot indicating Pin 1 location.