Semtech Corporation SCF10000

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 handling, and stable 27.5–28V clamping voltage across temperature and current range - 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 voltage stability under 40A surge, DFN-6 thermal and layout performance, 175pF junction capacitance at 22V, and compatibility with 22V working voltage systems requiring robust EOS resilience without TVS-like voltage drift.

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 path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing R_DS(on) under surge, not fixed dynamic resistance.

It operates over –40°C to +125°C with guaranteed 27.5–28V clamping at both 24A and 40A (1.2/50μs + 8/20μs combination waveform, R_S = 2Ω), and maintains <20mΩ dynamic resistance across the full 1–40A surge range - enabling predictable protection in thermally demanding environments.

Key Specifications

Pinout & Package

Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging (3,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and SP1003-020, the TDS2211P delivers superior clamping stability, higher surge endurance, and smaller footprint - making it the preferred choice for 22V power-line protection where voltage margin is tight and thermal reliability is critical.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT 22V backup power rails requiring stable component supply, long-lifecycle support, and consistent surge performance across temperature extremes.

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 semiconductors for power management, protection, sensing, and connectivity.

The TDS family was developed to replace conventional TVS diodes in high-reliability 22–36V power-line protection, delivering flat clamping, low leakage, and compact DFN packaging for next-generation USB, industrial, and storage systems.

FAQ

What is the maximum operating temperature for the TDS2211P?

The TDS2211P is rated for continuous operation from –40°C to +125°C ambient temperature. Its clamping voltage remains stable across this full range - verified at 27.5–28V under 40A surge at 125°C - making it suitable for under-hood automotive modules and industrial control cabinets where thermal management is constrained. This specification is confirmed in the Absolute Maximum Ratings and Typical Characteristics sections of the official Semtech TDS2211P datasheet Rev 2.5.

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

No, the TDS2211P is fully autonomous and requires no external bias, enable signals, or configuration. It functions as a passive, self-triggering device: the internal precision trigger circuit activates the shunt FET only when transient voltage exceeds its breakdown threshold (~25–27.9V). The TDS2211P draws zero quiescent current beyond its specified 130–600nA reverse leakage at 22V - simplifying integration into always-on and battery-powered designs.

Can the TDS2211P be used on bidirectional data lines like USB DP/DM?

No, the TDS2211P is designed exclusively for unidirectional 22V power-line protection (e.g., VBUS, load switch VIN). Its electrical characteristics - including 22V reverse stand-off, forward voltage of 0.5V, and asymmetric pin configuration (GND vs IN) - are optimized for DC power rails, not high-speed differential signaling. For USB SuperSpeed lines, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25pF), as documented in the TDS2211P application note.

How does the TDS2211P compare to standard TVS diodes in clamping behavior?

Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (V_C = V_BR + I_PP × R_DYN), the TDS2211P maintains a nearly constant 27.5–28V clamp from 1A to 40A due to its FET-based architecture and sub-20mΩ dynamic resistance. This eliminates design uncertainty caused by temperature- and current-dependent voltage overshoot - a documented advantage validated in Figure 3 of the TDS2211P datasheet Rev 2.5.

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

For best results, place the TDS2211P as close as possible to the protected connector; route all three IN pins (4,5,6) via a single short, wide trace to the line; connect all three GND pins (1,2,3) directly to a solid ground plane using multiple vias; avoid thermal relief on GND pads. These guidelines - detailed in Figure 7 of the TDS2211P datasheet - minimize parasitic inductance and ensure full 40A surge current sharing across parallel paths, preserving clamping performance.