Semtech Corporation S3HVM7.5

Overview

TDS2211P from Semtech is a transient diverting suppressor designed to protect 22V-rated I/O or power lines against EOS, ESD, and surge events using a shunt FET architecture; it delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance for stable low-voltage clamping in USB PD and industrial load switch inputs.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp behavior across temperature and current, DFN 1.6×1.6mm 6-lead package footprint, 175pF junction capacitance at 22V, and suitability for high-reliability bus protection where conventional TVS diodes exhibit rising clamping voltage with IPP or temperature.

Technical Context

The TDS2211P employs a precision-triggered surge-rated FET as its primary protection element, activated only during overvoltage transients-unlike passive TVS diodes, it avoids leakage and capacitance penalties during normal operation. Its trigger circuit initiates conduction when input voltage exceeds ~25V breakdown, enabling the FET to enter low-R_DS(on) state and clamp near V_BR.

This architecture yields near-constant clamping voltage (27.5–28V) from 24A to 40A and across –40°C to +125°C, with dynamic resistance of 20mΩ measured between 1A and 40A. It protects one unidirectional line (IN-to-GND), supports unsymmetrical surge standards (±1kV, 1.2/50μs + 8/20μs, R_S=42Ω), and dissipates energy in the FET channel-not the junction-enabling higher thermal robustness.

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 units/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SP1003-02HTG and SMAJ22A, the TDS2211P provides superior thermal stability and lower clamping voltage under high-current surge-critical for protecting modern 24V-tolerant controllers without overdesigning PCB layout or thermal management.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and notebook/tablet main power rails requiring stable component supply, full production traceability, 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 semiconductor company specializing in high-performance analog and mixed-signal semiconductors for power management, protection, and signal integrity applications.

The TDS family was engineered specifically to replace conventional TVS diodes in high-reliability 20–30V power-line protection, delivering constant clamping via active FET switching-targeting USB PD, industrial automation, and rugged computing markets.

FAQ

What is the primary protection mechanism used in the TDS2211P?

The TDS2211P uses a precision-triggered surge-rated FET as its core protection element. Unlike passive TVS diodes, it remains non-conductive during normal operation and activates only during overvoltage transients-clamping via low-R_DS(on) conduction to ground. This architecture delivers stable 27.5–28V clamping across 24–40A and –40°C to +125°C, as confirmed in the Semtech TDS2211P datasheet Rev 2.5.

Can the TDS2211P be used to protect bidirectional signal lines like USB DP/DM?

No-the TDS2211P is designed exclusively for unidirectional protection of power or I/O lines referenced to ground (IN-to-GND). Its functional diagram, pin configuration (IN on pins 4–6, GND on pins 1–3), and electrical specifications (e.g., forward voltage of 0.5V) confirm asymmetrical operation. For bidirectional high-speed lines such as USB DP/DM, Semtech recommends low-capacitance TVS devices like RClamp3371ZC-not the TDS2211P.

What is the maximum allowable continuous operating voltage for the TDS2211P?

The TDS2211P has a reverse stand-off voltage (V_RWM) of 22V, meaning it can safely withstand up to 22V DC or RMS voltage continuously without significant leakage or degradation. This value is specified in the Electrical Characteristics table of the official datasheet and aligns with its use in 20V USB PD and 22V industrial power rails. Exceeding 22V risks premature triggering or accelerated wear.

How does the TDS2211P compare to standard TVS diodes in terms of temperature stability?

The TDS2211P maintains nearly constant clamping voltage (27.5–28V) across –40°C to +125°C, whereas standard TVS diodes exhibit rising clamping with temperature due to increasing dynamic resistance and junction voltage drift. The TDS2211P's FET-based architecture eliminates this dependency-confirmed by Figure 3 and "Clamping Voltage vs. Temperature" plots in the Semtech TDS2211P datasheet Rev 2.5.

Is the TDS2211P RoHS compliant and what is its package marking code?

Yes, the TDS2211P is Pb-free, halogen-free, and RoHS/WEEE compliant, with UL 94V-0 flammability rating. Its top-side marking consists of "T22" followed by a two-digit date code (e.g., T2223), with a laser dot indicating Pin 1 location-per the Marking Code section on page 9 of the Semtech TDS2211P datasheet Rev 2.5. This marking applies to all TDS2211P.C orderable variants.