Semtech Corporation M20

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 capability, 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6mm 6-lead package - deployed in USB Type-C PD bus protection.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (20mΩ), junction capacitance (175pF), and compatibility with industrial surge standards (±1kV, RS=42Ω).

Technical Context

The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and drives the shunt FET into low-R_DS(on) conduction. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing FET on-resistance under surge.

It operates across –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 (≈27V breakdown) from clamping behavior, enabling predictable protection margins for 22V systems.

Key Specifications

Pinout & Package

Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging (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 TPD2E001DRYR, the TDS2211P uniquely delivers flat 27.5–28V clamping across 40A and –40°C to +125°C, making it the only option qualified for robust 22V power-rail surge protection in thermally demanding industrial and USB PD applications.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and notebook/tablet V_BUS protection requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

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-energy EOS applications, targeting 22–36V industrial, computing, and USB power delivery systems where clamping stability and temperature resilience are critical.

FAQ

What is the primary protection function of the TDS2211P?

The TDS2211P functions as a transient diverting suppressor that protects 22V-rated power or I/O lines from electrical overstress events including ESD (±30kV), EFT (±4kV), and surge (40A, 8/20μs). It uses a triggered FET architecture to clamp voltage near 27.5–28V - significantly lower and more stable than standard TVS diodes - ensuring reliable protection for USB PD controllers and industrial load switches. The TDS2211P achieves this via low dynamic resistance (20mΩ) and temperature-invariant clamping behavior.

How does the TDS2211P differ from traditional TVS diodes in clamping behavior?

Unlike traditional TVS diodes whose clamping voltage rises linearly with peak pulse current (V_C = V_BR + I_PP × R_DYN), the TDS2211P maintains a nearly constant clamping voltage of 27.5–28V from 24A to 40A due to its FET-based shunt architecture. Its dynamic resistance drops under surge, resulting in flat clamping across current and temperature (–40°C to +125°C). This eliminates the need for conservative derating in thermal or high-current scenarios - a key advantage confirmed in the TDS2211P datasheet Figure 3 clamping comparison.

What are the mandatory PCB layout requirements for the TDS2211P?

All three IN pins (4, 5, 6) and all three GND pins (1, 2, 3) of the TDS2211P must be connected in parallel using short, wide traces - no single-pin connection is sufficient. The device must be placed adjacent to the protected connector (e.g., USB-C receptacle) to minimize trace inductance. Ground connections require multiple vias to an internal ground plane, and no thermal pad is needed since energy is dissipated in the FET channel, not the junction. These requirements are specified in the TDS2211P datasheet Section "PCB Layout Recommendation" (Page 6).

Can the TDS2211P be used for protecting high-speed data lines like USB SuperSpeed?

No - the TDS2211P is not suitable for USB SuperSpeed (SS), DisplayPort, or other high-speed differential data lines due to its 175pF junction capacitance, which would severely degrade signal integrity. It is specifically designed for DC power rails and low-frequency I/O lines such as USB PD V_BUS, load switch inputs, or industrial 22V control buses. For SS lane protection, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), as noted in the TDS2211P datasheet Application Information section.

What surge standards does the TDS2211P meet out-of-the-box?

The TDS2211P meets IEC 61000-4-2 (±30kV contact/air ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (40A, 8/20μs; ±1kV, 1.2/50μs with RS=42Ω) without external components. Its 40A rating satisfies Level 4 surge immunity for industrial equipment, and its 22V working voltage aligns with USB PD 3.0 specifications. Compliance is validated per the absolute maximum ratings and electrical characteristics tables in the official TDS2211P Final Datasheet Rev 2.5.