Semtech Corporation SET111404

Overview

TDS2211P from Semtech is a transient diverting suppressor designed to protect single 22V I/O or power lines against high-energy EOS events, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current capability, and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD bus protection and load switch input safeguarding.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with industrial-grade operating temperatures from –40°C to +125°C.

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 FET when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing R_DS(on) under increasing IPP - delivering 27.5–28V clamping at both 24A and 40A (1.2/50μs + 8/20μs combination waveform, R_S = 2Ω).

It operates over –40°C to +125°C with <600nA reverse leakage at 22V, 20mΩ dynamic resistance (measured 1–40A, 8/20μs), and maintains stable clamping across temperature - unlike standard TVS devices whose V_C rises with both current and ambient temperature.

Key Specifications

Pinout & Package

Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), RoHS-compliant, Pb-free, UL 94V-0 molding compound, marked "T22" + date code.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NUP4201MR6T1G and SMAJ22A, the TDS2211P uniquely delivers 40A surge handling with stable 27.5–28V clamping across –40°C to +125°C in a 1.6×1.6mm footprint - making it the only option qualified for high-reliability USB PD and industrial load switch protection where voltage margin and thermal consistency are design-critical.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and 22V IoT power rail designs requiring stable component supply, long-term lifecycle assurance, and compliance with IEC 61000-4-2/4-4/4-5 standards.

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 - with leadership in transient suppression, LoRa® wireless, and signal integrity solutions.

The TDS family was developed to replace conventional TVS diodes in high-reliability 12–36V systems, targeting applications where clamping voltage stability, temperature resilience, and compact layout are essential - especially in USB PD, industrial automation, and ruggedized IoT endpoints.

FAQ

What is the primary protection mechanism used in the TDS2211P?

The TDS2211P uses a surge-rated FET activated by a precision trigger circuit - not a conventional pn-junction TVS. When an EOS event exceeds the trigger threshold, the FET turns on as a low-resistance shunt to ground, delivering stable clamping voltage. This architecture is fundamentally different from passive TVS diodes and is why the TDS2211P achieves flat 27.5–28V clamping across its full 40A rating and operating temperature range.

Can the TDS2211P be used to protect USB Type-C SuperSpeed differential pairs?

No - the TDS2211P is designed for single-ended 22V bus protection (e.g., V_BUS, CC, or load switch inputs), not high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on USB 3.x or DisplayPort lanes. For SuperSpeed protection, Semtech recommends low-capacitance TVS like RClamp3371ZC (<0.25pF), which is explicitly specified for those use cases alongside the TDS2211P in complete USB Type-C protection schematics.

Why does the TDS2211P require all six pins to be connected?

All three GND pins (1–3) and all three IN pins (4–6) must be connected to achieve rated 40A surge performance. Internally, the GND pins are tied together to minimize inductance in the return path, while the IN pins are paralleled to distribute surge current and reduce parasitic impedance. Leaving any pin unconnected degrades peak current handling, clamping stability, and thermal dissipation - violating the validated layout and test conditions defined in the TDS2211P datasheet.

How does the TDS2211P compare to standard TVS diodes in temperature performance?

Unlike standard TVS diodes - whose clamping voltage increases linearly with both peak pulse current and ambient temperature - the TDS2211P maintains 27.5–28V clamping from –40°C to +125°C at 40A. This is due to its FET-based architecture, where R_DS(on) decreases under surge, counteracting thermal drift. In contrast, a typical 22V TVS may clamp at ~38V at 125°C and 24A, risking damage to 30V-rated PD controllers - a key reliability advantage of the TDS2211P.

Is the TDS2211P compliant with RoHS and halogen-free standards?

Yes - the TDS2211P is certified Pb-free, halogen-free, and compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and the lead finish is fully lead-free. These compliance attributes are documented in the official Semtech TDS2211P datasheet (Rev 2.5, Nov 2021), and the device ships in tape-and-reel packaging (3,000 units per 7-inch reel) with "T22" marking code.