Semtech Corporation 1N6165

Overview

TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V voltage buses or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and ultra-low 20mΩ dynamic resistance. It protects USB Type-C power delivery lines, load switch inputs, and industrial I/O interfaces where stable clamping under temperature and current stress is critical.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp FET-based architecture, DFN 1.6×1.6mm 6-lead package with triple parallel input/ground terminals, and verified performance in USB PD, IoT, and industrial surge environments per IEC 61000-4-4/5.

Technical Context

The TDS2211P uses a surge-rated FET as the primary shunt element, activated by a precision trigger circuit when transient voltage exceeds breakdown-enabling near-constant clamping independent of peak current. Its operation differs fundamentally from conventional TVS diodes by eliminating the V_BR + I_PP×R_DYN voltage rise.

Clamping remains stable from −40°C to +125°C due to the FET's decreasing R_DS(on) under surge, delivering 27.5–28V at both 24A and 40A (1.2/50μs + 8/20μs combination waveform, R_S = 2Ω). The device supports unsymmetrical line protection with ±1kV surge rating (1.2/50μs, R_S = 42Ω, C_S = 0.5μF).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely delivers 40A surge capability with sub-28V clamping across full temperature range - making it the only single-device solution qualified for USB PD, industrial load switch, and 22V IoT power rail protection without design compromises.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and 22V IoT edge node power rails requiring stable component supply 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 connectivity.

The TDS family was engineered specifically for high-reliability EOS protection in next-generation power interfaces - targeting USB PD, industrial I/O, and automotive body electronics where conventional TVS limitations compromise system robustness.

FAQ

What is the primary protection function of the TDS2211P?

The TDS2211P functions as a transient diverting suppressor that actively shunts high-energy electrical overstress (EOS) events-including ESD, EFT, and lightning surges-to ground using a precision-triggered surge-rated FET. Unlike passive TVS diodes, it maintains a stable 27.5–28V clamping voltage across its full 40A peak pulse current range and −40°C to +125°C operating temperature, making the TDS2211P ideal for protecting 22V power rails in USB PD and industrial systems.

How does the TDS2211P differ from standard TVS diodes like SMAJ22A?

The TDS2211P uses an active FET-based clamping architecture, resulting in near-constant 27.5–28V clamping from 1A to 40A and minimal temperature drift, whereas SMAJ22A relies on a fixed-junction dynamic resistance causing clamping voltage to rise linearly with current (e.g., ~35V at 12A) and degrade significantly above 85°C. This makes the TDS2211P uniquely capable of protecting 24V-rated ICs under worst-case surge and thermal conditions where SMAJ22A would fail.

What is the correct PCB layout practice for the TDS2211P to achieve full 40A surge rating?

To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be connected via a single low-inductance trace to the protected bus, and all three GND pins (1, 2, 3) must be tied directly to a solid ground plane using multiple vias. The device must be placed within 5 mm of the connector entry point. Splitting connections or omitting any pin reduces surge current capacity and compromises clamping performance - verified in Semtech's layout guidelines and functional testing of the TDS2211P.

Can the TDS2211P be used to protect USB Type-C CC and SBU lines?

No - the TDS2211P is rated for 22V working voltage and optimized for power rail or high-current I/O protection, not low-voltage, high-speed data lines. For CC and SBU lines, Semtech specifies uClamp2411ZA (24V, low-capacitance ESD protector). Using the TDS2211P on CC/SBU would introduce excessive capacitance (175pF) and risk signal integrity failure; its triple-terminal layout also lacks the differential or bidirectional configuration needed for those lines. The TDS2211P is intended exclusively for VBUS and load switch input protection.

Does the TDS2211P require external biasing or control signals to operate?

No - the TDS2211P is a fully autonomous, passive-acting device with no external pins for enable, control, or bias. Its internal trigger circuit senses overvoltage across the IN-to-GND path and automatically activates the shunt FET within nanoseconds. There are no configuration registers, no power supply connections beyond IN and GND, and no timing dependencies - the TDS2211P operates immediately upon installation in-circuit, making it drop-in compatible with existing 22V protection layouts requiring no firmware or hardware redesign.