Semtech Corporation 1N6116

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. It delivers ±30kV IEC 61000-4-2 ESD protection, clamps at 27.5–28V under 40A (8/20μs), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C in USB Type-C PD and industrial load-switch input protection.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and peak current, low junction capacitance (175pF), DFN 1.6×1.6mm package constraints, and FET-based shunt architecture versus conventional TVS diodes.

Technical Context

The TDS2211P uses a surge-rated MOSFET as its primary protection element, activated by a precision trigger circuit that senses overvoltage and drives the FET into low-R_DS(on) conduction. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A and across –40°C to +125°C due to decreasing R_DS(on) with increasing current.

It protects one bidirectional line with 22V reverse stand-off voltage (V_RWM), 25–27.9V breakdown (V_BR), and 175pF junction capacitance at 22V/1MHz - optimized for high-speed interfaces where capacitance and clamping predictability are critical.

Key Specifications

Pinout & Package

Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS-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 TPD2S017DRBR, the TDS2211P uniquely combines 40A surge capability, 27.5–28V flat clamping, and 22V working voltage in a single-channel DFN - making it the only option for robust, temperature-stable protection of 22V power buses in USB PD and industrial systems.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load-switch inputs, and IoT 22V power rail protection requiring stable component supply, long-term lifecycle support, and traceable 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 ICs for precision sensing, protection, and connectivity.

The TDS2211P belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power-rail applications demanding flat clamping, wide temperature stability, and high surge endurance.

FAQ

What is the primary protection function of the TDS2211P?

The TDS2211P functions as a transient diverting suppressor that shunts high-energy EOS, ESD, and surge currents to ground using a precision-triggered MOSFET. Unlike TVS diodes, it maintains a stable 27.5–28V clamping voltage across its full 40A (8/20μs) rating and operating temperature range (–40°C to +125°C), protecting downstream components such as USB PD controllers and load switches. The TDS2211P achieves this via low dynamic resistance (20mΩ) and active FET conduction rather than passive junction breakdown.

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

No, the TDS2211P is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V is optimized for power-rail or control-line protection (e.g., USB Type-C VBUS, load-switch enable), not signal integrity-critical paths. For SuperSpeed lanes (TX/RX), Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF). Using the TDS2211P on data lines would cause excessive signal attenuation and jitter. The TDS2211P is explicitly intended for single-line, bidirectional 22V bus protection.

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

The TDS2211P uses a surge-rated FET and precision trigger circuit to achieve near-constant clamping voltage (27.5–28V) across its entire 24–40A peak pulse current range and –40°C to +125°C temperature range. In contrast, standard TVS diodes follow VC = VBR + IPP × RDYN, causing clamping voltage to rise linearly with current and temperature - e.g., a typical 22V TVS may clamp at 38V at 24A and 125°C. This fundamental architectural difference makes the TDS2211P uniquely suited for 22V systems with tight voltage margins, such as USB PD.

What is the correct PCB layout practice for the TDS2211P to achieve rated 40A performance?

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 as close as possible to the protected connector to minimize trace inductance. Splitting or omitting any pin connection degrades surge current handling and clamping performance. No thermal pad is required - energy is dissipated in the FET channel, not the junction.

Is the TDS2211P compliant with industry surge and ESD standards?

Yes, the TDS2211P is explicitly rated to meet key international immunity standards: ±30kV contact and air discharge per IEC 61000-4-2 (ESD), 40A peak pulse current (8/20μs) and ±1kV combination wave (1.2/50μs voltage, 8/20μs current, RS = 42Ω) per IEC 61000-4-5 (surge), and ±4kV EFT per IEC 61000-4-4 (5/50ns, 100kHz/5kHz). These ratings are validated in the official Semtech datasheet Rev 2.5 and apply directly to the TDS2211P without derating.