Semtech Corporation F60A

Overview

TDS2211P from Semtech is a transient diverting suppressor designed to protect single 22V I/O or power lines against high-energy EOS events including ±30kV ESD (IEC 61000-4-2), 40A surge (8/20μs), and ±4kV EFT (IEC 61000-4-4); it delivers stable 27.5–28V clamping across 24–40A and −40°C to +125°C, used in USB Type-C PD bus protection.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability over temperature and current, dynamic resistance ≤20mΩ, junction capacitance of 175pF at 22V, DFN 1.6×1.6mm 6-lead layout constraints, and compatibility with load switch input protection schemes.

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. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing R_DS(on) under surge conditions.

It operates across −40°C to +125°C with guaranteed clamping at 27.5–28V for 24A and 40A (1.2/50μs + 8/20μs combination waveform, R_S = 2Ω), and maintains <600nA reverse leakage at 22V while offering 1120W peak pulse power handling.

Key Specifications

Pinout & Package

Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and SP1003-02HTG, the TDS2211P provides uniquely stable 28V clamping across temperature and current-critical for protecting modern 24V-tolerant PD controllers and load switches where voltage margin is tight and thermal environment is variable.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and consistent surge performance.

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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity.

The TDS family was engineered specifically to replace conventional TVS diodes in high-reliability power-line protection, delivering flat clamping response using integrated FET-triggered architecture for automotive, industrial, and USB-C applications.

FAQ

What is the primary protection function of the TDS2211P?

The TDS2211P functions as a transient diverting suppressor that actively shunts high-energy EOS events-including ±30kV ESD, 40A surges (8/20μs), and ±4kV EFT-to ground via an integrated surge-rated FET. Unlike passive TVS diodes, it maintains a near-constant 27.5–28V clamping voltage across its full operating temperature range (−40°C to +125°C) and peak pulse current range (24–40A), making the TDS2211P ideal for protecting sensitive 22V-rated components such as USB PD controllers and load switches.

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

The TDS2211P uses a precision-triggered FET instead of a pn-junction diode, resulting in clamping voltage that remains stable at ~28V across 24–40A and −40°C to +125°C. In contrast, standard TVS diodes exhibit linearly rising clamping (e.g., V_C = V_BR + I_PP × R_DYN)-a 22V SMAJ22A may clamp above 40V at 40A and degrade further at elevated temperatures. This fundamental difference makes the TDS2211P uniquely suited for applications where voltage margin is constrained, such as USB-C PD bus protection.

Can the TDS2211P be used on high-speed data lines like USB SuperSpeed or DisplayPort?

No-the TDS2211P is not suitable for high-speed data lines due to its 175pF junction capacitance at 22V, which would severely attenuate signals above ~100MHz. It is explicitly designed for DC or low-frequency power line protection (e.g., V_Bus, load switch inputs). For USB SuperSpeed, DP, or DM lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); the TDS2211P should only be applied to the power rail in coordinated protection schemes.

What PCB layout practices are required to achieve full 40A surge rating for the TDS2211P?

To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be shorted together with a low-inductance trace, and all three GND pins (1, 2, 3) must connect directly to a solid ground plane using multiple vias. The device must be placed within 5mm of the protected connector to minimize trace inductance. Splitting or omitting any pin connection reduces surge current sharing and degrades clamping performance-verified in Semtech's layout guidelines (Figure 7, Rev 2.5 datasheet).

Is the TDS2211P RoHS-compliant and halogen-free?

Yes-the TDS2211P is certified Pb-free, halogen-free, and compliant with both RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and the lead finish is fully lead-free. Marking code "T22" with date code appears on the top surface, and the device ships in 7-inch tape-and-reel packaging with 3,000 units per reel-fully aligned with modern environmental and manufacturing requirements.