Semtech Corporation SCPA4F

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 DFN 1.6×1.6×0.55mm 6-lead package - 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 (<20mΩ), junction capacitance (175pF @ 22V), and verified compatibility with 22V working voltage systems requiring robust surge immunity per IEC 61000-4-5.

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 conditions.

It operates across –40°C to +125°C with stable clamping performance, exhibits 130–600nA reverse leakage at 22V, and delivers 1120W peak pulse power (8/20μs). Its functional architecture enables superior thermal resilience and lower voltage overshoot compared to standard TVS devices in high-energy transients.

Key Specifications

Pinout & Package

Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 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 SP1003-02HTG and SM712-02HTG, the TDS2211P uniquely combines 22V working voltage, 40A surge rating, and flat 27.5–28V clamping - enabling single-device protection of high-power USB-C PD and industrial 22V rails where TVS alternatives fail to meet both voltage and energy requirements simultaneously.

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

The TDS series is Semtech's proprietary transient diverting suppressor product line, engineered to replace conventional TVS diodes in high-energy EOS applications where clamping stability, temperature resilience, and surge margin are critical.

FAQ

What is the maximum continuous operating voltage for the TDS2211P?

The TDS2211P has a reverse stand-off voltage (V_RWM) of 22V, meaning it can continuously withstand up to 22V DC on its IN pins relative to GND without triggering. This makes the TDS2211P suitable for protecting 22V power rails such as USB-C PD VBUS, industrial 24V nominal systems, and notebook auxiliary supplies. Exceeding this voltage risks premature conduction and reliability degradation.

How does the TDS2211P achieve constant clamping voltage across surge current and temperature?

The TDS2211P achieves constant clamping through its FET-based architecture: a precision trigger circuit activates a low-R_DS(on) shunt FET during overvoltage events, and the FET's on-resistance decreases as surge current increases - counteracting voltage rise. This results in stable 27.5–28V clamping from –40°C to +125°C and 24–40A, unlike TVS diodes whose clamping rises linearly with current and temperature. The TDS2211P's design eliminates the need for derating in harsh thermal environments.

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

No - the TDS2211P is not intended for high-speed data line protection due to its 175pF junction capacitance, which would severely degrade signal integrity on differential pairs operating above ~100Mbps. It is specifically designed for 22V power rails and medium-speed control lines (e.g., USB PD CC/SBU, load switch enable). For SuperSpeed lanes, Semtech recommends low-capacitance TVS devices like RClamp3371ZC (<0.25pF), as documented in the TDS2211P application notes.

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

For optimal surge performance, place the TDS2211P as close as possible to the protected connector or entry point. Connect all three IN pins (4, 5, 6) via 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 thermal relief on GND pads and minimize trace length to reduce parasitic inductance - critical for maintaining <28V clamping during fast-rising ESD and surge events. The TDS2211P datasheet provides exact land pattern dimensions for DFN 1.6×1.6mm.

Is the TDS2211P RoHS compliant and halogen free?

Yes, the TDS2211P is fully RoHS/WEEE compliant and halogen free, with lead-free terminal finish and UL 94V-0 rated molding compound. It meets global environmental compliance standards required for industrial, computing, and consumer electronics. The device is supplied in tape-and-reel packaging (3,000 units per 7-inch reel), and marking includes "T22" followed by date code. No exemptions or exceptions apply to its compliance status.